diff options
| author | Philip Yang <Philip.Yang@amd.com> | 2026-01-27 21:52:33 +0300 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2026-03-04 15:21:35 +0300 |
| commit | e4591b9d13c23cd7cc8704acd4dc7fe992862087 (patch) | |
| tree | 98605a4ce0e734e7674e70407037535d0c989415 /drivers/gpu | |
| parent | 40cd2f41a8ceb8b18de587d354dd806961cd922d (diff) | |
| download | linux-e4591b9d13c23cd7cc8704acd4dc7fe992862087.tar.xz | |
drm/amdgpu: Use 5-level paging if gmc support 57-bit VA
[ Upstream commit 3b948dd0366a0b64c02e4ed1aefdf7825942e803 ]
Regardless if CPU enable 5-level paging, GPU vm use 5-level paging if
gmc init with 57-bit address space support, because
ARM64 4-level paging support 48-bit VA, x86 and GPU 4-level paging
support 47-bit VA, require 5-level paging on GPU to support ARM64.
NPA address space 52-bit mapping on NPA GPU VM require 5-level paging.
Debugger trap get device snapshot expect LDS and Scratch base, limit
above 57-bit, which is set only for 5-level paging.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.19.x
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 4d329454456b..bd7f83efed18 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -2360,26 +2360,9 @@ void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size, unsigned max_bits) { unsigned int max_size = 1 << (max_bits - 30); - bool sys_5level_pgtable = false; unsigned int vm_size; uint64_t tmp; -#ifdef CONFIG_X86_64 - /* - * Refer to function configure_5level_paging() for details. - */ - sys_5level_pgtable = (native_read_cr4() & X86_CR4_LA57); -#endif - - /* - * If GPU supports 5-level page table, but system uses 4-level page table, - * then use 4-level page table on GPU - */ - if (max_level == 4 && !sys_5level_pgtable) { - min_vm_size = 256 * 1024; - max_level = 3; - } - /* adjust vm size first */ if (amdgpu_vm_size != -1) { vm_size = amdgpu_vm_size; |