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authorYang Zhang <yang.z.zhang@Intel.com>2013-04-11 19:21:40 +0800
committerMarcelo Tosatti <mtosatti@redhat.com>2013-04-15 23:20:34 -0300
commitaa2fbe6d44892070d78995f0df875ce930904e29 (patch)
treebc2350a65c4e656df5597ebe4111bcfd98116bfe /virt
parentf3bff6318fa0f54956b02ed451d9b120441006ea (diff)
downloadlinux-stericsson-aa2fbe6d44892070d78995f0df875ce930904e29.tar.gz
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 <yang.z.zhang@Intel.com> Reviewed-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/assigned-dev.c13
-rw-r--r--virt/kvm/eventfd.c15
-rw-r--r--virt/kvm/ioapic.c18
-rw-r--r--virt/kvm/ioapic.h2
-rw-r--r--virt/kvm/irq_comm.c19
-rw-r--r--virt/kvm/kvm_main.c3
6 files changed, 41 insertions, 29 deletions
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;