From: Sumeet Pawnikar sumeet.r.pawnikar@intel.com
[ Upstream commit d05b5e0baf424c8c4b4709ac11f66ab726c8deaf ]
The current initialization of the struct x86_cpu_id via pl4_support_ids[] is partial and wrong. It is initializing "stepping" field with "X86_FEATURE_ANY" instead of "feature" field.
Use X86_MATCH_INTEL_FAM6_MODEL macro instead of initializing each field of the struct x86_cpu_id for pl4_supported list of CPUs. This X86_MATCH_INTEL_FAM6_MODEL macro internally uses another macro X86_MATCH_VENDOR_FAM_MODEL_FEATURE for X86 based CPU matching with appropriate initialized values.
Reported-by: Dave Hansen dave.hansen@intel.com Link: https://lore.kernel.org/lkml/28ead36b-2d9e-1a36-6f4e-04684e420260@intel.com Fixes: eb52bc2ae5b8 ("powercap: RAPL: Add Power Limit4 support for Meteor Lake SoC") Fixes: b08b95cf30f5 ("powercap: RAPL: Add Power Limit4 support for Alder Lake-N and Raptor Lake-P") Fixes: 515755906921 ("powercap: RAPL: Add Power Limit4 support for RaptorLake") Fixes: 1cc5b9a411e4 ("powercap: Add Power Limit4 support for Alder Lake SoC") Fixes: 8365a898fe53 ("powercap: Add Power Limit4 support") Signed-off-by: Sumeet Pawnikar sumeet.r.pawnikar@intel.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com [ Ricardo: I only kept TIGERLAKE, ALDERLAKE, and ALDERLAKE_L in pl4_support_ids as only these models are enumerated before this changeset. ] Signed-off-by: Ricardo Neri ricardo.neri-calderon@linux.intel.com --- I tested this backport on Alder Lake and Meteor Lake systems. printk() tells me that the former is detected whereas the latter is not. The stepping and the feature fields are 0 as expected. --- drivers/powercap/intel_rapl_msr.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/powercap/intel_rapl_msr.c b/drivers/powercap/intel_rapl_msr.c index c19e69e77093..8435d5358448 100644 --- a/drivers/powercap/intel_rapl_msr.c +++ b/drivers/powercap/intel_rapl_msr.c @@ -136,9 +136,9 @@ static int rapl_msr_write_raw(int cpu, struct reg_action *ra)
/* List of verified CPUs. */ static const struct x86_cpu_id pl4_support_ids[] = { - { X86_VENDOR_INTEL, 6, INTEL_FAM6_TIGERLAKE_L, X86_FEATURE_ANY }, - { X86_VENDOR_INTEL, 6, INTEL_FAM6_ALDERLAKE, X86_FEATURE_ANY }, - { X86_VENDOR_INTEL, 6, INTEL_FAM6_ALDERLAKE_L, X86_FEATURE_ANY }, + X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE_L, NULL), + X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE, NULL), + X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_L, NULL), {} };