summaryrefslogtreecommitdiffstats
path: root/drivers/iommu
diff options
context:
space:
mode:
authorLu Baolu <baolu.lu@linux.intel.com>2021-01-14 17:04:00 +0800
committerJoerg Roedel <jroedel@suse.de>2021-01-28 11:32:13 +0100
commitf2dd871799ba5d80f95f9bdbc0e60d390e1bcd22 (patch)
treef910ca52ab2770dba8f30937f258f398a86a7241 /drivers/iommu
parent9872f9bd9dbd68f75e8db782717d71e8594f6a02 (diff)
downloadlinux-stable-f2dd871799ba5d80f95f9bdbc0e60d390e1bcd22.tar.gz
linux-stable-f2dd871799ba5d80f95f9bdbc0e60d390e1bcd22.tar.bz2
linux-stable-f2dd871799ba5d80f95f9bdbc0e60d390e1bcd22.zip
iommu/vt-d: Add qi_submit trace event
This adds a new trace event to track the submissions of requests to the invalidation queue. This event will provide the information like: - IOMMU name - Invalidation type - Descriptor raw data A sample output like: | qi_submit: iotlb_inv dmar1: 0x100e2 0x0 0x0 0x0 | qi_submit: dev_tlb_inv dmar1: 0x1000000003 0x7ffffffffffff001 0x0 0x0 | qi_submit: iotlb_inv dmar2: 0x800f2 0xf9a00005 0x0 0x0 This will be helpful for queued invalidation related debugging. Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20210114090400.736104-1-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/intel/dmar.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
index 004feaed3c72..bd51f33642e0 100644
--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -31,6 +31,7 @@
#include <linux/limits.h>
#include <asm/irq_remapping.h>
#include <asm/iommu_table.h>
+#include <trace/events/intel_iommu.h>
#include "../irq_remapping.h"
@@ -1307,6 +1308,8 @@ restart:
offset = ((index + i) % QI_LENGTH) << shift;
memcpy(qi->desc + offset, &desc[i], 1 << shift);
qi->desc_status[(index + i) % QI_LENGTH] = QI_IN_USE;
+ trace_qi_submit(iommu, desc[i].qw0, desc[i].qw1,
+ desc[i].qw2, desc[i].qw3);
}
qi->desc_status[wait_index] = QI_IN_USE;