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  1. 09 7月, 2008 18 次提交
  3. 03 7月, 2008 11 次提交
  5. 01 7月, 2008 11 次提交
    • M
      powerpc: Update for VSX core file and ptrace · f3e909c2
      由 Michael Neuling 提交于 
      This correctly hooks the VSX dump into Roland McGrath core file
infrastructure.  It adds the VSX dump information as an additional elf
note in the core file (after talking more to the tool chain/gdb guys).
This also ensures the formats are consistent between signals, ptrace
and core files.
Signed-off-by: NMichael Neuling <mikey@neuling.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      f3e909c2
    • M
      powerpc: Fix compile error for CONFIG_VSX · 436db693
      由 Michael Neuling 提交于 
      Fix compile error when CONFIG_VSX is enabled.

arch/powerpc/kernel/signal_64.c: In function 'restore_sigcontext':
arch/powerpc/kernel/signal_64.c:241: error: 'i' undeclared (first use in this function)
Signed-off-by: NMichael Neuling <mikey@neuling.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      436db693
    • E
      powerpc: Keep 3 high personality bytes across exec · a91a03ee
      由 Eric B Munson 提交于 
      Currently when a 32 bit process is exec'd on a powerpc 64 bit host the
value in the top three bytes of the personality is clobbered.  patch
adds a check in the SET_PERSONALITY macro that will carry all the
values in the top three bytes across the exec.

These three bytes currently carry flags to disable address randomisation,
limit the address space, force zeroing of an mmapped page, etc.  Should an
application set any of these bits they will be maintained and honoured on
homogeneous environment but discarded and ignored on a heterogeneous
environment.  So if an application requires all mmapped pages to be initialised
to zero and a wrapper is used to setup the personality and exec the target,
these flags will remain set on an all 32 or all 64 bit envrionment, but they
will be lost in the exec on a mixed 32/64 bit environment.  Losing these bits
means that the same application would behave differently in different
environments.  Tested on a POWER5+ machine with 64bit kernel and a mixed
64/32 bit user space.
Signed-off-by: NEric B Munson <ebmunson@us.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      a91a03ee
    • B
      powerpc: Make sure that include/asm-powerpc/spinlock.h does not trigger compilation warnings · 89b5810f
      由 Bart Van Assche 提交于 
      When compiling kernel modules for ppc that include <linux/spinlock.h>,
gcc prints a warning message every time it encounters a function
declaration where the inline keyword appears after the return type.
This makes sure that the order of the inline keyword and the return
type is as gcc expects it.  Additionally, the __inline__ keyword is
replaced by inline, as checkpatch expects.
Signed-off-by: NBart Van Assche <bart.vanassche@gmail.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      89b5810f
    • S
      powerpc: Explicitly copy elements of pt_regs · fcbc5a97
      由 Stephen Rothwell 提交于 
      Gcc 4.3 produced this warning:

arch/powerpc/kernel/signal_64.c: In function 'restore_sigcontext':
arch/powerpc/kernel/signal_64.c:161: warning: array subscript is above array bounds

This is caused by us copying to aliases of elements of the pt_regs
structure.  Make those explicit.

This adds one extra __get_user and unrolls a loop.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      fcbc5a97
    • B
      powerpc: Remove experimental status of kdump on 64-bit powerpc · 3420b5da
      由 Bernhard Walle 提交于 
      This removes the experimental status of kdump on PPC64.  kdump is on
PPC64 now since more than one year and it has proven to be stable.
Signed-off-by: NBernhard Walle <bwalle@suse.de>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      3420b5da
    • A
      powerpc: Add 64 bit version of huge_ptep_set_wrprotect · 016b33c4
      由 Andy Whitcroft 提交于 
      The implementation of huge_ptep_set_wrprotect() directly calls
ptep_set_wrprotect() to mark a hugepte write protected.  However this
call is not appropriate on ppc64 kernels as this is a small page only
implementation.  This can lead to the hash not being flushed correctly
when a mapping is being converted to COW, allowing processes to continue
using the original copy.

Currently huge_ptep_set_wrprotect() unconditionally calls
ptep_set_wrprotect().  This is fine on ppc32 kernels as this call is
generic.  On 64 bit this is implemented as:

	pte_update(mm, addr, ptep, _PAGE_RW, 0);

On ppc64 this last parameter is the page size and is passed directly on
to hpte_need_flush():

	hpte_need_flush(mm, addr, ptep, old, huge);

And this directly affects the page size we pass to flush_hash_page():

	flush_hash_page(vaddr, rpte, psize, ssize, 0);

As this changes the way the hash is calculated we will flush the wrong
pages, potentially leaving live hashes to the original page.

Move the definition of huge_ptep_set_wrprotect() to the 32/64 bit specific
headers.
Signed-off-by: NAndy Whitcroft <apw@shadowen.org>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      016b33c4
    • A
      powerpc: Prevent memory corruption due to cache invalidation of unaligned DMA buffer · 03d70617
      由 Andrew Lewis 提交于 
      On PowerPC processors with non-coherent cache architectures the DMA
subsystem calls invalidate_dcache_range() before performing a DMA read
operation.  If the address and length of the DMA buffer are not aligned
to a cache-line boundary this can result in memory outside of the DMA
buffer being invalidated in the cache.  If this memory has an
uncommitted store then the data will be lost and a subsequent read of
that address will result in an old value being returned from main memory.

Only when the DMA buffer starts on a cache-line boundary and is an exact
mutiple of the cache-line size can invalidate_dcache_range() be called,
otherwise flush_dcache_range() must be called.  flush_dcache_range()
will first flush uncommitted writes, and then invalidate the cache.

Signed-off-by: Andrew Lewis <andrew-lewis at netspace.net.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      03d70617
    • K
      powerpc/bootwrapper: Pad .dtb by default · 9d4ae9fc
      由 Kumar Gala 提交于 
      Since most bootloaders or wrappers tend to update or add some information
to the .dtb they a handled they need some working space to do that in.

By default add 1K of padding via a default setting of DTS_FLAGS.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      9d4ae9fc
    • M
      powerpc: Add CONFIG_VSX config option · 96d5b52c
      由 Michael Neuling 提交于 
      Add CONFIG_VSX config build option.  Must compile with POWER4, FPU and ALTIVEC.
Signed-off-by: NMichael Neuling <mikey@neuling.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      96d5b52c
    • M
      powerpc: Add VSX context save/restore, ptrace and signal support · ce48b210
      由 Michael Neuling 提交于 
      This patch extends the floating point save and restore code to use the
VSX load/stores when VSX is available.  This will make FP context
save/restore marginally slower on FP only code, when VSX is available,
as it has to load/store 128bits rather than just 64bits.

Mixing FP, VMX and VSX code will get constant architected state.

The signals interface is extended to enable access to VSR 0-31
doubleword 1 after discussions with tool chain maintainers.  Backward
compatibility is maintained.

The ptrace interface is also extended to allow access to VSR 0-31 full
registers.
Signed-off-by: NMichael Neuling <mikey@neuling.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      ce48b210