diff options
| author | Shyam Sundar S K <Shyam-sundar.S-k@amd.com> | 2026-06-09 13:40:39 +0530 |
|---|---|---|
| committer | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2026-07-10 15:13:44 +0300 |
| commit | 1983d7dee5db2bd17bf99ac22bddeebbc5f3e38c (patch) | |
| tree | 53522da3f49aff09bc11e20845fee91d35fbe1f0 | |
| parent | 98432eec31803ae8707a9fd593ba64cd2648aa74 (diff) | |
| download | linux-1983d7dee5db2bd17bf99ac22bddeebbc5f3e38c.tar.gz linux-1983d7dee5db2bd17bf99ac22bddeebbc5f3e38c.zip | |
platform/x86/amd/pmf: store BIOS output values for user-space metrics via util IOCTL
Add a bios_output[] to amd_pmf_dev struct and store the latest values for
BIOS output policies when applying PMF policies. This enables the AMD PMF
util layer to expose these BIOS outputs alongside selected thermal and
power metrics to user space via /dev/amdpmf_interface and a new IOCTL,
supporting real-time monitoring tools such as SystemDeck.
Co-developed-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://patch.msgid.link/20260609081044.2416731-3-Shyam-sundar.S-k@amd.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
| -rw-r--r-- | drivers/platform/x86/amd/pmf/pmf.h | 2 | ||||
| -rw-r--r-- | drivers/platform/x86/amd/pmf/tee-if.c | 13 | ||||
| -rw-r--r-- | include/uapi/linux/amd-pmf.h | 1 |
3 files changed, 14 insertions, 2 deletions
diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h index 6f61076a9386..ffe74ebc46f8 100644 --- a/drivers/platform/x86/amd/pmf/pmf.h +++ b/drivers/platform/x86/amd/pmf/pmf.h @@ -130,6 +130,7 @@ struct cookie_header { #define GET_CMD true #define METRICS_TABLE_ID 7 +#define BIOS_OUTPUT_MAX 10 typedef void (*apmf_event_handler_t)(acpi_handle handle, u32 event, void *data); @@ -442,6 +443,7 @@ struct amd_pmf_dev { struct pmf_cbi_ring_buffer cbi_buf; struct mutex cbi_mutex; /* Protects ring buffer access */ struct mutex metrics_mutex; + u32 bios_output[BIOS_OUTPUT_MAX]; }; struct apmf_sps_prop_granular_v2 { diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c index 7ccd93f506b2..3fe79f0f37c5 100644 --- a/drivers/platform/x86/amd/pmf/tee-if.c +++ b/drivers/platform/x86/amd/pmf/tee-if.c @@ -8,7 +8,9 @@ * Author: Shyam Sundar S K <Shyam-sundar.S-k@amd.com> */ +#include <linux/array_size.h> #include <linux/debugfs.h> +#include <linux/dev_printk.h> #include <linux/tee_drv.h> #include <linux/uuid.h> #include "pmf.h" @@ -97,11 +99,18 @@ static int amd_pmf_get_bios_output_idx(u32 action_idx) static void amd_pmf_update_bios_output(struct amd_pmf_dev *pdev, struct ta_pmf_action *action) { - u32 bios_idx; + int bios_idx; + int ret; bios_idx = amd_pmf_get_bios_output_idx(action->action_index); + if (bios_idx < 0 || bios_idx >= ARRAY_SIZE(pdev->bios_output)) { + dev_warn(pdev->dev, "BIOS output index %d out of bounds\n", bios_idx); + return; + } - amd_pmf_smartpc_apply_bios_output(pdev, action->value, BIT(bios_idx), bios_idx); + ret = amd_pmf_smartpc_apply_bios_output(pdev, action->value, BIT(bios_idx), bios_idx); + if (!ret) + pdev->bios_output[bios_idx] = action->value; } static void amd_pmf_apply_policies(struct amd_pmf_dev *dev, struct ta_pmf_enact_result *out) diff --git a/include/uapi/linux/amd-pmf.h b/include/uapi/linux/amd-pmf.h index bbbd39b2ce15..90bc2970665d 100644 --- a/include/uapi/linux/amd-pmf.h +++ b/include/uapi/linux/amd-pmf.h @@ -66,6 +66,7 @@ struct amd_pmf_info { /* BIOS parameters */ __u32 bios_input[AMD_PMF_BIOS_PARAMS_MAX]; + __u32 bios_output[AMD_PMF_BIOS_PARAMS_MAX]; }; #endif /* _UAPI_LINUX_AMD_PMF_H */ |