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platform/x86/amd/pmf: store BIOS output values for user-space metrics via util IOCTL

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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>
This commit is contained in:
Shyam Sundar S K 2026-06-09 13:40:39 +05:30 committed by Ilpo Järvinen
parent 98432eec31
commit 1983d7dee5
No known key found for this signature in database
GPG Key ID: 59AC4F6153E5CE31
3 changed files with 14 additions and 2 deletions
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2
drivers/platform/x86/amd/pmf/pmf.h
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@ -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 {

13
drivers/platform/x86/amd/pmf/tee-if.c
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@ -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)

1
include/uapi/linux/amd-pmf.h
View File

@ -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 */