From 895797d9193b38e759bc01268a8e3887e521f682 Mon Sep 17 00:00:00 2001 From: Graham Sider Date: Mon, 6 Feb 2023 14:04:42 -0500 Subject: drm/amdgpu/bu: Add use_mtype_cc_wa module param By default, set use_mtype_cc_wa to 1 to set PTE coherence flag MTYPE_CC instead of MTYPE_RW by default. This is required for the time being to mitigate a bug causing XCCs to hit stale data due to TCC marking fully dirty lines as exclusive. Signed-off-by: Graham Sider Reviewed-by: Joseph Greathouse Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index da4e50aef95a..8bc37826a99f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -822,6 +822,13 @@ MODULE_PARM_DESC(no_queue_eviction_on_vm_fault, "No queue eviction on VM fault ( module_param_named(no_queue_eviction_on_vm_fault, amdgpu_no_queue_eviction_on_vm_fault, int, 0444); #endif +/** + * DOC: use_mtype_cc_wa (bool) + */ +bool amdgpu_use_mtype_cc_wa = true; +MODULE_PARM_DESC(use_mtype_cc_wa, "Use MTYPE_CC workaround (0 = use MTYPE_RW where applicable, 1 = use MTYPE_CC where applicable (default))"); +module_param_named(use_mtype_cc_wa, amdgpu_use_mtype_cc_wa, bool, 0444); + /** * DOC: pcie_p2p (bool) * Enable PCIe P2P (requires large-BAR). Default value: true (on) -- cgit v1.2.3-70-g09d2