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vfio: allow to disable MMAP per device with -x-mmap=off option

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Disabling MMAP support uses the slower read/write accesses but allows to
trace all MMIO accesses, which is not good for performance, but very
useful for reverse engineering PCI drivers. This option allows to
disable MMAP per device without a compile-time change.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Samuel Pitoiset 2015-03-02 11:38:55 -07:00 • committed by Alex Williamson
parent 51b833f440
commit 6ee47c9008
3 changed files with 3 additions and 2 deletions
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2
hw/vfio/common.c
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@ -493,7 +493,7 @@ int vfio_mmap_region(Object *obj, VFIORegion *region,
int ret = 0;
VFIODevice *vbasedev = region->vbasedev;
if (VFIO_ALLOW_MMAP && size && region->flags &
if (vbasedev->allow_mmap && size && region->flags &
VFIO_REGION_INFO_FLAG_MMAP) {
int prot = 0;