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CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230040)(1800799024)(82310400026)(36860700013)(376014); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Oct 2024 10:07:19.2823 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e32fd990-532b-4055-18e2-08dcee937c6a X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EE39.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5755 Replace a similar chunk of code in amd_pstate_init() with amd_pstate_register() call. Suggested-by: Mario Limonciello Signed-off-by: Dhananjay Ugwekar --- drivers/cpufreq/amd-pstate.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index b0a1c472cc3b..856f0d11983e 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -1879,17 +1879,10 @@ static int __init amd_pstate_init(void) return ret; } - /* enable amd pstate feature */ - ret = amd_pstate_enable(true); - if (ret) { - pr_err("failed to enable driver mode(%d)\n", cppc_state); - return ret; - } - - ret = cpufreq_register_driver(current_pstate_driver); + ret = amd_pstate_register_driver(cppc_state); if (ret) { pr_err("failed to register with return %d\n", ret); - goto disable_driver; + return ret; } dev_root = bus_get_dev_root(&cpu_subsys); @@ -1906,7 +1899,6 @@ static int __init amd_pstate_init(void) global_attr_free: cpufreq_unregister_driver(current_pstate_driver); -disable_driver: amd_pstate_enable(false); 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Signed-off-by: Dhananjay Ugwekar --- drivers/cpufreq/amd-pstate.c | 47 +++++++++++++++++------------------- 1 file changed, 22 insertions(+), 25 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 856f0d11983e..5155fc0019df 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -1191,16 +1191,32 @@ static void amd_pstate_driver_cleanup(void) current_pstate_driver = NULL; } +static int amd_pstate_set_driver(int mode_idx) +{ + if (mode_idx >= AMD_PSTATE_DISABLE && mode_idx < AMD_PSTATE_MAX) { + cppc_state = mode_idx; + if (cppc_state == AMD_PSTATE_DISABLE) + pr_info("driver is explicitly disabled\n"); + + if (cppc_state == AMD_PSTATE_ACTIVE) + current_pstate_driver = &amd_pstate_epp_driver; + + if (cppc_state == AMD_PSTATE_PASSIVE || cppc_state == AMD_PSTATE_GUIDED) + current_pstate_driver = &amd_pstate_driver; + + return 0; + } + + return -EINVAL; +} + static int amd_pstate_register_driver(int mode) { int ret; - if (mode == AMD_PSTATE_PASSIVE || mode == AMD_PSTATE_GUIDED) - current_pstate_driver = &amd_pstate_driver; - else if (mode == AMD_PSTATE_ACTIVE) - current_pstate_driver = &amd_pstate_epp_driver; - else - return -EINVAL; + ret = amd_pstate_set_driver(mode); + if (ret) + return ret; cppc_state = mode; @@ -1726,25 +1742,6 @@ static struct cpufreq_driver amd_pstate_epp_driver = { .attr = amd_pstate_epp_attr, }; -static int __init amd_pstate_set_driver(int mode_idx) -{ - if (mode_idx >= AMD_PSTATE_DISABLE && mode_idx < AMD_PSTATE_MAX) { - cppc_state = mode_idx; - if (cppc_state == AMD_PSTATE_DISABLE) - pr_info("driver is explicitly disabled\n"); - - if (cppc_state == AMD_PSTATE_ACTIVE) - current_pstate_driver = &amd_pstate_epp_driver; - - if (cppc_state == AMD_PSTATE_PASSIVE || cppc_state == AMD_PSTATE_GUIDED) - current_pstate_driver = &amd_pstate_driver; - - return 0; - } - - return -EINVAL; -} - /* * CPPC function is not supported for family ID 17H with model_ID ranging from 0x10 to 0x2F. * show the debug message that helps to check if the CPU has CPPC support for loading issue. 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Signed-off-by: Dhananjay Ugwekar --- drivers/cpufreq/amd-pstate.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 5155fc0019df..13ee5cac901d 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -1843,21 +1843,15 @@ static int __init amd_pstate_init(void) cppc_state = CONFIG_X86_AMD_PSTATE_DEFAULT_MODE; } - switch (cppc_state) { - case AMD_PSTATE_DISABLE: + if (cppc_state == AMD_PSTATE_DISABLE) { pr_info("driver load is disabled, boot with specific mode to enable this\n"); return -ENODEV; - case AMD_PSTATE_PASSIVE: - case AMD_PSTATE_ACTIVE: - case AMD_PSTATE_GUIDED: - ret = amd_pstate_set_driver(cppc_state); - if (ret) - return ret; - break; - default: - return -EINVAL; } + ret = amd_pstate_set_driver(cppc_state); + if (ret) + return ret; + /* capability check */ if (cpu_feature_enabled(X86_FEATURE_CPPC)) { pr_debug("AMD CPPC MSR based functionality is supported\n"); 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Move around code and eliminate the redundancy. Signed-off-by: Dhananjay Ugwekar Tested-by: Klara Modin --- drivers/cpufreq/amd-pstate.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 13ee5cac901d..6f6d961879cc 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -1848,9 +1848,11 @@ static int __init amd_pstate_init(void) return -ENODEV; } - ret = amd_pstate_set_driver(cppc_state); - if (ret) + ret = amd_pstate_register_driver(cppc_state); + if (ret) { + pr_err("failed to register with return %d\n", ret); return ret; + } /* capability check */ if (cpu_feature_enabled(X86_FEATURE_CPPC)) { @@ -1870,12 +1872,6 @@ static int __init amd_pstate_init(void) return ret; } - ret = amd_pstate_register_driver(cppc_state); - if (ret) { - pr_err("failed to register with return %d\n", ret); - return ret; - } - dev_root = bus_get_dev_root(&cpu_subsys); if (dev_root) { ret = sysfs_create_group(&dev_root->kobj, &amd_pstate_global_attr_group);