From 6b390b6392309b98fd116b57c2926c44975cde26 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Tue, 29 Jan 2008 13:01:27 +0100 Subject: [PATCH] KVM: SVM: set NM intercept when enabling CR0.TS in the guest Explicitly enable the NM intercept in svm_set_cr0 if we enable TS in the guest copy of CR0 for lazy FPU switching. This fixes guest SMP with Linux under SVM. Without that patch Linux deadlocks or panics right after trying to boot the other CPUs. Signed-off-by: Joerg Roedel Signed-off-by: Markus Rechberger Signed-off-by: Avi Kivity --- arch/x86/kvm/svm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 5116289..d71daab 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -792,8 +792,10 @@ static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) vcpu->arch.cr0 = cr0; cr0 |= X86_CR0_PG | X86_CR0_WP; cr0 &= ~(X86_CR0_CD | X86_CR0_NW); - if (!vcpu->fpu_active) + if (!vcpu->fpu_active) { + svm->vmcb->control.intercept_exceptions |= (1 << NM_VECTOR); cr0 |= X86_CR0_TS; + } svm->vmcb->save.cr0 = cr0; } -- 2.7.4