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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2012-11-28 05:28:58 +0400 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2012-11-28 05:29:11 +0400 |
| commit | 886b470cb14733a0286e365c77f1844c240c33a4 (patch) | |
| tree | a62f7af3ef4df07d7c1f9f949f0fc2007178ba0e /arch/x86/kvm | |
| parent | 51c19b4f5927f5a646e93d69f73c7e89ea14e737 (diff) | |
| download | linux-886b470cb14733a0286e365c77f1844c240c33a4.tar.xz | |
KVM: x86: pass host_tsc to read_l1_tsc
Allow the caller to pass host tsc value to kvm_x86_ops->read_l1_tsc().
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/svm.c | 4 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx.c | 5 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 5 |
4 files changed, 8 insertions, 8 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 43e9fadca5d0..9392f527f107 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1011,7 +1011,7 @@ static void start_apic_timer(struct kvm_lapic *apic) local_irq_save(flags); now = apic->lapic_timer.timer.base->get_time(); - guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu); + guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu, native_read_tsc()); if (likely(tscdeadline > guest_tsc)) { ns = (tscdeadline - guest_tsc) * 1000000ULL; do_div(ns, this_tsc_khz); diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index e93908fabf46..94f5ceba7e1e 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -3005,11 +3005,11 @@ static int cr8_write_interception(struct vcpu_svm *svm) return 0; } -u64 svm_read_l1_tsc(struct kvm_vcpu *vcpu) +u64 svm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) { struct vmcb *vmcb = get_host_vmcb(to_svm(vcpu)); return vmcb->control.tsc_offset + - svm_scale_tsc(vcpu, native_read_tsc()); + svm_scale_tsc(vcpu, host_tsc); } static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 6599e45f73f6..896efd4842e7 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1839,11 +1839,10 @@ static u64 guest_read_tsc(void) * Like guest_read_tsc, but always returns L1's notion of the timestamp * counter, even if a nested guest (L2) is currently running. */ -u64 vmx_read_l1_tsc(struct kvm_vcpu *vcpu) +u64 vmx_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) { - u64 host_tsc, tsc_offset; + u64 tsc_offset; - rdtscll(host_tsc); tsc_offset = is_guest_mode(vcpu) ? to_vmx(vcpu)->nested.vmcs01_tsc_offset : vmcs_read64(TSC_OFFSET); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 1dfe9d318734..1155059c512e 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1150,7 +1150,7 @@ static int kvm_guest_time_update(struct kvm_vcpu *v) /* Keep irq disabled to prevent changes to the clock */ local_irq_save(flags); - tsc_timestamp = kvm_x86_ops->read_l1_tsc(v); + tsc_timestamp = kvm_x86_ops->read_l1_tsc(v, native_read_tsc()); kernel_ns = get_kernel_ns(); this_tsc_khz = __get_cpu_var(cpu_tsc_khz); if (unlikely(this_tsc_khz == 0)) { @@ -5338,7 +5338,8 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) if (hw_breakpoint_active()) hw_breakpoint_restore(); - vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu); + vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu, + native_read_tsc()); vcpu->mode = OUTSIDE_GUEST_MODE; smp_wmb(); |