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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2009-06-04 15:08:23 -0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-09-10 08:32:49 +0300 |
| commit | 60eead79ad8750f80384cbe48fc44edcc78a0305 (patch) | |
| tree | bf7b2a6e83c47f709e9d0afb2a8c53eb2944b05c | |
| parent | 64a2268dcfc9c3626aa7f70902690e2fc10c1630 (diff) | |
| download | linux-60eead79ad8750f80384cbe48fc44edcc78a0305.tar.bz2 | |
KVM: introduce irq_lock, use it to protect ioapic
Introduce irq_lock, and use to protect ioapic data structures.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | include/linux/kvm_host.h | 3 | ||||
| -rw-r--r-- | virt/kvm/ioapic.c | 5 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 1 |
3 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 19240feefe6f..0c71688b1ee3 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -124,7 +124,6 @@ struct kvm_kernel_irq_routing_entry { }; struct kvm { - struct mutex lock; /* protects the vcpus array and APIC accesses */ spinlock_t mmu_lock; spinlock_t requests_lock; struct rw_semaphore slots_lock; @@ -134,6 +133,7 @@ struct kvm { KVM_PRIVATE_MEM_SLOTS]; struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; struct list_head vm_list; + struct mutex lock; struct kvm_io_bus mmio_bus; struct kvm_io_bus pio_bus; #ifdef CONFIG_HAVE_KVM_EVENTFD @@ -150,6 +150,7 @@ struct kvm { struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; #endif + struct mutex irq_lock; #ifdef CONFIG_HAVE_KVM_IRQCHIP struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */ struct hlist_head mask_notifier_list; diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c index 469b9faae665..2a5667173995 100644 --- a/virt/kvm/ioapic.c +++ b/virt/kvm/ioapic.c @@ -243,6 +243,7 @@ static void ioapic_mmio_read(struct kvm_io_device *this, gpa_t addr, int len, ioapic_debug("addr %lx\n", (unsigned long)addr); ASSERT(!(addr & 0xf)); /* check alignment */ + mutex_lock(&ioapic->kvm->irq_lock); addr &= 0xff; switch (addr) { case IOAPIC_REG_SELECT: @@ -269,6 +270,7 @@ static void ioapic_mmio_read(struct kvm_io_device *this, gpa_t addr, int len, default: printk(KERN_WARNING "ioapic: wrong length %d\n", len); } + mutex_unlock(&ioapic->kvm->irq_lock); } static void ioapic_mmio_write(struct kvm_io_device *this, gpa_t addr, int len, @@ -280,6 +282,8 @@ static void ioapic_mmio_write(struct kvm_io_device *this, gpa_t addr, int len, ioapic_debug("ioapic_mmio_write addr=%p len=%d val=%p\n", (void*)addr, len, val); ASSERT(!(addr & 0xf)); /* check alignment */ + + mutex_lock(&ioapic->kvm->irq_lock); if (len == 4 || len == 8) data = *(u32 *) val; else { @@ -305,6 +309,7 @@ static void ioapic_mmio_write(struct kvm_io_device *this, gpa_t addr, int len, default: break; } + mutex_unlock(&ioapic->kvm->irq_lock); } void kvm_ioapic_reset(struct kvm_ioapic *ioapic) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index d1f9c87daa87..d47e660fb709 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -982,6 +982,7 @@ static struct kvm *kvm_create_vm(void) kvm_io_bus_init(&kvm->pio_bus); kvm_irqfd_init(kvm); mutex_init(&kvm->lock); + mutex_init(&kvm->irq_lock); kvm_io_bus_init(&kvm->mmio_bus); init_rwsem(&kvm->slots_lock); atomic_set(&kvm->users_count, 1); |