From aa2fbe6d44892070d78995f0df875ce930904e29 Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Thu, 11 Apr 2013 19:21:40 +0800 Subject: [PATCH] KVM: Let ioapic know the irq line status Userspace may deliver RTC interrupt without query the status. So we want to track RTC EOI for this case. Signed-off-by: Yang Zhang Reviewed-by: Gleb Natapov Signed-off-by: Marcelo Tosatti --- arch/x86/kvm/i8254.c | 4 ++-- arch/x86/kvm/x86.c | 6 ++++-- include/linux/kvm_host.h | 11 +++++++---- virt/kvm/assigned-dev.c | 13 +++++++------ virt/kvm/eventfd.c | 15 +++++++++------ virt/kvm/ioapic.c | 18 ++++++++++-------- virt/kvm/ioapic.h | 2 +- virt/kvm/irq_comm.c | 19 ++++++++++++------- virt/kvm/kvm_main.c | 3 ++- 9 files changed, 54 insertions(+), 37 deletions(-) diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c index c1d30b2fc9bb..412a5aa0ef94 100644 --- a/arch/x86/kvm/i8254.c +++ b/arch/x86/kvm/i8254.c @@ -290,8 +290,8 @@ static void pit_do_work(struct kthread_work *work) } spin_unlock(&ps->inject_lock); if (inject) { - kvm_set_irq(kvm, kvm->arch.vpit->irq_source_id, 0, 1); - kvm_set_irq(kvm, kvm->arch.vpit->irq_source_id, 0, 0); + kvm_set_irq(kvm, kvm->arch.vpit->irq_source_id, 0, 1, false); + kvm_set_irq(kvm, kvm->arch.vpit->irq_source_id, 0, 0, false); /* * Provides NMI watchdog support via Virtual Wire mode. diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 999d1243a6ce..ae9744d03c83 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3491,13 +3491,15 @@ out: return r; } -int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event) +int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, + bool line_status) { if (!irqchip_in_kernel(kvm)) return -ENXIO; irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, - irq_event->irq, irq_event->level); + irq_event->irq, irq_event->level, + line_status); return 0; } diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 20d77d24d764..4a76aca31478 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -292,7 +292,8 @@ struct kvm_kernel_irq_routing_entry { u32 gsi; u32 type; int (*set)(struct kvm_kernel_irq_routing_entry *e, - struct kvm *kvm, int irq_source_id, int level); + struct kvm *kvm, int irq_source_id, int level, + bool line_status); union { struct { unsigned irqchip; @@ -591,7 +592,8 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem); -int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level); +int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, + bool line_status); long kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg); @@ -722,10 +724,11 @@ void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic, union kvm_ioapic_redirect_entry *entry, unsigned long *deliver_bitmask); #endif -int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level); +int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level, + bool line_status); int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level); int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm, - int irq_source_id, int level); + int irq_source_id, int level, bool line_status); bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin); void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); void kvm_register_irq_ack_notifier(struct kvm *kvm, diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c index 3642239252b0..f4c7f591b5d8 100644 --- a/virt/kvm/assigned-dev.c +++ b/virt/kvm/assigned-dev.c @@ -80,11 +80,12 @@ kvm_assigned_dev_raise_guest_irq(struct kvm_assigned_dev_kernel *assigned_dev, spin_lock(&assigned_dev->intx_mask_lock); if (!(assigned_dev->flags & KVM_DEV_ASSIGN_MASK_INTX)) kvm_set_irq(assigned_dev->kvm, - assigned_dev->irq_source_id, vector, 1); + assigned_dev->irq_source_id, vector, 1, + false); spin_unlock(&assigned_dev->intx_mask_lock); } else kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id, - vector, 1); + vector, 1, false); } static irqreturn_t kvm_assigned_dev_thread_intx(int irq, void *dev_id) @@ -165,7 +166,7 @@ static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) container_of(kian, struct kvm_assigned_dev_kernel, ack_notifier); - kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0); + kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0, false); spin_lock(&dev->intx_mask_lock); @@ -188,7 +189,7 @@ static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) if (reassert) kvm_set_irq(dev->kvm, dev->irq_source_id, - dev->guest_irq, 1); + dev->guest_irq, 1, false); } spin_unlock(&dev->intx_mask_lock); @@ -202,7 +203,7 @@ static void deassign_guest_irq(struct kvm *kvm, &assigned_dev->ack_notifier); kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id, - assigned_dev->guest_irq, 0); + assigned_dev->guest_irq, 0, false); if (assigned_dev->irq_source_id != -1) kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id); @@ -901,7 +902,7 @@ static int kvm_vm_ioctl_set_pci_irq_mask(struct kvm *kvm, if (match->irq_requested_type & KVM_DEV_IRQ_GUEST_INTX) { if (assigned_dev->flags & KVM_DEV_ASSIGN_MASK_INTX) { kvm_set_irq(match->kvm, match->irq_source_id, - match->guest_irq, 0); + match->guest_irq, 0, false); /* * Masking at hardware-level is performed on demand, * i.e. when an IRQ actually arrives at the host. diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index 48790989f8d2..c5d43ffbf1f3 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -100,11 +100,13 @@ irqfd_inject(struct work_struct *work) struct kvm *kvm = irqfd->kvm; if (!irqfd->resampler) { - kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, irqfd->gsi, 1); - kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, irqfd->gsi, 0); + kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, irqfd->gsi, 1, + false); + kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, irqfd->gsi, 0, + false); } else kvm_set_irq(kvm, KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, - irqfd->gsi, 1); + irqfd->gsi, 1, false); } /* @@ -121,7 +123,7 @@ irqfd_resampler_ack(struct kvm_irq_ack_notifier *kian) resampler = container_of(kian, struct _irqfd_resampler, notifier); kvm_set_irq(resampler->kvm, KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, - resampler->notifier.gsi, 0); + resampler->notifier.gsi, 0, false); rcu_read_lock(); @@ -146,7 +148,7 @@ irqfd_resampler_shutdown(struct _irqfd *irqfd) list_del(&resampler->link); kvm_unregister_irq_ack_notifier(kvm, &resampler->notifier); kvm_set_irq(kvm, KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, - resampler->notifier.gsi, 0); + resampler->notifier.gsi, 0, false); kfree(resampler); } @@ -225,7 +227,8 @@ irqfd_wakeup(wait_queue_t *wait, unsigned mode, int sync, void *key) irq = rcu_dereference(irqfd->irq_entry); /* An event has been signaled, inject an interrupt */ if (irq) - kvm_set_msi(irq, kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 1); + kvm_set_msi(irq, kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 1, + false); else schedule_work(&irqfd->inject); rcu_read_unlock(); diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c index 76528fff252d..a49fcd55b378 100644 --- a/virt/kvm/ioapic.c +++ b/virt/kvm/ioapic.c @@ -50,7 +50,8 @@ #else #define ioapic_debug(fmt, arg...) #endif -static int ioapic_deliver(struct kvm_ioapic *vioapic, int irq); +static int ioapic_deliver(struct kvm_ioapic *vioapic, int irq, + bool line_status); static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic, unsigned long addr, @@ -146,7 +147,8 @@ static void kvm_rtc_eoi_tracking_restore_all(struct kvm_ioapic *ioapic) __rtc_irq_eoi_tracking_restore_one(vcpu); } -static int ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx) +static int ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx, + bool line_status) { union kvm_ioapic_redirect_entry *pent; int injected = -1; @@ -154,7 +156,7 @@ static int ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx) pent = &ioapic->redirtbl[idx]; if (!pent->fields.mask) { - injected = ioapic_deliver(ioapic, idx); + injected = ioapic_deliver(ioapic, idx, line_status); if (injected && pent->fields.trig_mode == IOAPIC_LEVEL_TRIG) pent->fields.remote_irr = 1; } @@ -248,13 +250,13 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val) kvm_fire_mask_notifiers(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index, mask_after); if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG && ioapic->irr & (1 << index)) - ioapic_service(ioapic, index); + ioapic_service(ioapic, index, false); kvm_ioapic_make_eoibitmap_request(ioapic->kvm); break; } } -static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq) +static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq, bool