diff options
| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2008-07-29 19:29:19 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-30 19:49:24 +0200 |
| commit | dc1e35c6e95e8923cf1d3510438b63c600fee1e2 (patch) | |
| tree | 4348f51f1bfdd124efd6d16dcc552bd4a148fdfb /include/asm-x86/xsave.h | |
| parent | x86, xsave: xsave cpuid feature bits (diff) | |
| download | linux-dc1e35c6e95e8923cf1d3510438b63c600fee1e2.tar.xz 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/xsave.h')
| -rw-r--r-- | include/asm-x86/xsave.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/asm-x86/xsave.h b/include/asm-x86/xsave.h new file mode 100644 index 000000000000..6d70e62c6bdc --- /dev/null +++ b/include/asm-x86/xsave.h @@ -0,0 +1,26 @@ +#ifndef __ASM_X86_XSAVE_H +#define __ASM_X86_XSAVE_H + +#include <asm/processor.h> +#include <asm/i387.h> + +#define XSTATE_FP 0x1 +#define XSTATE_SSE 0x2 + +#define XSTATE_FPSSE (XSTATE_FP | XSTATE_SSE) + +#define FXSAVE_SIZE 512 + +/* + * These are the features that the OS can handle currently. + */ +#define XCNTXT_LMASK (XSTATE_FP | XSTATE_SSE) +#define XCNTXT_HMASK 0x0 + +extern unsigned int xstate_size, pcntxt_hmask, pcntxt_lmask; +extern struct xsave_struct *init_xstate_buf; + +extern void xsave_cntxt_init(void); +extern void xsave_init(void); + +#endif |