From dc1e35c6e95e8923cf1d3510438b63c600fee1e2 Mon Sep 17 00:00:00 2001 From: Suresh Siddha Date: Tue, 29 Jul 2008 10:29:19 -0700 Subject: 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 Signed-off-by: H. Peter Anvin Signed-off-by: Ingo Molnar --- include/asm-x86/processor-flags.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/asm-x86/processor-flags.h') diff --git a/include/asm-x86/processor-flags.h b/include/asm-x86/processor-flags.h index 5dd79774f69..dc5f0712f9f 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 -- cgit v1.2.3-70-g09d2