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authorSuravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>2016-05-04 14:09:49 -0500
committerPaolo Bonzini <pbonzini@redhat.com>2016-05-18 18:04:30 +0200
commitbe8ca170edf342cc45ae4a6431ef192e5cbe211e (patch)
tree1bf04e60221c1d247b02514a1bcc7710bf5f3d77 /arch
parent18f40c53e10f8d1267dc47cce4487664eececd6d (diff)
downloadlinux-be8ca170edf342cc45ae4a6431ef192e5cbe211e.tar.bz2
KVM: x86: Introducing kvm_x86_ops.apicv_post_state_restore
Adding kvm_x86_ops hooks to allow APICv to do post state restore. This is required to support VM save and restore feature. Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/kvm_host.h1
-rw-r--r--arch/x86/kvm/lapic.c2
-rw-r--r--arch/x86/kvm/svm.c10
3 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 7aaa10891e2c..43e74384c606 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1004,6 +1004,7 @@ struct kvm_x86_ops {
int (*update_pi_irte)(struct kvm *kvm, unsigned int host_irq,
uint32_t guest_irq, bool set);
+ void (*apicv_post_state_restore)(struct kvm_vcpu *vcpu);
};
struct kvm_arch_async_pf {
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 34c28c0ffe6a..539675c6daa2 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1961,6 +1961,8 @@ void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu,
1 : count_vectors(apic->regs + APIC_ISR);
apic->highest_isr_cache = -1;
if (vcpu->arch.apicv_active) {
+ if (kvm_x86_ops->apicv_post_state_restore)
+ kvm_x86_ops->apicv_post_state_restore(vcpu);
kvm_x86_ops->hwapic_irr_update(vcpu,
apic_find_highest_irr(apic));
kvm_x86_ops->hwapic_isr_update(vcpu->kvm,
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index db2c140ed079..8c85b8ee68b6 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -4834,6 +4834,15 @@ static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
}
+static inline void avic_post_state_restore(struct kvm_vcpu *vcpu)
+{
+ if (avic_handle_apic_id_update(vcpu) != 0)
+ return;
+ if (avic_handle_dfr_update(vcpu) != 0)
+ return;
+ avic_handle_ldr_update(vcpu);
+}
+
static struct kvm_x86_ops svm_x86_ops = {
.cpu_has_kvm_support = has_svm,
.disabled_by_bios = is_disabled,
@@ -4914,6 +4923,7 @@ static struct kvm_x86_ops svm_x86_ops = {
.sync_pir_to_irr = svm_sync_pir_to_irr,
.hwapic_irr_update = svm_hwapic_irr_update,
.hwapic_isr_update = svm_hwapic_isr_update,
+ .apicv_post_state_restore = avic_post_state_restore,
.set_tss_addr = svm_set_tss_addr,
.get_tdp_level = get_npt_level,