[PATCH 0/9] Add CPU-type to topology

Pawan Gupta
2024-06-17T09:11:21Z

Hi,

This series adds support for CPU-type (CPUID.1A.EAX[31-24] on Intel) to
differentiate between hybrid variants P+E, P-only, E-only that share the
same Family/Model/Stepping. One of the use case for CPU-type is the
affected CPU table for CPU vulnerabilities, which can now use the CPU-type
to filter the unaffected variants.

* Patch 1 adds cpu-type to CPU topology structure and introduces
topology_cpu_type() to get the CPU-type.

* Patch 2-4 replaces usages of get_this_hybrid_cpu_type() with
topology_cpu_type().

* Patch 5-7 Updates CPU-matching infrastructure to use CPU-type.

* Patch 8 cleans up the affected CPU list.

* Patch 9 uses the CPU-type to exclude P-only parts from the RFDS affected
list.

Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
---
Pawan Gupta (9):
x86/cpu/topology: Add x86_cpu_type to struct cpuinfo_topology
cpufreq: intel_pstate: Use topology_cpu_type() to get cpu-type
perf/x86/intel: Use topology_cpu_type() to get cpu-type
x86/cpu: Remove get_this_hybrid_cpu_type()
x86/cpu: Name CPU matching macro more generically (and shorten)
x86/cpu: Add cpu_type to struct x86_cpu_id
x86/cpu: Update x86_match_cpu() to also use cpu-type
x86/bugs: Declutter vulnerable CPU list
x86/rfds: Exclude P-only parts from the RFDS affected list

.../admin-guide/hw-vuln/reg-file-data-sampling.rst | 8 --
arch/x86/events/intel/core.c | 2 +-
arch/x86/include/asm/cpu.h | 6 -
arch/x86/include/asm/cpu_device_id.h | 117 +++++++-----------
arch/x86/include/asm/processor.h | 3 +
arch/x86/include/asm/topology.h | 9 ++
arch/x86/kernel/cpu/common.c | 136 +++++++++++----------
arch/x86/kernel/cpu/debugfs.c | 1 +
arch/x86/kernel/cpu/intel.c | 16 ---
arch/x86/kernel/cpu/match.c | 22 ++++
arch/x86/kernel/cpu/topology_common.c | 9 ++
drivers/cpufreq/intel_pstate.c | 14 +--
include/linux/mod_devicetable.h | 2 +
13 files changed, 166 insertions(+), 179 deletions(-)
---
base-commit: 83a7eefedc9b56fe7bfeff13b6c7356688ffa670
change-id: 20240617-add-cpu-type-4d5e47efc117

Best regards,
--
Thanks,
Pawan