WSL2-Linux-Kernel/arch/x86
Ricardo Neri 250b3c0d79 x86/cpu: Add helper function to get the type of the current hybrid CPU
On processors with Intel Hybrid Technology (i.e., one having more than
one type of CPU in the same package), all CPUs support the same
instruction set and enumerate the same features on CPUID. Thus, all
software can run on any CPU without restrictions. However, there may be
model-specific differences among types of CPUs. For instance, each type
of CPU may support a different number of performance counters. Also,
machine check error banks may be wired differently. Even though most
software will not care about these differences, kernel subsystems
dealing with these differences must know.

Add and expose a new helper function get_this_hybrid_cpu_type() to query
the type of the current hybrid CPU. The function will be used later in
the perf subsystem.

The Intel Software Developer's Manual defines the CPU type as 8-bit
identifier.

Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Len Brown <len.brown@intel.com>
Acked-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/1618237865-33448-3-git-send-email-kan.liang@linux.intel.com
2021-04-19 20:03:23 +02:00
..
boot EFI updates collected by Ard Biesheuvel: 2020-12-24 12:40:07 -08:00
configs module: remove EXPORT_UNUSED_SYMBOL* 2021-02-08 12:28:07 +01:00
crypto crypto: aesni - release FPU during skcipher walk API calls 2021-01-22 14:58:04 +11:00
entry x86/sev-es: Introduce ip_within_syscall_gap() helper 2021-03-08 14:22:17 +01:00
events perf/amd/uncore: Fix sysfs type mismatch 2021-04-16 18:58:52 +02:00
hyperv iommu/hyperv: setup an IO-APIC IRQ remapping domain for root partition 2021-02-11 08:47:07 +00:00
ia32 x86/ia32_signal: Propagate __user annotation properly 2020-12-11 19:44:31 +01:00
include x86/cpu: Add helper function to get the type of the current hybrid CPU 2021-04-19 20:03:23 +02:00
kernel x86/cpu: Add helper function to get the type of the current hybrid CPU 2021-04-19 20:03:23 +02:00
kvm - Make sure PMU internal buffers are flushed for per-CPU events too and 2021-03-14 12:57:17 -07:00
lib x86/sev-es: Use __copy_from_user_inatomic() 2021-03-09 12:37:54 +01:00
math-emu treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
mm x86: fix seq_file iteration for pat/memtype.c 2021-02-26 09:41:05 -08:00
net bpf, x86: Fix BPF_FETCH atomic and/or/xor with r0 as src 2021-02-22 18:03:11 +01:00
pci Simple Firmware Interface (SFI) support removal for v5.12-rc1 2021-02-24 10:35:29 -08:00
platform Simple Firmware Interface (SFI) support removal for v5.12-rc1 2021-02-24 10:35:29 -08:00
power clang-lto for v5.12-rc1 (part2) 2021-02-23 15:13:45 -08:00
purgatory crypto: sha - split sha.h into sha1.h and sha2.h 2020-11-20 14:45:33 +11:00
ras treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
realmode x86/head/64: Don't call verify_cpu() on starting APs 2020-09-09 11:33:20 +02:00
tools Modules updates for v5.12 2021-02-23 10:15:33 -08:00
um um: remove process stub VMA 2021-02-12 21:37:38 +01:00
video
xen xen: branch for v5.12-rc3 2021-03-12 11:34:36 -08:00
.gitignore
Kbuild
Kconfig x86, kfence: enable KFENCE for x86 2021-02-26 09:41:02 -08:00
Kconfig.assembler
Kconfig.cpu treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Kconfig.debug x86, libnvdimm/test: Remove COPY_MC_TEST 2020-10-26 18:08:35 +01:00
Makefile clang-lto for v5.12-rc1 (part2) 2021-02-23 15:13:45 -08:00
Makefile.um
Makefile_32.cpu