From: Xi Pardee Date: Tue, 5 May 2026 04:33:36 +0000 (-0700) Subject: platform/x86/intel/pmc: Add support for variable DMU offsets X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=ebbf33380896cc489e870d88004ad3750e908a6c;p=thirdparty%2Fkernel%2Flinux.git platform/x86/intel/pmc: Add support for variable DMU offsets Add support for handling different DMU Die C6 offsets across platforms. The previous implementation assumed a uniform DMU Die C6 offset for all platforms, which is no longer valid after an upcoming change. Signed-off-by: Xi Pardee Link: https://patch.msgid.link/20260505043342.2573556-6-xi.pardee@linux.intel.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen --- diff --git a/drivers/platform/x86/intel/pmc/arl.c b/drivers/platform/x86/intel/pmc/arl.c index 95372a0807acf..4d91ee010f6d0 100644 --- a/drivers/platform/x86/intel/pmc/arl.c +++ b/drivers/platform/x86/intel/pmc/arl.c @@ -729,6 +729,7 @@ struct pmc_dev_info arl_pmc_dev = { .init = arl_core_init, .sub_req = pmc_core_pmt_get_lpm_req, .ssram_hidden = true, + .die_c6_offset = MTL_PMT_DMU_DIE_C6_OFFSET, }; static u32 ARL_H_PMT_DMU_GUIDS[] = {ARL_PMT_DMU_GUID, ARL_H_PMT_DMU_GUID, 0x0}; @@ -742,4 +743,5 @@ struct pmc_dev_info arl_h_pmc_dev = { .init = arl_h_core_init, .sub_req = pmc_core_pmt_get_lpm_req, .ssram_hidden = true, + .die_c6_offset = MTL_PMT_DMU_DIE_C6_OFFSET, }; diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c index e0ac329e6723a..5d2e2681b0eba 100644 --- a/drivers/platform/x86/intel/pmc/core.c +++ b/drivers/platform/x86/intel/pmc/core.c @@ -1381,7 +1381,7 @@ void pmc_core_punit_pmt_init(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_de } pmcdev->punit_ep = ep; - pmcdev->die_c6_offset = MTL_PMT_DMU_DIE_C6_OFFSET; + pmcdev->die_c6_offset = pmc_dev_info->die_c6_offset; } if (pmc_dev_info->pc_guid) { diff --git a/drivers/platform/x86/intel/pmc/core.h b/drivers/platform/x86/intel/pmc/core.h index f385a0eccd2c2..ef69de160ffbc 100644 --- a/drivers/platform/x86/intel/pmc/core.h +++ b/drivers/platform/x86/intel/pmc/core.h @@ -514,6 +514,7 @@ enum pmc_index { * @init: Function to perform platform specific init action * @sub_req: Function to achieve low power mode substate requirements * @ssram_hidden: Some SSRAM devices are hidden on this platform + * @die_c6_offset: Telemetry offset to read Die C6 residency */ struct pmc_dev_info { u32 *dmu_guids; @@ -530,6 +531,7 @@ struct pmc_dev_info { int (*init)(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info); int (*sub_req)(struct pmc_dev *pmcdev, struct pmc *pmc, struct telem_endpoint *ep); bool ssram_hidden; + u32 die_c6_offset; }; extern const struct pmc_bit_map msr_map[]; diff --git a/drivers/platform/x86/intel/pmc/mtl.c b/drivers/platform/x86/intel/pmc/mtl.c index 193ebbe584023..b724dd8c34dba 100644 --- a/drivers/platform/x86/intel/pmc/mtl.c +++ b/drivers/platform/x86/intel/pmc/mtl.c @@ -1003,4 +1003,5 @@ struct pmc_dev_info mtl_pmc_dev = { .init = mtl_core_init, .sub_req = pmc_core_pmt_get_lpm_req, .ssram_hidden = true, + .die_c6_offset = MTL_PMT_DMU_DIE_C6_OFFSET, };