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kvm: set gsi_bits and max_gsi correctly

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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 <jbaron@redhat.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Jason Baron 2012-03-28 14:18:05 -04:00 • committed by Marcelo Tosatti
parent c73b00973b
commit bc8c6788b6
1 changed files with 1 additions and 1 deletions
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2
kvm-all.c
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@ -871,7 +871,7 @@ static void kvm_init_irq_routing(KVMState *s)
unsigned int gsi_bits, i; unsigned int gsi_bits, i;
/* Round up so we can search ints using ffs */ /* 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->used_gsi_bitmap = g_malloc0(gsi_bits / 8);
s->max_gsi = gsi_bits; s->max_gsi = gsi_bits;