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| author | Fenghua Yu <fenghua.yu@intel.com> | 2014-05-29 11:12:42 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2014-05-29 14:33:06 -0700 |
| commit | 47c2f292cc8669f70644a949cadd5fa5ee0e0e07 (patch) | |
| tree | 6bbc5ede81eca14c21a445ae018dc874cb7fc97a /arch/x86/kernel/xsave.c | |
| parent | f41d830fa890044cb60f6bb39fc8f6493ffebb47 (diff) | |
| download | lwn-47c2f292cc8669f70644a949cadd5fa5ee0e0e07.tar.gz lwn-47c2f292cc8669f70644a949cadd5fa5ee0e0e07.zip | |
x86/xsaves: Call booting time xsaves and xrstors in setup_init_fpu_buf
setup_init_fpu_buf() calls booting time xsaves and xrstors to save and restore
xstate in xsave area.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1401387164-43416-15-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/xsave.c')
| -rw-r--r-- | arch/x86/kernel/xsave.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c index a4b451c6addf..8fa7c7d4183d 100644 --- a/arch/x86/kernel/xsave.c +++ b/arch/x86/kernel/xsave.c @@ -496,15 +496,21 @@ static void __init setup_init_fpu_buf(void) setup_xstate_features(); + if (cpu_has_xsaves) { + init_xstate_buf->xsave_hdr.xcomp_bv = + (u64)1 << 63 | pcntxt_mask; + init_xstate_buf->xsave_hdr.xstate_bv = pcntxt_mask; + } + /* * Init all the features state with header_bv being 0x0 */ - xrstor_state(init_xstate_buf, -1); + xrstor_state_booting(init_xstate_buf, -1); /* * Dump the init state again. This is to identify the init state * of any feature which is not represented by all zero's. */ - xsave_state(init_xstate_buf, -1); + xsave_state_booting(init_xstate_buf, -1); } static enum { AUTO, ENABLE, DISABLE } eagerfpu = AUTO; |