diff options
| -rw-r--r-- | arch/x86/kvm/lapic.c | 51 | ||||
| -rw-r--r-- | arch/x86/kvm/lapic.h | 6 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 55 | ||||
| -rw-r--r-- | include/linux/kvm.h | 7 | ||||
| -rw-r--r-- | include/linux/kvm_para.h | 2 |
5 files changed, 120 insertions, 1 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 50c3f3a8dd3d..e7513bb98af1 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -815,7 +815,8 @@ void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8) if (!apic) return; - apic_set_tpr(apic, ((cr8 & 0x0f) << 4)); + apic_set_tpr(apic, ((cr8 & 0x0f) << 4) + | (apic_get_reg(apic, APIC_TASKPRI) & 4)); } u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu) @@ -1104,3 +1105,51 @@ void kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) hrtimer_start(timer, timer->expires, HRTIMER_MODE_ABS); } EXPORT_SYMBOL_GPL(kvm_migrate_apic_timer); + +void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu) +{ + u32 data; + void *vapic; + + if (!irqchip_in_kernel(vcpu->kvm) || !vcpu->arch.apic->vapic_addr) + return; + + vapic = kmap_atomic(vcpu->arch.apic->vapic_page, KM_USER0); + data = *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)); + kunmap_atomic(vapic, KM_USER0); + + apic_set_tpr(vcpu->arch.apic, data & 0xff); +} + +void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu) +{ + u32 data, tpr; + int max_irr, max_isr; + struct kvm_lapic *apic; + void *vapic; + + if (!irqchip_in_kernel(vcpu->kvm) || !vcpu->arch.apic->vapic_addr) + return; + + apic = vcpu->arch.apic; + tpr = apic_get_reg(apic, APIC_TASKPRI) & 0xff; + max_irr = apic_find_highest_irr(apic); + if (max_irr < 0) + max_irr = 0; + max_isr = apic_find_highest_isr(apic); + if (max_isr < 0) + max_isr = 0; + data = (tpr & 0xff) | ((max_isr & 0xf0) << 8) | (max_irr << 24); + + vapic = kmap_atomic(vcpu->arch.apic->vapic_page, KM_USER0); + *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)) = data; + kunmap_atomic(vapic, KM_USER0); +} + +void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr) +{ + if (!irqchip_in_kernel(vcpu->kvm)) + return; + + vcpu->arch.apic->vapic_addr = vapic_addr; +} diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h index 447b654aefbb..676c396c9cee 100644 --- a/arch/x86/kvm/lapic.h +++ b/arch/x86/kvm/lapic.h @@ -18,6 +18,8 @@ struct kvm_lapic { struct kvm_vcpu *vcpu; struct page *regs_page; void *regs; + gpa_t vapic_addr; + struct page *vapic_page; }; int kvm_create_lapic(struct kvm_vcpu *vcpu); void kvm_free_lapic(struct kvm_vcpu *vcpu); @@ -41,4 +43,8 @@ int kvm_lapic_enabled(struct kvm_vcpu *vcpu); int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu); void kvm_apic_timer_intr_post(struct kvm_vcpu *vcpu, int vec); +void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr); +void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu); +void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu); + #endif diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index c2b80884447e..e7eac27adb7f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1173,6 +1173,19 @@ long kvm_arch_vcpu_ioctl(struct file *filp, r = 0; break; }; + case KVM_SET_VAPIC_ADDR: { + struct kvm_vapic_addr va; + + r = -EINVAL; + if (!irqchip_in_kernel(vcpu->kvm)) + goto out; + r = -EFAULT; + if (copy_from_user(&va, argp, sizeof va)) + goto out; + r = 0; + kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); + break; + } default: r = -EINVAL; } @@ -2214,6 +2227,9 @@ int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) } switch (nr) { + case KVM_HC_VAPIC_POLL_IRQ: + ret = 0; + break; default: ret = -KVM_ENOSYS; break; @@ -2421,6 +2437,29 @@ static void post_kvm_run_save(struct kvm_vcpu *vcpu, vcpu->arch.irq_summary == 0); } +static void vapic_enter(struct kvm_vcpu *vcpu) +{ + struct kvm_lapic *apic = vcpu->arch.apic; + struct page *page; + + if (!apic || !apic->vapic_addr) + return; + + page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); + vcpu->arch.apic->vapic_page = page; +} + +static void vapic_exit(struct kvm_vcpu *vcpu) +{ + struct kvm_lapic *apic = vcpu->arch.apic; + + if (!apic || !apic->vapic_addr) + return; + + kvm_release_page_dirty(apic->vapic_page); + mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); +} + static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) { int r; @@ -2435,6 +2474,8 @@ static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE; } + vapic_enter(vcpu); + preempted: if (vcpu->guest_debug.enabled) kvm_x86_ops->guest_debug_pre(vcpu); @@ -2444,6 +2485,14 @@ again: if (unlikely(r)) goto out; + if (vcpu->requests) + if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, + &vcpu->requests)) { + kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS; + r = 0; + goto out; + } + kvm_inject_pending_timer_irqs(vcpu); preempt_disable(); @@ -2469,6 +2518,8 @@ again: else kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run); + kvm_lapic_sync_to_vapic(vcpu); + vcpu->guest_mode = 1; kvm_guest_enter(); @@ -2506,6 +2557,8 @@ again: if (vcpu->arch.exception.pending && kvm_x86_ops->exception_injected(vcpu)) vcpu->arch.exception.pending = false; + kvm_lapic_sync_from_vapic(vcpu); + r = kvm_x86_ops->handle_exit(kvm_run, vcpu); if (r > 0) { @@ -2527,6 +2580,8 @@ out: post_kvm_run_save(vcpu, kvm_run); + vapic_exit(vcpu); + return r; } diff --git a/include/linux/kvm.h b/include/linux/kvm.h index 850f5ef76636..b27a381db5e8 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -216,6 +216,11 @@ struct kvm_tpr_access_ctl { __u32 reserved[8]; }; +/* for KVM_SET_VAPIC_ADDR */ +struct kvm_vapic_addr { + __u64 vapic_addr; +}; + #define KVMIO 0xAE /* @@ -291,5 +296,7 @@ struct kvm_tpr_access_ctl { #define KVM_GET_CPUID2 _IOWR(KVMIO, 0x91, struct kvm_cpuid2) /* Available with KVM_CAP_VAPIC */ #define KVM_TPR_ACCESS_REPORTING _IOWR(KVMIO, 0x92, struct kvm_tpr_access_ctl) +/* Available with KVM_CAP_VAPIC */ +#define KVM_SET_VAPIC_ADDR _IOW(KVMIO, 0x93, struct kvm_vapic_addr) #endif diff --git a/include/linux/kvm_para.h b/include/linux/kvm_para.h index e4db25ffdb52..6af91a506fbf 100644 --- a/include/linux/kvm_para.h +++ b/include/linux/kvm_para.h @@ -12,6 +12,8 @@ /* Return values for hypercalls */ #define KVM_ENOSYS 1000 +#define KVM_HC_VAPIC_POLL_IRQ 1 + #ifdef __KERNEL__ /* * hypercalls use architecture specific |