diff mbox

[v5,16/18] ioapic: register VT-d IEC invalidate notifier

Message ID 1461827144-6937-17-git-send-email-peterx@redhat.com
State New
Headers show

Commit Message

Peter Xu April 28, 2016, 7:05 a.m. UTC 
Let IOAPIC the first consumer of VT-d IEC invalidation notifiers. This
is only used for split irqchip case, when VT-d 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.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 hw/intc/ioapic.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
diff mbox

Patch

diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c
index d6e88d5..b41ab89 100644
--- a/hw/intc/ioapic.c
+++ b/hw/intc/ioapic.c
@@ -30,6 +30,7 @@ 
 #include "sysemu/kvm.h"
 #include "target-i386/cpu.h"
 #include "hw/i386/apic-msidef.h"
+#include "hw/i386/intel_iommu.h"
 
 //#define DEBUG_IOAPIC
 
@@ -197,6 +198,14 @@  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;
@@ -330,6 +339,18 @@  static void ioapic_realize(DeviceState *dev, Error **errp)
     qdev_init_gpio_in(dev, ioapic_set_irq, IOAPIC_NUM_PINS);
 
     ioapics[ioapic_no] = s;
+
+#ifdef CONFIG_KVM
+    if (kvm_irqchip_is_split()) {
+        IntelIOMMUState *iommu = vtd_iommu_get();
+        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. */
+            vtd_iec_register_notifier(iommu, ioapic_iec_notifier, s);
+        }
+    }
+#endif
 }
 
 static void ioapic_class_init(ObjectClass *klass, void *data)