Re: [PATCH v10 00/21] KVM: x86: Cleaning up the KVM clock mess, part 1

[Sean Christopherson]

On Wed, 26 Aug 2026 14:32:40 -0700, Sean Christopherson wrote:
> Part 1 of David's series to clean up the host-side mess of kvmclock.  The cut
> point in this version is still quite arbitrary, but what's left for "part 2"
> fits nicely into 2-3 buckets:
> 
>   1: Masterclock overhaul
>   2. New uAPI and tests
> 
> [...]

Applied to kvm-x86 clocks, thanks!

[01/21] KVM: x86: Update "last guest TSC" snapshot prior to enabling IRQs/preemption
        https://github.com/kvm-x86/linux/commit/ba78382f34c1
[02/21] KVM: x86: Improve accuracy of KVM clock when TSC scaling is in force
        https://github.com/kvm-x86/linux/commit/d4f54ed48e00
[03/21] KVM: x86: Explicitly disable TSC scaling without CONSTANT_TSC
        https://github.com/kvm-x86/linux/commit/dd0a8675f4ba
[04/21] KVM: x86: Activate master clock immediately on vCPU creation
        https://github.com/kvm-x86/linux/commit/7254e09bb5e9
[05/21] KVM: x86: Compute kvmclock base without pvclock_gtod_data
        https://github.com/kvm-x86/linux/commit/7ffdb9d111c3
[06/21] KVM: x86: Avoid NTP frequency skew for KVM clock on 32-bit host
        https://github.com/kvm-x86/linux/commit/4c710e8182f4
[07/21] KVM: x86: Drop unnecessary CPU pinning when computing/getting kvmclock
        https://github.com/kvm-x86/linux/commit/796b73bba577
[08/21] KVM: x86: Move "no master clock" fallback from __get_kvmclock() to get_kvmclock()
        https://github.com/kvm-x86/linux/commit/1a926fb39304
[09/21] KVM: x86: Wrap all of __get_kvmclock_master_clock() with CONFIG_X86_64=y
        https://github.com/kvm-x86/linux/commit/8e7e24b88e26
[10/21] KVM: x86: Fall back to non-master-clock if clockread fails in get_kvmclock()
        https://github.com/kvm-x86/linux/commit/25f75fb43fd5
[11/21] KVM: x86: Fix KVM clock precision in get_kvmclock() with TSC scaling
        https://github.com/kvm-x86/linux/commit/abdef42276d8
[12/21] KVM: x86: Use get_kvmclock() in kvm_get_wall_clock_epoch()
        https://github.com/kvm-x86/linux/commit/c56419275caa
[13/21] KVM: x86: Fix compute_guest_tsc() to handle negative time deltas
        https://github.com/kvm-x86/linux/commit/d9173f59df3a
[14/21] KVM: x86: Disable preemption, not IRQs, when getting TSC+freq pair
        https://github.com/kvm-x86/linux/commit/917a53a4b461
[15/21] KVM: x86: Make master clock logic in guest PV clock updates 64-bit only
        https://github.com/kvm-x86/linux/commit/f21b04302404
[16/21] KVM: x86: Upscale TSC to "now", not master clock when updating PV clocks
        https://github.com/kvm-x86/linux/commit/92fac63cc739
[17/21] KVM: x86: Simplify and comment kvm_get_time_scale()
        https://github.com/kvm-x86/linux/commit/2918af628d0d
[18/21] KVM: x86: Remove implicit rdtsc() from kvm_compute_l1_tsc_offset()
        https://github.com/kvm-x86/linux/commit/d4bbf2a8eb82
[19/21] KVM: x86: Use kernel timekeeping snapshots for getting kvmclock time since boot
        https://github.com/kvm-x86/linux/commit/ef7d809987c9
[20/21] KVM: x86: Use kernel timekeeping snapshot for monotonic clock
        https://github.com/kvm-x86/linux/commit/0a0ab23b05f0
[21/21] KVM: x86: Use kernel timekeeping snapshot to get walltime+TSC
        https://github.com/kvm-x86/linux/commit/d7841275e1fb

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https://github.com/kvm-x86/linux/tree/next