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Commit af406d59 authored by Prakash Gupta's avatar Prakash Gupta Committed by Liam Mark
Browse files

iommu: arm-smmu: add tlbi traces 



Add traces for tlbi start, tlbi end and tlbsync timeout.

To enable the TLBI ftrace:
echo 1 > /d/tracing/events/iommu/tlbi_start/enable
echo 1 > /d/tracing/events/iommu/tlbi_end/enable
echo 1 > /d/tracing/events/iommu/tlbsync_timeout/enable

Change-Id: I72541e4de02ba195b31d84759efe6e07f522b5b0
Signed-off-by: default avatarPrakash Gupta <guptap@codeaurora.org>
Signed-off-by: default avatarLiam Mark <lmark@codeaurora.org>
parent b8a81fe0

drivers/iommu/arm-smmu.c

+6 −0
Original line number Diff line number Diff line
@@ -988,6 +988,7 @@ static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu, 
		}

		udelay(delay);

	}

	trace_tlbsync_timeout(smmu->dev, 0);

	dev_err_ratelimited(smmu->dev,

			    "TLB sync timed out -- SMMU may be deadlocked\n");

}
@@ -1026,10 +1027,14 @@ static void arm_smmu_tlb_sync_vmid(void *cookie) 
static void arm_smmu_tlb_inv_context_s1(void *cookie)

{

	struct arm_smmu_domain *smmu_domain = cookie;

	struct device *dev = smmu_domain->dev;

	struct arm_smmu_cfg *cfg = &smmu_domain->cfg;

	struct arm_smmu_device *smmu = smmu_domain->smmu;

	void __iomem *base = ARM_SMMU_CB(smmu_domain->smmu, cfg->cbndx);

	bool use_tlbiall = smmu->options & ARM_SMMU_OPT_NO_ASID_RETENTION;

	ktime_t cur = ktime_get();



	trace_tlbi_start(dev, 0);



	if (!use_tlbiall)

		writel_relaxed(cfg->asid, base + ARM_SMMU_CB_S1_TLBIASID);
@@ -1037,6 +1042,7 @@ static void arm_smmu_tlb_inv_context_s1(void *cookie) 
		writel_relaxed(0, base + ARM_SMMU_CB_S1_TLBIALL);



	arm_smmu_tlb_sync_context(cookie);

	trace_tlbi_end(dev, ktime_us_delta(ktime_get(), cur));

}



static void arm_smmu_tlb_inv_context_s2(void *cookie)