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platform/x86: ISST: Just allow 2 bits for SST feature enable

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Currently only 2 features SST-TF and SST-BF are supported, so only allow
bit 0 and bit 1.

Fixes: ea009e4769 ("platform/x86: ISST: Add SST-PP support via TPMI")
Cc: stable@vger.kernel.org
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20260811221514.3905817-7-srinivas.pandruvada@linux.intel.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:
Srinivas Pandruvada 2026-08-11 15:15:14 -07:00 committed by Ilpo Järvinen
parent 9b9026943b
commit 0f377f2b47
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GPG Key ID: 59AC4F6153E5CE31
1 changed files with 4 additions and 0 deletions
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4
drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c
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@ -882,6 +882,7 @@ static long isst_if_clos_assoc(void __user *argp)
#define SST_PP_FEATURE_STATE_START 8
#define SST_PP_FEATURE_STATE_WIDTH 8
#define SST_PP_FEATURE_STATE_VALID_MASK GENMASK(1, 0)
#define SST_BF_FEATURE_SUPPORTED_START 12
#define SST_BF_FEATURE_SUPPORTED_WIDTH 1
@ -1035,6 +1036,9 @@ static int isst_if_set_perf_feature(void __user *argp)
if (power_domain_info->write_blocked || !capable(CAP_SYS_ADMIN))
return -EPERM;
if (perf_feature.feature & ~SST_PP_FEATURE_STATE_VALID_MASK)
return -EINVAL;
_write_pp_info("perf_feature", perf_feature.feature, SST_PP_CONTROL_OFFSET,
SST_PP_FEATURE_STATE_START, SST_PP_FEATURE_STATE_WIDTH,
SST_MUL_FACTOR_NONE)