When XSAVES is used, xsave.header.xcomp_bv[63] must be set.
Signed-off-by: Yu-cheng Yu <[email protected]>
---
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
