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提交 4522d582 编写于 作者: L Linus Torvalds
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Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6 

* 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6: (156 commits)
  [PATCH] x86-64: Export smp_call_function_single
  [PATCH] i386: Clean up smp_tune_scheduling()
  [PATCH] unwinder: move .eh_frame to RODATA
  [PATCH] unwinder: fully support linker generated .eh_frame_hdr section
  [PATCH] x86-64: don't use set_irq_regs()
  [PATCH] x86-64: check vector in setup_ioapic_dest to verify if need setup_IO_APIC_irq
  [PATCH] x86-64: Make ix86 default to HIGHMEM4G instead of NOHIGHMEM
  [PATCH] i386: replace kmalloc+memset with kzalloc
  [PATCH] x86-64: remove remaining pc98 code
  [PATCH] x86-64: remove unused variable
  [PATCH] x86-64: Fix constraints in atomic_add_return()
  [PATCH] x86-64: fix asm constraints in i386 atomic_add_return
  [PATCH] x86-64: Correct documentation for bzImage protocol v2.05
  [PATCH] x86-64: replace kmalloc+memset with kzalloc in MTRR code
  [PATCH] x86-64: Fix numaq build error
  [PATCH] x86-64: include/asm-x86_64/cpufeature.h isn't a userspace header
  [PATCH] unwinder: Add debugging output to the Dwarf2 unwinder
  [PATCH] x86-64: Clarify error message in GART code
  [PATCH] x86-64: Fix interrupt race in idle callback (3rd try)
  [PATCH] x86-64: Remove unwind stack pointer alignment forcing again
  ...

Fixed conflict in include/linux/uaccess.h manually
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 6cf24f03 64a26a73
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Documentation/i386/boot.txt
浏览文件 @ 4522d582
......@@ -2,7 +2,7 @@
----------------------------
H. Peter Anvin <hpa@zytor.com>
Last update 2005-09-02
Last update 2006-11-17
On the i386 platform, the Linux kernel uses a rather complicated boot
convention. This has evolved partially due to historical aspects, as
......@@ -35,6 +35,8 @@ Protocol 2.03: (Kernel 2.4.18-pre1) Explicitly makes the highest possible
initrd address available to the bootloader.
Protocol 2.04: (Kernel 2.6.14) Extend the syssize field to four bytes.
Protocol 2.05: (Kernel 2.6.20) Make protected mode kernel relocatable.
Introduce relocatable_kernel and kernel_alignment fields.
**** MEMORY LAYOUT
......@@ -129,6 +131,8 @@ Offset Proto Name Meaning
0226/2 N/A pad1 Unused
0228/4 2.02+ cmd_line_ptr 32-bit pointer to the kernel command line
022C/4 2.03+ initrd_addr_max Highest legal initrd address
0230/4 2.05+ kernel_alignment Physical addr alignment required for kernel
0234/1 2.05+ relocatable_kernel Whether kernel is relocatable or not
(1) For backwards compatibility, if the setup_sects field contains 0, the
real value is 4.
......
Documentation/kernel-parameters.txt
浏览文件 @ 4522d582
......@@ -599,8 +599,6 @@ and is between 256 and 4096 characters. It is defined in the file
hugepages= [HW,IA-32,IA-64] Maximal number of HugeTLB pages.
noirqbalance [IA-32,SMP,KNL] Disable kernel irq balancing
i8042.direct [HW] Put keyboard port into non-translated mode
i8042.dumbkbd [HW] Pretend that controller can only read data from
keyboard and cannot control its state
......@@ -1065,9 +1063,14 @@ and is between 256 and 4096 characters. It is defined in the file
in certain environments such as networked servers or
real-time systems.
noirqbalance [IA-32,SMP,KNL] Disable kernel irq balancing
noirqdebug [IA-32] Disables the code which attempts to detect and
disable unhandled interrupt sources.
no_timer_check [IA-32,X86_64,APIC] Disables the code which tests for
broken timer IRQ sources.
noisapnp [ISAPNP] Disables ISA PnP code.
noinitrd [RAM] Tells the kernel not to load any configured
......@@ -1752,6 +1755,9 @@ and is between 256 and 4096 characters. It is defined in the file
norandmaps Don't use address space randomization
Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space
unwind_debug=N N > 0 will enable dwarf2 unwinder debugging
This is useful to get more information why
you got a "dwarf2 unwinder stuck"
______________________________________________________________________
......
Documentation/stable_api_nonsense.txt
浏览文件 @ 4522d582
......@@ -62,9 +62,6 @@ consider the following facts about the Linux kernel:
- different structures can contain different fields
- Some functions may not be implemented at all, (i.e. some locks
compile away to nothing for non-SMP builds.)
- Parameter passing of variables from function to function can be
done in different ways (the CONFIG_REGPARM option controls
this.)
- Memory within the kernel can be aligned in different ways,
depending on the build options.
- Linux runs on a wide range of different processor architectures.
......
Documentation/sysctl/kernel.txt
浏览文件 @ 4522d582
......@@ -27,6 +27,7 @@ show up in /proc/sys/kernel:
- hotplug
- java-appletviewer [ binfmt_java, obsolete ]
- java-interpreter [ binfmt_java, obsolete ]
- kstack_depth_to_print [ X86 only ]
- l2cr [ PPC only ]
- modprobe ==> Documentation/kmod.txt
- msgmax
......@@ -170,6 +171,13 @@ This flag controls the L2 cache of G3 processor boards. If
==============================================================
kstack_depth_to_print: (X86 only)
Controls the number of words to print when dumping the raw
kernel stack.
==============================================================
osrelease, ostype & version:
# cat osrelease
......
Documentation/x86_64/boot-options.txt
浏览文件 @ 4522d582
......@@ -52,10 +52,6 @@ APICs
apicmaintimer. Useful when your PIT timer is totally
broken.
disable_8254_timer / enable_8254_timer
Enable interrupt 0 timer routing over the 8254 in addition to over
the IO-APIC. The kernel tries to set a sensible default.
Early Console
syntax: earlyprintk=vga
......@@ -183,7 +179,7 @@ PCI
IOMMU
iommu=[size][,noagp][,off][,force][,noforce][,leak][,memaper[=order]][,merge]
[,forcesac][,fullflush][,nomerge][,noaperture]
[,forcesac][,fullflush][,nomerge][,noaperture][,calgary]
size set size of iommu (in bytes)
noagp don't initialize the AGP driver and use full aperture.
off don't use the IOMMU
......@@ -204,6 +200,7 @@ IOMMU
buffering.
nodac Forbid DMA >4GB
panic Always panic when IOMMU overflows
calgary Use the Calgary IOMMU if it is available
swiotlb=pages[,force]
......
arch/h8300/kernel/vmlinux.lds.S
浏览文件 @ 4522d582
......@@ -70,6 +70,7 @@ SECTIONS
#endif
.text :
{
_text = .;
#if defined(CONFIG_ROMKERNEL)
*(.int_redirect)
#endif
......
arch/i386/Kconfig
浏览文件 @ 4522d582
......@@ -182,6 +182,17 @@ config X86_ES7000
endchoice
config PARAVIRT
bool "Paravirtualization support (EXPERIMENTAL)"
depends on EXPERIMENTAL
help
Paravirtualization is a way of running multiple instances of
Linux on the same machine, under a hypervisor. This option
changes the kernel so it can modify itself when it is run
under a hypervisor, improving performance significantly.
However, when run without a hypervisor the kernel is
theoretically slower. If in doubt, say N.
config ACPI_SRAT
bool
default y
......@@ -443,7 +454,8 @@ source "drivers/firmware/Kconfig"
choice
prompt "High Memory Support"
default NOHIGHMEM
default HIGHMEM4G if !X86_NUMAQ
default HIGHMEM64G if X86_NUMAQ
config NOHIGHMEM
bool "off"
......@@ -710,20 +722,6 @@ config BOOT_IOREMAP
depends on (((X86_SUMMIT || X86_GENERICARCH) && NUMA) || (X86 && EFI))
default y
config REGPARM
bool "Use register arguments"
default y
help
Compile the kernel with -mregparm=3. This instructs gcc to use
a more efficient function call ABI which passes the first three
arguments of a function call via registers, which results in denser
and faster code.
If this option is disabled, then the default ABI of passing
arguments via the stack is used.
If unsure, say Y.
config SECCOMP
bool "Enable seccomp to safely compute untrusted bytecode"
depends on PROC_FS
......@@ -773,23 +771,39 @@ config CRASH_DUMP
PHYSICAL_START.
For more details see Documentation/kdump/kdump.txt
config PHYSICAL_START
hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
config RELOCATABLE
bool "Build a relocatable kernel(EXPERIMENTAL)"
depends on EXPERIMENTAL
help
This build a kernel image that retains relocation information
so it can be loaded someplace besides the default 1MB.
The relocations tend to the kernel binary about 10% larger,
but are discarded at runtime.
One use is for the kexec on panic case where the recovery kernel
must live at a different physical address than the primary
kernel.
default "0x1000000" if CRASH_DUMP
config PHYSICAL_ALIGN
hex "Alignment value to which kernel should be aligned"
default "0x100000"
range 0x2000 0x400000
help
This gives the physical address where the kernel is loaded. Normally
for regular kernels this value is 0x100000 (1MB). But in the case
of kexec on panic the fail safe kernel needs to run at a different
address than the panic-ed kernel. This option is used to set the load
address for kernels used to capture crash dump on being kexec'ed
after panic. The default value for crash dump kernels is
0x1000000 (16MB). This can also be set based on the "X" value as
specified in the "crashkernel=YM@XM" command line boot parameter
passed to the panic-ed kernel. Typically this parameter is set as
crashkernel=64M@16M. Please take a look at
Documentation/kdump/kdump.txt for more details about crash dumps.
This value puts the alignment restrictions on physical address
where kernel is loaded and run from. Kernel is compiled for an
address which meets above alignment restriction.
If bootloader loads the kernel at a non-aligned address and
CONFIG_RELOCATABLE is set, kernel will move itself to nearest
address aligned to above value and run from there.
If bootloader loads the kernel at a non-aligned address and
CONFIG_RELOCATABLE is not set, kernel will ignore the run time
load address and decompress itself to the address it has been
compiled for and run from there. The address for which kernel is
compiled already meets above alignment restrictions. Hence the
end result is that kernel runs from a physical address meeting
above alignment restrictions.
Don't change this unless you know what you are doing.
......
arch/i386/Kconfig.cpu
浏览文件 @ 4522d582
......@@ -103,8 +103,15 @@ config MPENTIUMM
Select this for Intel Pentium M (not Pentium-4 M)
notebook chips.
config MCORE2
bool "Core 2/newer Xeon"
help
Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and 53xx)
CPUs. You can distingush newer from older Xeons by the CPU family
in /proc/cpuinfo. Newer ones have 6.
config MPENTIUM4
bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon"
bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon"
help
Select this for Intel Pentium 4 chips. This includes the
Pentium 4, P4-based Celeron and Xeon, and Pentium-4 M
......@@ -229,7 +236,7 @@ config X86_L1_CACHE_SHIFT
default "7" if MPENTIUM4 || X86_GENERIC
default "4" if X86_ELAN || M486 || M386 || MGEODEGX1
default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
default "6" if MK7 || MK8 || MPENTIUMM
default "6" if MK7 || MK8 || MPENTIUMM || MCORE2
config RWSEM_GENERIC_SPINLOCK
bool
......@@ -287,17 +294,17 @@ config X86_ALIGNMENT_16
config X86_GOOD_APIC
bool
depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON
depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON || MCORE2
default y
config X86_INTEL_USERCOPY
bool
depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON
depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2
default y
config X86_USE_PPRO_CHECKSUM
bool
depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX
depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2
default y
config X86_USE_3DNOW
......@@ -312,5 +319,5 @@ config X86_OOSTORE
config X86_TSC
bool
depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MGEODEGX1 || MGEODE_LX) && !X86_NUMAQ
depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ
default y
arch/i386/Kconfig.debug
浏览文件 @ 4522d582
......@@ -85,4 +85,14 @@ config DOUBLEFAULT
option saves about 4k and might cause you much additional grey
hair.
config DEBUG_PARAVIRT
bool "Enable some paravirtualization debugging"
default y
depends on PARAVIRT && DEBUG_KERNEL
help
Currently deliberately clobbers regs which are allowed to be
clobbered in inlined paravirt hooks, even in native mode.
If turning this off solves a problem, then DISABLE_INTERRUPTS() or
ENABLE_INTERRUPTS() is lying about what registers can be clobbered.
endmenu
arch/i386/Makefile
浏览文件 @ 4522d582
......@@ -26,10 +26,12 @@ endif
LDFLAGS := -m elf_i386
OBJCOPYFLAGS := -O binary -R .note -R .comment -S
LDFLAGS_vmlinux :=
ifdef CONFIG_RELOCATABLE
LDFLAGS_vmlinux := --emit-relocs
endif
CHECKFLAGS += -D__i386__
CFLAGS += -pipe -msoft-float
CFLAGS += -pipe -msoft-float -mregparm=3
# prevent gcc from keeping the stack 16 byte aligned
CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
......@@ -37,8 +39,6 @@ CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
# CPU-specific tuning. Anything which can be shared with UML should go here.
include $(srctree)/arch/i386/Makefile.cpu
cflags-$(CONFIG_REGPARM) += -mregparm=3
# temporary until string.h is fixed
cflags-y += -ffreestanding
......
arch/i386/Makefile.cpu
浏览文件 @ 4522d582
......@@ -32,6 +32,7 @@ cflags-$(CONFIG_MWINCHIP2) += $(call cc-option,-march=winchip2,-march=i586)
cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586)
cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686)
cflags-$(CONFIG_MCORE2) += -march=i686 $(call cc-option,-mtune=core2,$(call cc-option,-mtune=generic,-mtune=i686))
# AMD Elan support
cflags-$(CONFIG_X86_ELAN) += -march=i486
......
arch/i386/boot/compressed/Makefile
浏览文件 @ 4522d582
......@@ -4,22 +4,42 @@
# create a compressed vmlinux image from the original vmlinux
#
targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o \
vmlinux.bin.all vmlinux.relocs
EXTRA_AFLAGS := -traditional
LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -e startup_32
LDFLAGS_vmlinux := -T
CFLAGS_misc.o += -fPIC
hostprogs-y := relocs
$(obj)/vmlinux: $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o FORCE
$(obj)/vmlinux: $(src)/vmlinux.lds $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o FORCE
$(call if_changed,ld)
@:
$(obj)/vmlinux.bin: vmlinux FORCE
$(call if_changed,objcopy)
quiet_cmd_relocs = RELOCS $@
cmd_relocs = $(obj)/relocs $< > $@;$(obj)/relocs --abs-relocs $<
$(obj)/vmlinux.relocs: vmlinux $(obj)/relocs FORCE
$(call if_changed,relocs)
vmlinux.bin.all-y := $(obj)/vmlinux.bin
vmlinux.bin.all-$(CONFIG_RELOCATABLE) += $(obj)/vmlinux.relocs
quiet_cmd_relocbin = BUILD $@
cmd_relocbin = cat $(filter-out FORCE,$^) > $@
$(obj)/vmlinux.bin.all: $(vmlinux.bin.all-y) FORCE
$(call if_changed,relocbin)
ifdef CONFIG_RELOCATABLE
$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin.all FORCE
$(call if_changed,gzip)
else
$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
$(call if_changed,gzip)
endif
LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
$(obj)/piggy.o: $(src)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
$(call if_changed,ld)
arch/i386/boot/compressed/head.S
浏览文件 @ 4522d582
......@@ -26,9 +26,11 @@
#include <linux/linkage.h>
#include <asm/segment.h>
#include <asm/page.h>
#include <asm/boot.h>
.section ".text.head"
.globl startup_32
startup_32:
cld
cli
......@@ -37,93 +39,142 @@ startup_32:
movl %eax,%es
movl %eax,%fs
movl %eax,%gs
movl %eax,%ss
lss stack_start,%esp
xorl %eax,%eax
1: incl %eax # check that A20 really IS enabled
movl %eax,0x000000 # loop forever if it isn't
cmpl %eax,0x100000
je 1b
/* Calculate the delta between where we were compiled to run
* at and where we were actually loaded at. This can only be done
* with a short local call on x86. Nothing else will tell us what
* address we are running at. The reserved chunk of the real-mode
* data at 0x34-0x3f are used as the stack for this calculation.
* Only 4 bytes are needed.
*/
leal 0x40(%esi), %esp
call 1f
1: popl %ebp
subl $1b, %ebp
/* %ebp contains the address we are loaded at by the boot loader and %ebx
* contains the address where we should move the kernel image temporarily
* for safe in-place decompression.
*/
#ifdef CONFIG_RELOCATABLE
movl %ebp, %ebx
addl $(CONFIG_PHYSICAL_ALIGN - 1), %ebx
andl $(~(CONFIG_PHYSICAL_ALIGN - 1)), %ebx
#else
movl $LOAD_PHYSICAL_ADDR, %ebx
#endif
/* Replace the compressed data size with the uncompressed size */
subl input_len(%ebp), %ebx
movl output_len(%ebp), %eax
addl %eax, %ebx
/* Add 8 bytes for every 32K input block */
shrl $12, %eax
addl %eax, %ebx
/* Add 32K + 18 bytes of extra slack */
addl $(32768 + 18), %ebx
/* Align on a 4K boundary */
addl $4095, %ebx
andl $~4095, %ebx
/* Copy the compressed kernel to the end of our buffer
* where decompression in place becomes safe.
*/
pushl %esi
leal _end(%ebp), %esi
leal _end(%ebx), %edi
movl $(_end - startup_32), %ecx
std
rep
movsb
cld
popl %esi
/* Compute the kernel start address.
*/
#ifdef CONFIG_RELOCATABLE
addl $(CONFIG_PHYSICAL_ALIGN - 1), %ebp
andl $(~(CONFIG_PHYSICAL_ALIGN - 1)), %ebp
#else
movl $LOAD_PHYSICAL_ADDR, %ebp
#endif
/*
* Initialize eflags. Some BIOS's leave bits like NT set. This would
* confuse the debugger if this code is traced.
* XXX - best to initialize before switching to protected mode.
* Jump to the relocated address.
*/
pushl $0
popfl
leal relocated(%ebx), %eax
jmp *%eax
.section ".text"
relocated:
/*
* Clear BSS
*/
xorl %eax,%eax
movl $_edata,%edi
movl $_end,%ecx
leal _edata(%ebx),%edi
leal _end(%ebx), %ecx
subl %edi,%ecx
cld
rep
stosb
/*
* Setup the stack for the decompressor
*/
leal stack_end(%ebx), %esp
/*
* Do the decompression, and jump to the new kernel..
*/
subl $16,%esp # place for structure on the stack
movl %esp,%eax
movl output_len(%ebx), %eax
pushl %eax
pushl %ebp # output address
movl input_len(%ebx), %eax
pushl %eax # input_len
leal input_data(%ebx), %eax
pushl %eax # input_data
leal _end(%ebx), %eax
pushl %eax # end of the image as third argument
pushl %esi # real mode pointer as second arg
pushl %eax # address of structure as first arg
call decompress_kernel
orl %eax,%eax
jnz 3f
popl %esi # discard address
popl %esi # real mode pointer
xorl %ebx,%ebx
ljmp $(__BOOT_CS), $__PHYSICAL_START
addl $20, %esp
popl %ecx
#if CONFIG_RELOCATABLE
/* Find the address of the relocations.
*/
movl %ebp, %edi
addl %ecx, %edi
/* Calculate the delta between where vmlinux was compiled to run
* and where it was actually loaded.
*/
movl %ebp, %ebx
subl $LOAD_PHYSICAL_ADDR, %ebx
jz 2f /* Nothing to be done if loaded at compiled addr. */
/*
* We come here, if we were loaded high.
