diff mbox series

[v3,kvmtool,11/32] vfio/pci: Don't assume that only even numbered BARs are 64bit

Message ID 20200326152438.6218-12-alexandru.elisei@arm.com (mailing list archive)
State New, archived
Headers show
Series Add reassignable BARs and PCIE 1.1 support | expand

Commit Message

Alexandru Elisei March 26, 2020, 3:24 p.m. UTC 
Not all devices have the bottom 32 bits of a 64 bit BAR in an even
numbered BAR. For example, on an NVIDIA Quadro P400, BARs 1 and 3 are
64bit. Remove this assumption.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
---
 vfio/pci.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/vfio/pci.c b/vfio/pci.c
index bbb8469c8d93..1bdc20038411 100644
--- a/vfio/pci.c
+++ b/vfio/pci.c
@@ -920,8 +920,10 @@  static int vfio_pci_configure_dev_regions(struct kvm *kvm,
 
 	for (i = VFIO_PCI_BAR0_REGION_INDEX; i <= VFIO_PCI_BAR5_REGION_INDEX; ++i) {
 		/* Ignore top half of 64-bit BAR */
-		if (i % 2 && is_64bit)
+		if (is_64bit) {
+			is_64bit = false;
 			continue;
+		}
 
 		ret = vfio_pci_configure_bar(kvm, vdev, i);
 		if (ret)