[PATCH v3] drm/amdgpu: add vm fault information to devcoredump

[Sunil Khatri]

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 at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
index 147100c27c2d..6d059f853adc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
@@ -203,6 +203,18 @@ 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\n",
+			   fault_info->status);
+	}
+
 	if (coredump->reset_vram_lost)
 		drm_printf(&p, "VRAM is lost due to GPU reset!\n");
 	if (coredump->adev->reset_info.num_regs) {
-- 
2.34.1