* We need to move the move-in-place routine down to 0x1000
* and then start it with the buffer addresses in registers,
* which we got from the stack.
* Process relocations.
*/
3:
movl $move_routine_start,%esi
movl $0x1000,%edi
movl $move_routine_end,%ecx
subl %esi,%ecx
addl $3,%ecx
shrl $2,%ecx
cld
rep
movsl
popl %esi # discard the address
popl %ebx # real mode pointer
popl %esi # low_buffer_start
popl %ecx # lcount
popl %edx # high_buffer_start
popl %eax # hcount
movl $__PHYSICAL_START,%edi
cli # make sure we don't get interrupted
ljmp $(__BOOT_CS), $0x1000 # and jump to the move routine
1: subl $4, %edi
movl 0(%edi), %ecx
testl %ecx, %ecx
jz 2f
addl %ebx, -__PAGE_OFFSET(%ebx, %ecx)
jmp 1b
2:
#endif
/*
* Routine (template) for moving the decompressed kernel in place,
* if we were high loaded. This _must_ PIC-code !
* Jump to the decompressed kernel.
*/
move_routine_start:
movl %ecx,%ebp
shrl $2,%ecx
rep
movsl
movl %ebp,%ecx
andl $3,%ecx
rep
movsb
movl %edx,%esi
movl %eax,%ecx # NOTE: rep movsb won't move if %ecx == 0
addl $3,%ecx
shrl $2,%ecx
rep
movsl
movl %ebx,%esi # Restore setup pointer
xorl %ebx,%ebx
ljmp $(__BOOT_CS), $__PHYSICAL_START
move_routine_end:
jmp *%ebp
.bss
.balign 4
stack:
.fill 4096, 1, 0
stack_end:
arch/i386/boot/compressed/misc.c
浏览文件 @ 4522d582
......@@ -9,11 +9,94 @@
* High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
*/
#undef CONFIG_PARAVIRT
#include <linux/linkage.h>
#include <linux/vmalloc.h>
#include <linux/screen_info.h>
#include <asm/io.h>
#include <asm/page.h>
#include <asm/boot.h>
/* WARNING!!
* This code is compiled with -fPIC and it is relocated dynamically
* at run time, but no relocation processing is performed.
* This means that it is not safe to place pointers in static structures.
*/
/*
* Getting to provable safe in place decompression is hard.
* Worst case behaviours need to be analized.
* Background information:
*
* The file layout is:
* magic[2]
* method[1]
* flags[1]
* timestamp[4]
* extraflags[1]
* os[1]
* compressed data blocks[N]
* crc[4] orig_len[4]
*
* resulting in 18 bytes of non compressed data overhead.
*
* Files divided into blocks
* 1 bit (last block flag)
* 2 bits (block type)
*
* 1 block occurs every 32K -1 bytes or when there 50% compression has been achieved.
* The smallest block type encoding is always used.
*
* stored:
* 32 bits length in bytes.
*
* fixed:
* magic fixed tree.
* symbols.
*
* dynamic:
* dynamic tree encoding.
* symbols.
*
*
* The buffer for decompression in place is the length of the
* uncompressed data, plus a small amount extra to keep the algorithm safe.
* The compressed data is placed at the end of the buffer. The output
* pointer is placed at the start of the buffer and the input pointer
* is placed where the compressed data starts. Problems will occur
* when the output pointer overruns the input pointer.
*
* The output pointer can only overrun the input pointer if the input
* pointer is moving faster than the output pointer. A condition only
* triggered by data whose compressed form is larger than the uncompressed
* form.
*
* The worst case at the block level is a growth of the compressed data
* of 5 bytes per 32767 bytes.
*
* The worst case internal to a compressed block is very hard to figure.
* The worst case can at least be boundined by having one bit that represents
* 32764 bytes and then all of the rest of the bytes representing the very
* very last byte.
*
* All of which is enough to compute an amount of extra data that is required
* to be safe. To avoid problems at the block level allocating 5 extra bytes
* per 32767 bytes of data is sufficient. To avoind problems internal to a block
* adding an extra 32767 bytes (the worst case uncompressed block size) is
* sufficient, to ensure that in the worst case the decompressed data for
* block will stop the byte before the compressed data for a block begins.
* To avoid problems with the compressed data's meta information an extra 18
* bytes are needed. Leading to the formula:
*
* extra_bytes = (uncompressed_size >> 12) + 32768 + 18 + decompressor_size.
*
* Adding 8 bytes per 32K is a bit excessive but much easier to calculate.
* Adding 32768 instead of 32767 just makes for round numbers.
* Adding the decompressor_size is necessary as it musht live after all
* of the data as well. Last I measured the decompressor is about 14K.
* 10K of actuall data and 4K of bss.
*
*/
/*
* gzip declarations
......@@ -30,15 +113,20 @@ typedef unsigned char uch;
typedef unsigned short ush;
typedef unsigned long ulg;
#define WSIZE 0x8000 /* Window size must be at least 32k, */
/* and a power of two */
#define WSIZE 0x80000000 /* Window size must be at least 32k,
* and a power of two
* We don't actually have a window just
* a huge output buffer so I report
* a 2G windows size, as that should
* always be larger than our output buffer.
*/
static uch *inbuf; /* input buffer */
static uch window[WSIZE]; /* Sliding window buffer */
static uch *inbuf; /* input buffer */
static uch *window; /* Sliding window buffer, (and final output buffer) */
static unsigned insize = 0; /* valid bytes in inbuf */
static unsigned inptr = 0; /* index of next byte to be processed in inbuf */
static unsigned outcnt = 0; /* bytes in output buffer */
static unsigned insize; /* valid bytes in inbuf */
static unsigned inptr; /* index of next byte to be processed in inbuf */
static unsigned outcnt; /* bytes in output buffer */
/* gzip flag byte */
#define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */
......@@ -89,8 +177,6 @@ extern unsigned char input_data[];
extern int input_len;
static long bytes_out = 0;
static uch *output_data;
static unsigned long output_ptr = 0;
static void *malloc(int size);
static void free(void *where);
......@@ -100,24 +186,17 @@ static void *memcpy(void *dest, const void *src, unsigned n);
static void putstr(const char *);
extern int end;
static long free_mem_ptr = (long)&end;
static long free_mem_end_ptr;
static unsigned long free_mem_ptr;
static unsigned long free_mem_end_ptr;
#define INPLACE_MOVE_ROUTINE 0x1000
#define LOW_BUFFER_START 0x2000
#define LOW_BUFFER_MAX 0x90000
#define HEAP_SIZE 0x3000
static unsigned int low_buffer_end, low_buffer_size;
static int high_loaded =0;
static uch *high_buffer_start /* = (uch *)(((ulg)&end) + HEAP_SIZE)*/;
static char *vidmem = (char *)0xb8000;
static int vidport;
static int lines, cols;
#ifdef CONFIG_X86_NUMAQ
static void * xquad_portio = NULL;
void *xquad_portio;
#endif
#include "../../../../lib/inflate.c"
......@@ -151,7 +230,7 @@ static void gzip_mark(void **ptr)
static void gzip_release(void **ptr)
{
free_mem_ptr = (long) *ptr;
free_mem_ptr = (unsigned long) *ptr;
}
static void scroll(void)
......@@ -179,7 +258,7 @@ static void putstr(const char *s)
y--;
}
} else {
vidmem [ ( x + cols * y ) * 2 ] = c;
vidmem [ ( x + cols * y ) * 2 ] = c;
if ( ++x >= cols ) {
x = 0;
if ( ++y >= lines ) {
......@@ -224,58 +303,31 @@ static void* memcpy(void* dest, const void* src, unsigned n)
*/
static int fill_inbuf(void)
{
if (insize != 0) {
error("ran out of input data");
}
inbuf = input_data;
insize = input_len;
inptr = 1;
return inbuf[0];
error("ran out of input data");
return 0;
}
/* ===========================================================================
* Write the output window window[0..outcnt-1] and update crc and bytes_out.
* (Used for the decompressed data only.)
*/
static void flush_window_low(void)
{
ulg c = crc; /* temporary variable */
unsigned n;
uch *in, *out, ch;
in = window;
out = &output_data[output_ptr];
for (n = 0; n < outcnt; n++) {
ch = *out++ = *in++;
c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
}
crc = c;
bytes_out += (ulg)outcnt;
output_ptr += (ulg)outcnt;
outcnt = 0;
}
static void flush_window_high(void)
{
ulg c = crc; /* temporary variable */
unsigned n;
uch *in, ch;
in = window;
for (n = 0; n < outcnt; n++) {
ch = *output_data++ = *in++;
if ((ulg)output_data == low_buffer_end) output_data=high_buffer_start;
c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
}
crc = c;
bytes_out += (ulg)outcnt;
outcnt = 0;
}
static void flush_window(void)
{
if (high_loaded) flush_window_high();
else flush_window_low();
/* With my window equal to my output buffer
* I only need to compute the crc here.
*/
ulg c = crc; /* temporary variable */
unsigned n;
uch *in, ch;
in = window;
for (n = 0; n < outcnt; n++) {
ch = *in++;
c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
}
crc = c;
bytes_out += (ulg)outcnt;
outcnt = 0;
}
static void error(char *x)
......@@ -287,66 +339,8 @@ static void error(char *x)
while(1); /* Halt */
}
#define STACK_SIZE (4096)
long user_stack [STACK_SIZE];
struct {
long * a;
short b;
} stack_start = { & user_stack [STACK_SIZE] , __BOOT_DS };
static void setup_normal_output_buffer(void)
{
#ifdef STANDARD_MEMORY_BIOS_CALL
if (RM_EXT_MEM_K < 1024) error("Less than 2MB of memory");
#else
if ((RM_ALT_MEM_K > RM_EXT_MEM_K ? RM_ALT_MEM_K : RM_EXT_MEM_K) < 1024) error("Less than 2MB of memory");
#endif
output_data = (unsigned char *)__PHYSICAL_START; /* Normally Points to 1M */
free_mem_end_ptr = (long)real_mode;
}
struct moveparams {
uch *low_buffer_start; int lcount;
uch *high_buffer_start; int hcount;
};
static void setup_output_buffer_if_we_run_high(struct moveparams *mv)
{
high_buffer_start = (uch *)(((ulg)&end) + HEAP_SIZE);
#ifdef STANDARD_MEMORY_BIOS_CALL
if (RM_EXT_MEM_K < (3*1024)) error("Less than 4MB of memory");
#else
if ((RM_ALT_MEM_K > RM_EXT_MEM_K ? RM_ALT_MEM_K : RM_EXT_MEM_K) < (3*1024)) error("Less than 4MB of memory");
#endif
mv->low_buffer_start = output_data = (unsigned char *)LOW_BUFFER_START;
low_buffer_end = ((unsigned int)real_mode > LOW_BUFFER_MAX
? LOW_BUFFER_MAX : (unsigned int)real_mode) & ~0xfff;
low_buffer_size = low_buffer_end - LOW_BUFFER_START;
high_loaded = 1;
free_mem_end_ptr = (long)high_buffer_start;
if ( (__PHYSICAL_START + low_buffer_size) > ((ulg)high_buffer_start)) {
high_buffer_start = (uch *)(__PHYSICAL_START + low_buffer_size);
mv->hcount = 0; /* say: we need not to move high_buffer */
}
else mv->hcount = -1;
mv->high_buffer_start = high_buffer_start;
}
static void close_output_buffer_if_we_run_high(struct moveparams *mv)
{
if (bytes_out > low_buffer_size) {
mv->lcount = low_buffer_size;
if (mv->hcount)
mv->hcount = bytes_out - low_buffer_size;
} else {
mv->lcount = bytes_out;
mv->hcount = 0;
}
}
asmlinkage int decompress_kernel(struct moveparams *mv, void *rmode)
asmlinkage void decompress_kernel(void *rmode, unsigned long end,
uch *input_data, unsigned long input_len, uch *output)
{
real_mode = rmode;
......@@ -361,13 +355,25 @@ asmlinkage int decompress_kernel(struct moveparams *mv, void *rmode)
lines = RM_SCREEN_INFO.orig_video_lines;
cols = RM_SCREEN_INFO.orig_video_cols;
if (free_mem_ptr < 0x100000) setup_normal_output_buffer();
else setup_output_buffer_if_we_run_high(mv);
window = output; /* Output buffer (Normally at 1M) */
free_mem_ptr = end; /* Heap */
free_mem_end_ptr = end + HEAP_SIZE;
inbuf = input_data; /* Input buffer */
insize = input_len;
inptr = 0;
if ((u32)output & (CONFIG_PHYSICAL_ALIGN -1))
error("Destination address not CONFIG_PHYSICAL_ALIGN aligned");
if (end > ((-__PAGE_OFFSET-(512 <<20)-1) & 0x7fffffff))
error("Destination address too large");
#ifndef CONFIG_RELOCATABLE
if ((u32)output != LOAD_PHYSICAL_ADDR)
error("Wrong destination address");
#endif
makecrc();
putstr("Uncompressing Linux... ");
gunzip();
putstr("Ok, booting the kernel.\n");
if (high_loaded) close_output_buffer_if_we_run_high(mv);
return high_loaded;
return;
}
arch/i386/boot/compressed/relocs.c 0 → 100644
浏览文件 @ 4522d582
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <elf.h>
#include <byteswap.h>
#define USE_BSD
#include <endian.h>
#define MAX_SHDRS 100
static Elf32_Ehdr ehdr;
static Elf32_Shdr shdr[MAX_SHDRS];
static Elf32_Sym *symtab[MAX_SHDRS];
static Elf32_Rel *reltab[MAX_SHDRS];
static char *strtab[MAX_SHDRS];
static unsigned long reloc_count, reloc_idx;
static unsigned long *relocs;
/*
* Following symbols have been audited. There values are constant and do
* not change if bzImage is loaded at a different physical address than
* the address for which it has been compiled. Don't warn user about
* absolute relocations present w.r.t these symbols.
