untrusted comment: verify with openbsd-72-base.pub
RWQTKNnK3CZZ8PYAFJuzpHnmKoR8Y+HmK0LK9Szd+EHxT5DcpcYibOotzMETJn4FWMrIBP8jruk+qf2m9++QeFBRmzZfRX3AoAg=

OpenBSD 7.2 errata 011, December 14, 2022:

TLB entries were not invalidated for all types of engine on
12th generation Intel graphics (Tiger Lake, Rocket Lake, Alder Lake).

Apply by doing:
   signify -Vep /etc/signify/openbsd-72-base.pub -x 011_gpuinv.patch.sig \
       -m - | (cd /usr/src && patch -p0)

And then rebuild and install a new kernel:
   KK=`sysctl -n kern.osversion | cut -d# -f1`
   cd /usr/src/sys/arch/`machine`/compile/$KK
   make obj
   make config
   make
   make install

Index: sys/dev/pci/drm/i915/gt/intel_gt.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/drm/i915/gt/intel_gt.c,v
diff -u -p -r1.7 intel_gt.c
--- sys/dev/pci/drm/i915/gt/intel_gt.c  5 Sep 2022 14:06:39 -0000       1.7
+++ sys/dev/pci/drm/i915/gt/intel_gt.c  11 Dec 2022 07:20:30 -0000
@@ -986,6 +986,10 @@ void intel_gt_invalidate_tlbs(struct int
               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);
       }