Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-17 01:22:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

KVM: SVM: Implement Flush-By-Asid feature

Browse Source 
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>
This commit is contained in:
Joerg Roedel 2010-12-03 15:25:16 +01:00 committed by Avi Kivity
parent f40f6a459c
commit 38e5e92fe8
2 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/include/asm/svm.h
View File

@ -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

10
arch/x86/kvm/svm.c
View File

@ -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();