*/
static const char* safe_abs_relocs[] = {
"__kernel_vsyscall",
"__kernel_rt_sigreturn",
"__kernel_sigreturn",
"SYSENTER_RETURN",
};
static int is_safe_abs_reloc(const char* sym_name)
{
int i, array_size;
array_size = sizeof(safe_abs_relocs)/sizeof(char*);
for(i = 0; i < array_size; i++) {
if (!strcmp(sym_name, safe_abs_relocs[i]))
/* Match found */
return 1;
}
return 0;
}
static void die(char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
exit(1);
}
static const char *sym_type(unsigned type)
{
static const char *type_name[] = {
#define SYM_TYPE(X) [X] = #X
SYM_TYPE(STT_NOTYPE),
SYM_TYPE(STT_OBJECT),
SYM_TYPE(STT_FUNC),
SYM_TYPE(STT_SECTION),
SYM_TYPE(STT_FILE),
SYM_TYPE(STT_COMMON),
SYM_TYPE(STT_TLS),
#undef SYM_TYPE
};
const char *name = "unknown sym type name";
if (type < sizeof(type_name)/sizeof(type_name[0])) {
name = type_name[type];
}
return name;
}
static const char *sym_bind(unsigned bind)
{
static const char *bind_name[] = {
#define SYM_BIND(X) [X] = #X
SYM_BIND(STB_LOCAL),
SYM_BIND(STB_GLOBAL),
SYM_BIND(STB_WEAK),
#undef SYM_BIND
};
const char *name = "unknown sym bind name";
if (bind < sizeof(bind_name)/sizeof(bind_name[0])) {
name = bind_name[bind];
}
return name;
}
static const char *sym_visibility(unsigned visibility)
{
static const char *visibility_name[] = {
#define SYM_VISIBILITY(X) [X] = #X
SYM_VISIBILITY(STV_DEFAULT),
SYM_VISIBILITY(STV_INTERNAL),
SYM_VISIBILITY(STV_HIDDEN),
SYM_VISIBILITY(STV_PROTECTED),
#undef SYM_VISIBILITY
};
const char *name = "unknown sym visibility name";
if (visibility < sizeof(visibility_name)/sizeof(visibility_name[0])) {
name = visibility_name[visibility];
}
return name;
}
static const char *rel_type(unsigned type)
{
static const char *type_name[] = {
#define REL_TYPE(X) [X] = #X
REL_TYPE(R_386_NONE),
REL_TYPE(R_386_32),
REL_TYPE(R_386_PC32),
REL_TYPE(R_386_GOT32),
REL_TYPE(R_386_PLT32),
REL_TYPE(R_386_COPY),
REL_TYPE(R_386_GLOB_DAT),
REL_TYPE(R_386_JMP_SLOT),
REL_TYPE(R_386_RELATIVE),
REL_TYPE(R_386_GOTOFF),
REL_TYPE(R_386_GOTPC),
#undef REL_TYPE
};
const char *name = "unknown type rel type name";
if (type < sizeof(type_name)/sizeof(type_name[0])) {
name = type_name[type];
}
return name;
}
static const char *sec_name(unsigned shndx)
{
const char *sec_strtab;
const char *name;
sec_strtab = strtab[ehdr.e_shstrndx];
name = "<noname>";
if (shndx < ehdr.e_shnum) {
name = sec_strtab + shdr[shndx].sh_name;
}
else if (shndx == SHN_ABS) {
name = "ABSOLUTE";
}
else if (shndx == SHN_COMMON) {
name = "COMMON";
}
return name;
}
static const char *sym_name(const char *sym_strtab, Elf32_Sym *sym)
{
const char *name;
name = "<noname>";
if (sym->st_name) {
name = sym_strtab + sym->st_name;
}
else {
name = sec_name(shdr[sym->st_shndx].sh_name);
}
return name;
}
#if BYTE_ORDER == LITTLE_ENDIAN
#define le16_to_cpu(val) (val)
#define le32_to_cpu(val) (val)
#endif
#if BYTE_ORDER == BIG_ENDIAN
#define le16_to_cpu(val) bswap_16(val)
#define le32_to_cpu(val) bswap_32(val)
#endif
static uint16_t elf16_to_cpu(uint16_t val)
{
return le16_to_cpu(val);
}
static uint32_t elf32_to_cpu(uint32_t val)
{
return le32_to_cpu(val);
}
static void read_ehdr(FILE *fp)
{
if (fread(&ehdr, sizeof(ehdr), 1, fp) != 1) {
die("Cannot read ELF header: %s\n",
strerror(errno));
}
if (memcmp(ehdr.e_ident, ELFMAG, 4) != 0) {
die("No ELF magic\n");
}
if (ehdr.e_ident[EI_CLASS] != ELFCLASS32) {
die("Not a 32 bit executable\n");
}
if (ehdr.e_ident[EI_DATA] != ELFDATA2LSB) {
die("Not a LSB ELF executable\n");
}
if (ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
die("Unknown ELF version\n");
}
/* Convert the fields to native endian */
ehdr.e_type = elf16_to_cpu(ehdr.e_type);
ehdr.e_machine = elf16_to_cpu(ehdr.e_machine);
ehdr.e_version = elf32_to_cpu(ehdr.e_version);
ehdr.e_entry = elf32_to_cpu(ehdr.e_entry);
ehdr.e_phoff = elf32_to_cpu(ehdr.e_phoff);
ehdr.e_shoff = elf32_to_cpu(ehdr.e_shoff);
ehdr.e_flags = elf32_to_cpu(ehdr.e_flags);
ehdr.e_ehsize = elf16_to_cpu(ehdr.e_ehsize);
ehdr.e_phentsize = elf16_to_cpu(ehdr.e_phentsize);
ehdr.e_phnum = elf16_to_cpu(ehdr.e_phnum);
ehdr.e_shentsize = elf16_to_cpu(ehdr.e_shentsize);
ehdr.e_shnum = elf16_to_cpu(ehdr.e_shnum);
ehdr.e_shstrndx = elf16_to_cpu(ehdr.e_shstrndx);
if ((ehdr.e_type != ET_EXEC) && (ehdr.e_type != ET_DYN)) {
die("Unsupported ELF header type\n");
}
if (ehdr.e_machine != EM_386) {
die("Not for x86\n");
}
if (ehdr.e_version != EV_CURRENT) {
die("Unknown ELF version\n");
}
if (ehdr.e_ehsize != sizeof(Elf32_Ehdr)) {
die("Bad Elf header size\n");
}
if (ehdr.e_phentsize != sizeof(Elf32_Phdr)) {
die("Bad program header entry\n");
}
if (ehdr.e_shentsize != sizeof(Elf32_Shdr)) {
die("Bad section header entry\n");
}
if (ehdr.e_shstrndx >= ehdr.e_shnum) {
die("String table index out of bounds\n");
}
}
static void read_shdrs(FILE *fp)
{
int i;
if (ehdr.e_shnum > MAX_SHDRS) {
die("%d section headers supported: %d\n",
ehdr.e_shnum, MAX_SHDRS);
}
if (fseek(fp, ehdr.e_shoff, SEEK_SET) < 0) {
die("Seek to %d failed: %s\n",
ehdr.e_shoff, strerror(errno));
}
if (fread(&shdr, sizeof(shdr[0]), ehdr.e_shnum, fp) != ehdr.e_shnum) {
die("Cannot read ELF section headers: %s\n",
strerror(errno));
}
for(i = 0; i < ehdr.e_shnum; i++) {
shdr[i].sh_name = elf32_to_cpu(shdr[i].sh_name);
shdr[i].sh_type = elf32_to_cpu(shdr[i].sh_type);
shdr[i].sh_flags = elf32_to_cpu(shdr[i].sh_flags);
shdr[i].sh_addr = elf32_to_cpu(shdr[i].sh_addr);
shdr[i].sh_offset = elf32_to_cpu(shdr[i].sh_offset);
shdr[i].sh_size = elf32_to_cpu(shdr[i].sh_size);
shdr[i].sh_link = elf32_to_cpu(shdr[i].sh_link);
shdr[i].sh_info = elf32_to_cpu(shdr[i].sh_info);
shdr[i].sh_addralign = elf32_to_cpu(shdr[i].sh_addralign);
shdr[i].sh_entsize = elf32_to_cpu(shdr[i].sh_entsize);
}
}
static void read_strtabs(FILE *fp)
{
int i;
for(i = 0; i < ehdr.e_shnum; i++) {
if (shdr[i].sh_type != SHT_STRTAB) {
continue;
}
strtab[i] = malloc(shdr[i].sh_size);
if (!strtab[i]) {
die("malloc of %d bytes for strtab failed\n",
shdr[i].sh_size);
}
if (fseek(fp, shdr[i].sh_offset, SEEK_SET) < 0) {
die("Seek to %d failed: %s\n",
shdr[i].sh_offset, strerror(errno));
}
if (fread(strtab[i], 1, shdr[i].sh_size, fp) != shdr[i].sh_size) {
die("Cannot read symbol table: %s\n",
strerror(errno));
}
}
}
static void read_symtabs(FILE *fp)
{
int i,j;
for(i = 0; i < ehdr.e_shnum; i++) {
if (shdr[i].sh_type != SHT_SYMTAB) {
continue;
}
symtab[i] = malloc(shdr[i].sh_size);
if (!symtab[i]) {
die("malloc of %d bytes for symtab failed\n",
shdr[i].sh_size);
}
if (fseek(fp, shdr[i].sh_offset, SEEK_SET) < 0) {
die("Seek to %d failed: %s\n",
shdr[i].sh_offset, strerror(errno));
}
if (fread(symtab[i], 1, shdr[i].sh_size, fp) != shdr[i].sh_size) {
die("Cannot read symbol table: %s\n",
strerror(errno));
}
for(j = 0; j < shdr[i].sh_size/sizeof(symtab[i][0]); j++) {
symtab[i][j].st_name = elf32_to_cpu(symtab[i][j].st_name);
symtab[i][j].st_value = elf32_to_cpu(symtab[i][j].st_value);
symtab[i][j].st_size = elf32_to_cpu(symtab[i][j].st_size);
symtab[i][j].st_shndx = elf16_to_cpu(symtab[i][j].st_shndx);
}
}
}
static void read_relocs(FILE *fp)
{
int i,j;
for(i = 0; i < ehdr.e_shnum; i++) {
if (shdr[i].sh_type != SHT_REL) {
continue;
}
reltab[i] = malloc(shdr[i].sh_size);
if (!reltab[i]) {
die("malloc of %d bytes for relocs failed\n",
shdr[i].sh_size);
}
if (fseek(fp, shdr[i].sh_offset, SEEK_SET) < 0) {
die("Seek to %d failed: %s\n",
shdr[i].sh_offset, strerror(errno));
}
if (fread(reltab[i], 1, shdr[i].sh_size, fp) != shdr[i].sh_size) {
die("Cannot read symbol table: %s\n",
strerror(errno));
}
for(j = 0; j < shdr[i].sh_size/sizeof(reltab[0][0]); j++) {
reltab[i][j].r_offset = elf32_to_cpu(reltab[i][j].r_offset);
reltab[i][j].r_info = elf32_to_cpu(reltab[i][j].r_info);
}
}
}
static void print_absolute_symbols(void)
{
int i;
printf("Absolute symbols\n");
printf(" Num: Value Size Type Bind Visibility Name\n");
for(i = 0; i < ehdr.e_shnum; i++) {
char *sym_strtab;
Elf32_Sym *sh_symtab;
int j;
if (shdr[i].sh_type != SHT_SYMTAB) {
continue;
}
sh_symtab = symtab[i];
sym_strtab = strtab[shdr[i].sh_link];
for(j = 0; j < shdr[i].sh_size/sizeof(symtab[0][0]); j++) {
Elf32_Sym *sym;
const char *name;
sym = &symtab[i][j];
name = sym_name(sym_strtab, sym);
if (sym->st_shndx != SHN_ABS) {
continue;
}
printf("%5d %08x %5d %10s %10s %12s %s\n",
j, sym->st_value, sym->st_size,
sym_type(ELF32_ST_TYPE(sym->st_info)),
sym_bind(ELF32_ST_BIND(sym->st_info)),
sym_visibility(ELF32_ST_VISIBILITY(sym->st_other)),
name);
}
}
printf("\n");
}
static void print_absolute_relocs(void)
{
int i, printed = 0;
for(i = 0; i < ehdr.e_shnum; i++) {
char *sym_strtab;
Elf32_Sym *sh_symtab;
unsigned sec_applies, sec_symtab;
int j;
if (shdr[i].sh_type != SHT_REL) {
continue;
}
sec_symtab = shdr[i].sh_link;
sec_applies = shdr[i].sh_info;
if (!(shdr[sec_applies].sh_flags & SHF_ALLOC)) {
continue;
}
sh_symtab = symtab[sec_symtab];
sym_strtab = strtab[shdr[sec_symtab].sh_link];
for(j = 0; j < shdr[i].sh_size/sizeof(reltab[0][0]); j++) {
Elf32_Rel *rel;
Elf32_Sym *sym;
const char *name;
rel = &reltab[i][j];
sym = &sh_symtab[ELF32_R_SYM(rel->r_info)];
name = sym_name(sym_strtab, sym);
if (sym->st_shndx != SHN_ABS) {
continue;
}
/* Absolute symbols are not relocated if bzImage is
* loaded at a non-compiled address. Display a warning
* to user at compile time about the absolute
* relocations present.
*
* User need to audit the code to make sure
* some symbols which should have been section
* relative have not become absolute because of some
* linker optimization or wrong programming usage.
*
* Before warning check if this absolute symbol
* relocation is harmless.
*/
if (is_safe_abs_reloc(name))
continue;
if (!printed) {
printf("WARNING: Absolute relocations"
" present\n");
printf("Offset Info Type Sym.Value "
"Sym.Name\n");
printed = 1;
}
printf("%08x %08x %10s %08x %s\n",
rel->r_offset,
rel->r_info,
rel_type(ELF32_R_TYPE(rel->r_info)),
sym->st_value,
name);
}
}
if (printed)
printf("\n");
}
static void walk_relocs(void (*visit)(Elf32_Rel *rel, Elf32_Sym *sym))
{
int i;
/* Walk through the relocations */
for(i = 0; i < ehdr.e_shnum; i++) {
char *sym_strtab;
Elf32_Sym *sh_symtab;
unsigned sec_applies, sec_symtab;
int j;
if (shdr[i].sh_type != SHT_REL) {
continue;
}
sec_symtab = shdr[i].sh_link;
sec_applies = shdr[i].sh_info;
if (!(shdr[sec_applies].sh_flags & SHF_ALLOC)) {
continue;
}
sh_symtab = symtab[sec_symtab];
sym_strtab = strtab[shdr[sec_symtab].sh_link];
for(j = 0; j < shdr[i].sh_size/sizeof(reltab[0][0]); j++) {
Elf32_Rel *rel;
Elf32_Sym *sym;
unsigned r_type;
rel = &reltab[i][j];
sym = &sh_symtab[ELF32_R_SYM(rel->r_info)];
r_type = ELF32_R_TYPE(rel->r_info);
/* Don't visit relocations to absolute symbols */
if (sym->st_shndx == SHN_ABS) {
continue;
}
if (r_type == R_386_PC32) {
/* PC relative relocations don't need to be adjusted */
}
else if (r_type == R_386_32) {
/* Visit relocations that need to be adjusted */
visit(rel, sym);
}
else {
die("Unsupported relocation type: %d\n", r_type);
}
}
}
}
static void count_reloc(Elf32_Rel *rel, Elf32_Sym *sym)
{
reloc_count += 1;
}
static void collect_reloc(Elf32_Rel *rel, Elf32_Sym *sym)
{
/* Remember the address that needs to be adjusted. */
relocs[reloc_idx++] = rel->r_offset;
}
static int cmp_relocs(const void *va, const void *vb)
{
const unsigned long *a, *b;
a = va; b = vb;
return (*a == *b)? 0 : (*a > *b)? 1 : -1;
}
static void emit_relocs(int as_text)
{
int i;
/* Count how many relocations I have and allocate space for them. */
reloc_count = 0;
walk_relocs(count_reloc);
relocs = malloc(reloc_count * sizeof(relocs[0]));
if (!relocs) {
die("malloc of %d entries for relocs failed\n",
reloc_count);
}
/* Collect up the relocations */
reloc_idx = 0;
walk_relocs(collect_reloc);
/* Order the relocations for more efficient processing */
qsort(relocs, reloc_count, sizeof(relocs[0]), cmp_relocs);
/* Print the relocations */
if (as_text) {
/* Print the relocations in a form suitable that
* gas will like.
*/
printf(".section \".data.reloc\",\"a\"\n");
printf(".balign 4\n");
for(i = 0; i < reloc_count; i++) {
printf("\t .long 0x%08lx\n", relocs[i]);
}
printf("\n");
}
else {
unsigned char buf[4];
buf[0] = buf[1] = buf[2] = buf[3] = 0;
/* Print a stop */
printf("%c%c%c%c", buf[0], buf[1], buf[2], buf[3]);
/* Now print each relocation */
for(i = 0; i < reloc_count; i++) {
buf[0] = (relocs[i] >> 0) & 0xff;
buf[1] = (relocs[i] >> 8) & 0xff;
buf[2] = (relocs[i] >> 16) & 0xff;
buf[3] = (relocs[i] >> 24) & 0xff;
printf("%c%c%c%c", buf[0], buf[1], buf[2], buf[3]);
}
}
}
static void usage(void)
{
die("relocs [--abs-syms |--abs-relocs | --text] vmlinux\n");
}
int main(int argc, char **argv)
{
int show_absolute_syms, show_absolute_relocs;
int as_text;
const char *fname;
FILE *fp;
int i;
show_absolute_syms = 0;
show_absolute_relocs = 0;
as_text = 0;
fname = NULL;
for(i = 1; i < argc; i++) {
char *arg = argv[i];
if (*arg == '-') {
if (strcmp(argv[1], "--abs-syms") == 0) {
show_absolute_syms = 1;
continue;
}
if (strcmp(argv[1], "--abs-relocs") == 0) {
show_absolute_relocs = 1;
continue;
}
else if (strcmp(argv[1], "--text") == 0) {
as_text = 1;
continue;
}
}
else if (!fname) {
fname = arg;
continue;
}
usage();
}
if (!fname) {
usage();
}
fp = fopen(fname, "r");
if (!fp) {
die("Cannot open %s: %s\n",
fname, strerror(errno));
}
read_ehdr(fp);
read_shdrs(fp);
read_strtabs(fp);
read_symtabs(fp);
read_relocs(fp);
if (show_absolute_syms) {
print_absolute_symbols();
return 0;
}
if (show_absolute_relocs) {
print_absolute_relocs();
return 0;
}
emit_relocs(as_text);
return 0;
}
arch/i386/boot/compressed/vmlinux.lds 0 → 100644
浏览文件 @ 4522d582
OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
OUTPUT_ARCH(i386)
ENTRY(startup_32)
SECTIONS
{
/* Be careful parts of head.S assume startup_32 is at
* address 0.
*/
. = 0 ;
.text.head : {
_head = . ;
*(.text.head)
_ehead = . ;
}
.data.compressed : {
*(.data.compressed)
}
.text : {
_text = .; /* Text */
*(.text)
*(.text.*)
_etext = . ;
}
.rodata : {
_rodata = . ;
*(.rodata) /* read-only data */
*(.rodata.*)
_erodata = . ;
}
.data : {
_data = . ;
*(.data)
*(.data.*)
_edata = . ;
}
.bss : {
_bss = . ;
*(.bss)
*(.bss.*)
*(COMMON)
_end = . ;
}
}
arch/i386/boot/compressed/vmlinux.scr
浏览文件 @ 4522d582
SECTIONS
{
.data : {
.data.compressed : {
input_len = .;
LONG(input_data_end - input_data) input_data = .;
*(.data)
output_len = . - 4;
input_data_end = .;
}
}
arch/i386/boot/setup.S
浏览文件 @ 4522d582
......@@ -81,7 +81,7 @@ start:
# This is the setup header, and it must start at %cs:2 (old 0x9020:2)
.ascii "HdrS" # header signature
.word 0x0204 # header version number (>= 0x0105)
.word 0x0205 # header version number (>= 0x0105)
# or else old loadlin-1.5 will fail)
realmode_swtch: .word 0, 0 # default_switch, SETUPSEG
start_sys_seg: .word SYSSEG
......@@ -160,6 +160,17 @@ ramdisk_max: .long (-__PAGE_OFFSET-(512 << 20)-1) & 0x7fffffff
# The highest safe address for
# the contents of an initrd
kernel_alignment: .long CONFIG_PHYSICAL_ALIGN #physical addr alignment
#required for protected mode
#kernel
#ifdef CONFIG_RELOCATABLE
relocatable_kernel: .byte 1
#else
relocatable_kernel: .byte 0
#endif
pad2: .byte 0
pad3: .word 0
trampoline: call start_of_setup
.align 16
# The offset at this point is 0x240
......@@ -588,11 +599,6 @@ rmodeswtch_normal:
call default_switch
rmodeswtch_end:
# we get the code32 start address and modify the below 'jmpi'
# (loader may have changed it)
movl %cs:code32_start, %eax
movl %eax, %cs:code32
# Now we move the system to its rightful place ... but we check if we have a
# big-kernel. In that case we *must* not move it ...
testb $LOADED_HIGH, %cs:loadflags
......@@ -788,11 +794,12 @@ a20_err_msg:
a20_done:
#endif /* CONFIG_X86_VOYAGER */
# set up gdt and idt
# set up gdt and idt and 32bit start address
lidt idt_48 # load idt with 0,0
xorl %eax, %eax # Compute gdt_base
movw %ds, %ax # (Convert %ds:gdt to a linear ptr)
shll $4, %eax
addl %eax, code32
addl $gdt, %eax
movl %eax, (gdt_48+2)
lgdt gdt_48 # load gdt with whatever is
......@@ -851,9 +858,26 @@ flush_instr:
# Manual, Mixing 16-bit and 32-bit code, page 16-6)
.byte 0x66, 0xea # prefix + jmpi-opcode
code32: .long 0x1000 # will be set to 0x100000
# for big kernels
code32: .long startup_32 # will be set to %cs+startup_32
.word __BOOT_CS
.code32
startup_32:
movl $(__BOOT_DS), %eax
movl %eax, %ds
movl %eax, %es
movl %eax, %fs
movl %eax, %gs
movl %eax, %ss
xorl %eax, %eax
1: incl %eax # check that A20 really IS enabled
movl %eax, 0x00000000 # loop forever if it isn't
cmpl %eax, 0x00100000
je 1b
# Jump to the 32bit entry point
jmpl *(code32_start - start + (DELTA_INITSEG << 4))(%esi)
.code16
# Here's a bunch of information about your current kernel..
kernel_version: .ascii UTS_RELEASE
......
arch/i386/defconfig
浏览文件 @ 4522d582
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.19-rc2-git4
# Sat Oct 21 03:38:56 2006
# Linux kernel version: 2.6.19-git7
# Wed Dec 6 23:50:49 2006
#
CONFIG_X86_32=y
CONFIG_GENERIC_TIME=y
......@@ -40,13 +40,14 @@ CONFIG_POSIX_MQUEUE=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
# CONFIG_CPUSETS is not set
CONFIG_SYSFS_DEPRECATED=y
# CONFIG_RELAY is not set
CONFIG_INITRAMFS_SOURCE=""
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
# CONFIG_EMBEDDED is not set
CONFIG_UID16=y
# CONFIG_SYSCTL_SYSCALL is not set
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
......@@ -110,6 +111,7 @@ CONFIG_SMP=y
# CONFIG_X86_VISWS is not set
CONFIG_X86_GENERICARCH=y
# CONFIG_X86_ES7000 is not set
# CONFIG_PARAVIRT is not set
CONFIG_X86_CYCLONE_TIMER=y
# CONFIG_M386 is not set
# CONFIG_M486 is not set
......@@ -120,6 +122,7 @@ CONFIG_X86_CYCLONE_TIMER=y
# CONFIG_MPENTIUMII is not set
CONFIG_MPENTIUMIII=y
# CONFIG_MPENTIUMM is not set
# CONFIG_MCORE2 is not set
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
......@@ -197,7 +200,6 @@ CONFIG_RESOURCES_64BIT=y
CONFIG_MTRR=y
# CONFIG_EFI is not set
# CONFIG_IRQBALANCE is not set
CONFIG_REGPARM=y
CONFIG_SECCOMP=y
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
......@@ -205,7 +207,8 @@ CONFIG_HZ_250=y
CONFIG_HZ=250
# CONFIG_KEXEC is not set
# CONFIG_CRASH_DUMP is not set
CONFIG_PHYSICAL_START=0x100000
# CONFIG_RELOCATABLE is not set
CONFIG_PHYSICAL_ALIGN=0x100000
# CONFIG_HOTPLUG_CPU is not set
CONFIG_COMPAT_VDSO=y
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
......@@ -367,6 +370,7 @@ CONFIG_INET_TCP_DIAG=y
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
CONFIG_IPV6=y
# CONFIG_IPV6_PRIVACY is not set
# CONFIG_IPV6_ROUTER_PREF is not set
......@@ -677,6 +681,7 @@ CONFIG_SATA_INTEL_COMBINED=y
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_JMICRON is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_NETCELL is not set
......@@ -850,6 +855,7 @@ CONFIG_BNX2=y
# CONFIG_IXGB is not set
# CONFIG_S2IO is not set
# CONFIG_MYRI10GE is not set
# CONFIG_NETXEN_NIC is not set
#
# Token Ring devices
......@@ -984,10 +990,6 @@ CONFIG_RTC=y
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
# CONFIG_SONYPI is not set
#
# Ftape, the floppy tape device driver
#
CONFIG_AGP=y
# CONFIG_AGP_ALI is not set
# CONFIG_AGP_ATI is not set
......@@ -1108,6 +1110,7 @@ CONFIG_USB_DEVICEFS=y
# CONFIG_USB_BANDWIDTH is not set
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_SUSPEND is not set
# CONFIG_USB_MULTITHREAD_PROBE is not set
# CONFIG_USB_OTG is not set
#
......@@ -1185,6 +1188,7 @@ CONFIG_USB_HIDINPUT=y
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_USBNET_MII is not set
# CONFIG_USB_USBNET is not set
CONFIG_USB_MON=y
......
