[Qemu-devel] [RFC][PATCH 22/45] qemu-kvm: msix: Fire mask notifier on global mask changes

[Jan Kiszka]

Also invoke the mask notifier if the global MSI-X mask is modified. For
this purpose, we push the notifier call from the per-vector mask update
to the central msix_handle_mask_update.

Signed-off-by: Jan Kiszka <address@hidden>
---
 hw/msix.c |   16 +++++++++-------
 1 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/hw/msix.c b/hw/msix.c
index 739b56f..247b255 100644
--- a/hw/msix.c
+++ b/hw/msix.c
@@ -221,7 +221,15 @@ static bool msix_is_masked(PCIDevice *dev, int vector)
 
 static void msix_handle_mask_update(PCIDevice *dev, int vector)
 {
-    if (!msix_is_masked(dev, vector) && msix_is_pending(dev, vector)) {
+    bool masked = msix_is_masked(dev, vector);
+    int ret;
+
+    if (dev->msix_mask_notifier) {
+        ret = dev->msix_mask_notifier(dev, vector,
+                                      msix_is_masked(dev, vector));
+        assert(ret >= 0);
+    }
+    if (!masked && msix_is_pending(dev, vector)) {
         msix_clr_pending(dev, vector);
         msix_notify(dev, vector);
     }
@@ -262,7 +270,6 @@ static void msix_mmio_write(void *opaque, 
target_phys_addr_t addr,
     unsigned int offset = addr & (MSIX_PAGE_SIZE - 1) & ~0x3;
     unsigned int vector = offset / PCI_MSIX_ENTRY_SIZE;
     bool was_masked = msix_is_masked(dev, vector);
-    int r;
 
     pci_set_long(dev->msix_table_page + offset, val);
     if (kvm_enabled() && kvm_irqchip_in_kernel()) {
@@ -271,11 +278,6 @@ static void msix_mmio_write(void *opaque, 
target_phys_addr_t addr,
 
     if (vector < dev->msix_entries_nr &&
         was_masked != msix_is_masked(dev, vector)) {
-        if (dev->msix_mask_notifier) {
-            r = dev->msix_mask_notifier(dev, vector,
-                                        msix_is_masked(dev, vector));
-            assert(r >= 0);
-        }
         msix_handle_mask_update(dev, vector);
     }
 }
-- 
1.7.3.4