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| author | Thomas Hellstrom (VMware) <thomas_os@shipmail.org> | 2020-03-24 18:48:33 +0100 |
|---|---|---|
| committer | Thomas Hellstrom (VMware) <thomas_os@shipmail.org> | 2020-03-24 18:48:33 +0100 |
| commit | 314b6580adc543cf21a1a84bce9c6a58a8dcb38c (patch) | |
| tree | e9110e42d9de5609f3795b406976d769f25532e1 /include/drm | |
| parent | 9a9731b18c9bb70c023f0b2c731726fd5167673e (diff) | |
| download | linux-314b6580adc543cf21a1a84bce9c6a58a8dcb38c.tar.bz2 | |
drm/ttm, drm/vmwgfx: Support huge TTM pagefaults
Support huge (PMD-size and PUD-size) page-table entries by providing a
huge_fault() callback.
We still support private mappings and write-notify by splitting the huge
page-table entries on write-access.
Note that for huge page-faults to occur, either the kernel needs to be
compiled with trans-huge-pages always enabled, or the kernel needs to be
compiled with trans-huge-pages enabled using madvise, and the user-space
app needs to call madvise() to enable trans-huge pages on a per-mapping
basis.
Furthermore huge page-faults will not succeed unless buffer objects and
user-space addresses are aligned on huge page size boundaries.
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Thomas Hellstrom (VMware) <thomas_os@shipmail.org>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/ttm/ttm_bo_api.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h index b9bc1b00142e..0a9d042e075a 100644 --- a/include/drm/ttm/ttm_bo_api.h +++ b/include/drm/ttm/ttm_bo_api.h @@ -727,7 +727,8 @@ vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo, vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf, pgprot_t prot, - pgoff_t num_prefault); + pgoff_t num_prefault, + pgoff_t fault_page_size); vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf); |