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coresight: Clear self hosted claim tag on probe

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This can be left behind from a crashed kernel after a kexec so clear it
when probing each device. Clearing the self hosted bit even when claimed
externally is harmless, so do it unconditionally.

Reviewed-by: Leo Yan <leo.yan@arm.com>
Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250325-james-coresight-claim-tags-v4-5-dfbd3822b2e5@linaro.org
This commit is contained in:
James Clark 2025-03-25 11:58:50 +00:00 • committed by Suzuki K Poulose
parent a1b0e77ce5
commit 7cd6368657
8 changed files with 11 additions and 0 deletions
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1
drivers/hwtracing/coresight/coresight-catu.c
View file

@ -567,6 +567,7 @@ static int __catu_probe(struct device *dev, struct resource *res)
catu_desc.subtype.helper_subtype = CORESIGHT_DEV_SUBTYPE_HELPER_CATU;
catu_desc.ops = &catu_ops;
coresight_clear_self_claim_tag(&catu_desc.access);
drvdata->csdev = coresight_register(&catu_desc);
if (IS_ERR(drvdata->csdev))
ret = PTR_ERR(drvdata->csdev);

2
drivers/hwtracing/coresight/coresight-cti-core.c
View file

@ -931,6 +931,8 @@ static int cti_probe(struct amba_device *adev, const struct amba_id *id)
cti_desc.ops = &cti_ops;
cti_desc.groups = drvdata->ctidev.con_groups;
cti_desc.dev = dev;
coresight_clear_self_claim_tag(&cti_desc.access);
drvdata->csdev = coresight_register(&cti_desc);
if (IS_ERR(drvdata->csdev)) {
ret = PTR_ERR(drvdata->csdev);

2
drivers/hwtracing/coresight/coresight-etb10.c
View file

@ -772,6 +772,8 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
desc.pdata = pdata;
desc.dev = dev;
desc.groups = coresight_etb_groups;
coresight_clear_self_claim_tag(&desc.access);
drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev))
return PTR_ERR(drvdata->csdev);

1
drivers/hwtracing/coresight/coresight-etm3x-core.c
View file

@ -764,6 +764,7 @@ static void etm_init_arch_data(void *info)
drvdata->nr_ext_out = BMVAL(etmccr, 20, 22);
drvdata->nr_ctxid_cmp = BMVAL(etmccr, 24, 25);
coresight_clear_self_claim_tag_unlocked(&drvdata->csa);
etm_set_pwrdwn(drvdata);
etm_clr_pwrup(drvdata);
CS_LOCK(drvdata->csa.base);

2
drivers/hwtracing/coresight/coresight-etm4x-core.c
View file

@ -1372,6 +1372,8 @@ static void etm4_init_arch_data(void *info)
drvdata->nrseqstate = FIELD_GET(TRCIDR5_NUMSEQSTATE_MASK, etmidr5);
/* NUMCNTR, bits[30:28] number of counters available for tracing */
drvdata->nr_cntr = FIELD_GET(TRCIDR5_NUMCNTR_MASK, etmidr5);
coresight_clear_self_claim_tag_unlocked(csa);
etm4_cs_lock(drvdata, csa);
cpu_detect_trace_filtering(drvdata);
}

1
drivers/hwtracing/coresight/coresight-funnel.c
View file

@ -255,6 +255,7 @@ static int funnel_probe(struct device *dev, struct resource *res)
drvdata->base = base;
desc.groups = coresight_funnel_groups;
desc.access = CSDEV_ACCESS_IOMEM(base);
coresight_clear_self_claim_tag(&desc.access);
}
dev_set_drvdata(dev, drvdata);

1
drivers/hwtracing/coresight/coresight-replicator.c
View file

@ -284,6 +284,7 @@ static int replicator_probe(struct device *dev, struct resource *res)
desc.pdata = dev->platform_data;
desc.dev = dev;
coresight_clear_self_claim_tag(&desc.access);
drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev)) {
ret = PTR_ERR(drvdata->csdev);

1
drivers/hwtracing/coresight/coresight-tmc-core.c
View file

@ -869,6 +869,7 @@ static int __tmc_probe(struct device *dev, struct resource *res)
dev->platform_data = pdata;
desc.pdata = pdata;
coresight_clear_self_claim_tag(&desc.access);
drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev)) {
ret = PTR_ERR(drvdata->csdev);