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Tue, 11 Feb 2025 02:37:55 -0800 From: Sumit Gupta To: , , , , , , , , , CC: , , , , , , , , Subject: [Patch 2/5] ACPI: CPPC: expand macro to create store acpi_cppc sysfs node Date: Tue, 11 Feb 2025 16:07:34 +0530 Message-ID: <20250211103737.447704-3-sumitg@nvidia.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250211103737.447704-1-sumitg@nvidia.com> References: <20250211103737.447704-1-sumitg@nvidia.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF00001509:EE_|CH3PR12MB7739:EE_ X-MS-Office365-Filtering-Correlation-Id: 09a95590-d5c9-44c4-e8b4-08dd4a882dc3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|7416014|376014|36860700013|82310400026|1800799024|921020; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc6edge1.nvidia.com; CAT:NONE; SFS:(13230040)(7416014)(376014)(36860700013)(82310400026)(1800799024)(921020); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Feb 2025 10:38:09.8737 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 09a95590-d5c9-44c4-e8b4-08dd4a882dc3 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.160]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00001509.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB7739 Rename show_cppc_data() macro to sysfs_cppc_data() and expand it to enable creating the acpi_cppc sysfs store node. Signed-off-by: Sumit Gupta --- drivers/acpi/cppc_acpi.c | 37 +++++++++++++++++++++++-------------- 1 file changed, 23 insertions(+), 14 deletions(-) diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 297e689f8214..cc2bf958e84f 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -139,12 +139,21 @@ static DEFINE_PER_CPU(struct cpc_desc *, cpc_desc_ptr); #define OVER_16BTS_MASK ~0xFFFFULL #define define_one_cppc_ro(_name) \ -static struct kobj_attribute _name = \ + static struct kobj_attribute _name = \ __ATTR(_name, 0444, show_##_name, NULL) +#define define_one_cppc_rw(_name) \ + static struct kobj_attribute _name = \ +__ATTR(_name, 0644, show_##_name, store_##_name) + #define to_cpc_desc(a) container_of(a, struct cpc_desc, kobj) -#define show_cppc_data(access_fn, struct_name, member_name) \ +#define define_one_cppc(member_name, mode) define_one_cppc_attr(mode, member_name) +#define define_one_cppc_attr(mode, member_name) define_one_cppc_attr_##mode(member_name) +#define define_one_cppc_attr_ro(member_name) define_one_cppc_ro(member_name) +#define define_one_cppc_attr_rw(member_name) define_one_cppc_rw(member_name) + +#define sysfs_cppc_data(access_fn, struct_name, member_name, mode) \ static ssize_t show_##member_name(struct kobject *kobj, \ struct kobj_attribute *attr, char *buf) \ { \ @@ -159,18 +168,18 @@ __ATTR(_name, 0444, show_##_name, NULL) return sysfs_emit(buf, "%llu\n", \ (u64)st_name.member_name); \ } \ - define_one_cppc_ro(member_name) - -show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, highest_perf); -show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, lowest_perf); -show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, nominal_perf); -show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, lowest_nonlinear_perf); -show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, guaranteed_perf); -show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, lowest_freq); -show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, nominal_freq); - -show_cppc_data(cppc_get_perf_fb_ctrs, cppc_perf_fb_ctrs, reference_perf); -show_cppc_data(cppc_get_perf_fb_ctrs, cppc_perf_fb_ctrs, wraparound_time); + define_one_cppc(member_name, mode) + +sysfs_cppc_data(cppc_get_perf_caps, cppc_perf_caps, highest_perf, ro); +sysfs_cppc_data(cppc_get_perf_caps, cppc_perf_caps, lowest_perf, ro); +sysfs_cppc_data(cppc_get_perf_caps, cppc_perf_caps, nominal_perf, ro); +sysfs_cppc_data(cppc_get_perf_caps, cppc_perf_caps, lowest_nonlinear_perf, ro); +sysfs_cppc_data(cppc_get_perf_caps, cppc_perf_caps, guaranteed_perf, ro); +sysfs_cppc_data(cppc_get_perf_caps, cppc_perf_caps, lowest_freq, ro); +sysfs_cppc_data(cppc_get_perf_caps, cppc_perf_caps, nominal_freq, ro); + +sysfs_cppc_data(cppc_get_perf_fb_ctrs, cppc_perf_fb_ctrs, reference_perf, ro); +sysfs_cppc_data(cppc_get_perf_fb_ctrs, cppc_perf_fb_ctrs, wraparound_time, ro); /* Check for valid access_width, otherwise, fallback to using bit_width */ #define GET_BIT_WIDTH(reg) ((reg)->access_width ? 