arch/i386/kernel/Makefile
浏览文件 @ 4522d582
......@@ -6,7 +6,7 @@ extra-y := head.o init_task.o vmlinux.lds
obj-y := process.o signal.o entry.o traps.o irq.o \
ptrace.o time.o ioport.o ldt.o setup.o i8259.o sys_i386.o \
pci-dma.o i386_ksyms.o i387.o bootflag.o \
pci-dma.o i386_ksyms.o i387.o bootflag.o e820.o\
quirks.o i8237.o topology.o alternative.o i8253.o tsc.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
......@@ -40,6 +40,9 @@ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_HPET_TIMER) += hpet.o
obj-$(CONFIG_K8_NB) += k8.o
# Make sure this is linked after any other paravirt_ops structs: see head.S
obj-$(CONFIG_PARAVIRT) += paravirt.o
EXTRA_AFLAGS := -traditional
obj-$(CONFIG_SCx200) += scx200.o
......
arch/i386/kernel/acpi/earlyquirk.c
浏览文件 @ 4522d582
......@@ -10,6 +10,7 @@
#include <asm/pci-direct.h>
#include <asm/acpi.h>
#include <asm/apic.h>
#include <asm/irq.h>
#ifdef CONFIG_ACPI
......@@ -49,6 +50,24 @@ static int __init check_bridge(int vendor, int device)
return 0;
}
static void check_intel(void)
{
u16 vendor, device;
vendor = read_pci_config_16(0, 0, 0, PCI_VENDOR_ID);
if (vendor != PCI_VENDOR_ID_INTEL)
return;
device = read_pci_config_16(0, 0, 0, PCI_DEVICE_ID);
#ifdef CONFIG_SMP
if (device == PCI_DEVICE_ID_INTEL_E7320_MCH ||
device == PCI_DEVICE_ID_INTEL_E7520_MCH ||
device == PCI_DEVICE_ID_INTEL_E7525_MCH)
quirk_intel_irqbalance();
#endif
}
void __init check_acpi_pci(void)
{
int num, slot, func;
......@@ -60,6 +79,8 @@ void __init check_acpi_pci(void)
if (!early_pci_allowed())
return;
check_intel();
/* Poor man's PCI discovery */
for (num = 0; num < 32; num++) {
for (slot = 0; slot < 32; slot++) {
......
arch/i386/kernel/alternative.c
浏览文件 @ 4522d582
......@@ -124,6 +124,20 @@ static unsigned char** find_nop_table(void)
#endif /* CONFIG_X86_64 */
static void nop_out(void *insns, unsigned int len)
{
unsigned char **noptable = find_nop_table();
while (len > 0) {
unsigned int noplen = len;
if (noplen > ASM_NOP_MAX)
noplen = ASM_NOP_MAX;
memcpy(insns, noptable[noplen], noplen);
insns += noplen;
len -= noplen;
}
}
extern struct alt_instr __alt_instructions[], __alt_instructions_end[];
extern struct alt_instr __smp_alt_instructions[], __smp_alt_instructions_end[];
extern u8 *__smp_locks[], *__smp_locks_end[];
......@@ -138,10 +152,9 @@ extern u8 __smp_alt_begin[], __smp_alt_end[];
void apply_alternatives(struct alt_instr *start, struct alt_instr *end)
{
unsigned char **noptable = find_nop_table();
struct alt_instr *a;
u8 *instr;
int diff, i, k;
int diff;
DPRINTK("%s: alt table %p -> %p\n", __FUNCTION__, start, end);
for (a = start; a < end; a++) {
......@@ -159,13 +172,7 @@ void apply_alternatives(struct alt_instr *start, struct alt_instr *end)
#endif
memcpy(instr, a->replacement, a->replacementlen);
diff = a->instrlen - a->replacementlen;
/* Pad the rest with nops */
for (i = a->replacementlen; diff > 0; diff -= k, i += k) {
k = diff;
if (k > ASM_NOP_MAX)
k = ASM_NOP_MAX;
memcpy(a->instr + i, noptable[k], k);
}
nop_out(instr + a->replacementlen, diff);
}
}
......@@ -209,7 +216,6 @@ static void alternatives_smp_lock(u8 **start, u8 **end, u8 *text, u8 *text_end)
static void alternatives_smp_unlock(u8 **start, u8 **end, u8 *text, u8 *text_end)
{
unsigned char **noptable = find_nop_table();
u8 **ptr;
for (ptr = start; ptr < end; ptr++) {
......@@ -217,7 +223,7 @@ static void alternatives_smp_unlock(u8 **start, u8 **end, u8 *text, u8 *text_end
continue;
if (*ptr > text_end)
continue;
**ptr = noptable[1][0];
nop_out(*ptr, 1);
};
}
......@@ -343,6 +349,40 @@ void alternatives_smp_switch(int smp)
#endif
#ifdef CONFIG_PARAVIRT
void apply_paravirt(struct paravirt_patch *start, struct paravirt_patch *end)
{
struct paravirt_patch *p;
for (p = start; p < end; p++) {
unsigned int used;
used = paravirt_ops.patch(p->instrtype, p->clobbers, p->instr,
p->len);
#ifdef CONFIG_DEBUG_PARAVIRT
{
int i;
/* Deliberately clobber regs using "not %reg" to find bugs. */
for (i = 0; i < 3; i++) {
if (p->len - used >= 2 && (p->clobbers & (1 << i))) {
memcpy(p->instr + used, "\xf7\xd0", 2);
p->instr[used+1] |= i;
used += 2;
}
}
}
#endif
/* Pad the rest with nops */
nop_out(p->instr + used, p->len - used);
}
/* Sync to be conservative, in case we patched following instructions */
sync_core();
}
extern struct paravirt_patch __start_parainstructions[],
__stop_parainstructions[];
#endif /* CONFIG_PARAVIRT */
void __init alternative_instructions(void)
{
unsigned long flags;
......@@ -390,5 +430,6 @@ void __init alternative_instructions(void)
alternatives_smp_switch(0);
}
#endif
apply_paravirt(__start_parainstructions, __stop_parainstructions);
local_irq_restore(flags);
}
arch/i386/kernel/apic.c
浏览文件 @ 4522d582
......@@ -647,23 +647,30 @@ static struct {
static int lapic_suspend(struct sys_device *dev, pm_message_t state)
{
unsigned long flags;
int maxlvt;
if (!apic_pm_state.active)
return 0;
maxlvt = get_maxlvt();
apic_pm_state.apic_id = apic_read(APIC_ID);
apic_pm_state.apic_taskpri = apic_read(APIC_TASKPRI);
apic_pm_state.apic_ldr = apic_read(APIC_LDR);
apic_pm_state.apic_dfr = apic_read(APIC_DFR);
apic_pm_state.apic_spiv = apic_read(APIC_SPIV);
apic_pm_state.apic_lvtt = apic_read(APIC_LVTT);
apic_pm_state.apic_lvtpc = apic_read(APIC_LVTPC);
if (maxlvt >= 4)
apic_pm_state.apic_lvtpc = apic_read(APIC_LVTPC);
apic_pm_state.apic_lvt0 = apic_read(APIC_LVT0);
apic_pm_state.apic_lvt1 = apic_read(APIC_LVT1);
apic_pm_state.apic_lvterr = apic_read(APIC_LVTERR);
apic_pm_state.apic_tmict = apic_read(APIC_TMICT);
apic_pm_state.apic_tdcr = apic_read(APIC_TDCR);
apic_pm_state.apic_thmr = apic_read(APIC_LVTTHMR);
#ifdef CONFIG_X86_MCE_P4THERMAL
if (maxlvt >= 5)
apic_pm_state.apic_thmr = apic_read(APIC_LVTTHMR);
#endif
local_irq_save(flags);
disable_local_APIC();
......@@ -675,10 +682,13 @@ static int lapic_resume(struct sys_device *dev)
{
unsigned int l, h;
unsigned long flags;
int maxlvt;
if (!apic_pm_state.active)
return 0;
maxlvt = get_maxlvt();
local_irq_save(flags);
/*
......@@ -700,8 +710,12 @@ static int lapic_resume(struct sys_device *dev)
apic_write(APIC_SPIV, apic_pm_state.apic_spiv);
apic_write(APIC_LVT0, apic_pm_state.apic_lvt0);
apic_write(APIC_LVT1, apic_pm_state.apic_lvt1);
apic_write(APIC_LVTTHMR, apic_pm_state.apic_thmr);
apic_write(APIC_LVTPC, apic_pm_state.apic_lvtpc);
#ifdef CONFIG_X86_MCE_P4THERMAL
if (maxlvt >= 5)
apic_write(APIC_LVTTHMR, apic_pm_state.apic_thmr);
#endif
if (maxlvt >= 4)
apic_write(APIC_LVTPC, apic_pm_state.apic_lvtpc);
apic_write(APIC_LVTT, apic_pm_state.apic_lvtt);
apic_write(APIC_TDCR, apic_pm_state.apic_tdcr);
apic_write(APIC_TMICT, apic_pm_state.apic_tmict);
......
arch/i386/kernel/apm.c
浏览文件 @ 4522d582
......@@ -231,6 +231,7 @@
#include <asm/uaccess.h>
#include <asm/desc.h>
#include <asm/i8253.h>
#include <asm/paravirt.h>
#include "io_ports.h"
......@@ -2235,7 +2236,7 @@ static int __init apm_init(void)
dmi_check_system(apm_dmi_table);
if (apm_info.bios.version == 0) {
if (apm_info.bios.version == 0 || paravirt_enabled()) {
printk(KERN_INFO "apm: BIOS not found.\n");
return -ENODEV;
}
......
arch/i386/kernel/asm-offsets.c
浏览文件 @ 4522d582
......@@ -15,6 +15,7 @@
#include <asm/processor.h>
#include <asm/thread_info.h>
#include <asm/elf.h>
#include <asm/pda.h>
#define DEFINE(sym, val) \
asm volatile("\n->" #sym " %0 " #val : : "i" (val))
......@@ -51,13 +52,35 @@ void foo(void)
OFFSET(TI_exec_domain, thread_info, exec_domain);
OFFSET(TI_flags, thread_info, flags);
OFFSET(TI_status, thread_info, status);
OFFSET(TI_cpu, thread_info, cpu);
OFFSET(TI_preempt_count, thread_info, preempt_count);
OFFSET(TI_addr_limit, thread_info, addr_limit);
OFFSET(TI_restart_block, thread_info, restart_block);
OFFSET(TI_sysenter_return, thread_info, sysenter_return);
BLANK();
OFFSET(GDS_size, Xgt_desc_struct, size);
OFFSET(GDS_address, Xgt_desc_struct, address);
OFFSET(GDS_pad, Xgt_desc_struct, pad);
BLANK();
OFFSET(PT_EBX, pt_regs, ebx);
OFFSET(PT_ECX, pt_regs, ecx);
OFFSET(PT_EDX, pt_regs, edx);
OFFSET(PT_ESI, pt_regs, esi);
OFFSET(PT_EDI, pt_regs, edi);
OFFSET(PT_EBP, pt_regs, ebp);
OFFSET(PT_EAX, pt_regs, eax);
OFFSET(PT_DS, pt_regs, xds);
OFFSET(PT_ES, pt_regs, xes);
OFFSET(PT_GS, pt_regs, xgs);
OFFSET(PT_ORIG_EAX, pt_regs, orig_eax);
OFFSET(PT_EIP, pt_regs, eip);
OFFSET(PT_CS, pt_regs, xcs);
OFFSET(PT_EFLAGS, pt_regs, eflags);
OFFSET(PT_OLDESP, pt_regs, esp);
OFFSET(PT_OLDSS, pt_regs, xss);
BLANK();
OFFSET(EXEC_DOMAIN_handler, exec_domain, handler);
OFFSET(RT_SIGFRAME_sigcontext, rt_sigframe, uc.uc_mcontext);
BLANK();
......@@ -74,4 +97,18 @@ void foo(void)
DEFINE(VDSO_PRELINK, VDSO_PRELINK);
OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx);
BLANK();
OFFSET(PDA_cpu, i386_pda, cpu_number);
OFFSET(PDA_pcurrent, i386_pda, pcurrent);
#ifdef CONFIG_PARAVIRT
BLANK();
OFFSET(PARAVIRT_enabled, paravirt_ops, paravirt_enabled);
OFFSET(PARAVIRT_irq_disable, paravirt_ops, irq_disable);
OFFSET(PARAVIRT_irq_enable, paravirt_ops, irq_enable);
OFFSET(PARAVIRT_irq_enable_sysexit, paravirt_ops, irq_enable_sysexit);
OFFSET(PARAVIRT_iret, paravirt_ops, iret);
OFFSET(PARAVIRT_read_cr0, paravirt_ops, read_cr0);
#endif
}
arch/i386/kernel/cpu/amd.c
浏览文件 @ 4522d582
......@@ -104,10 +104,7 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
f_vide();
rdtscl(d2);
d = d2-d;
/* Knock these two lines out if it debugs out ok */
printk(KERN_INFO "AMD K6 stepping B detected - ");
/* -- cut here -- */
if (d > 20*K6_BUG_LOOP)
printk("system stability may be impaired when more than 32 MB are used.\n");
else
......
arch/i386/kernel/cpu/common.c
浏览文件 @ 4522d582
......@@ -18,14 +18,15 @@
#include <asm/apic.h>
#include <mach_apic.h>
#endif
#include <asm/pda.h>
#include "cpu.h"
DEFINE_PER_CPU(struct Xgt_desc_struct, cpu_gdt_descr);
EXPORT_PER_CPU_SYMBOL(cpu_gdt_descr);
DEFINE_PER_CPU(unsigned char, cpu_16bit_stack[CPU_16BIT_STACK_SIZE]);
EXPORT_PER_CPU_SYMBOL(cpu_16bit_stack);
struct i386_pda *_cpu_pda[NR_CPUS] __read_mostly;
EXPORT_SYMBOL(_cpu_pda);
static int cachesize_override __cpuinitdata = -1;
static int disable_x86_fxsr __cpuinitdata;
......@@ -235,29 +236,14 @@ static int __cpuinit have_cpuid_p(void)
return flag_is_changeable_p(X86_EFLAGS_ID);
}
/* Do minimum CPU detection early.
Fields really needed: vendor, cpuid_level, family, model, mask, cache alignment.
The others are not touched to avoid unwanted side effects.
WARNING: this function is only called on the BP. Don't add code here
that is supposed to run on all CPUs. */
static void __init early_cpu_detect(void)
void __init cpu_detect(struct cpuinfo_x86 *c)
{
struct cpuinfo_x86 *c = &boot_cpu_data;
c->x86_cache_alignment = 32;
if (!have_cpuid_p())
return;
/* Get vendor name */
cpuid(0x00000000, &c->cpuid_level,
(int *)&c->x86_vendor_id[0],
(int *)&c->x86_vendor_id[8],
(int *)&c->x86_vendor_id[4]);
get_cpu_vendor(c, 1);
c->x86 = 4;
if (c->cpuid_level >= 0x00000001) {
u32 junk, tfms, cap0, misc;
......@@ -274,6 +260,26 @@ static void __init early_cpu_detect(void)
}
}
/* Do minimum CPU detection early.
Fields really needed: vendor, cpuid_level, family, model, mask, cache alignment.
The others are not touched to avoid unwanted side effects.
WARNING: this function is only called on the BP. Don't add code here
that is supposed to run on all CPUs. */
static void __init early_cpu_detect(void)
{
struct cpuinfo_x86 *c = &boot_cpu_data;
c->x86_cache_alignment = 32;
if (!have_cpuid_p())
return;
cpu_detect(c);
get_cpu_vendor(c, 1);
}
static void __cpuinit generic_identify(struct cpuinfo_x86 * c)
{
u32 tfms, xlvl;
......@@ -308,6 +314,8 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 * c)
#else
c->apicid = (ebx >> 24) & 0xFF;
#endif
if (c->x86_capability[0] & (1<<19))
c->x86_clflush_size = ((ebx >> 8) & 0xff) * 8;
} else {
/* Have CPUID level 0 only - unheard of */
c->x86 = 4;
......@@ -372,6 +380,7 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
c->x86_vendor_id[0] = '\0'; /* Unset */
c->x86_model_id[0] = '\0'; /* Unset */
c->x86_max_cores = 1;
c->x86_clflush_size = 32;
memset(&c->x86_capability, 0, sizeof c->x86_capability);
if (!have_cpuid_p()) {
......@@ -591,42 +600,24 @@ void __init early_cpu_init(void)
disable_pse = 1;
#endif
}
/*
* cpu_init() initializes state that is per-CPU. Some data is already
* initialized (naturally) in the bootstrap process, such as the GDT
* and IDT. We reload them nevertheless, this function acts as a
* 'CPU state barrier', nothing should get across.
