diff options
| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2008-07-29 10:29:19 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-30 19:49:24 +0200 |
| commit | dc1e35c6e95e8923cf1d3510438b63c600fee1e2 (patch) | |
| tree | 4348f51f1bfdd124efd6d16dcc552bd4a148fdfb /arch/x86/kernel/cpu/common.c | |
| 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 'arch/x86/kernel/cpu/common.c')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 80ab20d4fa3..fabbcb7020f 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -712,6 +712,14 @@ void __cpuinit cpu_init(void) current_thread_info()->status = 0; clear_used_math(); mxcsr_feature_mask_init(); + + /* + * Boot processor to setup the FP and extended state context info. + */ + if (!smp_processor_id()) + init_thread_xstate(); + + xsave_init(); } #ifdef CONFIG_HOTPLUG_CPU |