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 in pl4_support_ids as only this model is enumerated before this changeset. ] Signed-off-by: Ricardo Neri ricardo.neri-calderon@linux.intel.com --- I tested this backport on Tiger Lake and Meteor Lake systems. printk() tells me that the former is detected whereas the latter is not. The stepping and the feature fields in Tiger Lake are 0 as expected. --- drivers/powercap/intel_rapl_msr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/powercap/intel_rapl_msr.c b/drivers/powercap/intel_rapl_msr.c index 6b68e5ed2081..17692b234f42 100644 --- a/drivers/powercap/intel_rapl_msr.c +++ b/drivers/powercap/intel_rapl_msr.c @@ -126,7 +126,7 @@ 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_MATCH_INTEL_FAM6_MODEL(TIGERLAKE_L, NULL), {} };