*/
void __cpuinit cpu_init(void)
/* Make sure %gs is initialized properly in idle threads */
struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
{
int cpu = smp_processor_id();
struct tss_struct * t = &per_cpu(init_tss, cpu);
struct thread_struct *thread = &current->thread;
struct desc_struct *gdt;
__u32 stk16_off = (__u32)&per_cpu(cpu_16bit_stack, cpu);
struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
memset(regs, 0, sizeof(struct pt_regs));
regs->xgs = __KERNEL_PDA;
return regs;
}
if (cpu_test_and_set(cpu, cpu_initialized)) {
printk(KERN_WARNING "CPU#%d already initialized!\n", cpu);
for (;;) local_irq_enable();
}
printk(KERN_INFO "Initializing CPU#%d\n", cpu);
static __cpuinit int alloc_gdt(int cpu)
{
struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
struct desc_struct *gdt;
struct i386_pda *pda;
if (cpu_has_vme || cpu_has_tsc || cpu_has_de)
clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
if (tsc_disable && cpu_has_tsc) {
printk(KERN_NOTICE "Disabling TSC...\n");
/**** FIX-HPA: DOES THIS REALLY BELONG HERE? ****/
clear_bit(X86_FEATURE_TSC, boot_cpu_data.x86_capability);
set_in_cr4(X86_CR4_TSD);
}
gdt = (struct desc_struct *)cpu_gdt_descr->address;
pda = cpu_pda(cpu);
/* The CPU hotplug case */
if (cpu_gdt_descr->address) {
gdt = (struct desc_struct *)cpu_gdt_descr->address;
memset(gdt, 0, PAGE_SIZE);
goto old_gdt;
}
/*
* This is a horrible hack to allocate the GDT. The problem
* is that cpu_init() is called really early for the boot CPU
......@@ -634,43 +625,130 @@ void __cpuinit cpu_init(void)
* CPUs, when bootmem will have gone away
*/
if (NODE_DATA(0)->bdata->node_bootmem_map) {
gdt = (struct desc_struct *)alloc_bootmem_pages(PAGE_SIZE);
/* alloc_bootmem_pages panics on failure, so no check */
BUG_ON(gdt != NULL || pda != NULL);
gdt = alloc_bootmem_pages(PAGE_SIZE);
pda = alloc_bootmem(sizeof(*pda));
/* alloc_bootmem(_pages) panics on failure, so no check */
memset(gdt, 0, PAGE_SIZE);
memset(pda, 0, sizeof(*pda));
} else {
gdt = (struct desc_struct *)get_zeroed_page(GFP_KERNEL);
if (unlikely(!gdt)) {
printk(KERN_CRIT "CPU%d failed to allocate GDT\n", cpu);
for (;;)
local_irq_enable();
/* GDT and PDA might already have been allocated if
this is a CPU hotplug re-insertion. */
if (gdt == NULL)
gdt = (struct desc_struct *)get_zeroed_page(GFP_KERNEL);
if (pda == NULL)
pda = kmalloc_node(sizeof(*pda), GFP_KERNEL, cpu_to_node(cpu));
if (unlikely(!gdt || !pda)) {
free_pages((unsigned long)gdt, 0);
kfree(pda);
return 0;
}
}
old_gdt:
cpu_gdt_descr->address = (unsigned long)gdt;
cpu_pda(cpu) = pda;
return 1;
}
/* Initial PDA used by boot CPU */
struct i386_pda boot_pda = {
._pda = &boot_pda,
.cpu_number = 0,
.pcurrent = &init_task,
};
static inline void set_kernel_gs(void)
{
/* Set %gs for this CPU's PDA. Memory clobber is to create a
barrier with respect to any PDA operations, so the compiler
doesn't move any before here. */
asm volatile ("mov %0, %%gs" : : "r" (__KERNEL_PDA) : "memory");
}
/* Initialize the CPU's GDT and PDA. The boot CPU does this for
itself, but secondaries find this done for them. */
__cpuinit int init_gdt(int cpu, struct task_struct *idle)
{
struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
struct desc_struct *gdt;
struct i386_pda *pda;
/* For non-boot CPUs, the GDT and PDA should already have been
allocated. */
if (!alloc_gdt(cpu)) {
printk(KERN_CRIT "CPU%d failed to allocate GDT or PDA\n", cpu);
return 0;
}
gdt = (struct desc_struct *)cpu_gdt_descr->address;
pda = cpu_pda(cpu);
BUG_ON(gdt == NULL || pda == NULL);
/*
* Initialize the per-CPU GDT with the boot GDT,
* and set up the GDT descriptor:
*/
memcpy(gdt, cpu_gdt_table, GDT_SIZE);
cpu_gdt_descr->size = GDT_SIZE - 1;
/* Set up GDT entry for 16bit stack */
*(__u64 *)(&gdt[GDT_ENTRY_ESPFIX_SS]) |=
((((__u64)stk16_off) << 16) & 0x000000ffffff0000ULL) |
((((__u64)stk16_off) << 32) & 0xff00000000000000ULL) |
(CPU_16BIT_STACK_SIZE - 1);
pack_descriptor((u32 *)&gdt[GDT_ENTRY_PDA].a,
(u32 *)&gdt[GDT_ENTRY_PDA].b,
(unsigned long)pda, sizeof(*pda) - 1,
0x80 | DESCTYPE_S | 0x2, 0); /* present read-write data segment */
cpu_gdt_descr->size = GDT_SIZE - 1;
cpu_gdt_descr->address = (unsigned long)gdt;
memset(pda, 0, sizeof(*pda));
pda->_pda = pda;
pda->cpu_number = cpu;
pda->pcurrent = idle;
return 1;
}
/* Common CPU init for both boot and secondary CPUs */
static void __cpuinit _cpu_init(int cpu, struct task_struct *curr)
{
struct tss_struct * t = &per_cpu(init_tss, cpu);
struct thread_struct *thread = &curr->thread;
struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
/* Reinit these anyway, even if they've already been done (on
the boot CPU, this will transition from the boot gdt+pda to
the real ones). */
load_gdt(cpu_gdt_descr);
set_kernel_gs();
if (cpu_test_and_set(cpu, cpu_initialized)) {
printk(KERN_WARNING "CPU#%d already initialized!\n", cpu);
for (;;) local_irq_enable();
}
printk(KERN_INFO "Initializing CPU#%d\n", cpu);
if (cpu_has_vme || cpu_has_tsc || cpu_has_de)
clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
if (tsc_disable && cpu_has_tsc) {
printk(KERN_NOTICE "Disabling TSC...\n");
/**** FIX-HPA: DOES THIS REALLY BELONG HERE? ****/
clear_bit(X86_FEATURE_TSC, boot_cpu_data.x86_capability);
set_in_cr4(X86_CR4_TSD);
}
load_idt(&idt_descr);
/*
* Set up and load the per-CPU TSS and LDT
*/
atomic_inc(&init_mm.mm_count);
current->active_mm = &init_mm;
BUG_ON(current->mm);
enter_lazy_tlb(&init_mm, current);
curr->active_mm = &init_mm;
if (curr->mm)
BUG();
enter_lazy_tlb(&init_mm, curr);
load_esp0(t, thread);
set_tss_desc(cpu,t);
......@@ -682,8 +760,8 @@ void __cpuinit cpu_init(void)
__set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss);
#endif
/* Clear %fs and %gs. */
asm volatile ("movl %0, %%fs; movl %0, %%gs" : : "r" (0));
/* Clear %fs. */
asm volatile ("mov %0, %%fs" : : "r" (0));
/* Clear all 6 debug registers: */
set_debugreg(0, 0);
......@@ -701,6 +779,37 @@ void __cpuinit cpu_init(void)
mxcsr_feature_mask_init();
}
/* Entrypoint to initialize secondary CPU */
void __cpuinit secondary_cpu_init(void)
{
int cpu = smp_processor_id();
struct task_struct *curr = current;
_cpu_init(cpu, curr);
}
/*
* cpu_init() initializes state that is per-CPU. Some data is already
* initialized (naturally) in the bootstrap process, such as the GDT
* and IDT. We reload them nevertheless, this function acts as a
* 'CPU state barrier', nothing should get across.
*/
void __cpuinit cpu_init(void)
{
int cpu = smp_processor_id();
struct task_struct *curr = current;
/* Set up the real GDT and PDA, so we can transition from the
boot versions. */
if (!init_gdt(cpu, curr)) {
/* failed to allocate something; not much we can do... */
for (;;)
local_irq_enable();
}
_cpu_init(cpu, curr);
}
#ifdef CONFIG_HOTPLUG_CPU
void __cpuinit cpu_uninit(void)
{
......
arch/i386/kernel/cpu/intel.c
浏览文件 @ 4522d582
......@@ -107,7 +107,7 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
* Note that the workaround only should be initialized once...
*/
c->f00f_bug = 0;
if ( c->x86 == 5 ) {
if (!paravirt_enabled() && c->x86 == 5) {
static int f00f_workaround_enabled = 0;
c->f00f_bug = 1;
......@@ -195,8 +195,16 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
(c->x86 == 0x6 && c->x86_model >= 0x0e))
set_bit(X86_FEATURE_CONSTANT_TSC, c->x86_capability);
}
if (cpu_has_ds) {
unsigned int l1;
rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
if (!(l1 & (1<<11)))
set_bit(X86_FEATURE_BTS, c->x86_capability);
if (!(l1 & (1<<12)))
set_bit(X86_FEATURE_PEBS, c->x86_capability);
}
}
static unsigned int __cpuinit intel_size_cache(struct cpuinfo_x86 * c, unsigned int size)
{
......
arch/i386/kernel/cpu/intel_cacheinfo.c
浏览文件 @ 4522d582
......@@ -480,12 +480,10 @@ static int __cpuinit detect_cache_attributes(unsigned int cpu)
if (num_cache_leaves == 0)
return -ENOENT;
cpuid4_info[cpu] = kmalloc(
cpuid4_info[cpu] = kzalloc(
sizeof(struct _cpuid4_info) * num_cache_leaves, GFP_KERNEL);
if (unlikely(cpuid4_info[cpu] == NULL))
return -ENOMEM;
memset(cpuid4_info[cpu], 0,
sizeof(struct _cpuid4_info) * num_cache_leaves);
oldmask = current->cpus_allowed;
retval = set_cpus_allowed(current, cpumask_of_cpu(cpu));
......@@ -658,17 +656,14 @@ static int __cpuinit cpuid4_cache_sysfs_init(unsigned int cpu)
return -ENOENT;
/* Allocate all required memory */
cache_kobject[cpu] = kmalloc(sizeof(struct kobject), GFP_KERNEL);
cache_kobject[cpu] = kzalloc(sizeof(struct kobject), GFP_KERNEL);
if (unlikely(cache_kobject[cpu] == NULL))
goto err_out;
memset(cache_kobject[cpu], 0, sizeof(struct kobject));
index_kobject[cpu] = kmalloc(
index_kobject[cpu] = kzalloc(
sizeof(struct _index_kobject ) * num_cache_leaves, GFP_KERNEL);
if (unlikely(index_kobject[cpu] == NULL))
goto err_out;
memset(index_kobject[cpu], 0,
sizeof(struct _index_kobject) * num_cache_leaves);
return 0;
......
arch/i386/kernel/cpu/mtrr/Makefile
浏览文件 @ 4522d582
obj-y := main.o if.o generic.o state.o
obj-y += amd.o
obj-y += cyrix.o
obj-y += centaur.o
obj-$(CONFIG_X86_32) += amd.o cyrix.o centaur.o
arch/i386/kernel/cpu/mtrr/amd.c
浏览文件 @ 4522d582
......@@ -7,7 +7,7 @@
static void
amd_get_mtrr(unsigned int reg, unsigned long *base,
unsigned int *size, mtrr_type * type)
unsigned long *size, mtrr_type * type)
{
unsigned long low, high;
......
arch/i386/kernel/cpu/mtrr/centaur.c
浏览文件 @ 4522d582
......@@ -17,7 +17,7 @@ static u8 centaur_mcr_type; /* 0 for winchip, 1 for winchip2 */
*/
static int
centaur_get_free_region(unsigned long base, unsigned long size)
centaur_get_free_region(unsigned long base, unsigned long size, int replace_reg)
/* [SUMMARY] Get a free MTRR.
<base> The starting (base) address of the region.
<size> The size (in bytes) of the region.
......@@ -26,10 +26,11 @@ centaur_get_free_region(unsigned long base, unsigned long size)
{
int i, max;
mtrr_type ltype;
unsigned long lbase;
unsigned int lsize;
unsigned long lbase, lsize;
max = num_var_ranges;
if (replace_reg >= 0 && replace_reg < max)
return replace_reg;
for (i = 0; i < max; ++i) {
if (centaur_mcr_reserved & (1 << i))
continue;
......@@ -49,7 +50,7 @@ mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi)
static void
centaur_get_mcr(unsigned int reg, unsigned long *base,
unsigned int *size, mtrr_type * type)
unsigned long *size, mtrr_type * type)
{
*base = centaur_mcr[reg].high >> PAGE_SHIFT;
*size = -(centaur_mcr[reg].low & 0xfffff000) >> PAGE_SHIFT;
......
arch/i386/kernel/cpu/mtrr/cyrix.c
浏览文件 @ 4522d582
......@@ -9,7 +9,7 @@ int arr3_protected;
static void
cyrix_get_arr(unsigned int reg, unsigned long *base,
unsigned int *size, mtrr_type * type)
unsigned long *size, mtrr_type * type)
{
unsigned long flags;
unsigned char arr, ccr3, rcr, shift;
......@@ -77,7 +77,7 @@ cyrix_get_arr(unsigned int reg, unsigned long *base,
}
static int
cyrix_get_free_region(unsigned long base, unsigned long size)
cyrix_get_free_region(unsigned long base, unsigned long size, int replace_reg)
/* [SUMMARY] Get a free ARR.
<base> The starting (base) address of the region.
<size> The size (in bytes) of the region.
......@@ -86,9 +86,24 @@ cyrix_get_free_region(unsigned long base, unsigned long size)
{
int i;
mtrr_type ltype;
unsigned long lbase;
unsigned int lsize;
unsigned long lbase, lsize;
switch (replace_reg) {
case 7:
if (size < 0x40)
break;
case 6:
case 5:
case 4:
return replace_reg;
case 3:
if (arr3_protected)
break;
case 2:
case 1:
case 0:
return replace_reg;
}
/* If we are to set up a region >32M then look at ARR7 immediately */
if (size > 0x2000) {
cyrix_get_arr(7, &lbase, &lsize, &ltype);
......@@ -214,7 +229,7 @@ static void cyrix_set_arr(unsigned int reg, unsigned long base,
typedef struct {
unsigned long base;
unsigned int size;
unsigned long size;
mtrr_type type;
} arr_state_t;
......
arch/i386/kernel/cpu/mtrr/generic.c
浏览文件 @ 4522d582
......@@ -3,6 +3,7 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <asm/io.h>
#include <asm/mtrr.h>
#include <asm/msr.h>
......@@ -15,12 +16,19 @@ struct mtrr_state {
struct mtrr_var_range *var_ranges;
mtrr_type fixed_ranges[NUM_FIXED_RANGES];
unsigned char enabled;
unsigned char have_fixed;
mtrr_type def_type;
};
static unsigned long smp_changes_mask;
static struct mtrr_state mtrr_state = {};
#undef MODULE_PARAM_PREFIX
#define MODULE_PARAM_PREFIX "mtrr."
static __initdata int mtrr_show;
module_param_named(show, mtrr_show, bool, 0);
/* Get the MSR pair relating to a var range */
static void __init
get_mtrr_var_range(unsigned int index, struct mtrr_var_range *vr)
......@@ -43,6 +51,14 @@ get_fixed_ranges(mtrr_type * frs)
rdmsr(MTRRfix4K_C0000_MSR + i, p[6 + i * 2], p[7 + i * 2]);
}
static void __init print_fixed(unsigned base, unsigned step, const mtrr_type*types)
{
unsigned i;
for (i = 0; i < 8; ++i, ++types, base += step)
printk(KERN_INFO "MTRR %05X-%05X %s\n", base, base + step - 1, mtrr_attrib_to_str(*types));
}
/* Grab all of the MTRR state for this CPU into *state */
void __init get_mtrr_state(void)
{
......@@ -58,13 +74,49 @@ void __init get_mtrr_state(void)
}
vrs = mtrr_state.var_ranges;
rdmsr(MTRRcap_MSR, lo, dummy);
mtrr_state.have_fixed = (lo >> 8) & 1;
for (i = 0; i < num_var_ranges; i++)
get_mtrr_var_range(i, &vrs[i]);
get_fixed_ranges(mtrr_state.fixed_ranges);
if (mtrr_state.have_fixed)
get_fixed_ranges(mtrr_state.fixed_ranges);
rdmsr(MTRRdefType_MSR, lo, dummy);
mtrr_state.def_type = (lo & 0xff);
mtrr_state.enabled = (lo & 0xc00) >> 10;
if (mtrr_show) {
int high_width;
printk(KERN_INFO "MTRR default type: %s\n", mtrr_attrib_to_str(mtrr_state.def_type));
if (mtrr_state.have_fixed) {
printk(KERN_INFO "MTRR fixed ranges %sabled:\n",
mtrr_state.enabled & 1 ? "en" : "dis");
print_fixed(0x00000, 0x10000, mtrr_state.fixed_ranges + 0);
for (i = 0; i < 2; ++i)
print_fixed(0x80000 + i * 0x20000, 0x04000, mtrr_state.fixed_ranges + (i + 1) * 8);
for (i = 0; i < 8; ++i)
print_fixed(0xC0000 + i * 0x08000, 0x01000, mtrr_state.fixed_ranges + (i + 3) * 8);
}
printk(KERN_INFO "MTRR variable ranges %sabled:\n",
mtrr_state.enabled & 2 ? "en" : "dis");
high_width = ((size_or_mask ? ffs(size_or_mask) - 1 : 32) - (32 - PAGE_SHIFT) + 3) / 4;
for (i = 0; i < num_var_ranges; ++i) {
if (mtrr_state.var_ranges[i].mask_lo & (1 << 11))
printk(KERN_INFO "MTRR %u base %0*X%05X000 mask %0*X%05X000 %s\n",
i,
high_width,
mtrr_state.var_ranges[i].base_hi,
mtrr_state.var_ranges[i].base_lo >> 12,
high_width,
mtrr_state.var_ranges[i].mask_hi,
mtrr_state.var_ranges[i].mask_lo >> 12,
mtrr_attrib_to_str(mtrr_state.var_ranges[i].base_lo & 0xff));
else
printk(KERN_INFO "MTRR %u disabled\n", i);
}
}
}
/* Some BIOS's are fucked and don't set all MTRRs the same! */
......@@ -95,7 +147,7 @@ void mtrr_wrmsr(unsigned msr, unsigned a, unsigned b)
smp_processor_id(), msr, a, b);
}
int generic_get_free_region(unsigned long base, unsigned long size)
int generic_get_free_region(unsigned long base, unsigned long size, int replace_reg)
/* [SUMMARY] Get a free MTRR.
<base> The starting (base) address of the region.
<size> The size (in bytes) of the region.
......@@ -104,10 +156,11 @@ int generic_get_free_region(unsigned long base, unsigned long size)
{
int i, max;
mtrr_type ltype;
unsigned long lbase;
unsigned lsize;
unsigned long lbase, lsize;
max = num_var_ranges;
if (replace_reg >= 0 && replace_reg < max)
return replace_reg;
for (i = 0; i < max; ++i) {
mtrr_if->get(i, &lbase, &lsize, &ltype);
if (lsize == 0)
......@@ -117,7 +170,7 @@ int generic_get_free_region(unsigned long base, unsigned long size)
}
static void generic_get_mtrr(unsigned int reg, unsigned long *base,
unsigned int *size, mtrr_type * type)
unsigned long *size, mtrr_type *type)
{
unsigned int mask_lo, mask_hi, base_lo, base_hi;
......@@ -202,7 +255,9 @@ static int set_mtrr_var_ranges(unsigned int index, struct mtrr_var_range *vr)
return changed;
}
static unsigned long set_mtrr_state(u32 deftype_lo, u32 deftype_hi)
static u32 deftype_lo, deftype_hi;
static unsigned long set_mtrr_state(void)
/* [SUMMARY] Set the MTRR state for this CPU.
<state> The MTRR state information to read.
<ctxt> Some relevant CPU context.
