diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-10-19 11:15:23 +0100 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2020-10-21 08:32:30 -0400 |
| commit | 8195400f7ea95399f721ad21f4d663a62c65036f (patch) | |
| tree | 8620d1616fb07e2da14fc1f9ba27b9decc735e71 /tools/perf/scripts/python/syscall-counts.py | |
| parent | 3da3c5c1c9825c24168f27b021339e90af37e969 (diff) | |
drm/i915: Force VT'd workarounds when running as a guest OS
If i915.ko is being used as a passthrough device, it does not know if
the host is using intel_iommu. Mixing the iommu and gfx causes a few
issues (such as scanout overfetch) which we need to workaround inside
the driver, so if we detect we are running under a hypervisor, also
assume the device access is being virtualised.
Reported-by: Stefan Fritsch <sf@sfritsch.de>
Suggested-by: Stefan Fritsch <sf@sfritsch.de>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Stefan Fritsch <sf@sfritsch.de>
Cc: stable@vger.kernel.org
Tested-by: Stefan Fritsch <sf@sfritsch.de>
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201019101523.4145-1-chris@chris-wilson.co.uk
(cherry picked from commit f566fdcd6cc49a9d5b5d782f56e3e7cb243f01b8)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions