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| author | Ben Skeggs <bskeggs@redhat.com> | 2017-10-31 20:56:19 +0300 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2017-11-02 06:32:27 +0300 |
| commit | eb813999f20097d24310836dfa07a97e2eb0c936 (patch) | |
| tree | 1e5290cf803d532451e346e833a827a2690e88a5 /drivers/gpu/drm/nouveau/Kconfig | |
| parent | bda9e379f61f937af7ee9b2a32d54bc50a94cd80 (diff) | |
| download | linux-eb813999f20097d24310836dfa07a97e2eb0c936.tar.xz | |
drm/nouveau/mmu: implement new vmm backend
This is the common code to support a rework of the VMM backends.
It adds support for more than 2 levels of page table nesting, which
is required to be able to support GP100's MMU layout.
Sparse mappings (that don't cause MMU faults when accessed) are now
supported, where the backend provides it.
Dual-PT handling had to become more sophisticated to support sparse,
but this also allows us to support an optimisation the MMU provides
on GK104 and newer.
Certain operations can now be combined into a single page tree walk
to avoid some overhead, but also enables optimsations like skipping
PTE unmap writes when the PT will be destroyed anyway.
The old backend has been hacked up to forward requests onto the new
backend, if present, so that it's possible to bisect between issues
in the backend changes vs the upcoming frontend changes.
Until the new frontend has been merged, new backends will leak BAR2
page tables on module unload. This is expected, and it's not worth
the effort of hacking around this as it doesn't effect runtime.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/Kconfig')
| -rw-r--r-- | drivers/gpu/drm/nouveau/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig index c02a13406a81..4b75ad40dd80 100644 --- a/drivers/gpu/drm/nouveau/Kconfig +++ b/drivers/gpu/drm/nouveau/Kconfig @@ -56,6 +56,13 @@ config NOUVEAU_DEBUG_DEFAULT help Selects the default debug level +config NOUVEAU_DEBUG_MMU + bool "Enable additional MMU debugging" + depends on DRM_NOUVEAU + default n + help + Say Y here if you want to enable verbose MMU debug output. + config DRM_NOUVEAU_BACKLIGHT bool "Support for backlight control" depends on DRM_NOUVEAU |