mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 20:24:29 +07:00
1629224324
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 v2: make fake_lmem_start an i915 modparam Signed-off-by: Matthew Auld <matthew.auld@intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Abdiel Janulgue <abdiel.janulgue@linux.intel.com> Cc: Arkadiusz Hiler <arkadiusz.hiler@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20191030173320.8850-1-matthew.auld@intel.com
30 lines
1.0 KiB
Plaintext
30 lines
1.0 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
|
|
config DRM_I915_UNSTABLE
|
|
bool "Enable unstable API for early prototype development"
|
|
depends on EXPERT
|
|
depends on STAGING
|
|
depends on BROKEN # should never be enabled by distros!
|
|
# We use the dependency on !COMPILE_TEST to not be enabled in
|
|
# allmodconfig or allyesconfig configurations
|
|
depends on !COMPILE_TEST
|
|
default n
|
|
help
|
|
Enable prototype uAPI under general discussion before they are
|
|
finalized. Such prototypes may be withdrawn or substantially
|
|
changed before release. They are only enabled here so that a wide
|
|
number of interested parties (userspace driver developers) can
|
|
verify that the uAPI meet their expectations. These uAPI should
|
|
never be used in production.
|
|
|
|
Recommended for driver developers _only_.
|
|
|
|
If in the slightest bit of doubt, say "N".
|
|
|
|
config DRM_I915_UNSTABLE_FAKE_LMEM
|
|
bool "Enable the experimental fake lmem"
|
|
depends on DRM_I915_UNSTABLE
|
|
default n
|
|
help
|
|
Convert some system memory into a fake local memory region for
|
|
testing.
|