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authorQi Liu <liuqi115@huawei.com>2020-07-17 11:49:23 +0300
committerWill Deacon <will@kernel.org>2020-07-17 12:51:44 +0300
commitf32ed8eb0e3f0d0ef4ddb854554d60ca5863a9f9 (patch)
tree455b30ad8a4efffe84e472e9036fcd319eab0f82 /drivers/perf
parentbd024e82e4cd95c7f1a475a55f99871936c2b2db (diff)
downloadlinux-f32ed8eb0e3f0d0ef4ddb854554d60ca5863a9f9.tar.xz
drivers/perf: Prevent forced unbinding of PMU drivers
Forcefully unbinding PMU drivers during perf sampling will lead to a kernel panic, because the perf upper-layer framework call a NULL pointer in this situation. To solve this issue, "suppress_bind_attrs" should be set to true, so that bind/unbind can be disabled via sysfs and prevent unbinding PMU drivers during perf sampling. Signed-off-by: Qi Liu <liuqi115@huawei.com> Reviewed-by: John Garry <john.garry@huawei.com> Link: https://lore.kernel.org/r/1594975763-32966-1-git-send-email-liuqi115@huawei.com Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/perf')
-rw-r--r--drivers/perf/arm-cci.c1
-rw-r--r--drivers/perf/arm-ccn.c1
-rw-r--r--drivers/perf/arm_dsu_pmu.c1
-rw-r--r--drivers/perf/arm_smmuv3_pmu.c1
-rw-r--r--drivers/perf/arm_spe_pmu.c1
-rw-r--r--drivers/perf/fsl_imx8_ddr_perf.c1
-rw-r--r--drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c1
-rw-r--r--drivers/perf/hisilicon/hisi_uncore_hha_pmu.c1
-rw-r--r--drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c1
-rw-r--r--drivers/perf/qcom_l2_pmu.c1
-rw-r--r--drivers/perf/qcom_l3_pmu.c1
-rw-r--r--drivers/perf/thunderx2_pmu.c1
-rw-r--r--drivers/perf/xgene_pmu.c1
13 files changed, 13 insertions, 0 deletions
diff --git a/drivers/perf/arm-cci.c b/drivers/perf/arm-cci.c
index 1b8e337a29ca..87c4be9dd412 100644
--- a/drivers/perf/arm-cci.c
+++ b/drivers/perf/arm-cci.c
@@ -1718,6 +1718,7 @@ static struct platform_driver cci_pmu_driver = {
.driver = {
.name = DRIVER_NAME,
.of_match_table = arm_cci_pmu_matches,
+ .suppress_bind_attrs = true,
},
.probe = cci_pmu_probe,
.remove = cci_pmu_remove,
diff --git a/drivers/perf/arm-ccn.c b/drivers/perf/arm-ccn.c
index d50edef91f59..7b7d23f25713 100644
--- a/drivers/perf/arm-ccn.c
+++ b/drivers/perf/arm-ccn.c
@@ -1545,6 +1545,7 @@ static struct platform_driver arm_ccn_driver = {
.driver = {
.name = "arm-ccn",
.of_match_table = arm_ccn_match,
+ .suppress_bind_attrs = true,
},
.probe = arm_ccn_probe,
.remove = arm_ccn_remove,
diff --git a/drivers/perf/arm_dsu_pmu.c b/drivers/perf/arm_dsu_pmu.c
index 518d0603e24f..96ed93cc78e6 100644
--- a/drivers/perf/arm_dsu_pmu.c
+++ b/drivers/perf/arm_dsu_pmu.c
@@ -757,6 +757,7 @@ static struct platform_driver dsu_pmu_driver = {
.driver = {
.name = DRVNAME,
.of_match_table = of_match_ptr(dsu_pmu_of_match),
+ .suppress_bind_attrs = true,
},
.probe = dsu_pmu_device_probe,
.remove = dsu_pmu_device_remove,
diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c
index 90caba56dfbc..4cdb35d166ac 100644
--- a/drivers/perf/arm_smmuv3_pmu.c
+++ b/drivers/perf/arm_smmuv3_pmu.c
@@ -860,6 +860,7 @@ static void smmu_pmu_shutdown(struct platform_device *pdev)
static struct platform_driver smmu_pmu_driver = {
.driver = {
.name = "arm-smmu-v3-pmcg",
+ .suppress_bind_attrs = true,
},
.probe = smmu_pmu_probe,
.remove = smmu_pmu_remove,
diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index d80f48798bce..e51ddb6d63ed 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -1226,6 +1226,7 @@ static struct platform_driver arm_spe_pmu_driver = {
.driver = {
.name = DRVNAME,
