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| author | Suresh Siddha | 2008-07-29 19:29:19 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2008-07-30 19:49:24 +0200 |
| commit | dc1e35c6e95e8923cf1d3510438b63c600fee1e2 (patch) | |
| tree | 4348f51f1bfdd124efd6d16dcc552bd4a148fdfb /include/asm-x86/processor-flags.h | |
| parent | x86, xsave: xsave cpuid feature bits (diff) | |
| download | kernel-qcow2-linux-dc1e35c6e95e8923cf1d3510438b63c600fee1e2.tar.gz kernel-qcow2-linux-dc1e35c6e95e8923cf1d3510438b63c600fee1e2.tar.xz kernel-qcow2-linux-dc1e35c6e95e8923cf1d3510438b63c600fee1e2.zip | |
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 @@ #define X86_CR4_OSFXSR 0x00000200 /* enable fast FPU save and restore */ #define X86_CR4_OSXMMEXCPT 0x00000400 /* enable unmasked SSE exceptions */ #define X86_CR4_VMXE 0x00002000 /* enable VMX virtualization */ +#define X86_CR4_OSXSAVE 0x00040000 /* enable xsave and xrestore */ /* * x86-64 Task Priority Register, CR8 |