diff options
Diffstat (limited to 'arch/arm/kvm/arm.c')
| -rw-r--r-- | arch/arm/kvm/arm.c | 66 |
1 files changed, 36 insertions, 30 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index e3c8105ada65..8966e59806aa 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -53,7 +53,6 @@ __asm__(".arch_extension virt"); static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page); static kvm_cpu_context_t __percpu *kvm_host_cpu_state; -static unsigned long hyp_default_vectors; /* Per-CPU variable containing the currently running vcpu. */ static DEFINE_PER_CPU(struct kvm_vcpu *, kvm_arm_running_vcpu); @@ -227,6 +226,13 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) else r = kvm->arch.vgic.msis_require_devid; break; + case KVM_CAP_ARM_USER_IRQ: + /* + * 1: EL1_VTIMER, EL1_PTIMER, and PMU. + * (bump this number if adding more devices) + */ + r = 1; + break; default: r = kvm_arch_dev_ioctl_check_extension(kvm, ext); break; @@ -348,15 +354,14 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) vcpu->arch.host_cpu_context = this_cpu_ptr(kvm_host_cpu_state); kvm_arm_set_running_vcpu(vcpu); + + kvm_vgic_load(vcpu); } void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) { - /* - * The arch-generic KVM code expects the cpu field of a vcpu to be -1 - * if the vcpu is no longer assigned to a cpu. This is used for the - * optimized make_all_cpus_request path. - */ + kvm_vgic_put(vcpu); + vcpu->cpu = -1; kvm_arm_set_running_vcpu(NULL); @@ -514,13 +519,7 @@ static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) return ret; } - /* - * Enable the arch timers only if we have an in-kernel VGIC - * and it has been properly initialized, since we cannot handle - * interrupts from the virtual timer with a userspace gic. - */ - if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) - ret = kvm_timer_enable(vcpu); + ret = kvm_timer_enable(vcpu); return ret; } @@ -630,16 +629,23 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) * non-preemptible context. */ preempt_disable(); + kvm_pmu_flush_hwstate(vcpu); + kvm_timer_flush_hwstate(vcpu); kvm_vgic_flush_hwstate(vcpu); local_irq_disable(); /* - * Re-check atomic conditions + * If we have a singal pending, or need to notify a userspace + * irqchip about timer or PMU level changes, then we exit (and + * update the timer level state in kvm_timer_update_run + * below). */ - if (signal_pending(current)) { + if (signal_pending(current) || + kvm_timer_should_notify_user(vcpu) || + kvm_pmu_should_notify_user(vcpu)) { ret = -EINTR; run->exit_reason = KVM_EXIT_INTR; } @@ -711,6 +717,12 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) ret = handle_exit(vcpu, run, ret); } + /* Tell userspace about in-kernel device output levels */ + if (unlikely(!irqchip_in_kernel(vcpu->kvm))) { + kvm_timer_update_run(vcpu); + kvm_pmu_update_run(vcpu); + } + if (vcpu->sigset_active) sigprocmask(SIG_SETMASK, &sigsaved, NULL); return ret; @@ -1109,8 +1121,16 @@ static void cpu_init_hyp_mode(void *dummy) kvm_arm_init_debug(); } +static void cpu_hyp_reset(void) +{ + if (!is_kernel_in_hyp_mode()) + __hyp_reset_vectors(); +} + static void cpu_hyp_reinit(void) { + cpu_hyp_reset(); + if (is_kernel_in_hyp_mode()) { /* * __cpu_init_stage2() is safe to call even if the PM @@ -1118,18 +1138,10 @@ static void cpu_hyp_reinit(void) */ __cpu_init_stage2(); } else { - if (__hyp_get_vectors() == hyp_default_vectors) - cpu_init_hyp_mode(NULL); + cpu_init_hyp_mode(NULL); } } -static void cpu_hyp_reset(void) -{ - if (!is_kernel_in_hyp_mode()) - __cpu_reset_hyp_mode(hyp_default_vectors, - kvm_get_idmap_start()); -} - static void _kvm_arch_hardware_enable(void *discard) { if (!__this_cpu_read(kvm_arm_hardware_enabled)) { @@ -1313,12 +1325,6 @@ static int init_hyp_mode(void) goto out_err; /* - * It is probably enough to obtain the default on one - * CPU. It's unlikely to be different on the others. - */ - hyp_default_vectors = __hyp_get_vectors(); - - /* * Allocate stack pages for Hypervisor-mode */ for_each_possible_cpu(cpu) { |