[RFC][PATCH 18/45] qemu-kvm: Hook into MSI delivery at APIC level

[Jan Kiszka <jan.kiszka@xxxxxxxxxxx>]

Move the two hooks for MSI delivery to in-kernel irqchips from the MSI
layer to a single place: the APIC.

Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
---
 hw/apic.c |   24 +++++++++++++++---------
 hw/msi.c  |    5 -----
 hw/msix.c |    5 -----
 3 files changed, 15 insertions(+), 19 deletions(-)

diff --git a/hw/apic.c b/hw/apic.c
index 6811ae1..cb6662c 100644
--- a/hw/apic.c
+++ b/hw/apic.c
@@ -806,15 +806,21 @@ static uint32_t apic_mem_readl(void *opaque, target_phys_addr_t addr)
 
 void apic_deliver_msi(MSIMessage *msg, MSIRoutingCache *cache)
 {
-    uint8_t dest =
-        (msg->address & MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
-    uint8_t vector =
-        (msg->data & MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
-    uint8_t dest_mode = (msg->address >> MSI_ADDR_DEST_MODE_SHIFT) & 0x1;
-    uint8_t trigger_mode = (msg->data >> MSI_DATA_TRIGGER_SHIFT) & 0x1;
-    uint8_t delivery = (msg->data >> MSI_DATA_DELIVERY_MODE_SHIFT) & 0x7;
-    /* XXX: Ignore redirection hint. */
-    apic_deliver_irq(dest, dest_mode, delivery, vector, trigger_mode);
+    if (kvm_enabled() && kvm_irqchip_in_kernel()) {
+        if (kvm_set_irq(cache->kvm_gsi, 1, NULL) < 0) {
+            abort();
+        }
+    } else {
+        uint8_t dest =
+            (msg->address & MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
+        uint8_t vector =
+            (msg->data & MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
+        uint8_t dest_mode = (msg->address >> MSI_ADDR_DEST_MODE_SHIFT) & 0x1;
+        uint8_t trigger_mode = (msg->data >> MSI_DATA_TRIGGER_SHIFT) & 0x1;
+        uint8_t delivery = (msg->data >> MSI_DATA_DELIVERY_MODE_SHIFT) & 0x7;
+        /* XXX: Ignore redirection hint. */
+        apic_deliver_irq(dest, dest_mode, delivery, vector, trigger_mode);
+    }
 }
 
 static void apic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
diff --git a/hw/msi.c b/hw/msi.c
index b947104..1328903 100644
--- a/hw/msi.c
+++ b/hw/msi.c
@@ -355,11 +355,6 @@ void msi_notify(PCIDevice *dev, unsigned int vector)
         return;
     }
 
-    if (kvm_enabled() && kvm_irqchip_in_kernel()) {
-        kvm_set_irq(dev->msi_cache[vector].kvm_gsi, 1, NULL);
-        return;
-    }
-
     msi_message_from_vector(dev, flags, vector, &msg);
 
     MSI_DEV_PRINTF(dev,
diff --git a/hw/msix.c b/hw/msix.c
index 0be022e..6886255 100644
--- a/hw/msix.c
+++ b/hw/msix.c
@@ -457,11 +457,6 @@ void msix_notify(PCIDevice *dev, unsigned vector)
         return;
     }
 
-    if (kvm_enabled() && kvm_irqchip_in_kernel()) {
-        kvm_set_irq(dev->msix_cache[vector].kvm_gsi, 1, NULL);
-        return;
-    }
-
     msix_message_from_vector(dev, vector, &msg);
 
     msi_deliver(&msg, &dev->msix_cache[vector]);
-- 
1.7.3.4

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