lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

x86, xsave: enable xsave/xrstor on cpus with xsave support

Browse Source 
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>
This commit is contained in:
Suresh Siddha
2008-07-29 10:29:19 -07:00
committed by Ingo Molnar
parent a648bf4632
commit dc1e35c6e9
10 changed files with 148 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
include/asm-x86/processor.h
View File

@ -346,6 +346,18 @@ struct i387_soft_struct {
u32 entry_eip;
};
struct xsave_hdr_struct {
u64 xstate_bv;
u64 reserved1[2];
u64 reserved2[5];
} __attribute__((packed));
struct xsave_struct {
struct i387_fxsave_struct i387;
struct xsave_hdr_struct xsave_hdr;
/* new processor state extensions will go here */
} __attribute__ ((packed, aligned (64)));
union thread_xstate {
struct i387_fsave_struct fsave;
struct i387_fxsave_struct fxsave;