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authorJoerg Roedel <joerg.roedel@amd.com>2008-01-29 13:01:27 +0100
committerAvi Kivity <avi@qumranet.com>2008-03-03 11:20:21 +0200
commit6b390b6392309b98fd116b57c2926c44975cde26 (patch)
tree3e9e8030bad6c3ef263edbe94b23469333238123 /arch/x86/kvm/svm.c
parent334df50a866ff7e234c9566960997ca5b9d0a382 (diff)
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>
Diffstat (limited to 'arch/x86/kvm/svm.c')
-rw-r--r--arch/x86/kvm/svm.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 511628916c4b..d71daabbb51b 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;
}