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Message-ID: <20250508150240.172915-1-darwi@linutronix.de>
Date: Thu, 8 May 2025 17:02:29 +0200
From: "Ahmed S. Darwish" <darwi@...utronix.de>
To: Ingo Molnar <mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Andrew Cooper <andrew.cooper3@...rix.com>,
"H. Peter Anvin" <hpa@...or.com>,
John Ogness <john.ogness@...utronix.de>,
x86@...nel.org,
x86-cpuid@...ts.linux.dev,
LKML <linux-kernel@...r.kernel.org>,
"Ahmed S. Darwish" <darwi@...utronix.de>
Subject: [PATCH v1 0/9] x86/cpuid: Headers cleanup
Hi,
This is a CPUID headers cleanup series, on top of tip:x86/cpu. It is a
precursor for the upcoming v2 of the CPUID parser:
[PATCH v1 00/26] x86: Introduce centralized CPUID model
https://lore.kernel.org/lkml/20250506050437.10264-1-darwi@linutronix.de
as suggested by Ingo here:
https://lore.kernel.org/lkml/aBnSgu_JyEi8fvog@gmail.com
* Summary:
The current CPUID header structure is:
include/asm/
├── cpuid
│ ├── api.h
│ ├── leaf_0x2_api.h
│ └── types.h
└── cpuid.h
Simplify it into:
include/asm/
├── api.h
└── types.h
Standardize the CPUID header namespace by enforcing a "cpuid_" prefix for
all exported symbols. That is:
have_cpuid_p() ➤ cpuid_feature()
hypervisor_cpuid_base() ➤ cpuid_hypervisor_base()
native_cpuid() ➤ cpuid_native()
native_cpuid_REG() ➤ cpuid_native_REG()
Also rename:
cpuid_get_leaf_0x2_regs() ➤ cpuid_leaf_0x2()
for consistency with the other <asm/cpuid/api.h> accessors that return
full CPUID register output; i.e., cpuid_leaf() and cpuid_subleaf().
Finally, rename:
for_each_leaf_0x2_entry() ➤ for_each_cpuid_0x2_desc()
to include "cpuid" in the iterator name, and since what is being iterated
upon is CPUID(0x2) cache and TLB "descriptos", not "entries".
* Testing:
- Basic one-by-one allyesconfig compilation
- Comparison of a before/after of below files:
- /proc/cpuinfo
- /sys/devices/system/cpu/
- /sys/kernel/debug/x86/topo/
- dmesg --notime | grep 'Last level [id]TLB entries'
Thanks!
8<--
Ahmed S. Darwish (9):
x86/cpuid: Move CPUID(0x2) APIs into <cpuid/api.h>
x86/cpuid: Set <asm/cpuid/api.h> as the main CPUID header
x86/cpuid: Rename have_cpuid_p() to cpuid_feature()
x86/cpuid: Rename hypervisor_cpuid_base() to cpuid_hypervisor_base()
x86/cpuid: Rename cpuid_get_leaf_0x2_regs() to cpuid_leaf_0x2()
x86/cacheinfo: Rename CPUID(0x2) descriptors iterator parameter
x86/cpu: Rename CPUID(0x2) descriptors iterator parameter
x86/cpuid: Rename native_cpuid() to cpuid_native()
x86/cpuid: Rename native_cpuid_REG() to cpuid_native_REG()
arch/x86/boot/compressed/pgtable_64.c | 4 +-
arch/x86/boot/compressed/sev.c | 8 +-
arch/x86/coco/sev/core.c | 2 +-
arch/x86/events/intel/pt.c | 2 +-
arch/x86/include/asm/acrn.h | 2 +-
arch/x86/include/asm/cpuid.h | 9 --
arch/x86/include/asm/cpuid/api.h | 103 ++++++++++++++++++----
arch/x86/include/asm/cpuid/leaf_0x2_api.h | 73 ---------------
arch/x86/include/asm/cpuid/types.h | 3 +-
arch/x86/include/asm/microcode.h | 2 +-
arch/x86/include/asm/processor.h | 2 +-
arch/x86/include/asm/xen/hypervisor.h | 2 +-
arch/x86/kernel/acpi/cstate.c | 2 +-
arch/x86/kernel/amd_nb.c | 2 +-
arch/x86/kernel/cpu/cacheinfo.c | 18 ++--
arch/x86/kernel/cpu/common.c | 12 +--
arch/x86/kernel/cpu/intel.c | 16 ++--
arch/x86/kernel/cpu/microcode/amd.c | 2 +-
arch/x86/kernel/cpu/microcode/core.c | 8 +-
arch/x86/kernel/cpu/microcode/intel.c | 2 +-
arch/x86/kernel/cpu/microcode/internal.h | 4 +-
arch/x86/kernel/fpu/xstate.c | 2 +-
arch/x86/kernel/head32.c | 2 +-
arch/x86/kernel/hpet.c | 2 +-
arch/x86/kernel/jailhouse.c | 2 +-
arch/x86/kernel/kvm.c | 2 +-
arch/x86/kernel/paravirt.c | 2 +-
arch/x86/kernel/process.c | 2 +-
arch/x86/kernel/smpboot.c | 2 +-
arch/x86/kernel/tsc.c | 2 +-
arch/x86/kvm/cpuid.c | 4 +-
arch/x86/mm/mem_encrypt_identity.c | 6 +-
arch/x86/virt/svm/sev.c | 2 +-
arch/x86/xen/enlighten_pv.c | 6 +-
drivers/acpi/acpi_pad.c | 2 +-
drivers/dma/ioat/dca.c | 2 +-
drivers/firmware/efi/libstub/x86-5lvl.c | 4 +-
drivers/idle/intel_idle.c | 2 +-
drivers/platform/x86/intel/pmc/core.c | 2 +-
sound/soc/intel/avs/tgl.c | 2 +-
40 files changed, 159 insertions(+), 169 deletions(-)
delete mode 100644 arch/x86/include/asm/cpuid.h
delete mode 100644 arch/x86/include/asm/cpuid/leaf_0x2_api.h
base-commit: c1ab4ce3cb759f69fb9085a060e568b73e8f5cd8
--
2.49.0
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