From: Wanpeng Li <wanpeng.li@xxxxxxxxxxx> SDM section 2.6 mentioned: After reset, all bits (except bit 0) in XCR0 are cleared to zero; XCR0[0] is set to 1. This patch sets XCRO to the 0x1 after vCPU reset. Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx> Signed-off-by: Wanpeng Li <wanpeng.li@xxxxxxxxxxx> --- arch/x86/kvm/x86.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index b0d2915..c784cd6 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -7816,6 +7816,8 @@ void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) vcpu->arch.regs_avail = ~0; vcpu->arch.regs_dirty = ~0; + vcpu->arch.xcr0 = XFEATURE_MASK_FP; + kvm_x86_ops->vcpu_reset(vcpu, init_event); } -- 2.7.4
