diff options
| author | Sheng Yang <sheng.yang@intel.com> | 2008-03-07 19:03:52 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-03-07 18:13:43 +0200 |
| commit | 7329670b5136900a05a31bcb1b0cf5d35d434519 (patch) | |
| tree | 40dc411a5bbefd4f6768b4cd2052317537baac2c /libkvm | |
| parent | 79b32b011c01f8c416785c66535260f75591c625 (diff) | |
kvm: libkvm: Add interface for PIT save/restore supporting
Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'libkvm')
| -rw-r--r-- | libkvm/libkvm-x86.c | 30 | ||||
| -rw-r--r-- | libkvm/libkvm.h | 26 |
2 files changed, 56 insertions, 0 deletions
diff --git a/libkvm/libkvm-x86.c b/libkvm/libkvm-x86.c index d19d17f8..d1809fd1 100644 --- a/libkvm/libkvm-x86.c +++ b/libkvm/libkvm-x86.c @@ -361,6 +361,36 @@ int kvm_set_lapic(kvm_context_t kvm, int vcpu, struct kvm_lapic_state *s) #endif +#ifdef KVM_CAP_PIT + +int kvm_get_pit(kvm_context_t kvm, struct kvm_pit_state *s) +{ + int r; + if (!kvm->pit_in_kernel) + return 0; + r = ioctl(kvm->vm_fd, KVM_GET_PIT, s); + if (r == -1) { + r = -errno; + perror("kvm_get_pit"); + } + return r; +} + +int kvm_set_pit(kvm_context_t kvm, struct kvm_pit_state *s) +{ + int r; + if (!kvm->pit_in_kernel) + return 0; + r = ioctl(kvm->vm_fd, KVM_SET_PIT, s); + if (r == -1) { + r = -errno; + perror("kvm_set_pit"); + } + return r; +} + +#endif + void kvm_show_code(kvm_context_t kvm, int vcpu) { #define CR0_PE_MASK (1ULL<<0) diff --git a/libkvm/libkvm.h b/libkvm/libkvm.h index 395434cf..4b40d2cb 100644 --- a/libkvm/libkvm.h +++ b/libkvm/libkvm.h @@ -525,8 +525,34 @@ int kvm_get_lapic(kvm_context_t kvm, int vcpu, struct kvm_lapic_state *s); * \param s Local apic state of the specific virtual CPU */ int kvm_set_lapic(kvm_context_t kvm, int vcpu, struct kvm_lapic_state *s); + +#endif + #endif +#ifdef KVM_CAP_PIT + +/*! + * \brief Get in kernel PIT of the virtual domain + * + * Save the PIT state. + * + * \param kvm Pointer to the current kvm_context + * \param s PIT state of the virtual domain + */ +int kvm_get_pit(kvm_context_t kvm, struct kvm_pit_state *s); + +/*! + * \brief Set in kernel PIT of the virtual domain + * + * Restore the PIT state. + * Timer would be retriggerred after restored. + * + * \param kvm Pointer to the current kvm_context + * \param s PIT state of the virtual domain + */ +int kvm_set_pit(kvm_context_t kvm, struct kvm_pit_state *s); + #endif #ifdef KVM_CAP_VAPIC |