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| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2008-07-29 10:29:24 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-30 19:49:27 +0200 |
| commit | bdd8caba5ed5bb7ee21c9f061597284ffeb280bf (patch) | |
| tree | 036491dc4b283979f462008bc961800847187937 /include/asm-x86/processor.h | |
| parent | 9dc89c0f96a6ce6a1b7f9a47dd8bf6f17e2002c9 (diff) | |
| download | lwn-bdd8caba5ed5bb7ee21c9f061597284ffeb280bf.tar.gz lwn-bdd8caba5ed5bb7ee21c9f061597284ffeb280bf.zip | |
x86, xsave: struct _fpstate extensions to include extended state information
Bytes 464..511 in the current 512byte layout of fxsave/fxrstor
frame, are reserved for SW usage. On cpu's supporting xsave/xrstor, these bytes
are used to extended the fpstate pointer in the sigcontext, which now includes
the extended state information along with fpstate information.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/processor.h')
| -rw-r--r-- | include/asm-x86/processor.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h index 77b7af6b573b..eb4bd8c07730 100644 --- a/include/asm-x86/processor.h +++ b/include/asm-x86/processor.h @@ -322,7 +322,12 @@ struct i387_fxsave_struct { /* 16*16 bytes for each XMM-reg = 256 bytes: */ u32 xmm_space[64]; - u32 padding[24]; + u32 padding[12]; + + union { + u32 padding1[12]; + u32 sw_reserved[12]; + }; } __attribute__((aligned(16))); |