diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm4x-core.c | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c index bf93147c23ca..e91e59ecec53 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c @@ -66,7 +66,6 @@ static u64 etm4_get_access_type(struct etmv4_config *config); static enum cpuhp_state hp_online; struct etm4_init_arg { - unsigned int pid; struct device *dev; struct csdev_access *csa; }; @@ -370,9 +369,17 @@ static void etm4_disable_arch_specific(struct etmv4_drvdata *drvdata) } static void etm4_check_arch_features(struct etmv4_drvdata *drvdata, - unsigned int id) + struct csdev_access *csa) { - if (etm4_hisi_match_pid(id)) + /* + * TRCPIDR* registers are not required for ETMs with system + * instructions. They must be identified by the MIDR+REVIDRs. + * Skip the TRCPID checks for now. + */ + if (!csa->io_mem) + return; + + if (etm4_hisi_match_pid(coresight_get_pid(csa))) set_bit(ETM4_IMPDEF_HISI_CORE_COMMIT, drvdata->arch_features); } #else @@ -385,7 +392,7 @@ static void etm4_disable_arch_specific(struct etmv4_drvdata *drvdata) } static void etm4_check_arch_features(struct etmv4_drvdata *drvdata, - unsigned int id) + struct csdev_access *csa) { } #endif /* CONFIG_ETM4X_IMPDEF_FEATURE */ @@ -1161,7 +1168,7 @@ static void etm4_init_arch_data(void *info) etm4_os_unlock_csa(drvdata, csa); etm4_cs_unlock(drvdata, csa); - etm4_check_arch_features(drvdata, init_arg->pid); + etm4_check_arch_features(drvdata, csa); /* find all capabilities of the tracing unit */ etmidr0 = etm4x_relaxed_read32(csa, TRCIDR0); @@ -2044,7 +2051,7 @@ static int etm4_add_coresight_dev(struct etm4_init_arg *init_arg) return 0; } -static int etm4_probe(struct device *dev, u32 etm_pid) +static int etm4_probe(struct device *dev) { struct etmv4_drvdata *drvdata = dev_get_drvdata(dev); struct csdev_access access = { 0 }; @@ -2073,7 +2080,6 @@ static int etm4_probe(struct device *dev, u32 etm_pid) init_arg.dev = dev; init_arg.csa = &access; - init_arg.pid = etm_pid; /* * Serialize against CPUHP callbacks to avoid race condition @@ -2120,7 +2126,7 @@ static int etm4_probe_amba(struct amba_device *adev, const struct amba_id *id) drvdata->base = base; dev_set_drvdata(dev, drvdata); - ret = etm4_probe(dev, id->id); + ret = etm4_probe(dev); if (!ret) pm_runtime_put(&adev->dev); @@ -2142,12 +2148,7 @@ static int etm4_probe_platform_dev(struct platform_device *pdev) pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); - /* - * System register based devices could match the - * HW by reading appropriate registers on the HW - * and thus we could skip the PID. - */ - ret = etm4_probe(&pdev->dev, 0); + ret = etm4_probe(&pdev->dev); pm_runtime_put(&pdev->dev); return ret; |