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drm/amdgpu: flush TLB if valid PDE turns into PTE

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Mapping huge page, 2MB aligned address with 2MB size, uses PDE0 as PTE.
If previously valid PDE0, PDE0.V=1 and PDE0.P=0 turns into PTE, this
requires TLB flush, otherwise page table walker will not read updated
PDE0.

Change page table update mapping to return table_freed flag to indicate
the previously valid PDE may have turned into a PTE if page table is
freed.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Philip Yang
2021-05-12 08:02:46 -04:00
committed by Alex Deucher
parent a6ce1e1aab
commit bf546940d5
3 changed files with 27 additions and 7 deletions
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7
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
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@@ -231,6 +231,11 @@ struct amdgpu_vm_update_params {
* @num_dw_left: number of dw left for the IB
*/
unsigned int num_dw_left;
/**
* @table_freed: return true if page table is freed when updating
*/
bool table_freed;
};
struct amdgpu_vm_update_funcs {
@@ -404,7 +409,7 @@ int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
uint64_t flags, uint64_t offset,
struct ttm_resource *res,
dma_addr_t *pages_addr,
struct dma_fence **fence);
struct dma_fence **fence, bool *free_table);
int amdgpu_vm_bo_update(struct amdgpu_device *adev,
struct amdgpu_bo_va *bo_va,
bool clear);