diff mbox

[v10,18/26] ioapic: register IOMMU IEC notifier for ioapic

Message ID 1466495274-5011-19-git-send-email-peterx@redhat.com
State New
Headers show

Commit Message

Peter Xu June 21, 2016, 7:47 a.m. UTC 
Let IOAPIC the first consumer of x86 IOMMU IEC invalidation
notifiers. This is only used for split irqchip case, when vIOMMU
receives IR invalidation requests, IOAPIC will be notified to update
kernel irq routes. For simplicity, we just update all IOAPIC routes,
even if the invalidated entries are not IOAPIC ones.

Since now we are creating IOMMUs using "-device" parameter, IOMMU
device will be created after IOAPIC.  We need to do the registration
after machine done by leveraging machine_done notifier.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 hw/intc/ioapic.c                  | 29 +++++++++++++++++++++++++++++
 include/hw/i386/ioapic_internal.h |  2 ++
 2 files changed, 31 insertions(+)
diff mbox

Patch

diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c
index c4469e4..0c34e3e 100644
--- a/hw/intc/ioapic.c
+++ b/hw/intc/ioapic.c
@@ -31,6 +31,7 @@ 
 #include "sysemu/kvm.h"
 #include "target-i386/cpu.h"
 #include "hw/i386/apic-msidef.h"
+#include "hw/i386/x86-iommu.h"
 
 //#define DEBUG_IOAPIC
 
@@ -198,6 +199,14 @@  static void ioapic_update_kvm_routes(IOAPICCommonState *s)
 #endif
 }
 
+static void ioapic_iec_notifier(void *private, bool global,
+                                uint32_t index, uint32_t mask)
+{
+    IOAPICCommonState *s = (IOAPICCommonState *)private;
+    /* For simplicity, we just update all the routes */
+    ioapic_update_kvm_routes(s);
+}
+
 void ioapic_eoi_broadcast(int vector)
 {
     IOAPICCommonState *s;
@@ -354,6 +363,24 @@  static const MemoryRegionOps ioapic_io_ops = {
     .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
+static void ioapic_machine_done_notify(Notifier *notifier, void *data)
+{
+    IOAPICCommonState *s = container_of(notifier, IOAPICCommonState,
+                                        machine_done);
+
+#ifdef CONFIG_KVM
+    if (kvm_irqchip_is_split()) {
+        X86IOMMUState *iommu = x86_iommu_get_default();
+        if (iommu) {
+            /* Register this IOAPIC with IOMMU IEC notifier, so that
+             * when there are IR invalidates, we can be notified to
+             * update kernel IR cache. */
+            x86_iommu_iec_register_notifier(iommu, ioapic_iec_notifier, s);
+        }
+    }
+#endif
+}
+
 static void ioapic_realize(DeviceState *dev, Error **errp)
 {
     IOAPICCommonState *s = IOAPIC_COMMON(dev);
@@ -364,6 +391,8 @@  static void ioapic_realize(DeviceState *dev, Error **errp)
     qdev_init_gpio_in(dev, ioapic_set_irq, IOAPIC_NUM_PINS);
 
     ioapics[ioapic_no] = s;
+    s->machine_done.notify = ioapic_machine_done_notify;
+    qemu_add_machine_init_done_notifier(&s->machine_done);
 }
 
 static void ioapic_class_init(ObjectClass *klass, void *data)
diff --git a/include/hw/i386/ioapic_internal.h b/include/hw/i386/ioapic_internal.h
index 31dafb3..84e3deb 100644
--- a/include/hw/i386/ioapic_internal.h
+++ b/include/hw/i386/ioapic_internal.h
@@ -25,6 +25,7 @@ 
 #include "hw/hw.h"
 #include "exec/memory.h"
 #include "hw/sysbus.h"
+#include "qemu/notify.h"
 
 #define MAX_IOAPICS                     1
 
@@ -107,6 +108,7 @@  struct IOAPICCommonState {
     uint8_t ioregsel;
     uint32_t irr;
     uint64_t ioredtbl[IOAPIC_NUM_PINS];
+    Notifier machine_done;
 };
 
 void ioapic_reset_common(DeviceState *dev);