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authorJoerg Roedel <joerg.roedel@amd.com>2010-12-03 15:25:16 +0100
committerAvi Kivity <avi@redhat.com>2011-01-12 11:30:45 +0200
commit38e5e92fe8c02a8766459d505423b855caf9af1f (patch)
tree29a51a874acbbaa4b2938539a4753797bcfe3fdb /arch/x86/kvm
parentf40f6a459c2fefa77fd74eec28d6233c0a7f431a (diff)
KVM: SVM: Implement Flush-By-Asid feature
This patch adds the new flush-by-asid of upcoming AMD processors to the KVM-AMD module. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
-rw-r--r--arch/x86/kvm/svm.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 7272b364580..4dbc37204de 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -3158,7 +3158,6 @@ static void pre_svm_run(struct vcpu_svm *svm)
struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
- svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
/* FIXME: handle wraparound of asid_generation */
if (svm->asid_generation != sd->asid_generation)
new_asid(svm, sd);
@@ -3303,7 +3302,12 @@ static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
static void svm_flush_tlb(struct kvm_vcpu *vcpu)
{
- to_svm(vcpu)->asid_generation--;
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ if (static_cpu_has(X86_FEATURE_FLUSHBYASID))
+ svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
+ else
+ svm->asid_generation--;
}
static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
@@ -3529,6 +3533,8 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
svm->next_rip = 0;
+ svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
+
/* if exit due to PF check for async PF */
if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
svm->apf_reason = kvm_read_and_reset_pf_reason();