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coresight: tmc: clear has_iommu flag when smmu is bypassed

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When SMMU works in bypass mode, set has_iommu to false.  ETR
can use SG mode.

Change-Id: Ic7a6814cace92098473e4b5302408034e662058d
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
Signed-off-by: Mao Jinlong <jinlmao@codeaurora.org>
This commit is contained in:
Tingwei Zhang 2018-12-04 18:54:34 -08:00 • committed by Mao Jinlong
commit d107ab8fbd
1 changed files with 14 additions and 1 deletions
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15
drivers/hwtracing/coresight/coresight-tmc-etr.c
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@ -824,9 +824,22 @@ static struct etr_buf *tmc_alloc_etr_buf(struct tmc_drvdata *drvdata,
bool has_sg, has_catu;
struct etr_buf *etr_buf;
struct device *dev = &drvdata->csdev->dev;
int s1_bypass = 0;
struct iommu_domain *domain;
has_etr_sg = tmc_etr_has_cap(drvdata, TMC_ETR_SG);
has_iommu = iommu_get_domain_for_dev(dev->parent);
domain = iommu_get_domain_for_dev(dev->parent);
if (domain) {
iommu_domain_get_attr(domain, DOMAIN_ATTR_S1_BYPASS,
&s1_bypass);
if (s1_bypass)
has_iommu = false;
else
has_iommu = true;
} else {
has_iommu = false;
}
has_catu = !!tmc_etr_get_catu_device(drvdata);
has_sg = has_catu || has_etr_sg;