Add a new flag CORESIGHT_DESC_CPU_BOUND to indicate components that are CPU bound. Populate CPU ID into the coresight_device structure; otherwise, set CPU ID to -1 for non CPU bound devices.
Use the {0} initializer to clear coresight_desc structures to avoid uninitialized values.
Signed-off-by: Leo Yan leo.yan@arm.com --- drivers/hwtracing/coresight/coresight-catu.c | 2 +- drivers/hwtracing/coresight/coresight-core.c | 13 +++++++++++++ drivers/hwtracing/coresight/coresight-cti-core.c | 9 ++++++--- drivers/hwtracing/coresight/coresight-etm3x-core.c | 2 ++ drivers/hwtracing/coresight/coresight-etm4x-core.c | 2 ++ drivers/hwtracing/coresight/coresight-trbe.c | 2 ++ include/linux/coresight.h | 8 ++++++++ 7 files changed, 34 insertions(+), 4 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c index ce71dcddfca2558eddd625de58a709b151f2e07e..43abe13995cf3c96e70dcf97856872d70f71345a 100644 --- a/drivers/hwtracing/coresight/coresight-catu.c +++ b/drivers/hwtracing/coresight/coresight-catu.c @@ -514,7 +514,7 @@ static int __catu_probe(struct device *dev, struct resource *res) int ret = 0; u32 dma_mask; struct catu_drvdata *drvdata; - struct coresight_desc catu_desc; + struct coresight_desc catu_desc = { 0 }; struct coresight_platform_data *pdata = NULL; void __iomem *base;
diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 5452de9367d450de399a2107016c3fddb894fc82..89911fc27128b2bb78c8ba704f2af5a5d4efe83c 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -1338,6 +1338,19 @@ coresight_init_device(struct coresight_desc *desc) csdev->access = desc->access; csdev->orphan = true;
+ if (desc->flags & CORESIGHT_DESC_CPU_BOUND) { + csdev->cpu = desc->cpu; + } else { + /* A per-CPU source or sink must set CPU_BOUND flag */ + if (coresight_is_percpu_source(csdev) || + coresight_is_percpu_sink(csdev)) { + kfree(csdev); + return ERR_PTR(-EINVAL); + } + + csdev->cpu = -1; + } + csdev->dev.type = &coresight_dev_type[desc->type]; csdev->dev.groups = desc->groups; csdev->dev.parent = desc->dev; diff --git a/drivers/hwtracing/coresight/coresight-cti-core.c b/drivers/hwtracing/coresight/coresight-cti-core.c index 2f4c9362709a90b12a1aeb5016905b7d4474b912..b2c9a4db13b4e5554bca565c17ed299fdfdb30ff 100644 --- a/drivers/hwtracing/coresight/coresight-cti-core.c +++ b/drivers/hwtracing/coresight/coresight-cti-core.c @@ -659,7 +659,7 @@ static int cti_probe(struct amba_device *adev, const struct amba_id *id) void __iomem *base; struct device *dev = &adev->dev; struct cti_drvdata *drvdata = NULL; - struct coresight_desc cti_desc; + struct coresight_desc cti_desc = { 0 }; struct coresight_platform_data *pdata = NULL; struct resource *res = &adev->res;
@@ -702,11 +702,14 @@ static int cti_probe(struct amba_device *adev, const struct amba_id *id) * eCPU ID. System CTIs will have the name cti_sys<I> where I is an * index allocated by order of discovery. */ - if (drvdata->ctidev.cpu >= 0) + if (drvdata->ctidev.cpu >= 0) { + cti_desc.cpu = drvdata->ctidev.cpu; + cti_desc.flags = CORESIGHT_DESC_CPU_BOUND; cti_desc.name = devm_kasprintf(dev, GFP_KERNEL, "cti_cpu%d", drvdata->ctidev.cpu); - else + } else { cti_desc.name = coresight_alloc_device_name("cti_sys", dev); + } if (!cti_desc.name) return -ENOMEM;
diff --git a/drivers/hwtracing/coresight/coresight-etm3x-core.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c index a547a6d2e0bde84748f753e5529d316c4f5e82e2..eb665db1a37d9970f7f55395c0aa23b98a7f3118 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c @@ -891,6 +891,8 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id) desc.pdata = pdata; desc.dev = dev; desc.groups = coresight_etm_groups; + desc.cpu = drvdata->cpu; + desc.flags = CORESIGHT_DESC_CPU_BOUND; drvdata->csdev = coresight_register(&desc); if (IS_ERR(drvdata->csdev)) return PTR_ERR(drvdata->csdev); diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c index d565a73f0042e3e0b21fcf9cb94009cc25834d3d..b1e0254a534027d7ede8591e56be28745d0b9974 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c @@ -2260,6 +2260,8 @@ static int etm4_add_coresight_dev(struct etm4_init_arg *init_arg) desc.pdata = pdata; desc.dev = dev; desc.groups = coresight_etmv4_groups; + desc.cpu = drvdata->cpu; + desc.flags = CORESIGHT_DESC_CPU_BOUND; drvdata->csdev = coresight_register(&desc); if (IS_ERR(drvdata->csdev)) return PTR_ERR(drvdata->csdev); diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c index 1511f8eb95afb5b4610b8fbdacc8b174b6b08530..14e35b9660d76e47619cc6026b94929b3bb3e02b 100644 --- a/drivers/hwtracing/coresight/coresight-trbe.c +++ b/drivers/hwtracing/coresight/coresight-trbe.c @@ -1289,6 +1289,8 @@ static void arm_trbe_register_coresight_cpu(struct trbe_drvdata *drvdata, int cp desc.ops = &arm_trbe_cs_ops; desc.groups = arm_trbe_groups; desc.dev = dev; + desc.cpu = cpu; + desc.flags = CORESIGHT_DESC_CPU_BOUND; trbe_csdev = coresight_register(&desc); if (IS_ERR(trbe_csdev)) goto cpu_clear; diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 2131febebee93d609df1aea8534a10898b600be2..687190ca11ddeaa83193caa3903a480bac3060d1 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -141,6 +141,8 @@ struct csdev_access { .base = (_addr), \ })
+#define CORESIGHT_DESC_CPU_BOUND BIT(0) + /** * struct coresight_desc - description of a component required from drivers * @type: as defined by @coresight_dev_type. @@ -153,6 +155,8 @@ struct csdev_access { * in the component's sysfs sub-directory. * @name: name for the coresight device, also shown under sysfs. * @access: Describe access to the device + * @flags: The descritpion flags. + * @cpu: The CPU this component is affined to. */ struct coresight_desc { enum coresight_dev_type type; @@ -163,6 +167,8 @@ struct coresight_desc { const struct attribute_group **groups; const char *name; struct csdev_access access; + u32 flags; + int cpu; };
/** @@ -260,6 +266,7 @@ struct coresight_trace_id_map { * device's spinlock when the coresight_mutex held and mode == * CS_MODE_SYSFS. Otherwise it must be accessed from inside the * spinlock. + * @cpu: The CPU this component is affined to (-1 for not CPU bound). * @orphan: true if the component has connections that haven't been linked. * @sysfs_sink_activated: 'true' when a sink has been selected for use via sysfs * by writing a 1 to the 'enable_sink' file. A sink can be @@ -286,6 +293,7 @@ struct coresight_device { struct device dev; atomic_t mode; int refcnt; + int cpu; bool orphan; /* sink specific fields */ bool sysfs_sink_activated;