......@@ -217,14 +272,14 @@ static unsigned long set_mtrr_state(u32 deftype_lo, u32 deftype_hi)
if (set_mtrr_var_ranges(i, &mtrr_state.var_ranges[i]))
change_mask |= MTRR_CHANGE_MASK_VARIABLE;
if (set_fixed_ranges(mtrr_state.fixed_ranges))
if (mtrr_state.have_fixed && set_fixed_ranges(mtrr_state.fixed_ranges))
change_mask |= MTRR_CHANGE_MASK_FIXED;
/* Set_mtrr_restore restores the old value of MTRRdefType,
so to set it we fiddle with the saved value */
if ((deftype_lo & 0xff) != mtrr_state.def_type
|| ((deftype_lo & 0xc00) >> 10) != mtrr_state.enabled) {
deftype_lo |= (mtrr_state.def_type | mtrr_state.enabled << 10);
deftype_lo = (deftype_lo & ~0xcff) | mtrr_state.def_type | (mtrr_state.enabled << 10);
change_mask |= MTRR_CHANGE_MASK_DEFTYPE;
}
......@@ -233,7 +288,6 @@ static unsigned long set_mtrr_state(u32 deftype_lo, u32 deftype_hi)
static unsigned long cr4 = 0;
static u32 deftype_lo, deftype_hi;
static DEFINE_SPINLOCK(set_atomicity_lock);
/*
......@@ -271,7 +325,7 @@ static void prepare_set(void) __acquires(set_atomicity_lock)
rdmsr(MTRRdefType_MSR, deftype_lo, deftype_hi);
/* Disable MTRRs, and set the default type to uncached */
mtrr_wrmsr(MTRRdefType_MSR, deftype_lo & 0xf300UL, deftype_hi);
mtrr_wrmsr(MTRRdefType_MSR, deftype_lo & ~0xcff, deftype_hi);
}
static void post_set(void) __releases(set_atomicity_lock)
......@@ -300,7 +354,7 @@ static void generic_set_all(void)
prepare_set();
/* Actually set the state */
mask = set_mtrr_state(deftype_lo,deftype_hi);
mask = set_mtrr_state();
post_set();
local_irq_restore(flags);
......@@ -366,7 +420,7 @@ int generic_validate_add_page(unsigned long base, unsigned long size, unsigned i
printk(KERN_WARNING "mtrr: base(0x%lx000) is not 4 MiB aligned\n", base);
return -EINVAL;
}
if (!(base + size < 0x70000000 || base > 0x7003FFFF) &&
if (!(base + size < 0x70000 || base > 0x7003F) &&
(type == MTRR_TYPE_WRCOMB
|| type == MTRR_TYPE_WRBACK)) {
printk(KERN_WARNING "mtrr: writable mtrr between 0x70000000 and 0x7003FFFF may hang the CPU.\n");
......
arch/i386/kernel/cpu/mtrr/if.c
浏览文件 @ 4522d582
......@@ -17,7 +17,7 @@ extern unsigned int *usage_table;
#define FILE_FCOUNT(f) (((struct seq_file *)((f)->private_data))->private)
static char *mtrr_strings[MTRR_NUM_TYPES] =
static const char *const mtrr_strings[MTRR_NUM_TYPES] =
{
"uncachable", /* 0 */
"write-combining", /* 1 */
......@@ -28,7 +28,7 @@ static char *mtrr_strings[MTRR_NUM_TYPES] =
"write-back", /* 6 */
};
char *mtrr_attrib_to_str(int x)
const char *mtrr_attrib_to_str(int x)
{
return (x <= 6) ? mtrr_strings[x] : "?";
}
......@@ -44,10 +44,9 @@ mtrr_file_add(unsigned long base, unsigned long size,
max = num_var_ranges;
if (fcount == NULL) {
fcount = kmalloc(max * sizeof *fcount, GFP_KERNEL);
fcount = kzalloc(max * sizeof *fcount, GFP_KERNEL);
if (!fcount)
return -ENOMEM;
memset(fcount, 0, max * sizeof *fcount);
FILE_FCOUNT(file) = fcount;
}
if (!page) {
......@@ -155,6 +154,7 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg)
{
int err = 0;
mtrr_type type;
unsigned long size;
struct mtrr_sentry sentry;
struct mtrr_gentry gentry;
void __user *arg = (void __user *) __arg;
......@@ -235,15 +235,15 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg)
case MTRRIOC_GET_ENTRY:
if (gentry.regnum >= num_var_ranges)
return -EINVAL;
mtrr_if->get(gentry.regnum, &gentry.base, &gentry.size, &type);
mtrr_if->get(gentry.regnum, &gentry.base, &size, &type);
/* Hide entries that go above 4GB */
if (gentry.base + gentry.size > 0x100000
|| gentry.size == 0x100000)
if (gentry.base + size - 1 >= (1UL << (8 * sizeof(gentry.size) - PAGE_SHIFT))
|| size >= (1UL << (8 * sizeof(gentry.size) - PAGE_SHIFT)))
gentry.base = gentry.size = gentry.type = 0;
else {
gentry.base <<= PAGE_SHIFT;
gentry.size <<= PAGE_SHIFT;
gentry.size = size << PAGE_SHIFT;
gentry.type = type;
}
......@@ -273,8 +273,14 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg)
case MTRRIOC_GET_PAGE_ENTRY:
if (gentry.regnum >= num_var_ranges)
return -EINVAL;
mtrr_if->get(gentry.regnum, &gentry.base, &gentry.size, &type);
gentry.type = type;
mtrr_if->get(gentry.regnum, &gentry.base, &size, &type);
/* Hide entries that would overflow */
if (size != (__typeof__(gentry.size))size)
gentry.base = gentry.size = gentry.type = 0;
else {
gentry.size = size;
gentry.type = type;
}
break;
}
......@@ -353,8 +359,7 @@ static int mtrr_seq_show(struct seq_file *seq, void *offset)
char factor;
int i, max, len;
mtrr_type type;
unsigned long base;
unsigned int size;
unsigned long base, size;
len = 0;
max = num_var_ranges;
......@@ -373,7 +378,7 @@ static int mtrr_seq_show(struct seq_file *seq, void *offset)
}
/* RED-PEN: base can be > 32bit */
len += seq_printf(seq,
"reg%02i: base=0x%05lx000 (%4liMB), size=%4i%cB: %s, count=%d\n",
"reg%02i: base=0x%05lx000 (%4luMB), size=%4lu%cB: %s, count=%d\n",
i, base, base >> (20 - PAGE_SHIFT), size, factor,
mtrr_attrib_to_str(type), usage_table[i]);
}
......
arch/i386/kernel/cpu/mtrr/main.c
浏览文件 @ 4522d582
......@@ -59,7 +59,11 @@ struct mtrr_ops * mtrr_if = NULL;
static void set_mtrr(unsigned int reg, unsigned long base,
unsigned long size, mtrr_type type);
#ifndef CONFIG_X86_64
extern int arr3_protected;
#else
#define arr3_protected 0
#endif
void set_mtrr_ops(struct mtrr_ops * ops)
{
......@@ -168,6 +172,13 @@ static void ipi_handler(void *info)
#endif
static inline int types_compatible(mtrr_type type1, mtrr_type type2) {
return type1 == MTRR_TYPE_UNCACHABLE ||
type2 == MTRR_TYPE_UNCACHABLE ||
(type1 == MTRR_TYPE_WRTHROUGH && type2 == MTRR_TYPE_WRBACK) ||
(type1 == MTRR_TYPE_WRBACK && type2 == MTRR_TYPE_WRTHROUGH);
}
/**
* set_mtrr - update mtrrs on all processors
* @reg: mtrr in question
......@@ -263,8 +274,8 @@ static void set_mtrr(unsigned int reg, unsigned long base,
/**
* mtrr_add_page - Add a memory type region
* @base: Physical base address of region in pages (4 KB)
* @size: Physical size of region in pages (4 KB)
* @base: Physical base address of region in pages (in units of 4 kB!)
* @size: Physical size of region in pages (4 kB)
* @type: Type of MTRR desired
* @increment: If this is true do usage counting on the region
*
......@@ -300,11 +311,9 @@ static void set_mtrr(unsigned int reg, unsigned long base,
int mtrr_add_page(unsigned long base, unsigned long size,
unsigned int type, char increment)
{
int i;
int i, replace, error;
mtrr_type ltype;
unsigned long lbase;
unsigned int lsize;
int error;
unsigned long lbase, lsize;
if (!mtrr_if)
return -ENXIO;
......@@ -324,12 +333,18 @@ int mtrr_add_page(unsigned long base, unsigned long size,
return -ENOSYS;
}
if (!size) {
printk(KERN_WARNING "mtrr: zero sized request\n");
return -EINVAL;
}
if (base & size_or_mask || size & size_or_mask) {
printk(KERN_WARNING "mtrr: base or size exceeds the MTRR width\n");
return -EINVAL;
}
error = -EINVAL;
replace = -1;
/* No CPU hotplug when we change MTRR entries */
lock_cpu_hotplug();
......@@ -337,21 +352,28 @@ int mtrr_add_page(unsigned long base, unsigned long size,
mutex_lock(&mtrr_mutex);
for (i = 0; i < num_var_ranges; ++i) {
mtrr_if->get(i, &lbase, &lsize, &ltype);
if (base >= lbase + lsize)
continue;
if ((base < lbase) && (base + size <= lbase))
if (!lsize || base > lbase + lsize - 1 || base + size - 1 < lbase)
continue;
/* At this point we know there is some kind of overlap/enclosure */
if ((base < lbase) || (base + size > lbase + lsize)) {
if (base < lbase || base + size - 1 > lbase + lsize - 1) {
if (base <= lbase && base + size - 1 >= lbase + lsize - 1) {
/* New region encloses an existing region */
if (type == ltype) {
replace = replace == -1 ? i : -2;
continue;
}
else if (types_compatible(type, ltype))
continue;
}
printk(KERN_WARNING
"mtrr: 0x%lx000,0x%lx000 overlaps existing"
" 0x%lx000,0x%x000\n", base, size, lbase,
" 0x%lx000,0x%lx000\n", base, size, lbase,
lsize);
goto out;
}
/* New region is enclosed by an existing region */
if (ltype != type) {
if (type == MTRR_TYPE_UNCACHABLE)
if (types_compatible(type, ltype))
continue;
printk (KERN_WARNING "mtrr: type mismatch for %lx000,%lx000 old: %s new: %s\n",
base, size, mtrr_attrib_to_str(ltype),
......@@ -364,10 +386,18 @@ int mtrr_add_page(unsigned long base, unsigned long size,
goto out;
}
/* Search for an empty MTRR */
i = mtrr_if->get_free_region(base, size);
i = mtrr_if->get_free_region(base, size, replace);
if (i >= 0) {
set_mtrr(i, base, size, type);
usage_table[i] = 1;
if (likely(replace < 0))
usage_table[i] = 1;
else {
usage_table[i] = usage_table[replace] + !!increment;
if (unlikely(replace != i)) {
set_mtrr(replace, 0, 0, 0);
usage_table[replace] = 0;
}
}
} else
printk(KERN_INFO "mtrr: no more MTRRs available\n");
error = i;
......@@ -455,8 +485,7 @@ int mtrr_del_page(int reg, unsigned long base, unsigned long size)
{
int i, max;
mtrr_type ltype;
unsigned long lbase;
unsigned int lsize;
unsigned long lbase, lsize;
int error = -EINVAL;
if (!mtrr_if)
......@@ -544,9 +573,11 @@ extern void centaur_init_mtrr(void);
static void __init init_ifs(void)
{
#ifndef CONFIG_X86_64
amd_init_mtrr();
cyrix_init_mtrr();
centaur_init_mtrr();
#endif
}
/* The suspend/resume methods are only for CPU without MTRR. CPU using generic
......@@ -555,7 +586,7 @@ static void __init init_ifs(void)
struct mtrr_value {
mtrr_type ltype;
unsigned long lbase;
unsigned int lsize;
unsigned long lsize;
};
static struct mtrr_value * mtrr_state;
......@@ -565,10 +596,8 @@ static int mtrr_save(struct sys_device * sysdev, pm_message_t state)
int i;
int size = num_var_ranges * sizeof(struct mtrr_value);
mtrr_state = kmalloc(size,GFP_ATOMIC);
if (mtrr_state)
memset(mtrr_state,0,size);
else
mtrr_state = kzalloc(size,GFP_ATOMIC);
if (!mtrr_state)
return -ENOMEM;
for (i = 0; i < num_var_ranges; i++) {
......
arch/i386/kernel/cpu/mtrr/mtrr.h
浏览文件 @ 4522d582
......@@ -43,15 +43,16 @@ struct mtrr_ops {
void (*set_all)(void);
void (*get)(unsigned int reg, unsigned long *base,
unsigned int *size, mtrr_type * type);
int (*get_free_region) (unsigned long base, unsigned long size);
unsigned long *size, mtrr_type * type);
int (*get_free_region)(unsigned long base, unsigned long size,
int replace_reg);
int (*validate_add_page)(unsigned long base, unsigned long size,
unsigned int type);
int (*have_wrcomb)(void);
};
extern int generic_get_free_region(unsigned long base, unsigned long size);
extern int generic_get_free_region(unsigned long base, unsigned long size,
int replace_reg);
extern int generic_validate_add_page(unsigned long base, unsigned long size,
unsigned int type);
......@@ -62,17 +63,17 @@ extern int positive_have_wrcomb(void);
/* library functions for processor-specific routines */
struct set_mtrr_context {
unsigned long flags;
unsigned long deftype_lo;
unsigned long deftype_hi;
unsigned long cr4val;
unsigned long ccr3;
u32 deftype_lo;
u32 deftype_hi;
u32 ccr3;
};
struct mtrr_var_range {
unsigned long base_lo;
unsigned long base_hi;
unsigned long mask_lo;
unsigned long mask_hi;
u32 base_lo;
u32 base_hi;
u32 mask_lo;
u32 mask_hi;
};
void set_mtrr_done(struct set_mtrr_context *ctxt);
......@@ -92,6 +93,6 @@ extern struct mtrr_ops * mtrr_if;
extern unsigned int num_var_ranges;
void mtrr_state_warn(void);
char *mtrr_attrib_to_str(int x);
const char *mtrr_attrib_to_str(int x);
void mtrr_wrmsr(unsigned, unsigned, unsigned);
arch/i386/kernel/cpu/proc.c
浏览文件 @ 4522d582
......@@ -152,9 +152,10 @@ static int show_cpuinfo(struct seq_file *m, void *v)
seq_printf(m, " [%d]", i);
}
seq_printf(m, "\nbogomips\t: %lu.%02lu\n\n",
seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
c->loops_per_jiffy/(500000/HZ),
(c->loops_per_jiffy/(5000/HZ)) % 100);
seq_printf(m, "clflush size\t: %u\n\n", c->x86_clflush_size);
return 0;
}
......
arch/i386/kernel/cpuid.c
浏览文件 @ 4522d582
......@@ -34,7 +34,6 @@
#include <linux/major.h>
#include <linux/fs.h>
#include <linux/smp_lock.h>
#include <linux/fs.h>
#include <linux/device.h>
#include <linux/cpu.h>
#include <linux/notifier.h>
......
arch/i386/kernel/e820.c 0 → 100644
浏览文件 @ 4522d582
此差异已折叠。
arch/i386/kernel/efi.c
浏览文件 @ 4522d582
......@@ -194,17 +194,24 @@ inline int efi_set_rtc_mmss(unsigned long nowtime)
return 0;
}
/*
* This should only be used during kernel init and before runtime
* services have been remapped, therefore, we'll need to call in physical
* mode. Note, this call isn't used later, so mark it __init.
* This is used during kernel init before runtime
* services have been remapped and also during suspend, therefore,
* we'll need to call both in physical and virtual modes.
*/
inline unsigned long __init efi_get_time(void)
inline unsigned long efi_get_time(void)
{
efi_status_t status;
efi_time_t eft;
efi_time_cap_t cap;
status = phys_efi_get_time(&eft, &cap);
if (efi.get_time) {
/* if we are in virtual mode use remapped function */
status = efi.get_time(&eft, &cap);
} else {
/* we are in physical mode */
status = phys_efi_get_time(&eft, &cap);
}
if (status != EFI_SUCCESS)
printk("Oops: efitime: can't read time status: 0x%lx\n",status);
......
arch/i386/kernel/entry.S
浏览文件 @ 4522d582
......@@ -30,12 +30,13 @@
* 18(%esp) - %eax
* 1C(%esp) - %ds
* 20(%esp) - %es
* 24(%esp) - orig_eax
* 28(%esp) - %eip
* 2C(%esp) - %cs
* 30(%esp) - %eflags
* 34(%esp) - %oldesp
* 38(%esp) - %oldss
* 24(%esp) - %gs
* 28(%esp) - orig_eax
* 2C(%esp) - %eip
* 30(%esp) - %cs
* 34(%esp) - %eflags
* 38(%esp) - %oldesp
* 3C(%esp) - %oldss
*
* "current" is in register %ebx during any slow entries.
*/
......@@ -48,26 +49,24 @@
#include <asm/smp.h>
#include <asm/page.h>
#include <asm/desc.h>
#include <asm/percpu.h>
#include <asm/dwarf2.h>
#include "irq_vectors.h"
#define nr_syscalls ((syscall_table_size)/4)
/*
* We use macros for low-level operations which need to be overridden
* for paravirtualization. The following will never clobber any registers:
* INTERRUPT_RETURN (aka. "iret")
* GET_CR0_INTO_EAX (aka. "movl %cr0, %eax")
* ENABLE_INTERRUPTS_SYSEXIT (aka "sti; sysexit").
*
* For DISABLE_INTERRUPTS/ENABLE_INTERRUPTS (aka "cli"/"sti"), you must
* specify what registers can be overwritten (CLBR_NONE, CLBR_EAX/EDX/ECX/ANY).
* Allowing a register to be clobbered can shrink the paravirt replacement
* enough to patch inline, increasing performance.
*/
EBX = 0x00
ECX = 0x04
EDX = 0x08
ESI = 0x0C
EDI = 0x10
EBP = 0x14
EAX = 0x18
DS = 0x1C
ES = 0x20
ORIG_EAX = 0x24
EIP = 0x28
CS = 0x2C
EFLAGS = 0x30
OLDESP = 0x34
OLDSS = 0x38
#define nr_syscalls ((syscall_table_size)/4)
CF_MASK = 0x00000001
TF_MASK = 0x00000100
......@@ -76,23 +75,16 @@ DF_MASK = 0x00000400
NT_MASK = 0x00004000
VM_MASK = 0x00020000
/* These are replaces for paravirtualization */
#define DISABLE_INTERRUPTS cli
#define ENABLE_INTERRUPTS sti
#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit
#define INTERRUPT_RETURN iret
#define GET_CR0_INTO_EAX movl %cr0, %eax
#ifdef CONFIG_PREEMPT
#define preempt_stop DISABLE_INTERRUPTS; TRACE_IRQS_OFF
#define preempt_stop(clobbers) DISABLE_INTERRUPTS(clobbers); TRACE_IRQS_OFF
#else
#define preempt_stop
#define preempt_stop(clobbers)
#define resume_kernel restore_nocheck
#endif
.macro TRACE_IRQS_IRET
#ifdef CONFIG_TRACE_IRQFLAGS
testl $IF_MASK,EFLAGS(%esp) # interrupts off?
testl $IF_MASK,PT_EFLAGS(%esp) # interrupts off?
