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. 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
