Quoting Arkadiusz Hiler (2019-10-31 12:40:35) > On Wed, Oct 30, 2019 at 10:22:37PM +0000, Matthew Auld wrote: > > On Tue, 29 Oct 2019 at 16:51, Matthew Auld <matthew.auld@xxxxxxxxx> wrote: > > > > > > Intended for upstream testing so that we can still exercise the LMEM > > > plumbing and !i915_ggtt_has_aperture paths. Smoke tested on Skull Canyon > > > device. This works by allocating an intel_memory_region for a reserved > > > portion of system memory, which we treat like LMEM. For the LMEMBAR we > > > steal the aperture and 1:1 it map to the stolen region. > > > > > > To enable simply set the i915 modparam fake_lmem_start= on the kernel > > > cmdline with the start of reserved region(see memmap=). The size of the > > > region we can use is determined by the size of the mappable aperture, so > > > the size of reserved region should be >= mappable_end. For now we only > > > enable for the selftests. Depends on CONFIG_DRM_I915_UNSTABLE being > > > enabled. > > > > > > eg. memmap=2G$16G i915.fake_lmem_start=0x400000000 > > > > Hi Arek, > > > > Would you be able to update the fi-skl-lmem kernel cmd line with > > s/i915_fake_lmem_start/i915.fake_lmem_start? > > done <6>[ 497.897456] [drm] Intel graphics fake LMEM: [mem 0x100000000-0x13fffffff] <6>[ 497.897459] [drm] Intel graphics fake LMEM IO start: 40000000 <6>[ 497.897461] [drm] Intel graphics fake LMEM size: 40000000 All present. -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
