diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2010-12-03 17:25:16 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-12 12:30:45 +0300 |
| commit | 38e5e92fe8c02a8766459d505423b855caf9af1f (patch) | |
| tree | 29a51a874acbbaa4b2938539a4753797bcfe3fdb /arch | |
| parent | f40f6a459c2fefa77fd74eec28d6233c0a7f431a (diff) | |
| download | linux-38e5e92fe8c02a8766459d505423b855caf9af1f.tar.xz | |
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')
| -rw-r--r-- | arch/x86/include/asm/svm.h | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/svm.c | 10 |
2 files changed, 10 insertions, 2 deletions
diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index 235dd732c336..82ecaa32fcf7 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -88,6 +88,8 @@ struct __attribute__ ((__packed__)) vmcb_control_area { #define TLB_CONTROL_DO_NOTHING 0 #define TLB_CONTROL_FLUSH_ALL_ASID 1 +#define TLB_CONTROL_FLUSH_ASID 3 +#define TLB_CONTROL_FLUSH_ASID_LOCAL 7 #define V_TPR_MASK 0x0f diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 7272b364580c..4dbc37204de1 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(); |