diff options
| author | Eddie Dong <eddie.dong@intel.com> | 2007-07-22 10:36:31 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-10-13 10:18:25 +0200 |
| commit | 9cf98828d12285d1fb43e774c8c100a55f8f34e1 (patch) | |
| tree | 0b9d1f8b2af7423c34ebf7e3df4c5c27a3aabf64 /drivers/kvm/kvm_main.c | |
| parent | b6958ce44a11a9e9425d2b67a653b1ca2a27796f (diff) | |
| download | lwn-9cf98828d12285d1fb43e774c8c100a55f8f34e1.tar.gz lwn-9cf98828d12285d1fb43e774c8c100a55f8f34e1.zip | |
KVM: Protect in-kernel pio using kvm->lock
pio operation and IRQ_LINE kvm_vm_ioctl is not kvm->lock
protected. Add lock to same with IOAPIC MMIO operations.
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/kvm_main.c')
| -rw-r--r-- | drivers/kvm/kvm_main.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 4384364fc0c8..5063b3addbbf 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -1790,6 +1790,7 @@ static void kernel_pio(struct kvm_io_device *pio_dev, { /* TODO: String I/O for in kernel device */ + mutex_lock(&vcpu->kvm->lock); if (vcpu->pio.in) kvm_iodevice_read(pio_dev, vcpu->pio.port, vcpu->pio.size, @@ -1798,6 +1799,7 @@ static void kernel_pio(struct kvm_io_device *pio_dev, kvm_iodevice_write(pio_dev, vcpu->pio.port, vcpu->pio.size, pd); + mutex_unlock(&vcpu->kvm->lock); } static void pio_string_write(struct kvm_io_device *pio_dev, @@ -1807,12 +1809,14 @@ static void pio_string_write(struct kvm_io_device *pio_dev, void *pd = vcpu->pio_data; int i; + mutex_lock(&vcpu->kvm->lock); for (i = 0; i < io->cur_count; i++) { kvm_iodevice_write(pio_dev, io->port, io->size, pd); pd += io->size; } + mutex_unlock(&vcpu->kvm->lock); } int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in, @@ -2818,6 +2822,7 @@ static long kvm_vm_ioctl(struct file *filp, if (copy_from_user(&irq_event, argp, sizeof irq_event)) goto out; if (irqchip_in_kernel(kvm)) { + mutex_lock(&kvm->lock); if (irq_event.irq < 16) kvm_pic_set_irq(pic_irqchip(kvm), irq_event.irq, @@ -2825,6 +2830,7 @@ static long kvm_vm_ioctl(struct file *filp, kvm_ioapic_set_irq(kvm->vioapic, irq_event.irq, irq_event.level); + mutex_unlock(&kvm->lock); r = 0; } break; |