* [PATCH] iommu/amd - Record more information about unknown events
@ 2017-12-04 19:52 Gary R Hook
2017-12-20 19:02 ` Alex Williamson
0 siblings, 1 reply; 2+ messages in thread
From: Gary R Hook @ 2017-12-04 19:52 UTC (permalink / raw)
To: iommu; +Cc: joro, linux-kernel
When an unknown type event occurs, the default information written to
the syslog should dump raw event data. This could provide insight into
the event that occurred.
Signed-off-by: Gary R Hook <gary.hook@amd.com>
---
drivers/iommu/amd_iommu.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 51f8215877f5..cb78933ef53f 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -617,7 +617,9 @@ static void iommu_print_event(struct amd_iommu *iommu, void *__evt)
address, flags);
break;
default:
- printk(KERN_ERR "UNKNOWN type=0x%02x]\n", type);
+ printk(KERN_ERR "UNKNOWN type=0x%02x event[0]=0x%08x "
+ "event[1]=0x%08x event[2]=0x%08x event[3]=0x%08x\n",
+ type, event[0], event[1], event[2], event[3]);
}
memset(__evt, 0, 4 * sizeof(u32));
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