Fix guest xsave area allocation size from fpu_user_cfg.default_size to
fpu_kernel_cfg.default_size so that the xsave area size is consistent
with fpstate->size set in __fpstate_reset().
With the fix, guest fpstate size is sufficient for KVM supported guest
xfeatures.
Fixes: 69f6ed1d14c6 ("x86/fpu: Provide infrastructure for KVM FPU cleanup");
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Yang Weijiang <weijiang.yang@xxxxxxxxx>
---
arch/x86/kernel/fpu/core.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index a86d37052a64..a42d8ad26ce6 100644
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -220,7 +220,9 @@ bool fpu_alloc_guest_fpstate(struct fpu_guest *gfpu)
struct fpstate *fpstate;
unsigned int size;
- size = fpu_user_cfg.default_size + ALIGN(offsetof(struct fpstate, regs), 64);
+ size = fpu_kernel_cfg.default_size +
+ ALIGN(offsetof(struct fpstate, regs), 64);
+
fpstate = vzalloc(size);
if (!fpstate)
return false;
--
2.27.0
