The current kvm_init_irq_routing() doesn't set up the used_gsi_bitmap
correctly, and as a consequence pins max_gsi to 32 when it really
should be 1024. I ran into this limitation while testing pci
passthrough, where I consistently got an -ENOSPC return from
kvm_get_irq_route_gsi() called from assigned_dev_update_msix_mmio().
Signed-off-by: Jason Baron <jba...@redhat.com>
---
kvm-all.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index ab88c7c..b616c7d 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -873,7 +873,7 @@ static void kvm_init_irq_routing(KVMState *s)
unsigned int gsi_bits, i;
/* Round up so we can search ints using ffs */
- gsi_bits = (gsi_count + 31) / 32;
+ gsi_bits = ALIGN(gsi_count, 32);
s->used_gsi_bitmap = g_malloc0(gsi_bits / 8);
s->max_gsi = gsi_bits;
--
1.7.1
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