From: David Woodhouse <dwmw2@infradead.org>
To: seanjc@google.com
Cc: kas@kernel.org, rick.p.edgecombe@intel.com, pbonzini@redhat.com,
kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org,
decui@microsoft.com, longli@microsoft.com,
ajay.kaher@broadcom.com, alexey.makhalov@broadcom.com,
jan.kiszka@siemens.com, dave.hansen@linux.intel.com,
luto@kernel.org, peterz@infradead.org, jgross@suse.com,
daniel.lezcano@kernel.org, tglx@kernel.org, jstultz@google.com,
x86@kernel.org, linux-coco@lists.linux.dev, kvm@vger.kernel.org,
linux-hyperv@vger.kernel.org, virtualization@lists.linux.dev,
linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org
Subject: Re: [PATCH v6 02/51] x86/apic: Add CONFIG_X86_LOCAL_APIC=n stubs for APIC timer frequency APIs
Date: Sat, 08 Aug 2026 11:37:16 +0100 [thread overview]
Message-ID: <3203fdfd32780c24eb084b6210ecbb6757ffde4d.camel@infradead.org> (raw)
In-Reply-To: <20260806233609.212337-3-seanjc@google.com>
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On Thu, 2026-08-06 at 16:35 -0700, Sean Christopherson wrote:
> Add stubs for the apic_set_timer_frequency_{,k}hz() APIs when the kernel is
> built without support for a local APIC, and drop #ifdefs in callers that
> don't need to check CONFIG_X86_LOCAL_APIC for other reasons.
>
> No functional change intended.
>
> Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
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next prev parent reply other threads:[~2026-08-08 10:37 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-06 23:35 [PATCH v6 00/51] x86: Try to wrangle PV clocks vs. TSC Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 01/51] x86/apic: Provide helpers to set local APIC timer frequency in hz and khz Sean Christopherson
2026-08-08 10:36 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 02/51] x86/apic: Add CONFIG_X86_LOCAL_APIC=n stubs for APIC timer frequency APIs Sean Christopherson
2026-08-08 10:37 ` David Woodhouse [this message]
2026-08-06 23:35 ` [PATCH v6 03/51] x86/tsc: Ensure that TSC recalibration doesn't run if TSC frequency is known Sean Christopherson
2026-08-06 23:55 ` sashiko-bot
2026-08-06 23:35 ` [PATCH v6 04/51] x86/tsc: Restrict recalibrate_cpu_khz() export to p4-clockmod and powernow-k7 Sean Christopherson
2026-08-08 14:39 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 05/51] x86/sev: Mark TSC as reliable when configuring Secure TSC Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 06/51] x86/sev: Don't override CPU frequency calibration for SNP's " Sean Christopherson
2026-08-06 23:55 ` sashiko-bot
2026-08-08 14:48 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 07/51] x86/sev: Move check for SNP Secure TSC support to tsc_early_init() Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 08/51] x86/sev: Shove SNP's secure/trusted TSC frequency directly into "calibration" Sean Christopherson
2026-08-08 14:50 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 09/51] x86/tsc: Add a standalone helper for getting TSC info from CPUID.0x15 Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 10/51] x86/tdx: Force TSC frequency with CPUID-based info provided by the TDX-Module Sean Christopherson
2026-08-08 14:53 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 11/51] x86/tsc: Add dedicated hypervisor hooks for getting known TSC/CPU frequencies Sean Christopherson
2026-08-08 14:55 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 12/51] x86/acrn: Register TSC/CPU frequency callbacks iff frequency is actually in CPUID Sean Christopherson
2026-08-08 14:57 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 13/51] x86/acrn: Mark TSC frequency as known when using ACRN for calibration Sean Christopherson
2026-08-08 14:59 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 14/51] x86/tsc: Consolidate forcing of X86_FEATURE_TSC_KNOWN_FREQ for PV code Sean Christopherson
2026-08-08 15:00 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 15/51] x86/tsc: Kill off x86_platform_ops.calibrate_{cpu,tsc}() hooks Sean Christopherson
2026-08-08 15:01 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 16/51] x86/tsc: Rename pit_hpet_ptimer_calibrate_cpu() => native_calibrate_cpu_late() Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 17/51] x86/tsc: Fold native_calibrate_cpu() into recalibrate_cpu_khz() Sean Christopherson
