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authorYang Zhang <yang.z.zhang@Intel.com>2013-04-11 19:25:14 +0800
committerMarcelo Tosatti <mtosatti@redhat.com>2013-04-16 16:32:40 -0300
commitcf9e65b773394c5ad8fa7455c43268bc8ec2109f (patch)
treedea4e116da3ecc13c8b6383ec2145a73480d66f0
parent3d81bc7e96d6bca0b8f8b7d1bf6ea72caa3aac57 (diff)
downloadlinux-cf9e65b773394c5ad8fa7455c43268bc8ec2109f.tar.gz
KVM: Set TMR when programming ioapic entry
We already know the trigger mode of a given interrupt when programming the ioapice entry. So it's not necessary to set it in each interrupt delivery. Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com> Reviewed-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
-rw-r--r--arch/x86/kvm/lapic.c15
-rw-r--r--arch/x86/kvm/lapic.h1
-rw-r--r--arch/x86/kvm/x86.c5
-rw-r--r--virt/kvm/ioapic.c12
-rw-r--r--virt/kvm/ioapic.h3
5 files changed, 25 insertions, 11 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 34a8ca84528..d197579435d 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -468,6 +468,15 @@ static inline int apic_find_highest_isr(struct kvm_lapic *apic)
return result;
}
+void kvm_apic_update_tmr(struct kvm_vcpu *vcpu, u32 *tmr)
+{
+ struct kvm_lapic *apic = vcpu->arch.apic;
+ int i;
+
+ for (i = 0; i < 8; i++)
+ apic_set_reg(apic, APIC_TMR + 0x10 * i, tmr[i]);
+}
+
static void apic_update_ppr(struct kvm_lapic *apic)
{
u32 tpr, isrv, ppr, old_ppr;
@@ -661,12 +670,6 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
if (dest_map)
__set_bit(vcpu->vcpu_id, dest_map);
- if (trig_mode) {
- apic_debug("level trig mode for vector %d", vector);
- apic_set_vector(vector, apic->regs + APIC_TMR);
- } else
- apic_clear_vector(vector, apic->regs + APIC_TMR);
-
result = !apic_test_and_set_irr(vector, apic);
trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode,
trig_mode, vector, !result);
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index 16304b1a8cb..7fe0c9180ea 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -53,6 +53,7 @@ void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);
u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu);
void kvm_apic_set_version(struct kvm_vcpu *vcpu);
+void kvm_apic_update_tmr(struct kvm_vcpu *vcpu, u32 *tmr);
int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest);
int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda);
int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 87a05df3eae..276b4a9a560 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5664,14 +5664,17 @@ static void kvm_gen_update_masterclock(struct kvm *kvm)
static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu)
{
u64 eoi_exit_bitmap[4];
+ u32 tmr[8];
if (!kvm_apic_hw_enabled(vcpu->arch.apic))
return;
memset(eoi_exit_bitmap, 0, 32);
+ memset(tmr, 0, 32);
- kvm_ioapic_scan_entry(vcpu, eoi_exit_bitmap);
+ kvm_ioapic_scan_entry(vcpu, eoi_exit_bitmap, tmr);
kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap);
+ kvm_apic_update_tmr(vcpu, tmr);
}
static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index f2157a985a1..2d682977ce8 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -193,7 +193,8 @@ static void update_handled_vectors(struct kvm_ioapic *ioapic)
smp_wmb();
}
-void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
+void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap,
+ u32 *tmr)
{
struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;
union kvm_ioapic_redirect_entry *e;
@@ -207,8 +208,13 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
kvm_irq_has_notifier(ioapic->kvm, KVM_IRQCHIP_IOAPIC,
index) || index == RTC_GSI)) {
if (kvm_apic_match_dest(vcpu, NULL, 0,
- e->fields.dest_id, e->fields.dest_mode))
- __set_bit(e->fields.vector, (unsigned long *)eoi_exit_bitmap);
+ e->fields.dest_id, e->fields.dest_mode)) {
+ __set_bit(e->fields.vector,
+ (unsigned long *)eoi_exit_bitmap);
+ if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG)
+ __set_bit(e->fields.vector,
+ (unsigned long *)tmr);
+ }
}
}
spin_unlock(&ioapic->lock);
diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h
index 674a388612b..615d8c995c3 100644
--- a/virt/kvm/ioapic.h
+++ b/virt/kvm/ioapic.h
@@ -97,6 +97,7 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
void kvm_vcpu_request_scan_ioapic(struct kvm *kvm);
-void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap);
+void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap,
+ u32 *tmr);
#endif