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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>
hifive-unleashed-5.1
Fenghua Yu 2014-05-29 11:12:42 -07:00 committed by H. Peter Anvin
parent f41d830fa8
commit 47c2f292cc
1 changed files with 8 additions and 2 deletions
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10
arch/x86/kernel/xsave.c
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@ -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;