2026-08-08 15:03 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 18/51] x86/kvmclock: Rename kvm_get_tsc_khz() to kvmclock_get_tsc_khz() Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 19/51] x86/kvmclock: Drop dead check on TSC being unstable during kvmclock_init() Sean Christopherson
2026-08-08 15:05 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 20/51] KVM: x86: Officially define CPUID 0x40000010 as PV Timing Info (TSC and Bus) Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 21/51] x86/kvm: Obtain TSC frequency from PV CPUID if present Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 22/51] x86/kvm: Mark TSC as reliable when it's constant and nonstop Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 23/51] x86/tsc: Add standalone helper for getting CPU frequency from CPUID Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 24/51] x86/kvm: Get CPU base frequency from CPUID when it's available Sean Christopherson
2026-08-07 0:04 ` sashiko-bot
2026-08-08 15:06 ` David Woodhouse
2026-08-06 23:35 ` [PATCH v6 25/51] clocksource: hyper-v: Register sched_clock save/restore iff it's necessary Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 26/51] clocksource: hyper-v: Drop wrappers to sched_clock save/restore helpers Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 27/51] clocksource: hyper-v: Don't save/restore TSC offset when using HV sched_clock Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 28/51] x86/kvmclock: Setup kvmclock for secondary CPUs iff CONFIG_SMP=y Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 29/51] x86/kvm: Don't disable kvmclock on BSP in syscore_suspend() Sean Christopherson
2026-08-07 0:04 ` sashiko-bot
2026-08-06 23:35 ` [PATCH v6 30/51] x86/paravirt: Remove unnecessary PARAVIRT=n stub for paravirt_set_sched_clock() Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 31/51] x86/paravirt: Move handling of unstable PV clocks into paravirt_set_sched_clock() Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 32/51] x86/kvmclock: Move sched_clock save/restore helpers up in kvmclock.c Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 33/51] x86/xen/time: NOP-ify x86_platform's sched_clock save/restore hooks Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 34/51] x86/vmware: NOP-ify save/restore hooks when using VMware's sched_clock Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 35/51] x86/tsc: WARN if TSC sched_clock save/restore used with PV sched_clock Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 36/51] x86/paravirt: Pass sched_clock save/restore helpers during registration Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 37/51] x86/kvmclock: Move kvm_sched_clock_init() down in kvmclock.c Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 38/51] x86/xen/time: Mark xen_setup_vsyscall_time_info() as __init Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 39/51] x86/pvclock: Mark setup helpers and related various as __init/__ro_after_init Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 40/51] x86/pvclock: WARN if pvclock's valid_flags are overwritten Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 41/51] x86/kvmclock: Refactor handling of PVCLOCK_TSC_STABLE_BIT during kvmclock_init() Sean Christopherson
2026-08-06 23:35 ` [PATCH v6 42/51] timekeeping: Resume clocksources before reading persistent clock Sean Christopherson
2026-08-06 23:36 ` [PATCH v6 43/51] x86/kvmclock: Hook clocksource.suspend/resume when kvmclock isn't sched_clock Sean Christopherson
2026-08-06 23:36 ` [PATCH v6 44/51] x86/kvmclock: WARN if wall clock is read while kvmclock is suspended Sean Christopherson
2026-08-06 23:36 ` [PATCH v6 45/51] x86/paravirt: Mark __paravirt_set_sched_clock() as __init Sean Christopherson
2026-08-06 23:36 ` [PATCH v6 46/51] x86/paravirt: Plumb a return code into __paravirt_set_sched_clock() Sean Christopherson
2026-08-06 23:36 ` [PATCH v6 47/51] x86/paravirt: Don't use a PV sched_clock in CoCo guests with trusted TSC Sean Christopherson
2026-08-06 23:36 ` [PATCH v6 48/51] x86/kvmclock: Use TSC for sched_clock if it's constant and non-stop Sean Christopherson
2026-08-06 23:36 ` [PATCH v6 49/51] x86/kvmclock: Plumb in AP-online and BSP-resume to kvmlock, for documentation Sean Christopherson
2026-08-06 23:36 ` [PATCH v6 50/51] x86/paravirt: Move using_native_sched_clock() stub into timer.h Sean Christopherson
2026-08-06 23:36 ` [PATCH v6 51/51] x86/kvm: Get local APIC bus frequency from PV CPUID Timing Info Sean Christopherson
2026-08-07 0:08 ` sashiko-bot
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