jz 1f
TRACE_IRQS_ON
1:
......@@ -107,6 +99,9 @@ VM_MASK = 0x00020000
#define SAVE_ALL \
cld; \
pushl %gs; \
CFI_ADJUST_CFA_OFFSET 4;\
/*CFI_REL_OFFSET gs, 0;*/\
pushl %es; \
CFI_ADJUST_CFA_OFFSET 4;\
/*CFI_REL_OFFSET es, 0;*/\
......@@ -136,7 +131,9 @@ VM_MASK = 0x00020000
CFI_REL_OFFSET ebx, 0;\
movl $(__USER_DS), %edx; \
movl %edx, %ds; \
movl %edx, %es;
movl %edx, %es; \
movl $(__KERNEL_PDA), %edx; \
movl %edx, %gs
#define RESTORE_INT_REGS \
popl %ebx; \
......@@ -169,17 +166,22 @@ VM_MASK = 0x00020000
2: popl %es; \
CFI_ADJUST_CFA_OFFSET -4;\
/*CFI_RESTORE es;*/\
.section .fixup,"ax"; \
3: movl $0,(%esp); \
jmp 1b; \
3: popl %gs; \
CFI_ADJUST_CFA_OFFSET -4;\
/*CFI_RESTORE gs;*/\
.pushsection .fixup,"ax"; \
4: movl $0,(%esp); \
jmp 1b; \
5: movl $0,(%esp); \
jmp 2b; \
.previous; \
6: movl $0,(%esp); \
jmp 3b; \
.section __ex_table,"a";\
.align 4; \
.long 1b,3b; \
.long 2b,4b; \
.previous
.long 1b,4b; \
.long 2b,5b; \
.long 3b,6b; \
.popsection
#define RING0_INT_FRAME \
CFI_STARTPROC simple;\
......@@ -198,18 +200,18 @@ VM_MASK = 0x00020000
#define RING0_PTREGS_FRAME \
CFI_STARTPROC simple;\
CFI_SIGNAL_FRAME;\
CFI_DEF_CFA esp, OLDESP-EBX;\
/*CFI_OFFSET cs, CS-OLDESP;*/\
CFI_OFFSET eip, EIP-OLDESP;\
/*CFI_OFFSET es, ES-OLDESP;*/\
/*CFI_OFFSET ds, DS-OLDESP;*/\
CFI_OFFSET eax, EAX-OLDESP;\
CFI_OFFSET ebp, EBP-OLDESP;\
CFI_OFFSET edi, EDI-OLDESP;\
CFI_OFFSET esi, ESI-OLDESP;\
CFI_OFFSET edx, EDX-OLDESP;\
CFI_OFFSET ecx, ECX-OLDESP;\
CFI_OFFSET ebx, EBX-OLDESP
CFI_DEF_CFA esp, PT_OLDESP-PT_EBX;\
/*CFI_OFFSET cs, PT_CS-PT_OLDESP;*/\
CFI_OFFSET eip, PT_EIP-PT_OLDESP;\
/*CFI_OFFSET es, PT_ES-PT_OLDESP;*/\
/*CFI_OFFSET ds, PT_DS-PT_OLDESP;*/\
CFI_OFFSET eax, PT_EAX-PT_OLDESP;\
CFI_OFFSET ebp, PT_EBP-PT_OLDESP;\
CFI_OFFSET edi, PT_EDI-PT_OLDESP;\
CFI_OFFSET esi, PT_ESI-PT_OLDESP;\
CFI_OFFSET edx, PT_EDX-PT_OLDESP;\
CFI_OFFSET ecx, PT_ECX-PT_OLDESP;\
CFI_OFFSET ebx, PT_EBX-PT_OLDESP
ENTRY(ret_from_fork)
CFI_STARTPROC
......@@ -237,17 +239,18 @@ ENTRY(ret_from_fork)
ALIGN
RING0_PTREGS_FRAME
ret_from_exception:
preempt_stop
preempt_stop(CLBR_ANY)
ret_from_intr:
GET_THREAD_INFO(%ebp)
check_userspace:
movl EFLAGS(%esp), %eax # mix EFLAGS and CS
movb CS(%esp), %al
movl PT_EFLAGS(%esp), %eax # mix EFLAGS and CS
movb PT_CS(%esp), %al
andl $(VM_MASK | SEGMENT_RPL_MASK), %eax
cmpl $USER_RPL, %eax
jb resume_kernel # not returning to v8086 or userspace
ENTRY(resume_userspace)
DISABLE_INTERRUPTS # make sure we don't miss an interrupt
DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
# setting need_resched or sigpending
# between sampling and the iret
movl TI_flags(%ebp), %ecx
......@@ -258,14 +261,14 @@ ENTRY(resume_userspace)
#ifdef CONFIG_PREEMPT
ENTRY(resume_kernel)
DISABLE_INTERRUPTS
DISABLE_INTERRUPTS(CLBR_ANY)
cmpl $0,TI_preempt_count(%ebp) # non-zero preempt_count ?
jnz restore_nocheck
need_resched:
movl TI_flags(%ebp), %ecx # need_resched set ?
testb $_TIF_NEED_RESCHED, %cl
jz restore_all
testl $IF_MASK,EFLAGS(%esp) # interrupts off (exception path) ?
testl $IF_MASK,PT_EFLAGS(%esp) # interrupts off (exception path) ?
jz restore_all
call preempt_schedule_irq
jmp need_resched
......@@ -287,7 +290,7 @@ sysenter_past_esp:
* No need to follow this irqs on/off section: the syscall
* disabled irqs and here we enable it straight after entry:
*/
ENABLE_INTERRUPTS
ENABLE_INTERRUPTS(CLBR_NONE)
pushl $(__USER_DS)
CFI_ADJUST_CFA_OFFSET 4
/*CFI_REL_OFFSET ss, 0*/
......@@ -331,20 +334,27 @@ sysenter_past_esp:
cmpl $(nr_syscalls), %eax
jae syscall_badsys
call *sys_call_table(,%eax,4)
movl %eax,EAX(%esp)
DISABLE_INTERRUPTS
movl %eax,PT_EAX(%esp)
DISABLE_INTERRUPTS(CLBR_ECX|CLBR_EDX)
TRACE_IRQS_OFF
movl TI_flags(%ebp), %ecx
testw $_TIF_ALLWORK_MASK, %cx
jne syscall_exit_work
/* if something modifies registers it must also disable sysexit */
movl EIP(%esp), %edx
movl OLDESP(%esp), %ecx
movl PT_EIP(%esp), %edx
movl PT_OLDESP(%esp), %ecx
xorl %ebp,%ebp
TRACE_IRQS_ON
1: mov PT_GS(%esp), %gs
ENABLE_INTERRUPTS_SYSEXIT
CFI_ENDPROC
.pushsection .fixup,"ax"
2: movl $0,PT_GS(%esp)
jmp 1b
.section __ex_table,"a"
.align 4
.long 1b,2b
.popsection
# system call handler stub
ENTRY(system_call)
......@@ -353,7 +363,7 @@ ENTRY(system_call)
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
GET_THREAD_INFO(%ebp)
testl $TF_MASK,EFLAGS(%esp)
testl $TF_MASK,PT_EFLAGS(%esp)
jz no_singlestep
orl $_TIF_SINGLESTEP,TI_flags(%ebp)
no_singlestep:
......@@ -365,9 +375,9 @@ no_singlestep:
jae syscall_badsys
syscall_call:
call *sys_call_table(,%eax,4)
movl %eax,EAX(%esp) # store the return value
movl %eax,PT_EAX(%esp) # store the return value
syscall_exit:
DISABLE_INTERRUPTS # make sure we don't miss an interrupt
DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
# setting need_resched or sigpending
# between sampling and the iret
TRACE_IRQS_OFF
......@@ -376,12 +386,12 @@ syscall_exit:
jne syscall_exit_work
restore_all:
movl EFLAGS(%esp), %eax # mix EFLAGS, SS and CS
# Warning: OLDSS(%esp) contains the wrong/random values if we
movl PT_EFLAGS(%esp), %eax # mix EFLAGS, SS and CS
# Warning: PT_OLDSS(%esp) contains the wrong/random values if we
# are returning to the kernel.
# See comments in process.c:copy_thread() for details.
movb OLDSS(%esp), %ah
movb CS(%esp), %al
movb PT_OLDSS(%esp), %ah
movb PT_CS(%esp), %al
andl $(VM_MASK | (SEGMENT_TI_MASK << 8) | SEGMENT_RPL_MASK), %eax
cmpl $((SEGMENT_LDT << 8) | USER_RPL), %eax
CFI_REMEMBER_STATE
......@@ -390,13 +400,13 @@ restore_nocheck:
TRACE_IRQS_IRET
restore_nocheck_notrace:
RESTORE_REGS
addl $4, %esp
addl $4, %esp # skip orig_eax/error_code
CFI_ADJUST_CFA_OFFSET -4
1: INTERRUPT_RETURN
.section .fixup,"ax"
iret_exc:
TRACE_IRQS_ON
ENABLE_INTERRUPTS
ENABLE_INTERRUPTS(CLBR_NONE)
pushl $0 # no error code
pushl $do_iret_error
jmp error_code
......@@ -408,33 +418,42 @@ iret_exc:
CFI_RESTORE_STATE
ldt_ss:
larl OLDSS(%esp), %eax
larl PT_OLDSS(%esp), %eax
jnz restore_nocheck
testl $0x00400000, %eax # returning to 32bit stack?
jnz restore_nocheck # allright, normal return
#ifdef CONFIG_PARAVIRT
/*
* The kernel can't run on a non-flat stack if paravirt mode
* is active. Rather than try to fixup the high bits of
* ESP, bypass this code entirely. This may break DOSemu
* and/or Wine support in a paravirt VM, although the option
* is still available to implement the setting of the high
* 16-bits in the INTERRUPT_RETURN paravirt-op.
*/
cmpl $0, paravirt_ops+PARAVIRT_enabled
jne restore_nocheck
#endif
/* If returning to userspace with 16bit stack,
* try to fix the higher word of ESP, as the CPU
* won't restore it.
* This is an "official" bug of all the x86-compatible
* CPUs, which we can try to work around to make
* dosemu and wine happy. */
subl $8, %esp # reserve space for switch16 pointer
CFI_ADJUST_CFA_OFFSET 8
DISABLE_INTERRUPTS
movl PT_OLDESP(%esp), %eax
movl %esp, %edx
call patch_espfix_desc
pushl $__ESPFIX_SS
CFI_ADJUST_CFA_OFFSET 4
pushl %eax
CFI_ADJUST_CFA_OFFSET 4
DISABLE_INTERRUPTS(CLBR_EAX)
TRACE_IRQS_OFF
movl %esp, %eax
/* Set up the 16bit stack frame with switch32 pointer on top,
* and a switch16 pointer on top of the current frame. */
call setup_x86_bogus_stack
CFI_ADJUST_CFA_OFFSET -8 # frame has moved
TRACE_IRQS_IRET
RESTORE_REGS
lss 20+4(%esp), %esp # switch to 16bit stack
1: INTERRUPT_RETURN
.section __ex_table,"a"
.align 4
.long 1b,iret_exc
.previous
lss (%esp), %esp
CFI_ADJUST_CFA_OFFSET -8
jmp restore_nocheck
CFI_ENDPROC
# perform work that needs to be done immediately before resumption
......@@ -445,7 +464,7 @@ work_pending:
jz work_notifysig
work_resched:
call schedule
DISABLE_INTERRUPTS # make sure we don't miss an interrupt
DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
# setting need_resched or sigpending
# between sampling and the iret
TRACE_IRQS_OFF
......@@ -458,7 +477,8 @@ work_resched:
work_notifysig: # deal with pending signals and
# notify-resume requests
testl $VM_MASK, EFLAGS(%esp)
#ifdef CONFIG_VM86
testl $VM_MASK, PT_EFLAGS(%esp)
movl %esp, %eax
jne work_notifysig_v86 # returning to kernel-space or
# vm86-space
......@@ -468,29 +488,30 @@ work_notifysig: # deal with pending signals and
ALIGN
work_notifysig_v86:
#ifdef CONFIG_VM86
pushl %ecx # save ti_flags for do_notify_resume
CFI_ADJUST_CFA_OFFSET 4
call save_v86_state # %eax contains pt_regs pointer
popl %ecx
CFI_ADJUST_CFA_OFFSET -4
movl %eax, %esp
#else
movl %esp, %eax
#endif
xorl %edx, %edx
call do_notify_resume
jmp resume_userspace_sig
#endif
# perform syscall exit tracing
ALIGN
syscall_trace_entry:
movl $-ENOSYS,EAX(%esp)
movl $-ENOSYS,PT_EAX(%esp)
movl %esp, %eax
xorl %edx,%edx
call do_syscall_trace
cmpl $0, %eax
jne resume_userspace # ret != 0 -> running under PTRACE_SYSEMU,
# so must skip actual syscall
movl ORIG_EAX(%esp), %eax
movl PT_ORIG_EAX(%esp), %eax
cmpl $(nr_syscalls), %eax
jnae syscall_call
jmp syscall_exit
......@@ -501,7 +522,7 @@ syscall_exit_work:
testb $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP), %cl
jz work_pending
TRACE_IRQS_ON
ENABLE_INTERRUPTS # could let do_syscall_trace() call
ENABLE_INTERRUPTS(CLBR_ANY) # could let do_syscall_trace() call
# schedule() instead
movl %esp, %eax
movl $1, %edx
......@@ -515,39 +536,38 @@ syscall_fault:
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
GET_THREAD_INFO(%ebp)
movl $-EFAULT,EAX(%esp)
movl $-EFAULT,PT_EAX(%esp)
jmp resume_userspace
syscall_badsys:
movl $-ENOSYS,EAX(%esp)
movl $-ENOSYS,PT_EAX(%esp)
jmp resume_userspace
CFI_ENDPROC
#define FIXUP_ESPFIX_STACK \
movl %esp, %eax; \
/* switch to 32bit stack using the pointer on top of 16bit stack */ \
lss %ss:CPU_16BIT_STACK_SIZE-8, %esp; \
/* copy data from 16bit stack to 32bit stack */ \
call fixup_x86_bogus_stack; \
/* put ESP to the proper location */ \
movl %eax, %esp;
#define UNWIND_ESPFIX_STACK \
/* since we are on a wrong stack, we cant make it a C code :( */ \
movl %gs:PDA_cpu, %ebx; \
PER_CPU(cpu_gdt_descr, %ebx); \
movl GDS_address(%ebx), %ebx; \
GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah); \
addl %esp, %eax; \
pushl $__KERNEL_DS; \
CFI_ADJUST_CFA_OFFSET 4; \
pushl %eax; \
CFI_ADJUST_CFA_OFFSET 4; \
lss (%esp), %esp; \
CFI_ADJUST_CFA_OFFSET -8;
#define UNWIND_ESPFIX_STACK \
movl %ss, %eax; \
/* see if on 16bit stack */ \
/* see if on espfix stack */ \
cmpw $__ESPFIX_SS, %ax; \
je 28f; \
27: popl %eax; \
CFI_ADJUST_CFA_OFFSET -4; \
.section .fixup,"ax"; \
28: movl $__KERNEL_DS, %eax; \
jne 27f; \
movl $__KERNEL_DS, %eax; \
movl %eax, %ds; \
movl %eax, %es; \
/* switch to 32bit stack */ \
/* switch to normal stack */ \
FIXUP_ESPFIX_STACK; \
jmp 27b; \
.previous
27:;
/*
* Build the entry stubs and pointer table with
......@@ -608,13 +628,16 @@ KPROBE_ENTRY(page_fault)
CFI_ADJUST_CFA_OFFSET 4
ALIGN
error_code:
/* the function address is in %gs's slot on the stack */
pushl %es
CFI_ADJUST_CFA_OFFSET 4
/*CFI_REL_OFFSET es, 0*/
pushl %ds
CFI_ADJUST_CFA_OFFSET 4
/*CFI_REL_OFFSET ds, 0*/
pushl %eax
CFI_ADJUST_CFA_OFFSET 4
CFI_REL_OFFSET eax, 0
xorl %eax, %eax
pushl %ebp
CFI_ADJUST_CFA_OFFSET 4
CFI_REL_OFFSET ebp, 0
......@@ -627,7 +650,6 @@ error_code:
pushl %edx
CFI_ADJUST_CFA_OFFSET 4
CFI_REL_OFFSET edx, 0
decl %eax # eax = -1
pushl %ecx
CFI_ADJUST_CFA_OFFSET 4
CFI_REL_OFFSET ecx, 0
......@@ -635,18 +657,20 @@ error_code:
CFI_ADJUST_CFA_OFFSET 4
CFI_REL_OFFSET ebx, 0
cld
pushl %es
pushl %gs
CFI_ADJUST_CFA_OFFSET 4
/*CFI_REL_OFFSET es, 0*/
/*CFI_REL_OFFSET gs, 0*/
movl $(__KERNEL_PDA), %ecx
movl %ecx, %gs
UNWIND_ESPFIX_STACK
popl %ecx
CFI_ADJUST_CFA_OFFSET -4
/*CFI_REGISTER es, ecx*/
movl ES(%esp), %edi # get the function address
movl ORIG_EAX(%esp), %edx # get the error code
movl %eax, ORIG_EAX(%esp)
movl %ecx, ES(%esp)
/*CFI_REL_OFFSET es, ES*/
movl PT_GS(%esp), %edi # get the function address
movl PT_ORIG_EAX(%esp), %edx # get the error code
movl $-1, PT_ORIG_EAX(%esp) # no syscall to restart
mov %ecx, PT_GS(%esp)
/*CFI_REL_OFFSET gs, ES*/
movl $(__USER_DS), %ecx
movl %ecx, %ds
movl %ecx, %es
......@@ -682,7 +706,7 @@ ENTRY(device_not_available)
GET_CR0_INTO_EAX
testl $0x4, %eax # EM (math emulation bit)
jne device_not_available_emulate
preempt_stop
preempt_stop(CLBR_ANY)
call math_state_restore
jmp ret_from_exception
device_not_available_emulate:
......@@ -754,7 +778,7 @@ KPROBE_ENTRY(nmi)
cmpw $__ESPFIX_SS, %ax
popl %eax
CFI_ADJUST_CFA_OFFSET -4
je nmi_16bit_stack
je nmi_espfix_stack
cmpl $sysenter_entry,(%esp)
je nmi_stack_fixup
pushl %eax
......@@ -797,7 +821,7 @@ nmi_debug_stack_check:
FIX_STACK(24,nmi_stack_correct, 1)
jmp nmi_stack_correct
nmi_16bit_stack:
nmi_espfix_stack:
/* We have a RING0_INT_FRAME here.
*
* create the pointer to lss back
......@@ -806,7 +830,6 @@ nmi_16bit_stack:
CFI_ADJUST_CFA_OFFSET 4
pushl %esp
CFI_ADJUST_CFA_OFFSET 4
movzwl %sp, %esp
addw $4, (%esp)
/* copy the iret frame of 12 bytes */
.rept 3
......@@ -817,11 +840,11 @@ nmi_16bit_stack:
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
FIXUP_ESPFIX_STACK # %eax == %esp
CFI_ADJUST_CFA_OFFSET -20 # the frame has now moved
xorl %edx,%edx # zero error code
call do_nmi
RESTORE_REGS
lss 12+4(%esp), %esp # back to 16bit stack
lss 12+4(%esp), %esp # back to espfix stack
CFI_ADJUST_CFA_OFFSET -24
1: INTERRUPT_RETURN
CFI_ENDPROC
.section __ex_table,"a"
......@@ -830,6 +853,19 @@ nmi_16bit_stack:
.previous
KPROBE_END(nmi)
#ifdef CONFIG_PARAVIRT
ENTRY(native_iret)
1: iret
.section __ex_table,"a"
.align 4
.long 1b,iret_exc
.previous
ENTRY(native_irq_enable_sysexit)
sti
sysexit
#endif
KPROBE_ENTRY(int3)
RING0_INT_FRAME
pushl $-1 # mark this as an int
......@@ -949,26 +985,27 @@ ENTRY(arch_unwind_init_running)
movl 4(%esp), %edx
movl (%esp), %ecx
leal 4(%esp), %eax
movl %ebx, EBX(%edx)
movl %ebx, PT_EBX(%edx)
xorl %ebx, %ebx
movl %ebx, ECX(%edx)
movl %ebx, EDX(%edx)
movl %esi, ESI(%edx)
movl %edi, EDI(%edx)
movl %ebp, EBP(%edx)
movl %ebx, EAX(%edx)
movl $__USER_DS, DS(%edx)
movl $__USER_DS, ES(%edx)
movl %ebx, ORIG_EAX(%edx)
movl %ecx, EIP(%edx)
movl %ebx, PT_ECX(%edx)
movl %ebx, PT_EDX(%edx)
movl %esi, PT_ESI(%edx)
movl %edi, PT_EDI(%edx)
movl %ebp, PT_EBP(%edx)
movl %ebx, PT_EAX(%edx)
movl $__USER_DS, PT_DS(%edx)
movl $__USER_DS, PT_ES(%edx)
movl $0, PT_GS(%edx)
movl %ebx, PT_ORIG_EAX(%edx)
movl %ecx, PT_EIP(%edx)
movl 12(%esp), %ecx
movl $__KERNEL_CS, CS(%edx)
movl %ebx, EFLAGS(%edx)
movl %eax, OLDESP(%edx)
movl $__KERNEL_CS, PT_CS(%edx)
movl %ebx, PT_EFLAGS(%edx)
movl %eax, PT_OLDESP(%edx)
movl 8(%esp), %eax
movl %ecx, 8(%esp)
movl EBX(%edx), %ebx
movl $__KERNEL_DS, OLDSS(%edx)
movl PT_EBX(%edx), %ebx
movl $__KERNEL_DS, PT_OLDSS(%edx)
jmpl *%eax
CFI_ENDPROC
ENDPROC(arch_unwind_init_running)
......
arch/i386/kernel/head.S
浏览文件 @ 4522d582
......@@ -55,6 +55,12 @@
*/
ENTRY(startup_32)
#ifdef CONFIG_PARAVIRT
movl %cs, %eax
testl $0x3, %eax
jnz startup_paravirt
#endif
/*
* Set segments to known values.
