Messages in this thread Patch in this message | | | From | "Fenghua Yu" <> | Subject | [PATCH 13/15] x86/xsaves: Call booting time xsaves and xrstors in setup_init_fpu_buf | Date | Mon, 26 May 2014 10:01:20 -0700 |
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From: Fenghua Yu <fenghua.yu@intel.com>
setup_init_fpu_buf() calls booting time xsaves and xrstors to save/restore xstate in xsave area.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> --- arch/x86/kernel/xsave.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c index a4b451c..8fa7c7d 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; -- 1.8.1.2
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