@@ -951,7 +951,7 @@ static void assigned_dev_update_msi(PCIDevice *pci_dev)
}
assigned_dev->entry->gsi = r;
- kvm_add_routing_entry(assigned_dev->entry);
+ kvm_add_routing_entry(assigned_dev->entry, NULL);
if (kvm_commit_irq_routes() < 0) {
perror("assigned_dev_update_msi: kvm_commit_irq_routes");
assigned_dev->cap.state &= ~ASSIGNED_DEVICE_MSI_ENABLED;
@@ -1039,7 +1039,7 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
adev->entry[entries_nr].u.msi.address_hi = msg_upper_addr;
adev->entry[entries_nr].u.msi.data = msg_data;
DEBUG("MSI-X data 0x%x, MSI-X addr_lo 0x%x\n!", msg_data, msg_addr);
- kvm_add_routing_entry(&adev->entry[entries_nr]);
+ kvm_add_routing_entry(&adev->entry[entries_nr], NULL);
msix_entry.gsi = adev->entry[entries_nr].gsi;
msix_entry.entry = i;
@@ -81,6 +81,7 @@ struct KVMState
int irqchip_inject_ioctl;
#ifdef KVM_CAP_IRQ_ROUTING
struct kvm_irq_routing *irq_routes;
+ MSIRoutingCache **msi_cache;
int nr_allocated_irq_routes;
#endif
void *used_gsi_bitmap;
@@ -253,7 +253,8 @@ int kvm_has_gsi_routing(void)
return r;
}
-int kvm_add_routing_entry(struct kvm_irq_routing_entry *entry)
+int kvm_add_routing_entry(struct kvm_irq_routing_entry *entry,
+ MSIRoutingCache *msi_cache)
{
#ifdef KVM_CAP_IRQ_ROUTING
KVMState *s = kvm_state;
@@ -274,6 +275,8 @@ int kvm_add_routing_entry(struct kvm_irq_routing_entry *entry)
}
s->nr_allocated_irq_routes = n;
s->irq_routes = z;
+
+ s->msi_cache = g_realloc(s->msi_cache, sizeof(*s->msi_cache) * n);
}
n = s->irq_routes->nr++;
new = &s->irq_routes->entries[n];
@@ -282,6 +285,7 @@ int kvm_add_routing_entry(struct kvm_irq_routing_entry *entry)
new->type = entry->type;
new->flags = entry->flags;
new->u = entry->u;
+ s->msi_cache[n] = msi_cache;
set_gsi(s, entry->gsi);
@@ -301,7 +305,7 @@ int kvm_add_irq_route(int gsi, int irqchip, int pin)
e.flags = 0;
e.u.irqchip.irqchip = irqchip;
e.u.irqchip.pin = pin;
- return kvm_add_routing_entry(&e);
+ return kvm_add_routing_entry(&e, NULL);
#else
return -ENOSYS;
#endif
@@ -312,6 +316,7 @@ int kvm_del_routing_entry(struct kvm_irq_routing_entry *entry)
#ifdef KVM_CAP_IRQ_ROUTING
KVMState *s = kvm_state;
struct kvm_irq_routing_entry *e, *p;
+ MSIRoutingCache *cache;
int i, gsi, found = 0;
gsi = entry->gsi;
@@ -324,8 +329,6 @@ int kvm_del_routing_entry(struct kvm_irq_routing_entry *entry)
if (e->u.irqchip.irqchip ==
entry->u.irqchip.irqchip
&& e->u.irqchip.pin == entry->u.irqchip.pin) {
- p = &s->irq_routes->entries[--s->irq_routes->nr];
- *e = *p;
found = 1;
}
break;
@@ -336,8 +339,6 @@ int kvm_del_routing_entry(struct kvm_irq_routing_entry *entry)
&& e->u.msi.address_hi ==
entry->u.msi.address_hi
&& e->u.msi.data == entry->u.msi.data) {
- p = &s->irq_routes->entries[--s->irq_routes->nr];
- *e = *p;
found = 1;
}
break;
@@ -346,6 +347,16 @@ int kvm_del_routing_entry(struct kvm_irq_routing_entry *entry)
break;
}
if (found) {
+ s->irq_routes->nr--;
+ p = &s->irq_routes->entries[s->irq_routes->nr];
+ *e = *p;
+
+ cache = s->msi_cache[i];
+ if (cache) {
+ cache->type = MSI_ROUTE_NONE;
+ }
+ s->msi_cache[i] = s->msi_cache[s->irq_routes->nr];
+
/* If there are no other users of this GSI
* mark it available in the bitmap */
for (i = 0; i < s->irq_routes->nr; i++) {
@@ -469,7 +480,7 @@ int kvm_msi_message_add(MSIMessage *msg, MSIRoutingCache *cache)
cache->kvm_irqfd = -1;
kvm_msi_routing_entry(&e, cache);
- return kvm_add_routing_entry(&e);
+ return kvm_add_routing_entry(&e, cache);
}
int kvm_msi_message_del(MSIRoutingCache *cache)
@@ -188,7 +188,8 @@ struct kvm_irq_routing_entry;
* Adds a filled routing entry to the temporary irq routing table. Nothing is
* committed to the running VM.
*/
-int kvm_add_routing_entry(struct kvm_irq_routing_entry *entry);
+int kvm_add_routing_entry(struct kvm_irq_routing_entry *entry,
+ MSIRoutingCache *msi_cache);
/*!
* \brief Removes a routing from the temporary irq routing table
Keep a link from the internal KVM routing table to potential MSI routing cache entries. The link is used so far whenever the entry is dropped to invalidate the cache content. It will allow us to build MSI routing entries on demand and flush existing ones on table overflow. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> --- hw/device-assignment.c | 4 ++-- kvm-all.c | 1 + qemu-kvm.c | 25 ++++++++++++++++++------- qemu-kvm.h | 3 ++- 4 files changed, 23 insertions(+), 10 deletions(-)