reserve gsi 0 to 23 so that they won't be allocated for msi
Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
---
diff --git a/qemu-kvm.c b/qemu-kvm.c
index c6c9fc6..f440b2d 100644
--- a/qemu-kvm.c
+++ b/qemu-kvm.c
@@ -1613,10 +1613,12 @@ int kvm_get_irq_route_gsi(kvm_context_t kvm)
{
int i, bit;
uint32_t *buf = kvm->used_gsi_bitmap;
+ uint32_t mask = 0xff000000;
/* Return the lowest unused GSI in the bitmap */
- for (i = 0; i < kvm->max_gsi / 32; i++) {
- bit = ffs(~buf[i]);
+ for (i = 0; i < kvm->max_gsi / 32; i++) {
+ bit = ffs(~buf[i] & mask);
+ mask = 0xffffffff;
if (!bit)
continue;
--
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