diff options
| author | Alex Williamson | 2015-04-28 19:14:02 +0200 |
|---|---|---|
| committer | Alex Williamson | 2015-04-28 19:14:02 +0200 |
| commit | 5655f931abcfa5f100d12d021eaed606c2d4ef52 (patch) | |
| tree | 17189fd58d972281f8a8636154fa536e06985501 /linux-headers | |
| parent | vfio-pci: Fix error path sign (diff) | |
| download | qemu-5655f931abcfa5f100d12d021eaed606c2d4ef52.tar.gz qemu-5655f931abcfa5f100d12d021eaed606c2d4ef52.tar.xz qemu-5655f931abcfa5f100d12d021eaed606c2d4ef52.zip | |
vfio-pci: Reset workaround for AMD Bonaire and Hawaii GPUs
Somehow these GPUs manage not to respond to a PCI bus reset, removing
our primary mechanism for resetting graphics cards. The result is
that these devices typically work well for a single VM boot. If the
VM is rebooted or restarted, the guest driver is not able to init the
card from the dirty state, resulting in a blue screen for Windows
guests.
The workaround is to use a device specific reset. This is not 100%
reliable though since it depends on the incoming state of the device,
but it substantially improves the usability of these devices in a VM.
Credit to Alex Deucher <alexander.deucher@amd.com> for his guidance.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'linux-headers')
0 files changed, 0 insertions, 0 deletions