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  1. 21 11月, 2013 11 次提交
  3. 20 11月, 2013 9 次提交
  5. 19 11月, 2013 2 次提交
  7. 18 11月, 2013 1 次提交
  9. 17 11月, 2013 17 次提交
    • G
      um: Remove unused declarations from <as-layout.h> · 33a7d429
      由 Geert Uytterhoeven 提交于 
      _end is used, but it's already provided by <asm/sections.h>, so use that.
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: user-mode-linux-devel@lists.sourceforge.net
Signed-off-by: NRichard Weinberger <richard@nod.at>
      33a7d429
    • M
      um: remove used STDIO_CONSOLE Kconfig param · a851aebc
      由 Michael Opdenacker 提交于 
      This removes the STDIO_CONSOLE Kconfig parameter which
is defined but no longer used anywhere in the makefiles and source code.
Signed-off-by: NMichael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: NRichard Weinberger <richard@nod.at>
      a851aebc
    • R
      um/vdso: add .gitignore for a couple of targets · b13a9bfc
      由 Ramkumar Ramachandra 提交于 
      Cc: Richard Weinberger <richard@nod.at>
Signed-off-by: NRamkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: NRichard Weinberger <richard@nod.at>
      b13a9bfc
    • R
      arch/um: make it work with defconfig and x86_64 · e40f04d0
      由 Ramkumar Ramachandra 提交于 
      arch/um/defconfig only lists one default configuration, and that applies
only to the i386 architecture.  Replace it with two minimal
configuration files generated using `make savedefconfig`:

  i386_defconfig and x86_64_defconfig

The build scripts now require two updates:

1. um's Kconfig (arch/x86/um/Kconfig) should specify an ARCH_DEFCONFIG
   section explicitly pointing to these scripts if the required
   variables are set.  Take care to remove the DEFCONFIG_LIST section
   defined in the included file arch/um/Kconfig.common.

2. um's Makefile (arch/um/Makefile) should set KBUILD_DEFCONFIG properly
   for the top-level Makefile to pick up.  Copy the logic in
   arch/x86/Makefile to properly pick the defconfig file depending on
   the actual architecture; except we're working with $SUBARCH here,
   instead of $ARCH.

Now, you can do:

  $ ARCH=um make defconfig
  $ ARCH=um make

and successfully build User-Mode Linux on an x86_64 box in default
configuration.

Cc: Richard Weinberger <richard@nod.at>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: NRamkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: NRichard Weinberger <richard@nod.at>
      e40f04d0
    • R
      um: Make kstack_depth_to_print conform to arch/x86 · e96d1c36
      由 Richard Weinberger 提交于 
      Signed-off-by: NRichard Weinberger <richard@nod.at>
      e96d1c36
    • R
      um: Get rid of thread_struct->saved_task · a1850e9c
      由 Richard Weinberger 提交于 
      As we have a sane show_stack() now, we can drop
the ->saved_task hack.
Signed-off-by: NRichard Weinberger <richard@nod.at>
      a1850e9c
    • R
      um: Make stack trace reliable against kernel mode faults · f72c22e4
      由 Richard Weinberger 提交于 
      As UML uses an alternative signal stack we cannot use
the current stack pointer for stack dumping if UML itself
dies by SIGSEGV. To bypass this issue we save regs taken
from mcontext in our segv handler into thread_struct and
use these regs to obtain the stack pointer in show_stack().
Signed-off-by: NRichard Weinberger <richard@nod.at>
      f72c22e4
    • R
      um: Rewrite show_stack() · 9d1ee8ce
      由 Richard Weinberger 提交于 
      Currently on UML stack traces are not very reliable and both
x86 and x86_64 have their on implementations.
This patch unifies both and adds support to outline unreliable
functions calls.
Signed-off-by: NRichard Weinberger <richard@nod.at>
      9d1ee8ce
    • J
      alpha: Prevent a NULL ptr dereference in csum_partial_copy. · 5cfe8f1b
      由 Jay Estabrook 提交于 
      Introduced by 3ddc5b46 ("kernel-wide: fix missing validations
on __get/__put/__copy_to/__copy_from_user()").

Also fix some other places which could be problematic in a similar way,
although they hadn't been proved so, as far as I can tell.

Cc: Michael Cree <mcree@orcon.net.nz>
Signed-off-by: NMatt Turner <mattst88@gmail.com>
      5cfe8f1b
    • W
      alpha: perf: fix out-of-bounds array access triggered from raw event · 6e22f8f2
      由 Will Deacon 提交于 
      Vince's perf fuzzer uncovered the following issue on Alpha:

