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Message-Id: <1242638585-18470-23-git-send-email-avi@redhat.com>
Date: Mon, 18 May 2009 12:22:44 +0300
From: Avi Kivity <avi@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: kvm@...r.kernel.org
Subject: [PATCH 22/43] KVM: consolidate ioapic/ipi interrupt delivery logic
From: Gleb Natapov <gleb@...hat.com>
Use kvm_apic_match_dest() in kvm_get_intr_delivery_bitmask() instead
of duplicating the same code. Use kvm_get_intr_delivery_bitmask() in
apic_send_ipi() to figure out ipi destination instead of reimplementing
the logic.
Signed-off-by: Gleb Natapov <gleb@...hat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@...hat.com>
---
arch/ia64/kvm/kvm-ia64.c | 8 +++++
arch/ia64/kvm/lapic.h | 3 ++
arch/x86/kvm/lapic.c | 69 ++++++++++++++++--------------------------
arch/x86/kvm/lapic.h | 2 +
include/linux/kvm_host.h | 5 ---
virt/kvm/ioapic.c | 5 ++-
virt/kvm/ioapic.h | 10 ++++--
virt/kvm/irq_comm.c | 76 +++++++++++++--------------------------------
8 files changed, 71 insertions(+), 107 deletions(-)
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 99d6d17..8eea9cb 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -1852,6 +1852,14 @@ struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector,
return lvcpu;
}
+int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
+ int short_hand, int dest, int dest_mode)
+{
+ return (dest_mode == 0) ?
+ kvm_apic_match_physical_addr(target, dest) :
+ kvm_apic_match_logical_addr(target, dest);
+}
+
static int find_highest_bits(int *dat)
{
u32 bits, bitnum;
diff --git a/arch/ia64/kvm/lapic.h b/arch/ia64/kvm/lapic.h
index cbcfaa6..31602e7 100644
--- a/arch/ia64/kvm/lapic.h
+++ b/arch/ia64/kvm/lapic.h
@@ -20,6 +20,9 @@ void kvm_free_lapic(struct kvm_vcpu *vcpu);
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_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
+ int short_hand, int dest, int dest_mode);
+bool kvm_apic_present(struct kvm_vcpu *vcpu);
int kvm_apic_set_irq(struct kvm_vcpu *vcpu, u8 vec, u8 dmode, u8 trig);
#endif
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index a42f968..998862a 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -260,7 +260,7 @@ static void apic_set_tpr(struct kvm_lapic *apic, u32 tpr)
int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
{
- return kvm_apic_id(apic) == dest;
+ return dest == 0xff || kvm_apic_id(apic) == dest;
}
int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
@@ -289,37 +289,34 @@ int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
return result;
}
-static int apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
+int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
int short_hand, int dest, int dest_mode)
{
int result = 0;
struct kvm_lapic *target = vcpu->arch.apic;
apic_debug("target %p, source %p, dest 0x%x, "
- "dest_mode 0x%x, short_hand 0x%x",
+ "dest_mode 0x%x, short_hand 0x%x\n",
target, source, dest, dest_mode, short_hand);
ASSERT(!target);
switch (short_hand) {
case APIC_DEST_NOSHORT:
- if (dest_mode == 0) {
+ if (dest_mode == 0)
/* Physical mode. */
- if ((dest == 0xFF) || (dest == kvm_apic_id(target)))
- result = 1;
- } else
+ result = kvm_apic_match_physical_addr(target, dest);
+ else
/* Logical mode. */
result = kvm_apic_match_logical_addr(target, dest);
break;
case APIC_DEST_SELF:
- if (target == source)
- result = 1;
+ result = (target == source);
break;
case APIC_DEST_ALLINC:
result = 1;
break;
case APIC_DEST_ALLBUT:
- if (target != source)
- result = 1;
+ result = (target != source);
break;
default:
printk(KERN_WARNING "Bad dest shorthand value %x\n",
@@ -492,38 +489,26 @@ static void apic_send_ipi(struct kvm_lapic *apic)
unsigned int delivery_mode = icr_low & APIC_MODE_MASK;
unsigned int vector = icr_low & APIC_VECTOR_MASK;
- struct kvm_vcpu *target;
