From: Mukul Joshi <mukul.joshi@amd.com>
Date: Wed, 10 Sep 2025 20:57:25 +0000 (-0400)
Subject: drm/amdgpu: add PCIe atomics bit in PTE
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2718942f48d41c4dc1c19a7a20720633191afd2f;p=thirdparty%2Fkernel%2Flinux.git

drm/amdgpu: add PCIe atomics bit in PTE

To enable atomic access to memory, setup the new PCIe atomics bit
in PTE.

Signed-off-by: Mukul Joshi <mukul.joshi@amd.com>
Reviewed-by: Alex Sierra <alex.sierra@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index 15d757c016cbb..d83c2a95ebea3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -129,6 +129,7 @@ struct amdgpu_bo_vm;
 	  AMDGPU_PTE_MTYPE_GFX12_SHIFT(mtype))
 
 #define AMDGPU_PTE_DCC			(1ULL << 58)
+#define AMDGPU_PTE_BUS_ATOMICS		(1ULL << 59)
 #define AMDGPU_PTE_IS_PTE		(1ULL << 63)
 
 /* PDE Block Fragment Size for gfx v12 */