[v3,kvmtool,23/32] vfio: Reserve ioports when configuring the BAR

Commit Message

Alexandru Elisei March 26, 2020, 3:24 p.m. UTC

Let's be consistent and reserve ioports when we are configuring the BAR,
not when we map it, just like we do with mmio regions.

Reviewed-by: Andre Przywara <[e-mail]>
Signed-off-by: Alexandru Elisei <[e-mail]>
---
 vfio/core.c | 9 +++------
 vfio/pci.c  | 4 +++-
 2 files changed, 6 insertions(+), 7 deletions(-)

Patch

diff --git a/vfio/core.c b/vfio/core.c
index b80ebf3bb913..bad3c7c8cd26 100644
--- a/vfio/core.c
+++ b/vfio/core.c
@@ -202,14 +202,11 @@  static int vfio_setup_trap_region(struct kvm *kvm, struct vfio_device *vdev,
 				  struct vfio_region *region)
 {
 	if (region->is_ioport) {
-		int port = pci_get_io_port_block(region->info.size);
-
-		port = ioport__register(kvm, port, &vfio_ioport_ops,
-					region->info.size, region);
+		int port = ioport__register(kvm, region->port_base,
+					   &vfio_ioport_ops, region->info.size,
+					   region);
 		if (port < 0)
 			return port;
-
-		region->port_base = port;
 		return 0;
 	}
 
diff --git a/vfio/pci.c b/vfio/pci.c
index 4412c6d7a862..fe02574390f6 100644
--- a/vfio/pci.c
+++ b/vfio/pci.c
@@ -886,7 +886,9 @@  static int vfio_pci_configure_bar(struct kvm *kvm, struct vfio_device *vdev,
 		}
 	}
 
-	if (!region->is_ioport) {
+	if (region->is_ioport) {
+		region->port_base = pci_get_io_port_block(region->info.size);
+	} else {
 		/* Grab some MMIO space in the guest */
 		map_size = ALIGN(region->info.size, PAGE_SIZE);
 		region->guest_phys_addr = pci_get_mmio_block(map_size);