Commit 6b390b63 authored by Joerg Roedel's avatar Joerg Roedel Committed by Avi Kivity

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: default avatarJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: default avatarMarkus Rechberger <markus.rechberger@amd.com>
Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent 334df50a
...@@ -792,8 +792,10 @@ static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) ...@@ -792,8 +792,10 @@ static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
vcpu->arch.cr0 = cr0; vcpu->arch.cr0 = cr0;
cr0 |= X86_CR0_PG | X86_CR0_WP; cr0 |= X86_CR0_PG | X86_CR0_WP;
cr0 &= ~(X86_CR0_CD | X86_CR0_NW); 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; cr0 |= X86_CR0_TS;
}
svm->vmcb->save.cr0 = cr0; svm->vmcb->save.cr0 = cr0;
} }
......
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