.of_match_table = of_match_ptr(arm_spe_pmu_of_match),
+ .suppress_bind_attrs = true,
},
.probe = arm_spe_pmu_device_probe,
.remove = arm_spe_pmu_device_remove,
diff --git a/drivers/perf/fsl_imx8_ddr_perf.c b/drivers/perf/fsl_imx8_ddr_perf.c
index 2aed2d96f8ae..397540a4b799 100644
--- a/drivers/perf/fsl_imx8_ddr_perf.c
+++ b/drivers/perf/fsl_imx8_ddr_perf.c
@@ -707,6 +707,7 @@ static struct platform_driver imx_ddr_pmu_driver = {
.driver = {
.name = "imx-ddr-pmu",
.of_match_table = imx_ddr_pmu_dt_ids,
+ .suppress_bind_attrs = true,
},
.probe = ddr_perf_probe,
.remove = ddr_perf_remove,
diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
index 71587f19fcd5..5e3645c96443 100644
--- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
@@ -419,6 +419,7 @@ static struct platform_driver hisi_ddrc_pmu_driver = {
.driver = {
.name = "hisi_ddrc_pmu",
.acpi_match_table = ACPI_PTR(hisi_ddrc_pmu_acpi_match),
+ .suppress_bind_attrs = true,
},
.probe = hisi_ddrc_pmu_probe,
.remove = hisi_ddrc_pmu_remove,
diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
index c199de7b219d..5eb8168029c0 100644
--- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
@@ -431,6 +431,7 @@ static struct platform_driver hisi_hha_pmu_driver = {
.driver = {
.name = "hisi_hha_pmu",
.acpi_match_table = ACPI_PTR(hisi_hha_pmu_acpi_match),
+ .suppress_bind_attrs = true,
},
.probe = hisi_hha_pmu_probe,
.remove = hisi_hha_pmu_remove,
diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
index 567d7e6f69d8..3e8b5eab5514 100644
--- a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
@@ -421,6 +421,7 @@ static struct platform_driver hisi_l3c_pmu_driver = {
.driver = {
.name = "hisi_l3c_pmu",
.acpi_match_table = ACPI_PTR(hisi_l3c_pmu_acpi_match),
+ .suppress_bind_attrs = true,
},
.probe = hisi_l3c_pmu_probe,
.remove = hisi_l3c_pmu_remove,
diff --git a/drivers/perf/qcom_l2_pmu.c b/drivers/perf/qcom_l2_pmu.c
index 21d6991dbe0b..4da37f650f98 100644
--- a/drivers/perf/qcom_l2_pmu.c
+++ b/drivers/perf/qcom_l2_pmu.c
@@ -1028,6 +1028,7 @@ static struct platform_driver l2_cache_pmu_driver = {
.driver = {
.name = "qcom-l2cache-pmu",
.acpi_match_table = ACPI_PTR(l2_cache_pmu_acpi_match),
+ .suppress_bind_attrs = true,
},
.probe = l2_cache_pmu_probe,
.remove = l2_cache_pmu_remove,
diff --git a/drivers/perf/qcom_l3_pmu.c b/drivers/perf/qcom_l3_pmu.c
index 656e830798d9..9ddb577c542b 100644
--- a/drivers/perf/qcom_l3_pmu.c
+++ b/drivers/perf/qcom_l3_pmu.c
@@ -814,6 +814,7 @@ static struct platform_driver qcom_l3_cache_pmu_driver = {
.driver = {
.name = "qcom-l3cache-pmu",
.acpi_match_table = ACPI_PTR(qcom_l3_cache_pmu_acpi_match),
+ .suppress_bind_attrs = true,
},
.probe = qcom_l3_cache_pmu_probe,
};
diff --git a/drivers/perf/thunderx2_pmu.c b/drivers/perf/thunderx2_pmu.c
index 51b31d6ff2c4..aac9823b0c6b 100644
--- a/drivers/perf/thunderx2_pmu.c
+++ b/drivers/perf/thunderx2_pmu.c
@@ -1017,6 +1017,7 @@ static struct platform_driver tx2_uncore_driver = {
.driver = {
.name = "tx2-uncore-pmu",
.acpi_match_table = ACPI_PTR(tx2_uncore_acpi_match),
+ .suppress_bind_attrs = true,
},
.probe = tx2_uncore_probe,
.remove = tx2_uncore_remove,
diff --git a/drivers/perf/xgene_pmu.c b/drivers/perf/xgene_pmu.c
index 46ee6807d533..edac28cd25dd 100644
--- a/drivers/perf/xgene_pmu.c
+++ b/drivers/perf/xgene_pmu.c
@@ -1975,6 +1975,7 @@ static struct platform_driver xgene_pmu_driver = {
.name = "xgene-pmu",
.of_match_table = xgene_pmu_of_match,
.acpi_match_table = ACPI_PTR(xgene_pmu_acpi_match),
+ .suppress_bind_attrs = true,
},
};