diff options
| author | Andrzej Hajda <andrzej.hajda@intel.com> | 2022-11-14 11:38:24 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-12-02 17:41:12 +0100 |
| commit | ee2d04f23bbb16208045c3de545c6127aaa1ed0e (patch) | |
| tree | f7f6768d5e8f5e3333010c8d01da6400a0d3f8a4 | |
| parent | bef834845d89ef217973d063a071169abb2010cc (diff) | |
drm/i915: fix TLB invalidation for Gen12 video and compute engines
commit 04aa64375f48a5d430b5550d9271f8428883e550 upstream.
In case of Gen12 video and compute engines, TLB_INV registers are masked -
to modify one bit, corresponding bit in upper half of the register must
be enabled, otherwise nothing happens.
CVE: CVE-2022-4139
Suggested-by: Chris Wilson <chris.p.wilson@intel.com>
Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Fixes: 7938d61591d3 ("drm/i915: Flush TLBs before releasing backing store")
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_gt.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index ed8ad3b26395..a09820ada82c 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -982,6 +982,10 @@ void intel_gt_invalidate_tlbs(struct intel_gt *gt) if (!i915_mmio_reg_offset(rb.reg)) continue; + if (GRAPHICS_VER(i915) == 12 && (engine->class == VIDEO_DECODE_CLASS || + engine->class == VIDEO_ENHANCEMENT_CLASS)) + rb.bit = _MASKED_BIT_ENABLE(rb.bit); + intel_uncore_write_fw(uncore, rb.reg, rb.bit); } |