diff options
| author | Sheng Yang | 2008-03-03 17:50:59 +0100 |
|---|---|---|
| committer | Avi Kivity | 2008-04-27 11:00:22 +0200 |
| commit | e0f63cb9277b64850854aee301762beeeb463473 (patch) | |
| tree | ae10bac92ee6cc1a658b479a311fac67ebd3524c /arch/x86/kvm/x86.c | |
| parent | KVM: In kernel PIT model (diff) | |
| download | kernel-qcow2-linux-e0f63cb9277b64850854aee301762beeeb463473.tar.gz kernel-qcow2-linux-e0f63cb9277b64850854aee301762beeeb463473.tar.xz kernel-qcow2-linux-e0f63cb9277b64850854aee301762beeeb463473.zip | |
KVM: Add save/restore supporting of in kernel PIT
Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index c33a4578132c..621a8e362fe7 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1504,6 +1504,23 @@ static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) return r; } +static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) +{ + int r = 0; + + memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); + return r; +} + +static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) +{ + int r = 0; + + memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); + kvm_pit_load_count(kvm, 0, ps->channels[0].count); + return r; +} + /* * Get (and clear) the dirty memory log for a memory slot. */ @@ -1657,6 +1674,37 @@ long kvm_arch_vm_ioctl(struct file *filp, r = 0; break; } + case KVM_GET_PIT: { + struct kvm_pit_state ps; + r = -EFAULT; + if (copy_from_user(&ps, argp, sizeof ps)) + goto out; + r = -ENXIO; + if (!kvm->arch.vpit) + goto out; + r = kvm_vm_ioctl_get_pit(kvm, &ps); + if (r) + goto out; + r = -EFAULT; + if (copy_to_user(argp, &ps, sizeof ps)) + goto out; + r = 0; + break; + } + case KVM_SET_PIT: { + struct kvm_pit_state ps; + r = -EFAULT; + if (copy_from_user(&ps, argp, sizeof ps)) + goto out; + r = -ENXIO; + if (!kvm->arch.vpit) + goto out; + r = kvm_vm_ioctl_set_pit(kvm, &ps); + if (r) + goto out; + r = 0; + break; + } default: ; } |