Unable to handle kernel paging request at virtual address fffffbfe4e46a0e8
CPU 0 perf_fuzzer(1278): Oops 0
pc = [<fffffc000031fbc0>]  ra = [<fffffc000031ff54>]  ps = 0007    Not tainted
pc is at alpha_perf_event_set_period+0x60/0xf0
ra is at alpha_pmu_enable+0x1a4/0x1c0
v0 = 0000000000000000  t0 = 00000000000fffff  t1 = fffffc007b3f5800
t2 = fffffbff275faa94  t3 = ffffffffc9b9bd89  t4 = fffffbfe4e46a098
t5 = 0000000000000020  t6 = fffffbfe4e46a0b8  t7 = fffffc007f4c8000
s0 = 0000000000000000  s1 = fffffc0001b0c018  s2 = fffffc0001b0c020
s3 = fffffc007b3f5800  s4 = 0000000000000001  s5 = ffffffffc9b9bd85
s6 = 0000000000000001
a0 = 0000000000000006  a1 = fffffc007b3f5908  a2 = fffffbfe4e46a098
a3 = 00000005000108c0  a4 = 0000000000000000  a5 = 0000000000000000
t8 = 0000000000000001  t9 = 0000000000000001  t10= 0000000027829f6f
t11= 0000000000000020  pv = fffffc000031fb60  at = fffffc0000950900
gp = fffffc0000940900  sp = fffffc007f4cbca8
Disabling lock debugging due to kernel taint
Trace:
[<fffffc000031ff54>] alpha_pmu_enable+0x1a4/0x1c0
[<fffffc000039f4e8>] perf_pmu_enable+0x48/0x60
[<fffffc00003a0d6c>] __perf_install_in_context+0x15c/0x230
[<fffffc000039d1f0>] remote_function+0x80/0xa0
[<fffffc00003a0c10>] __perf_install_in_context+0x0/0x230
[<fffffc000037b7e4>] smp_call_function_single+0x1b4/0x1d0
[<fffffc000039bb70>] task_function_call+0x60/0x80
[<fffffc00003a0c10>] __perf_install_in_context+0x0/0x230
[<fffffc000039bb44>] task_function_call+0x34/0x80
[<fffffc000039d3fc>] perf_install_in_context+0x9c/0x150
[<fffffc00003a0c10>] __perf_install_in_context+0x0/0x230
[<fffffc00003a5100>] SYSC_perf_event_open+0x360/0xac0
[<fffffc00003110c4>] entSys+0xa4/0xc0

This is due to the raw event encoding being used as an index directly
into the ev67_mapping array, rather than being validated against the
ev67_pmc_event_type enumeration instead. Unlike other architectures,
which allow raw events to propagate into the hardware counters with
little interference, the limited number of events on Alpha and the
strict event <-> counter relationships mean that raw events actually
correspond to the Linux-specific Alpha events, rather than anything
defined by the architecture.

This patch adds a new callback to alpha_pmu_t for validating the raw
event encoding with the Linux event types for the PMU, preventing the
out-of-bounds array access.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: NMichael Cree <mcree@orcon.net.nz>
Acked-by: NMatt Turner <mattst88@gmail.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
      6e22f8f2
    • R
      alpha: Use qemu+cserve provided high-res clock and alarm. · 4914d7b4
      由 Richard Henderson 提交于 
      QEMU provides a high-resolution timer and alarm; use this for
a clock source and clock event source when available.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
      4914d7b4
    • R
      alpha: Switch to GENERIC_CLOCKEVENTS · a1659d6d
      由 Richard Henderson 提交于 
      This allows us to get rid of some hacky code for SMP.  Get rid of
some cycle counter hackery that's now handled by generic code via
clocksource + clock_event_device objects.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
      a1659d6d
    • R
      alpha: Enable the rpcc clocksource for single processor · db2d3260
      由 Richard Henderson 提交于 
      Don't depend on SMP, just check the number of processors online.
This allows a single distribution kernel to use the clocksource
when run on a single processor machine.  Do depend on whether or
not we're using WTINT.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
      db2d3260
    • R
      alpha: Reorganize rtc handling · 85d0b3a5
      由 Richard Henderson 提交于 
      Discontinue use of GENERIC_CMOS_UPDATE; rely on the RTC subsystem.

The marvel platform requires that the rtc only be touched from the
boot cpu.  This had been partially implemented with hooks for
get/set_rtc_time, but read/update_persistent_clock were not handled.
Move the hooks from the machine_vec to a special rtc_class_ops struct.

We had read_persistent_clock managing the epoch against which the
rtc hw is based, but this didn't apply to get_rtc_time or set_rtc_time.
This resulted in incorrect values when hwclock(8) gets involved.

Allow the epoch to be set from the kernel command-line, overriding
the autodetection, which is doomed to fail in 2020.  Further, by
implementing the rtc ioctl function, we can expose this epoch to
userland.

Elide the alarm functions that RTC_DRV_CMOS implements.  This was
highly questionable on Alpha, since the interrupt is used by the
system timer.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
      85d0b3a5
    • R
      alpha: Primitive support for CPU power down. · 7f3bbb82
      由 Richard Henderson 提交于 
      Use WTINT to wait for the next interrupt.  Squash the WTINT call
if the PALcode doesn't support it (e.g. MILO).  No attempt is yet
made to skip clock ticks during normal scheduling in order to stay
in power down mode longer.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
      7f3bbb82
    • R
      alpha: Allow HZ to be configured · fddd87d6
      由 Richard Henderson 提交于 
      With the 1024Hz default, we spend 50% of QEMU emulation
processing timer interrupts.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
      fddd87d6
    • R
      alpha: Notice if we're being run under QEMU · 994dcf70
      由 Richard Henderson 提交于 
      When building a generic kernel, do a run-time check on the serial
number, like we do for MILO.  When building a custom kernel, make
this a configure-time check.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
      994dcf70