line_status) { union kvm_ioapic_redirect_entry *entry = &ioapic->redirtbl[irq]; struct kvm_lapic_irq irqe; @@ -277,7 +279,7 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq) } int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id, - int level) + int level, bool line_status) { u32 old_irr; u32 mask = 1 << irq; @@ -300,7 +302,7 @@ int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id, ioapic->irr |= mask; if ((edge && old_irr != ioapic->irr) || (!edge && !entry.fields.remote_irr)) - ret = ioapic_service(ioapic, irq); + ret = ioapic_service(ioapic, irq, line_status); else ret = 0; /* report coalesced interrupt */ } @@ -349,7 +351,7 @@ static void __kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, ASSERT(ent->fields.trig_mode == IOAPIC_LEVEL_TRIG); ent->fields.remote_irr = 0; if (!ent->fields.mask && (ioapic->irr & (1 << i))) - ioapic_service(ioapic, i); + ioapic_service(ioapic, i, false); } } diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h index 313fc4ea61d9..554157bbb586 100644 --- a/virt/kvm/ioapic.h +++ b/virt/kvm/ioapic.h @@ -89,7 +89,7 @@ bool kvm_ioapic_handles_vector(struct kvm *kvm, int vector); int kvm_ioapic_init(struct kvm *kvm); void kvm_ioapic_destroy(struct kvm *kvm); int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id, - int level); + int level, bool line_status); void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id); void kvm_ioapic_reset(struct kvm_ioapic *ioapic); int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src, diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c index 2f07d2e59a2d..8efb580edfef 100644 --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -35,7 +35,8 @@ #include "ioapic.h" static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e, - struct kvm *kvm, int irq_source_id, int level) + struct kvm *kvm, int irq_source_id, int level, + bool line_status) { #ifdef CONFIG_X86 struct kvm_pic *pic = pic_irqchip(kvm); @@ -46,10 +47,12 @@ static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e, } static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e, - struct kvm *kvm, int irq_source_id, int level) + struct kvm *kvm, int irq_source_id, int level, + bool line_status) { struct kvm_ioapic *ioapic = kvm->arch.vioapic; - return kvm_ioapic_set_irq(ioapic, e->irqchip.pin, irq_source_id, level); + return kvm_ioapic_set_irq(ioapic, e->irqchip.pin, irq_source_id, level, + line_status); } inline static bool kvm_is_dm_lowest_prio(struct kvm_lapic_irq *irq) @@ -121,7 +124,7 @@ static inline void kvm_set_msi_irq(struct kvm_kernel_irq_routing_entry *e, } int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, - struct kvm *kvm, int irq_source_id, int level) + struct kvm *kvm, int irq_source_id, int level, bool line_status) { struct kvm_lapic_irq irq; @@ -159,7 +162,7 @@ int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi) route.msi.address_hi = msi->address_hi; route.msi.data = msi->data; - return kvm_set_msi(&route, kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 1); + return kvm_set_msi(&route, kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 1, false); } /* @@ -168,7 +171,8 @@ int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi) * = 0 Interrupt was coalesced (previous irq is still pending) * > 0 Number of CPUs interrupt was delivered to */ -int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level) +int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level, + bool line_status) { struct kvm_kernel_irq_routing_entry *e, irq_set[KVM_NR_IRQCHIPS]; int ret = -1, i = 0; @@ -189,7 +193,8 @@ int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level) while(i--) { int r; - r = irq_set[i].set(&irq_set[i], kvm, irq_source_id, level); + r = irq_set[i].set(&irq_set[i], kvm, irq_source_id, level, + line_status); if (r < 0) continue; diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 5cc53c907d3b..ac3182eed462 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2258,7 +2258,8 @@ static long kvm_vm_ioctl(struct file *filp, if (copy_from_user(&irq_event, argp, sizeof irq_event)) goto out; - r = kvm_vm_ioctl_irq_line(kvm, &irq_event); + r = kvm_vm_ioctl_irq_line(kvm, &irq_event, + ioctl == KVM_IRQ_LINE_STATUS); if (r) goto out; -- 2.30.2