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ac/gpu_info: don't allow register shadowing with SR-IOV due to bad performance

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This is only for gfx11.

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25484>
This commit is contained in:
Marek Olšák 2023-09-29 20:35:14 -04:00 • committed by Marge Bot
parent 6e20f820c6
commit 865cab6a1c
1 changed files with 3 additions and 1 deletions
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4
src/amd/common/ac_gpu_info.c
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@ -1016,7 +1016,9 @@ bool ac_query_gpu_info(int fd, void *dev_p, struct radeon_info *info,
info->has_sparse_vm_mappings = info->gfx_level >= GFX7;
info->has_scheduled_fence_dependency = info->drm_minor >= 28;
info->has_gang_submit = info->drm_minor >= 49;
info->register_shadowing_required = device_info.ids_flags & AMDGPU_IDS_FLAGS_PREEMPTION;
/* WARNING: Register shadowing decreases performance by up to 50% on GFX11 with current FW. */
info->register_shadowing_required = device_info.ids_flags & AMDGPU_IDS_FLAGS_PREEMPTION &&
info->gfx_level < GFX11;
info->has_tmz_support = has_tmz_support(dev, info, device_info.ids_flags);
info->kernel_has_modifiers = has_modifiers(fd);
info->uses_kernel_cu_mask = false; /* Not implemented in the kernel. */