- struct kvm_vcpu *vcpu;
- DECLARE_BITMAP(lpr_map, KVM_MAX_VCPUS);
+ DECLARE_BITMAP(deliver_bitmask, KVM_MAX_VCPUS);
int i;
- bitmap_zero(lpr_map, KVM_MAX_VCPUS);
apic_debug("icr_high 0x%x, icr_low 0x%x, "
"short_hand 0x%x, dest 0x%x, trig_mode 0x%x, level 0x%x, "
"dest_mode 0x%x, delivery_mode 0x%x, vector 0x%x\n",
icr_high, icr_low, short_hand, dest,
trig_mode, level, dest_mode, delivery_mode, vector);
- for (i = 0; i < KVM_MAX_VCPUS; i++) {
- vcpu = apic->vcpu->kvm->vcpus[i];
- if (!vcpu)
- continue;
-
- if (vcpu->arch.apic &&
- apic_match_dest(vcpu, apic, short_hand, dest, dest_mode)) {
- if (delivery_mode == APIC_DM_LOWEST)
- __set_bit(vcpu->vcpu_id, lpr_map);
- else
- __apic_accept_irq(vcpu->arch.apic, delivery_mode,
- vector, level, trig_mode);
- }
- }
-
- if (delivery_mode == APIC_DM_LOWEST) {
- target = kvm_get_lowest_prio_vcpu(vcpu->kvm, vector, lpr_map);
- if (target != NULL)
- __apic_accept_irq(target->arch.apic, delivery_mode,
- vector, level, trig_mode);
+ kvm_get_intr_delivery_bitmask(apic->vcpu->kvm, apic, dest, dest_mode,
+ delivery_mode == APIC_DM_LOWEST, short_hand,
+ deliver_bitmask);
+
+ while ((i = find_first_bit(deliver_bitmask, KVM_MAX_VCPUS))
+ < KVM_MAX_VCPUS) {
+ struct kvm_vcpu *vcpu = apic->vcpu->kvm->vcpus[i];
+ __clear_bit(i, deliver_bitmask);
+ if (vcpu)
+ __apic_accept_irq(vcpu->arch.apic, delivery_mode,
+ vector, level, trig_mode);
}
}
@@ -930,16 +915,14 @@ void kvm_lapic_reset(struct kvm_vcpu *vcpu)
}
EXPORT_SYMBOL_GPL(kvm_lapic_reset);
-int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
+bool kvm_apic_present(struct kvm_vcpu *vcpu)
{
- struct kvm_lapic *apic = vcpu->arch.apic;
- int ret = 0;
-
- if (!apic)
- return 0;
- ret = apic_enabled(apic);
+ return vcpu->arch.apic && apic_hw_enabled(vcpu->arch.apic);
+}
- return ret;
+int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
+{
+ return kvm_apic_present(vcpu) && apic_sw_enabled(vcpu->arch.apic);
}
EXPORT_SYMBOL_GPL(kvm_lapic_enabled);
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index 1b0e3c0..b66dc14 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -37,6 +37,8 @@ u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);
void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data);
void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu);
int kvm_lapic_enabled(struct kvm_vcpu *vcpu);
+bool kvm_apic_present(struct kvm_vcpu *vcpu);
+bool kvm_lapic_present(struct kvm_vcpu *vcpu);
int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu);
void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr);
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index ec9d078..fb60f31 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -363,11 +363,6 @@ void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
struct kvm_irq_mask_notifier *kimn);
void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
-#ifdef __KVM_HAVE_IOAPIC
-void kvm_get_intr_delivery_bitmask(struct kvm *kvm,
- union kvm_ioapic_redirect_entry *entry,
- unsigned long *deliver_bitmask);
-#endif
int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
void kvm_register_irq_ack_notifier(struct kvm *kvm,
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index b71c044..43969bb 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -147,7 +147,10 @@ int ioapic_deliver_entry(struct kvm *kvm, union kvm_ioapic_redirect_entry *e)
DECLARE_BITMAP(deliver_bitmask, KVM_MAX_VCPUS);
int i, r = -1;
- kvm_get_intr_delivery_bitmask(kvm, e, deliver_bitmask);
+ kvm_get_intr_delivery_bitmask(kvm, NULL, e->fields.dest_id,
+ e->fields.dest_mode,
+ e->fields.delivery_mode == IOAPIC_LOWEST_PRIORITY,
+ 0, deliver_bitmask);
if (find_first_bit(deliver_bitmask, KVM_MAX_VCPUS) >= KVM_MAX_VCPUS) {
ioapic_debug("no target on destination\n");
diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h
