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AMD IOMMU: add stats counter for single iommu domain tlb flushes

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Impact: see number of single iommu domain tlb flushes in debugfs

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-12-12 15:46:29 +01:00
parent c1858976f5
commit f57d98ae69
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kernel/amd_iommu.c
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@ -72,6 +72,7 @@ DECLARE_STATS_COUNTER(cnt_unmap_sg);
DECLARE_STATS_COUNTER(cnt_alloc_coherent); DECLARE_STATS_COUNTER(cnt_alloc_coherent);
DECLARE_STATS_COUNTER(cnt_free_coherent); DECLARE_STATS_COUNTER(cnt_free_coherent);
DECLARE_STATS_COUNTER(cross_page); DECLARE_STATS_COUNTER(cross_page);
DECLARE_STATS_COUNTER(domain_flush_single);
static struct dentry *stats_dir; static struct dentry *stats_dir;
static struct dentry *de_isolate; static struct dentry *de_isolate;
@ -106,6 +107,7 @@ static void amd_iommu_stats_init(void)
amd_iommu_stats_add(&cnt_alloc_coherent); amd_iommu_stats_add(&cnt_alloc_coherent);
amd_iommu_stats_add(&cnt_free_coherent); amd_iommu_stats_add(&cnt_free_coherent);
amd_iommu_stats_add(&cross_page); amd_iommu_stats_add(&cross_page);
amd_iommu_stats_add(&domain_flush_single);
} }
#endif #endif
@ -413,6 +415,8 @@ static void iommu_flush_tlb(struct amd_iommu *iommu, u16 domid)
{ {
u64 address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS; u64 address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS;
INC_STATS_COUNTER(domain_flush_single);
iommu_queue_inv_iommu_pages(iommu, address, domid, 0, 1); iommu_queue_inv_iommu_pages(iommu, address, domid, 0, 1);
} }