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Also, add information about other regsiters like Guaranteed performance and Performance limited. Signed-off-by: Sumit Gupta --- Documentation/admin-guide/acpi/cppc_sysfs.rst | 28 +++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/Documentation/admin-guide/acpi/cppc_sysfs.rst b/Documentation/admin-guide/acpi/cppc_sysfs.rst index 36981c667823..ff3f48d95bb7 100644 --- a/Documentation/admin-guide/acpi/cppc_sysfs.rst +++ b/Documentation/admin-guide/acpi/cppc_sysfs.rst @@ -27,22 +27,33 @@ for each cpu X:: $ ls -lR /sys/devices/system/cpu/cpu0/acpi_cppc/ /sys/devices/system/cpu/cpu0/acpi_cppc/: total 0 + -r--r--r-- 1 root root 65536 Mar 5 19:38 auto_activity_window + -rw-r--r-- 1 root root 65536 Mar 5 19:38 auto_sel + -rw-r--r-- 1 root root 65536 Mar 5 19:38 energy_perf -r--r--r-- 1 root root 65536 Mar 5 19:38 feedback_ctrs + -r--r--r-- 1 root root 65536 Mar 5 19:38 guaranteed_perf -r--r--r-- 1 root root 65536 Mar 5 19:38 highest_perf -r--r--r-- 1 root root 65536 Mar 5 19:38 lowest_freq -r--r--r-- 1 root root 65536 Mar 5 19:38 lowest_nonlinear_perf -r--r--r-- 1 root root 65536 Mar 5 19:38 lowest_perf + -rw-r--r-- 1 root root 65536 Mar 5 19:38 max_perf + -rw-r--r-- 1 root root 65536 Mar 5 19:38 min_perf -r--r--r-- 1 root root 65536 Mar 5 19:38 nominal_freq -r--r--r-- 1 root root 65536 Mar 5 19:38 nominal_perf + -r--r--r-- 1 root root 65536 Mar 5 19:38 per_limited -r--r--r-- 1 root root 65536 Mar 5 19:38 reference_perf -r--r--r-- 1 root root 65536 Mar 5 19:38 wraparound_time +Performance Capabilities / Thresholds: * highest_perf : Highest performance of this processor (abstract scale). * nominal_perf : Highest sustained performance of this processor (abstract scale). * lowest_nonlinear_perf : Lowest performance of this processor with nonlinear power savings (abstract scale). * lowest_perf : Lowest performance of this processor (abstract scale). +* guaranteed_perf : Current maximum sustained performance level of a processor, + taking into account all known external constraints. All processors are expected + to be able to sustain their guaranteed performance levels simultaneously. * lowest_freq : CPU frequency corresponding to lowest_perf (in MHz). * nominal_freq : CPU frequency corresponding to nominal_perf (in MHz). @@ -50,6 +61,7 @@ for each cpu X:: frequency instead of abstract scale. These values should not be used for any functional decisions. +Performance Feedback: * feedback_ctrs : Includes both Reference and delivered performance counter. Reference counter ticks up proportional to processor's reference performance. Delivered counter ticks up proportional to processor's delivered performance. @@ -57,6 +69,22 @@ for each cpu X:: (seconds). * reference_perf : Performance level at which reference performance counter accumulates (abstract scale). +* perf_limited : Set when Delivered Performance has been constrained due to an + unpredictable event. It is not utilized when Autonomous Selection is enabled. + +Performance Controls: +* max_perf : Maximum performance level at which the platform may run in the + range [Lowest Performance, Highest Performance], inclusive. +* min_perf : Minimum performance level at which the platform may run in the + range [Lowest Performance, Highest Performance], inclusive but must be set + to a value that is less than or equal to that specified by the max_perf. +* auto_sel : Enable Autonomous Performance Level Selection on this processor. +* auto_activity_window : Indicates a moving utilization sensitivity window to + the platform’s autonomous selection policy. +* energy_perf: Provides a value ranging from 0 (performance preference) to + 0xFF (energy efficiency preference) that influences the rate of performance + increase /decrease and the result of the hardware's energy efficiency and + performance optimization policies. Computing Average Delivered Performance