diff options
| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2008-07-29 13:29:19 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-30 13:49:24 -0400 |
| commit | dc1e35c6e95e8923cf1d3510438b63c600fee1e2 (patch) | |
| tree | 4348f51f1bfdd124efd6d16dcc552bd4a148fdfb /include/asm-x86/processor-flags.h | |
| parent | a648bf4632628c787abb0514277f2a231fca39ca (diff) | |
x86, xsave: enable xsave/xrstor on cpus with xsave support
Enables xsave/xrstor by turning on cr4.osxsave on cpu's which have
the xsave support. For now, features that OS supports/enabled are
FP and SSE.
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-flags.h')
| -rw-r--r-- | include/asm-x86/processor-flags.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-x86/processor-flags.h b/include/asm-x86/processor-flags.h index 5dd79774f693..dc5f0712f9fa 100644 --- a/include/asm-x86/processor-flags.h +++ b/include/asm-x86/processor-flags.h | |||
| @@ -59,6 +59,7 @@ | |||
| 59 | #define X86_CR4_OSFXSR 0x00000200 /* enable fast FPU save and restore */ | 59 | #define X86_CR4_OSFXSR 0x00000200 /* enable fast FPU save and restore */ |
| 60 | #define X86_CR4_OSXMMEXCPT 0x00000400 /* enable unmasked SSE exceptions */ | 60 | #define X86_CR4_OSXMMEXCPT 0x00000400 /* enable unmasked SSE exceptions */ |
| 61 | #define X86_CR4_VMXE 0x00002000 /* enable VMX virtualization */ | 61 | #define X86_CR4_VMXE 0x00002000 /* enable VMX virtualization */ |
| 62 | #define X86_CR4_OSXSAVE 0x00040000 /* enable xsave and xrestore */ | ||
| 62 | 63 | ||
| 63 | /* | 64 | /* |
| 64 | * x86-64 Task Priority Register, CR8 | 65 | * x86-64 Task Priority Register, CR8 |