Messages in this thread Patch in this message | | | From | Yu-cheng Yu <> | Subject | [PATCH v5 12/13] x86/xsaves: Fix fpstate_init() for XSAVES | Date | Mon, 9 May 2016 13:46:09 -0700 |
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When XSAVES is used, xsave.header.xcomp_bv[63] must be set.
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com> --- arch/x86/kernel/fpu/core.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index 41ab106..25e2605 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -224,6 +224,9 @@ void fpstate_init(union fpregs_state *state) memset(state, 0, kernel_xstate_size); + if (cpu_has_xsaves) + state->xsave.header.xcomp_bv = (u64)1 << 63; + if (cpu_has_fxsr) fpstate_init_fxstate(&state->fxsave); else -- 1.9.1
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