[PATCH 0/8] x86/msr: Drop 32-bit variants of *_on_cpu() MSR functions

From: Juergen Gross

Date: Fri Jun 05 2026 - 03:22:51 EST


Drop the variants using 2 32-bit values instead of a single 64-bit one
of the *_on_cpu() MSR access functions.

Juergen Gross (8):
x86/msr: Switch rdmsr_on_cpu() to return a 64-bit quantity
x86/msr: Switch all callers of rdmsrq_on_cpu() to use rdmsr_on_cpu()
x86/msr: Switch wrmsr_on_cpu() to use a 64-bit quantity
x86/msr: Switch all callers of wrmsrq_on_cpu() to use wrmsr_on_cpu()
x86/msr: Switch rdmsr_safe_on_cpu() to return a 64-bit quantity
x86/msr: Switch all callers of rdmsrq_safe_on_cpu() to use
rdmsr_safe_on_cpu()
x86/msr: Switch wrmsr_safe_on_cpu() to use a 64-bit quantity
x86/msr: Switch all callers of wrmsrq_safe_on_cpu() to use
wrmsr_safe_on_cpu()

arch/x86/events/intel/ds.c | 11 +--
arch/x86/events/intel/pt.c | 2 +-
arch/x86/events/intel/uncore_discovery.c | 2 +-
arch/x86/events/intel/uncore_snbep.c | 2 +-
arch/x86/include/asm/msr.h | 44 +++--------
arch/x86/kernel/acpi/cppc.c | 8 +-
arch/x86/kernel/cpu/intel_epb.c | 8 +-
arch/x86/kernel/cpu/mce/amd.c | 6 +-
arch/x86/kernel/cpu/mce/inject.c | 12 +--
arch/x86/kernel/cpu/microcode/intel.c | 2 +-
arch/x86/kernel/msr.c | 8 +-
arch/x86/lib/msr-smp.c | 79 ++-----------------
drivers/cpufreq/acpi-cpufreq.c | 4 +-
drivers/cpufreq/amd-pstate-ut.c | 2 +-
drivers/cpufreq/amd-pstate.c | 21 +++--
drivers/cpufreq/amd_freq_sensitivity.c | 4 +-
drivers/cpufreq/intel_pstate.c | 64 +++++++--------
drivers/cpufreq/p4-clockmod.c | 32 ++++----
drivers/cpufreq/speedstep-centrino.c | 27 ++++---
drivers/hwmon/coretemp.c | 44 +++++------
drivers/hwmon/via-cputemp.c | 16 ++--
drivers/platform/x86/amd/hfi/hfi.c | 4 +-
.../intel/speed_select_if/isst_if_common.c | 13 ++-
.../intel/uncore-frequency/uncore-frequency.c | 12 +--
drivers/powercap/intel_rapl_msr.c | 2 +-
drivers/thermal/intel/intel_tcc.c | 43 +++++-----
drivers/thermal/intel/x86_pkg_temp_thermal.c | 22 +++---
27 files changed, 203 insertions(+), 291 deletions(-)

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2.54.0