index bedeea5..d996c7a 100644
--- a/virt/kvm/ioapic.h
+++ b/virt/kvm/ioapic.h
@@ -65,13 +65,15 @@ static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
}
struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector,
- unsigned long *bitmap);
+ unsigned long *bitmap);
+int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
+ int short_hand, int dest, int dest_mode);
void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode);
int kvm_ioapic_init(struct kvm *kvm);
int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level);
void kvm_ioapic_reset(struct kvm_ioapic *ioapic);
-void kvm_get_intr_delivery_bitmask(struct kvm *kvm,
- union kvm_ioapic_redirect_entry *entry,
- unsigned long *deliver_bitmask);
+void kvm_get_intr_delivery_bitmask(struct kvm *kvm, struct kvm_lapic *src,
+ int dest_id, int dest_mode, bool low_prio, int short_hand,
+ unsigned long *deliver_bitmask);
int ioapic_deliver_entry(struct kvm *kvm, union kvm_ioapic_redirect_entry *e);
#endif
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index 35397a5..e43701c 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -43,67 +43,35 @@ static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
return kvm_ioapic_set_irq(kvm->arch.vioapic, e->irqchip.pin, level);
}
-void kvm_get_intr_delivery_bitmask(struct kvm *kvm,
- union kvm_ioapic_redirect_entry *entry,
- unsigned long *deliver_bitmask)
+void kvm_get_intr_delivery_bitmask(struct kvm *kvm, struct kvm_lapic *src,
+ int dest_id, int dest_mode, bool low_prio, int short_hand,
+ unsigned long *deliver_bitmask)
{
int i;
struct kvm_vcpu *vcpu;
+ if (dest_mode == 0 && dest_id == 0xff && low_prio)
+ printk(KERN_INFO "kvm: apic: phys broadcast and lowest prio\n");
+
bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
+ for (i = 0; i < KVM_MAX_VCPUS; i++) {
+ vcpu = kvm->vcpus[i];
- if (entry->fields.dest_mode == 0) { /* Physical mode. */
- if (entry->fields.dest_id == 0xFF) { /* Broadcast. */
- for (i = 0; i < KVM_MAX_VCPUS; ++i)
- if (kvm->vcpus[i] && kvm->vcpus[i]->arch.apic)
- __set_bit(i, deliver_bitmask);
- /* Lowest priority shouldn't combine with broadcast */
- if (entry->fields.delivery_mode ==
- IOAPIC_LOWEST_PRIORITY && printk_ratelimit())
- printk(KERN_INFO "kvm: apic: phys broadcast "
- "and lowest prio\n");
- return;
- }
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- vcpu = kvm->vcpus[i];
- if (!vcpu)
- continue;
- if (kvm_apic_match_physical_addr(vcpu->arch.apic,
- entry->fields.dest_id)) {
- if (vcpu->arch.apic)
- __set_bit(i, deliver_bitmask);
- break;
- }
- }
- } else if (entry->fields.dest_id != 0) /* Logical mode, MDA non-zero. */
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- vcpu = kvm->vcpus[i];
- if (!vcpu)
- continue;
- if (vcpu->arch.apic &&
- kvm_apic_match_logical_addr(vcpu->arch.apic,
- entry->fields.dest_id))
- __set_bit(i, deliver_bitmask);
- }
+ if (!vcpu || !kvm_apic_present(vcpu))
+ continue;
- switch (entry->fields.delivery_mode) {
- case IOAPIC_LOWEST_PRIORITY:
- /* Select one in deliver_bitmask */
- vcpu = kvm_get_lowest_prio_vcpu(kvm,
- entry->fields.vector, deliver_bitmask);
- bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
- if (!vcpu)
- return;
- __set_bit(vcpu->vcpu_id, deliver_bitmask);
- break;
- case IOAPIC_FIXED:
- case IOAPIC_NMI:
- break;
- default:
- if (printk_ratelimit())
- printk(KERN_INFO "kvm: unsupported delivery mode %d\n",
- entry->fields.delivery_mode);
+ if (!kvm_apic_match_dest(vcpu, src, short_hand, dest_id,
+ dest_mode))
+ continue;
+
+ __set_bit(i, deliver_bitmask);
+ }
+
+ if (low_prio) {
+ vcpu = kvm_get_lowest_prio_vcpu(kvm, 0, deliver_bitmask);
bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
+ if (vcpu)
+ __set_bit(vcpu->vcpu_id, deliver_bitmask);
}
}
--
1.6.0.6
--
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