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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2009-06-23 20:05:14 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-09-10 07:33:02 +0200 |
| commit | 894a9c5543abf6f88d36dc1b9f5d90f35db09cb3 (patch) | |
| tree | 3fff94c380904dfef66ec7182c4dae59d7c85763 | |
| parent | KVM: Prepare memslot data structures for multiple hugepage sizes (diff) | |
| download | linux-894a9c5543abf6f88d36dc1b9f5d90f35db09cb3.tar.xz linux-894a9c5543abf6f88d36dc1b9f5d90f35db09cb3.zip | |
KVM: x86: missing locking in PIT/IRQCHIP/SET_BSP_CPU ioctl paths
Correct missing locking in a few places in x86's vm_ioctl handling path.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/i8254.c | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 12 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 2 |
3 files changed, 14 insertions, 2 deletions
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c index 15fc95b2fc05..bcd00c76d69e 100644 --- a/arch/x86/kvm/i8254.c +++ b/arch/x86/kvm/i8254.c @@ -345,9 +345,7 @@ static void pit_load_count(struct kvm *kvm, int channel, u32 val) void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val) { - mutex_lock(&kvm->arch.vpit->pit_state.lock); pit_load_count(kvm, channel, val); - mutex_unlock(&kvm->arch.vpit->pit_state.lock); } static inline struct kvm_pit *dev_to_pit(struct kvm_io_device *dev) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 57e76b37242f..e9b0982d2589 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1987,19 +1987,25 @@ static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) r = 0; switch (chip->chip_id) { case KVM_IRQCHIP_PIC_MASTER: + spin_lock(&pic_irqchip(kvm)->lock); memcpy(&pic_irqchip(kvm)->pics[0], &chip->chip.pic, sizeof(struct kvm_pic_state)); + spin_unlock(&pic_irqchip(kvm)->lock); break; case KVM_IRQCHIP_PIC_SLAVE: + spin_lock(&pic_irqchip(kvm)->lock); memcpy(&pic_irqchip(kvm)->pics[1], &chip->chip.pic, sizeof(struct kvm_pic_state)); + spin_unlock(&pic_irqchip(kvm)->lock); break; case KVM_IRQCHIP_IOAPIC: + mutex_lock(&kvm->irq_lock); memcpy(ioapic_irqchip(kvm), &chip->chip.ioapic, sizeof(struct kvm_ioapic_state)); + mutex_unlock(&kvm->irq_lock); break; default: r = -EINVAL; @@ -2013,7 +2019,9 @@ static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) { int r = 0; + mutex_lock(&kvm->arch.vpit->pit_state.lock); memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); + mutex_unlock(&kvm->arch.vpit->pit_state.lock); return r; } @@ -2021,8 +2029,10 @@ static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) { int r = 0; + mutex_lock(&kvm->arch.vpit->pit_state.lock); memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); kvm_pit_load_count(kvm, 0, ps->channels[0].count); + mutex_unlock(&kvm->arch.vpit->pit_state.lock); return r; } @@ -2031,7 +2041,9 @@ static int kvm_vm_ioctl_reinject(struct kvm *kvm, { if (!kvm->arch.vpit) return -ENXIO; + mutex_lock(&kvm->arch.vpit->pit_state.lock); kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; + mutex_unlock(&kvm->arch.vpit->pit_state.lock); return 0; } diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 8361662e7e0a..f1e2e8c373c6 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2274,10 +2274,12 @@ static long kvm_vm_ioctl(struct file *filp, #ifdef CONFIG_KVM_APIC_ARCHITECTURE case KVM_SET_BOOT_CPU_ID: r = 0; + mutex_lock(&kvm->lock); if (atomic_read(&kvm->online_vcpus) != 0) r = -EBUSY; else kvm->bsp_vcpu_id = arg; + mutex_unlock(&kvm->lock); break; #endif default: |