iommu/tegra: smmu: debugfs for TLB/PTC statistics
Add debugfs entries to collect TLB/PTC statistics.
$ echo "reset" > /sys/kernel/debug/smmu/mc/{tlb,ptc}
$ echo "on" > /sys/kernel/debug/smmu/mc/{tlb,ptc}
$ echo "off" > /sys/kernel/debug/smmu/mc/{tlb,ptc}
$ cat /sys/kernel/debug/smmu/mc/{tlb,ptc}
hit:0014910c miss:00014d22
The above format is:
hit:<HIT count><SPC>miss:<MISS count><SPC><CR+LF>
fscanf(fp, "hit:%lx miss:%lx", &hit, &miss);
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
1 file changed
