linux-kernel - [PATCH 16/22] iommu/amd: Add stat counter for IOMMUv2 events

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 5 Dec 2011 14:34:31 +0100
From:	Joerg Roedel <joerg.roedel@....com>
To:	<iommu@...ts.linux-foundation.org>
CC:	<linux-kernel@...r.kernel.org>, Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 16/22] iommu/amd: Add stat counter for IOMMUv2 events

Add some interesting statistic counters for events when
IOMMUv2 is active.

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 drivers/iommu/amd_iommu.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 7bd1565..88b16c0 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -359,6 +359,11 @@ DECLARE_STATS_COUNTER(domain_flush_single);
 DECLARE_STATS_COUNTER(domain_flush_all);
 DECLARE_STATS_COUNTER(alloced_io_mem);
 DECLARE_STATS_COUNTER(total_map_requests);
+DECLARE_STATS_COUNTER(complete_ppr);
+DECLARE_STATS_COUNTER(invalidate_iotlb);
+DECLARE_STATS_COUNTER(invalidate_iotlb_all);
+DECLARE_STATS_COUNTER(pri_requests);
+
 
 static struct dentry *stats_dir;
 static struct dentry *de_fflush;
@@ -393,6 +398,10 @@ static void amd_iommu_stats_init(void)
 	amd_iommu_stats_add(&domain_flush_all);
 	amd_iommu_stats_add(&alloced_io_mem);
 	amd_iommu_stats_add(&total_map_requests);
+	amd_iommu_stats_add(&complete_ppr);
+	amd_iommu_stats_add(&invalidate_iotlb);
+	amd_iommu_stats_add(&invalidate_iotlb_all);
+	amd_iommu_stats_add(&pri_requests);
 }
 
 #endif
@@ -509,6 +518,8 @@ static void iommu_handle_ppr_entry(struct amd_iommu *iommu, u32 head)
 	volatile u64 *raw;
 	int i;
 
+	INC_STATS_COUNTER(pri_requests);
+
 	raw = (u64 *)(iommu->ppr_log + head);
 
 	/*
@@ -3356,6 +3367,8 @@ out:
 static int __amd_iommu_flush_page(struct protection_domain *domain, int pasid,
 				  u64 address)
 {
+	INC_STATS_COUNTER(invalidate_iotlb);
+
 	return __flush_pasid(domain, pasid, address, false);
 }
 
@@ -3376,6 +3389,8 @@ EXPORT_SYMBOL(amd_iommu_flush_page);
 
 static int __amd_iommu_flush_tlb(struct protection_domain *domain, int pasid)
 {
+	INC_STATS_COUNTER(invalidate_iotlb_all);
+
 	return __flush_pasid(domain, pasid, CMD_INV_IOMMU_ALL_PAGES_ADDRESS,
 			     true);
 }
@@ -3495,6 +3510,8 @@ int amd_iommu_complete_ppr(struct pci_dev *pdev, int pasid,
 	struct amd_iommu *iommu;
 	struct iommu_cmd cmd;
 
+	INC_STATS_COUNTER(complete_ppr);
+
 	dev_data = get_dev_data(&pdev->dev);
 	iommu    = amd_iommu_rlookup_table[dev_data->devid];
 
-- 
1.7.5.4


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/