linux-kernel - [PATCH v2 2/2] drm/amdgpu: add vm fault information to devcoredump

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Date: Fri,  8 Mar 2024 02:20:54 +0530
From: Sunil Khatri <sunil.khatri@....com>
To: Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        Shashank Sharma <shashank.sharma@....com>
Cc: amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Mukul Joshi <mukul.joshi@....com>,
        Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@....com>,
        Sunil Khatri <sunil.khatri@....com>
Subject: [PATCH v2 2/2] drm/amdgpu: add vm fault information to devcoredump

Add page fault information to the devcoredump.

Output of devcoredump:
**** AMDGPU Device Coredump ****
version: 1
kernel: 6.7.0-amd-staging-drm-next
module: amdgpu
time: 29.725011811
process_name: soft_recovery_p PID: 1720

Ring timed out details
IP Type: 0 Ring Name: gfx_0.0.0

[gfxhub] Page fault observed
Faulty page starting at address: 0x0000000000000000
Protection fault status register: 0x301031

VRAM is lost due to GPU reset!

Signed-off-by: Sunil Khatri <sunil.khatri@....com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
index 147100c27c2d..8794a3c21176 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
@@ -203,8 +203,20 @@ amdgpu_devcoredump_read(char *buffer, loff_t offset, size_t count,
 			   coredump->ring->name);
 	}
 
+	if (coredump->adev) {
+		struct amdgpu_vm_fault_info *fault_info =
+			&coredump->adev->vm_manager.fault_info;
+
+		drm_printf(&p, "\n[%s] Page fault observed\n",
+			   fault_info->vmhub ? "mmhub" : "gfxhub");
+		drm_printf(&p, "Faulty page starting at address: 0x%016llx\n",
+			   fault_info->addr);
+		drm_printf(&p, "Protection fault status register: 0x%x\n",
+			   fault_info->status);
+	}
+
 	if (coredump->reset_vram_lost)
-		drm_printf(&p, "VRAM is lost due to GPU reset!\n");
+		drm_printf(&p, "\nVRAM is lost due to GPU reset!\n");
 	if (coredump->adev->reset_info.num_regs) {
 		drm_printf(&p, "AMDGPU register dumps:\nOffset:     Value:\n");
 
-- 
2.34.1