Commit 6b390b63 authored Jan 29, 2008 by Joerg Roedel Committed by Avi Kivity Mar 03, 2008

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 <joerg.roedel@amd.com>
Signed-off-by: Markus Rechberger <markus.rechberger@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

parent 334df50a

arch/x86/kvm/svm.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}

Admin message