[PATCH 21/34] drm/amdkfd: invalidate tables on page retry fault

GPU page tables are invalidated by unmapping prange directly at the mmu notifier, when page fault retry is enabled through amdgpu_noretry global parameter. The restore page table is performed at the page fault handler. If xnack is on, we update GPU mappings after migration to avoid unnecessary GPU

[PATCH 21/34] drm/amdkfd: invalidate tables on page retry fault

GPU page tables are invalidated by unmapping prange directly at the mmu notifier, when page fault retry is enabled through amdgpu_noretry global parameter. The restore page table is performed at the page fault handler. If xnack is on, we update GPU mappings after migration to avoid unnecessary GPU