From: John Garry <john.garry@huawei.com>
To: <lorenzo.pieralisi@arm.com>, <guohanjun@huawei.com>,
<sudeep.holla@arm.com>, <robin.murphy@arm.com>,
<mark.rutland@arm.com>, <will@kernel.org>
Cc: nleeder@codeaurora.org, John Garry <john.garry@huawei.com>,
rjw@rjwysocki.net, linux-kernel@vger.kernel.org,
shameerali.kolothum.thodi@huawei.com, linuxarm@huawei.com,
iommu@lists.linux-foundation.org,
linux-arm-kernel@lists.infradead.org, lenb@kernel.org
Subject: [RFC PATCH 3/6] perf/smmuv3: Retrieve parent SMMUv3 IIDR
Date: Mon, 30 Sep 2019 22:33:48 +0800 [thread overview]
Message-ID: <1569854031-237636-4-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1569854031-237636-1-git-send-email-john.garry@huawei.com>
To support IMP DEF events per PMCG, retrieve the parent SMMUv3 IIDR. This
will be used as a lookup for the IMP DEF events supported, under the
assumption that a PMCG implementation has the same uniqueness as the
parent SMMUv3. In this, we assume that any PMCG associated with the same
SMMUv3 will have the same IMP DEF events - otherwise, some other
secondary matching would need to be done.
Signed-off-by: John Garry <john.garry@huawei.com>
---
drivers/perf/arm_smmuv3_pmu.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c
index da71c741cb46..f702898c695d 100644
--- a/drivers/perf/arm_smmuv3_pmu.c
+++ b/drivers/perf/arm_smmuv3_pmu.c
@@ -115,6 +115,7 @@ struct smmu_pmu {
bool global_filter;
u32 global_filter_span;
u32 global_filter_sid;
+ u32 parent_iidr;
};
#define to_smmu_pmu(p) (container_of(p, struct smmu_pmu, pmu))
@@ -551,6 +552,11 @@ static const struct attribute_group *smmu_pmu_attr_grps[] = {
NULL
};
+static const struct attribute_group **smmu_pmu_lookup_attr_groups(u32 parent_smmu_iidr)
+{
+ return smmu_pmu_attr_grps;
+}
+
/*
* Generic device handlers
*/
@@ -706,11 +712,21 @@ static int smmu_pmu_probe(struct platform_device *pdev)
int irq, err;
char *name;
struct device *dev = &pdev->dev;
+ struct device *parent = dev->parent;
smmu_pmu = devm_kzalloc(dev, sizeof(*smmu_pmu), GFP_KERNEL);
if (!smmu_pmu)
return -ENOMEM;
+ if (parent) {
+ void *parent_drvdata;
+
+ parent_drvdata = platform_get_drvdata(to_platform_device(parent));
+ if (!parent_drvdata)
+ return -EPROBE_DEFER;
+ smmu_pmu->parent_iidr = *(u32 *)parent_drvdata;
+ }
+
smmu_pmu->dev = dev;
platform_set_drvdata(pdev, smmu_pmu);
@@ -724,7 +740,7 @@ static int smmu_pmu_probe(struct platform_device *pdev)
.start = smmu_pmu_event_start,
.stop = smmu_pmu_event_stop,
.read = smmu_pmu_event_read,
- .attr_groups = smmu_pmu_attr_grps,
+ .attr_groups = smmu_pmu_lookup_attr_groups(smmu_pmu->parent_iidr),
.capabilities = PERF_PMU_CAP_NO_EXCLUDE,
};
--
2.17.1
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next prev parent reply other threads:[~2019-09-30 14:37 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-30 14:33 [RFC PATCH 0/6] SMMUv3 PMCG IMP DEF event support John Garry
2019-09-30 14:33 ` [RFC PATCH 1/6] ACPI/IORT: Set PMCG device parent John Garry
2019-10-15 2:35 ` Hanjun Guo
2019-10-15 9:07 ` John Garry
2019-09-30 14:33 ` [RFC PATCH 2/6] iommu/arm-smmu-v3: Record IIDR in arm_smmu_device structure John Garry
2019-09-30 14:33 ` John Garry [this message]
2019-09-30 14:33 ` [RFC PATCH 4/6] perf/smmuv3: Support HiSilicon hip08 (hi1620) IMP DEF events John Garry
2019-09-30 14:33 ` [RFC PATCH 5/6] perf/smmuv3: Match implementation options based on parent SMMU IIDR John Garry
2019-09-30 14:33 ` [RFC PATCH 6/6] ACPI/IORT: Drop code to set the PMCG software-defined model John Garry
2019-10-15 3:06 ` Hanjun Guo
2019-10-15 8:47 ` John Garry
2019-10-15 18:00 ` [RFC PATCH 0/6] SMMUv3 PMCG IMP DEF event support Robin Murphy
2019-10-16 8:47 ` John Garry
2019-10-16 10:51 ` Robin Murphy
2019-10-16 12:07 ` John Garry
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