*/
......@@ -302,6 +308,7 @@ is386: movl $2,%ecx # set MP
movl %eax,%cr0
call check_x87
call setup_pda
lgdt cpu_gdt_descr
lidt idt_descr
ljmp $(__KERNEL_CS),$1f
......@@ -312,10 +319,13 @@ is386: movl $2,%ecx # set MP
movl %eax,%ds
movl %eax,%es
xorl %eax,%eax # Clear FS/GS and LDT
xorl %eax,%eax # Clear FS and LDT
movl %eax,%fs
movl %eax,%gs
lldt %ax
movl $(__KERNEL_PDA),%eax
mov %eax,%gs
cld # gcc2 wants the direction flag cleared at all times
pushl $0 # fake return address for unwinder
#ifdef CONFIG_SMP
......@@ -345,6 +355,23 @@ check_x87:
.byte 0xDB,0xE4 /* fsetpm for 287, ignored by 387 */
ret
/*
* Point the GDT at this CPU's PDA. On boot this will be
* cpu_gdt_table and boot_pda; for secondary CPUs, these will be
* that CPU's GDT and PDA.
*/
setup_pda:
/* get the PDA pointer */
movl start_pda, %eax
/* slot the PDA address into the GDT */
mov cpu_gdt_descr+2, %ecx
mov %ax, (__KERNEL_PDA+0+2)(%ecx) /* base & 0x0000ffff */
shr $16, %eax
mov %al, (__KERNEL_PDA+4+0)(%ecx) /* base & 0x00ff0000 */
mov %ah, (__KERNEL_PDA+4+3)(%ecx) /* base & 0xff000000 */
ret
/*
* setup_idt
*
......@@ -465,6 +492,33 @@ ignore_int:
#endif
iret
#ifdef CONFIG_PARAVIRT
startup_paravirt:
cld
movl $(init_thread_union+THREAD_SIZE),%esp
/* We take pains to preserve all the regs. */
pushl %edx
pushl %ecx
pushl %eax
/* paravirt.o is last in link, and that probe fn never returns */
pushl $__start_paravirtprobe
1:
movl 0(%esp), %eax
pushl (%eax)
movl 8(%esp), %eax
call *(%esp)
popl %eax
movl 4(%esp), %eax
movl 8(%esp), %ecx
movl 12(%esp), %edx
addl $4, (%esp)
jmp 1b
#endif
/*
* Real beginning of normal "text" segment
*/
......@@ -484,6 +538,8 @@ ENTRY(empty_zero_page)
* This starts the data section.
*/
.data
ENTRY(start_pda)
.long boot_pda
ENTRY(stack_start)
.long init_thread_union+THREAD_SIZE
......@@ -525,7 +581,7 @@ idt_descr:
# boot GDT descriptor (later on used by CPU#0):
.word 0 # 32 bit align gdt_desc.address
cpu_gdt_descr:
ENTRY(cpu_gdt_descr)
.word GDT_ENTRIES*8-1
.long cpu_gdt_table
......@@ -584,8 +640,8 @@ ENTRY(cpu_gdt_table)
.quad 0x00009a000000ffff /* 0xc0 APM CS 16 code (16 bit) */
.quad 0x004092000000ffff /* 0xc8 APM DS data */
.quad 0x0000920000000000 /* 0xd0 - ESPFIX 16-bit SS */
.quad 0x0000000000000000 /* 0xd8 - unused */
.quad 0x00c0920000000000 /* 0xd0 - ESPFIX SS */
.quad 0x00cf92000000ffff /* 0xd8 - PDA */
.quad 0x0000000000000000 /* 0xe0 - unused */
.quad 0x0000000000000000 /* 0xe8 - unused */
.quad 0x0000000000000000 /* 0xf0 - unused */
......
arch/i386/kernel/hpet.c
浏览文件 @ 4522d582
......@@ -34,6 +34,7 @@ static int __init init_hpet_clocksource(void)
unsigned long hpet_period;
void __iomem* hpet_base;
u64 tmp;
int err;
if (!is_hpet_enabled())
return -ENODEV;
......@@ -61,7 +62,11 @@ static int __init init_hpet_clocksource(void)
do_div(tmp, FSEC_PER_NSEC);
clocksource_hpet.mult = (u32)tmp;
return clocksource_register(&clocksource_hpet);
err = clocksource_register(&clocksource_hpet);
if (err)
iounmap(hpet_base);
return err;
}
module_init(init_hpet_clocksource);
arch/i386/kernel/i8259.c
浏览文件 @ 4522d582
......@@ -381,7 +381,10 @@ void __init init_ISA_irqs (void)
}
}
void __init init_IRQ(void)
/* Overridden in paravirt.c */
void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
void __init native_init_IRQ(void)
{
int i;
......
arch/i386/kernel/io_apic.c
浏览文件 @ 4522d582
......@@ -154,14 +154,20 @@ static struct IO_APIC_route_entry ioapic_read_entry(int apic, int pin)
* the interrupt, and we need to make sure the entry is fully populated
* before that happens.
*/
static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
static void
__ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
{
unsigned long flags;
union entry_union eu;
eu.entry = e;
spin_lock_irqsave(&ioapic_lock, flags);
io_apic_write(apic, 0x11 + 2*pin, eu.w2);
io_apic_write(apic, 0x10 + 2*pin, eu.w1);
}
static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
{
unsigned long flags;
spin_lock_irqsave(&ioapic_lock, flags);
__ioapic_write_entry(apic, pin, e);
spin_unlock_irqrestore(&ioapic_lock, flags);
}
......@@ -837,8 +843,7 @@ static int __init find_isa_irq_pin(int irq, int type)
if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
mp_bus_id_to_type[lbus] == MP_BUS_MCA ||
mp_bus_id_to_type[lbus] == MP_BUS_NEC98
mp_bus_id_to_type[lbus] == MP_BUS_MCA
) &&
(mp_irqs[i].mpc_irqtype == type) &&
(mp_irqs[i].mpc_srcbusirq == irq))
......@@ -857,8 +862,7 @@ static int __init find_isa_irq_apic(int irq, int type)
if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
mp_bus_id_to_type[lbus] == MP_BUS_MCA ||
mp_bus_id_to_type[lbus] == MP_BUS_NEC98
mp_bus_id_to_type[lbus] == MP_BUS_MCA
) &&
(mp_irqs[i].mpc_irqtype == type) &&
(mp_irqs[i].mpc_srcbusirq == irq))
......@@ -988,12 +992,6 @@ static int EISA_ELCR(unsigned int irq)
#define default_MCA_trigger(idx) (1)
#define default_MCA_polarity(idx) (0)
/* NEC98 interrupts are always polarity zero edge triggered,
* when listed as conforming in the MP table. */
#define default_NEC98_trigger(idx) (0)
#define default_NEC98_polarity(idx) (0)
static int __init MPBIOS_polarity(int idx)
{
int bus = mp_irqs[idx].mpc_srcbus;
......@@ -1028,11 +1026,6 @@ static int __init MPBIOS_polarity(int idx)
polarity = default_MCA_polarity(idx);
break;
}
case MP_BUS_NEC98: /* NEC 98 pin */
{
polarity = default_NEC98_polarity(idx);
break;
}
default:
{
printk(KERN_WARNING "broken BIOS!!\n");
......@@ -1102,11 +1095,6 @@ static int MPBIOS_trigger(int idx)
trigger = default_MCA_trigger(idx);
break;
}
case MP_BUS_NEC98: /* NEC 98 pin */
{
trigger = default_NEC98_trigger(idx);
break;
}
default:
{
printk(KERN_WARNING "broken BIOS!!\n");
......@@ -1168,7 +1156,6 @@ static int pin_2_irq(int idx, int apic, int pin)
case MP_BUS_ISA: /* ISA pin */
case MP_BUS_EISA:
case MP_BUS_MCA:
case MP_BUS_NEC98:
{
irq = mp_irqs[idx].mpc_srcbusirq;
break;
......@@ -1236,7 +1223,7 @@ static inline int IO_APIC_irq_trigger(int irq)
}
/* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
u8 irq_vector[NR_IRQ_VECTORS] __read_mostly = { FIRST_DEVICE_VECTOR , 0 };
static u8 irq_vector[NR_IRQ_VECTORS] __read_mostly = { FIRST_DEVICE_VECTOR , 0 };
static int __assign_irq_vector(int irq)
{
......@@ -1361,8 +1348,8 @@ static void __init setup_IO_APIC_irqs(void)
if (!apic && (irq < 16))
disable_8259A_irq(irq);
}
ioapic_write_entry(apic, pin, entry);
spin_lock_irqsave(&ioapic_lock, flags);
__ioapic_write_entry(apic, pin, entry);
set_native_irq_info(irq, TARGET_CPUS);
spin_unlock_irqrestore(&ioapic_lock, flags);
}
......@@ -1927,6 +1914,15 @@ static void __init setup_ioapic_ids_from_mpc(void)
static void __init setup_ioapic_ids_from_mpc(void) { }
#endif
static int no_timer_check __initdata;
static int __init notimercheck(char *s)
{
no_timer_check = 1;
return 1;
}
__setup("no_timer_check", notimercheck);
/*
* There is a nasty bug in some older SMP boards, their mptable lies
* about the timer IRQ. We do the following to work around the situation:
......@@ -1935,10 +1931,13 @@ static void __init setup_ioapic_ids_from_mpc(void) { }
* - if this function detects that timer IRQs are defunct, then we fall
* back to ISA timer IRQs
*/
static int __init timer_irq_works(void)
int __init timer_irq_works(void)
{
unsigned long t1 = jiffies;
if (no_timer_check)
return 1;
local_irq_enable();
/* Let ten ticks pass... */
mdelay((10 * 1000) / HZ);
......@@ -2162,9 +2161,15 @@ static inline void unlock_ExtINT_logic(void)
unsigned char save_control, save_freq_select;
pin = find_isa_irq_pin(8, mp_INT);
if (pin == -1) {
WARN_ON_ONCE(1);
return;
}
apic = find_isa_irq_apic(8, mp_INT);
if (pin == -1)
if (apic == -1) {
WARN_ON_ONCE(1);
return;
}
entry0 = ioapic_read_entry(apic, pin);
clear_IO_APIC_pin(apic, pin);
......@@ -2209,7 +2214,7 @@ int timer_uses_ioapic_pin_0;
* is so screwy. Thanks to Brian Perkins for testing/hacking this beast
* fanatically on his truly buggy board.
*/
static inline void check_timer(void)
static inline void __init check_timer(void)
{
int apic1, pin1, apic2, pin2;
int vector;
......@@ -2857,8 +2862,8 @@ int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int a
if (!ioapic && (irq < 16))
disable_8259A_irq(irq);
ioapic_write_entry(ioapic, pin, entry);
spin_lock_irqsave(&ioapic_lock, flags);
__ioapic_write_entry(ioapic, pin, entry);
set_native_irq_info(irq, TARGET_CPUS);
spin_unlock_irqrestore(&ioapic_lock, flags);
......
arch/i386/kernel/ldt.c
浏览文件 @ 4522d582
......@@ -160,16 +160,14 @@ static int read_default_ldt(void __user * ptr, unsigned long bytecount)
{
int err;
unsigned long size;
void *address;
err = 0;
address = &default_ldt[0];
size = 5*sizeof(struct desc_struct);
if (size > bytecount)
size = bytecount;
err = size;
if (copy_to_user(ptr, address, size))
if (clear_user(ptr, size))
err = -EFAULT;
return err;
......
arch/i386/kernel/mca.c
浏览文件 @ 4522d582
......@@ -283,10 +283,9 @@ static int __init mca_init(void)
bus->f.mca_transform_memory = mca_dummy_transform_memory;
/* get the motherboard device */
mca_dev = kmalloc(sizeof(struct mca_device), GFP_KERNEL);
mca_dev = kzalloc(sizeof(struct mca_device), GFP_KERNEL);
if(unlikely(!mca_dev))
goto out_nomem;
memset(mca_dev, 0, sizeof(struct mca_device));
/*
* We do not expect many MCA interrupts during initialization,
......@@ -310,11 +309,9 @@ static int __init mca_init(void)
mca_dev->slot = MCA_MOTHERBOARD;
mca_register_device(MCA_PRIMARY_BUS, mca_dev);
mca_dev = kmalloc(sizeof(struct mca_device), GFP_ATOMIC);
mca_dev = kzalloc(sizeof(struct mca_device), GFP_ATOMIC);
if(unlikely(!mca_dev))
goto out_unlock_nomem;
memset(mca_dev, 0, sizeof(struct mca_device));
/* Put motherboard into video setup mode, read integrated video
* POS registers, and turn motherboard setup off.
......@@ -349,10 +346,9 @@ static int __init mca_init(void)
}
if(which_scsi) {
/* found a scsi card */
mca_dev = kmalloc(sizeof(struct mca_device), GFP_ATOMIC);
mca_dev = kzalloc(sizeof(struct mca_device), GFP_ATOMIC);
if(unlikely(!mca_dev))
goto out_unlock_nomem;
memset(mca_dev, 0, sizeof(struct mca_device));
for(j = 0; j < 8; j++)
mca_dev->pos[j] = pos[j];
......@@ -378,10 +374,9 @@ static int __init mca_init(void)
if(!mca_read_and_store_pos(pos))
continue;
mca_dev = kmalloc(sizeof(struct mca_device), GFP_ATOMIC);
mca_dev = kzalloc(sizeof(struct mca_device), GFP_ATOMIC);
if(unlikely(!mca_dev))
goto out_unlock_nomem;
memset(mca_dev, 0, sizeof(struct mca_device));
for(j=0; j<8; j++)
mca_dev->pos[j]=pos[j];
......
arch/i386/kernel/module.c
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arch/i386/kernel/mpparse.c
浏览文件 @ 4522d582
......@@ -249,8 +249,6 @@ static void __init MP_bus_info (struct mpc_config_bus *m)
mp_current_pci_id++;
} else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA)-1) == 0) {
mp_bus_id_to_type[m->mpc_busid] = MP_BUS_MCA;
} else if (strncmp(str, BUSTYPE_NEC98, sizeof(BUSTYPE_NEC98)-1) == 0) {
mp_bus_id_to_type[m->mpc_busid] = MP_BUS_NEC98;
} else {
printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
}
......
arch/i386/kernel/msr.c
浏览文件 @ 4522d582
......@@ -195,7 +195,6 @@ static ssize_t msr_write(struct file *file, const char __user *buf,
{
const u32 __user *tmp = (const u32 __user *)buf;
u32 data[2];
size_t rv;
u32 reg = *ppos;
int cpu = iminor(file->f_dentry->d_inode);
int err;
......@@ -203,7 +202,7 @@ static ssize_t msr_write(struct file *file, const char __user *buf,
if (count % 8)
return -EINVAL; /* Invalid chunk size */
for (rv = 0; count; count -= 8) {
for (; count; count -= 8) {
if (copy_from_user(&data, tmp, 8))
return -EFAULT;
err = do_wrmsr(cpu, reg, data[0], data[1]);
......
arch/i386/kernel/nmi.c
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arch/i386/kernel/paravirt.c 0 → 100644
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arch/i386/kernel/pci-dma.c
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arch/i386/kernel/process.c
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arch/i386/kernel/ptrace.c
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arch/i386/kernel/quirks.c
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arch/i386/kernel/setup.c
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arch/i386/kernel/signal.c
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arch/i386/kernel/smp.c
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arch/i386/kernel/smpboot.c
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arch/i386/kernel/sysenter.c
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arch/i386/kernel/time.c
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arch/i386/kernel/time_hpet.c
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arch/i386/kernel/tsc.c
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arch/i386/mach-generic/probe.c
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arch/i386/math-emu/reg_ld_str.c
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arch/i386/pci/early.c
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arch/i386/pci/irq.c
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arch/i386/pci/pcbios.c
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arch/ia64/kernel/topology.c
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arch/m68knommu/kernel/vmlinux.lds.S
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arch/powerpc/kernel/sysfs.c
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arch/x86_64/Kconfig
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arch/x86_64/Makefile
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arch/x86_64/ia32/ia32_signal.c
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arch/x86_64/kernel/apic.c
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arch/x86_64/kernel/early-quirks.c
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arch/x86_64/kernel/entry.S
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arch/x86_64/kernel/genapic.c
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arch/x86_64/kernel/head64.c
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arch/x86_64/kernel/i387.c
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arch/x86_64/kernel/i8259.c
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arch/x86_64/kernel/io_apic.c
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arch/x86_64/kernel/irq.c
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arch/x86_64/kernel/mce.c
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arch/x86_64/kernel/mpparse.c
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arch/x86_64/kernel/nmi.c
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arch/x86_64/kernel/pci-calgary.c
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arch/x86_64/kernel/pci-dma.c
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arch/x86_64/kernel/pci-gart.c
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arch/x86_64/kernel/process.c
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arch/x86_64/kernel/setup.c
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arch/x86_64/kernel/smp.c
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arch/x86_64/kernel/smpboot.c
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arch/x86_64/kernel/traps.c
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arch/x86_64/kernel/vmlinux.lds.S
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arch/x86_64/kernel/vsyscall.c
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arch/x86_64/lib/csum-partial.c
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arch/x86_64/lib/delay.c
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arch/x86_64/mm/fault.c
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arch/x86_64/mm/init.c
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arch/x86_64/mm/pageattr.c
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drivers/base/cpu.c
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drivers/net/de600.c
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drivers/pnp/pnpbios/core.c
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fs/compat_ioctl.c
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include/asm-generic/vmlinux.lds.h
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include/asm-i386/alternative.h
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include/asm-i386/apic.h
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include/asm-i386/atomic.h
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include/asm-i386/elf.h
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include/asm-i386/genapic.h
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include/asm-i386/io.h
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include/asm-i386/irqflags.h
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include/asm-i386/module.h
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include/asm-i386/nmi.h
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include/asm-i386/page.h
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include/asm-i386/paravirt.h 0 → 100644
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include/asm-i386/pda.h 0 → 100644
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include/asm-i386/percpu.h
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include/asm-i386/pgtable.h
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include/asm-i386/processor.h
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include/asm-i386/segment.h
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include/asm-i386/spinlock.h
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include/asm-i386/tlbflush.h
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include/asm-i386/unwind.h
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include/asm-i386/vm86.h
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include/asm-x86_64/Kbuild
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include/asm-x86_64/alternative.h
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include/asm-x86_64/atomic.h
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include/asm-x86_64/calgary.h
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include/asm-x86_64/cpufeature.h
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include/asm-x86_64/delay.h
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include/asm-x86_64/genapic.h
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include/asm-x86_64/msr.h
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include/asm-x86_64/pci-direct.h
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include/asm-x86_64/pgtable.h
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include/asm-x86_64/processor.h
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include/asm-x86_64/proto.h
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include/asm-x86_64/smp.h
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include/asm-x86_64/spinlock.h
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include/asm-x86_64/stacktrace.h
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include/asm-x86_64/vsyscall.h
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lib/spinlock_debug.c
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scripts/kallsyms.c
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