The kvm_irqchip_commit_routes() is relatively expensive, so
provide the users a choice to commit the route immediately
or not when they add msi/msix route.
Signed-off-by: Longpeng(Mike) <longpe...@huawei.com>
---
accel/kvm/kvm-all.c | 10 +++++++---
accel/stubs/kvm-stub.c | 3 ++-
hw/misc/ivshmem.c | 2 +-
hw/vfio/pci.c | 2 +-
hw/virtio/virtio-pci.c | 2 +-
include/sysemu/kvm.h | 4 +++-
target/i386/kvm/kvm.c | 2 +-
7 files changed, 16 insertions(+), 9 deletions(-)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 0125c17..1f788a2 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -1950,7 +1950,8 @@ int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
return kvm_set_irq(s, route->kroute.gsi, 1);
}
-int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
+int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev,
+ bool defer_commit)
{
struct kvm_irq_routing_entry kroute = {};
int virq;
@@ -1993,7 +1994,9 @@ int kvm_irqchip_add_msi_route(KVMState *s, int vector,
PCIDevice *dev)
kvm_add_routing_entry(s, &kroute);
kvm_arch_add_msi_route_post(&kroute, vector, dev);
- kvm_irqchip_commit_routes(s);
+ if (!defer_commit) {
+ kvm_irqchip_commit_routes(s);
+ }
return virq;
}
@@ -2151,7 +2154,8 @@ int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
abort();
}
-int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
+int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev,
+ bool defer_commit)
{
return -ENOSYS;
}
diff --git a/accel/stubs/kvm-stub.c b/accel/stubs/kvm-stub.c
index 5b1d00a..d5caaca 100644
--- a/accel/stubs/kvm-stub.c
+++ b/accel/stubs/kvm-stub.c
@@ -81,7 +81,8 @@ int kvm_on_sigbus(int code, void *addr)
}
#ifndef CONFIG_USER_ONLY
-int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
+int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev,
+ bool defer_commit)
{
return -ENOSYS;
}
diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
index 1ba4a98..98b14cc 100644
--- a/hw/misc/ivshmem.c
+++ b/hw/misc/ivshmem.c
@@ -429,7 +429,7 @@ static void ivshmem_add_kvm_msi_virq(IVShmemState *s, int
vector,
IVSHMEM_DPRINTF("ivshmem_add_kvm_msi_virq vector:%d\n", vector);
assert(!s->msi_vectors[vector].pdev);
- ret = kvm_irqchip_add_msi_route(kvm_state, vector, pdev);
+ ret = kvm_irqchip_add_msi_route(kvm_state, vector, pdev, false);
if (ret < 0) {
error_setg(errp, "kvm_irqchip_add_msi_route failed");
return;
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index ca37fb7..3ab67d6 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -427,7 +427,7 @@ static void vfio_add_kvm_msi_virq(VFIOPCIDevice *vdev,
VFIOMSIVector *vector,
return;
}
- virq = kvm_irqchip_add_msi_route(kvm_state, vector_n, &vdev->pdev);
+ virq = kvm_irqchip_add_msi_route(kvm_state, vector_n, &vdev->pdev, false);
if (virq < 0) {
event_notifier_cleanup(&vector->kvm_interrupt);
return;
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 433060a..7e2d021 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -684,7 +684,7 @@ static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy
*proxy,
int ret;
if (irqfd->users == 0) {
- ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev);
+ ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev,
false);
if (ret < 0) {
return ret;
}
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index a1ab1ee..1932dc0 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -473,9 +473,11 @@ void kvm_init_cpu_signals(CPUState *cpu);
* message.
* @dev: Owner PCI device to add the route. If @dev is specified
* as @NULL, an empty MSI message will be inited.
+ * @defer_commit: Defer to commit new route to the KVM core.
* @return: virq (>=0) when success, errno (<0) when failed.
*/
-int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev);
+int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev,
+ bool defer_commit);
int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
PCIDevice *dev);
void kvm_irqchip_commit_routes(KVMState *s);
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index e69abe4..896406b 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -4724,7 +4724,7 @@ void kvm_arch_init_irq_routing(KVMState *s)
/* If the ioapic is in QEMU and the lapics are in KVM, reserve
MSI routes for signaling interrupts to the local apics. */
for (i = 0; i < IOAPIC_NUM_PINS; i++) {
- if (kvm_irqchip_add_msi_route(s, 0, NULL) < 0) {
+ if (kvm_irqchip_add_msi_route(s, 0, NULL, false) < 0) {
error_report("Could not enable split IRQ mode.");
exit(1);
}
--
1.8.3.1
