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authorFenghua Yu <fenghua.yu@intel.com>2014-05-29 22:12:33 +0400
committerH. Peter Anvin <hpa@linux.intel.com>2014-05-30 01:31:10 +0400
commit0b29643a58439dc9a8b0c0cacad0e7cb608c8199 (patch)
treec5ac58a5d2d9b55eb6d6404b85befa6353ac681c /arch/x86/include
parent5b3e83f46a2a7e8625258dbf84a26e7f4032bfa8 (diff)
downloadlinux-0b29643a58439dc9a8b0c0cacad0e7cb608c8199.tar.xz
x86/xsaves: Change compacted format xsave area header
The XSAVE area header is changed to support both compacted format and standard format of xsave area. The XSAVE header of an xsave area comprises the 64 bytes starting at offset 512 from the area base address: - Bytes 7:0 of the xsave header is a state-component bitmap called xstate_bv. It identifies the state components in the xsave area. - Bytes 15:8 of the xsave header is a state-component bitmap called xcomp_bv. It is used as follows: - xcomp_bv[63] indicates the format of the extended region of the xsave area. If it is clear, the standard format is used. If it is set, the compacted format is used. - xcomp_bv[62:0] indicate which features (starting at feature 2) have space allocated for them in the compacted format. - Bytes 63:16 of the xsave header are reserved. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Link: http://lkml.kernel.org/r/1401387164-43416-6-git-send-email-fenghua.yu@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/include')
-rw-r--r--arch/x86/include/asm/processor.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index a4ea02351f4d..2c8d3b8e7fcb 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -386,8 +386,8 @@ struct bndcsr_struct {
struct xsave_hdr_struct {
u64 xstate_bv;
- u64 reserved1[2];
- u64 reserved2[5];
+ u64 xcomp_bv;
+ u64 reserved[6];
} __attribute__((packed));
struct xsave_struct {