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

x86: add linux kernel support for YMM state

Browse Source 
Impact: save/restore Intel-AVX state properly between tasks

Intel Advanced Vector Extensions (AVX) introduce 256-bit vector processing
capability. More about AVX at http://software.intel.com/sites/avx

Add OS support for YMM state management using xsave/xrstor infrastructure
to support AVX.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <1239402084.27006.8057.camel@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Suresh Siddha
2009-04-10 15:21:24 -07:00
committed by Ingo Molnar
parent 1ee4bd92a7
commit a30469e792
4 changed files with 15 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/x86/include/asm/sigcontext.h
View File

@@ -269,6 +269,11 @@ struct _xsave_hdr {
__u64 reserved2[5];
};
struct _ymmh_state {
/* 16 * 16 bytes for each YMMH-reg */
__u32 ymmh_space[64];
};
/*
* Extended state pointed by the fpstate pointer in the sigcontext.
* In addition to the fpstate, information encoded in the xstate_hdr
@@ -278,6 +283,7 @@ struct _xsave_hdr {
struct _xstate {
struct _fpstate fpstate;
struct _xsave_hdr xstate_hdr;
struct _ymmh_state ymmh;
/* new processor state extensions go here */
};