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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-10-19 19:50:05 +0300 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2020-10-21 15:32:28 +0300 |
| commit | 3da3c5c1c9825c24168f27b021339e90af37e969 (patch) | |
| tree | 91b0c84294244df6eb53b434507da8400a3b1711 /drivers/gpu/drm/i915/Kconfig.debug | |
| parent | b8cff311a42df4f15d6432583573d828b5c7b12a (diff) | |
| download | linux-3da3c5c1c9825c24168f27b021339e90af37e969.tar.xz | |
drm/i915: Exclude low pages (128KiB) of stolen from use
The GPU is trashing the low pages of its reserved memory upon reset. If
we are using this memory for ringbuffers, then we will dutiful resubmit
the trashed rings after the reset causing further resets, and worse. We
must exclude this range from our own use. The value of 128KiB was found
by empirical measurement (and verified now with a selftest) on gen9.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201019165005.18128-2-chris@chris-wilson.co.uk
(cherry picked from commit d3606757e611fbd48bb239e8c2fe9779b3f50035)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/Kconfig.debug')
| -rw-r--r-- | drivers/gpu/drm/i915/Kconfig.debug | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/Kconfig.debug b/drivers/gpu/drm/i915/Kconfig.debug index 1cb28c20807c..25cd9788a4d5 100644 --- a/drivers/gpu/drm/i915/Kconfig.debug +++ b/drivers/gpu/drm/i915/Kconfig.debug @@ -153,6 +153,7 @@ config DRM_I915_SELFTEST select DRM_EXPORT_FOR_TESTS if m select FAULT_INJECTION select PRIME_NUMBERS + select CRC32 help Choose this option to allow the driver to perform selftests upon loading; also requires the i915.selftest=1 module parameter. To |