linux-kernel - Re: [PATCH v8 0/5] x86/xen: pvclock vdso support

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Date:   Thu, 9 Nov 2017 15:21:36 -0500
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Joao Martins <joao.m.martins@...cle.com>,
        linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org
Cc:     Juergen Gross <jgross@...e.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Andy Lutomirski <luto@...capital.net>
Subject: Re: [PATCH v8 0/5] x86/xen: pvclock vdso support

On 11/08/2017 12:19 PM, Joao Martins wrote:
> Hey,
>
> This is take 8 for vdso for Xen. PVCLOCK_TSC_STABLE_BIT can be set starting Xen
>  4.8 which is required for vdso time related calls. In order to have it on, you
> need to have the hypervisor clocksource be TSC e.g. with the following boot
> params "clocksource=tsc tsc=stable:socket".
>
> Series is structured as following:
>
> Patch 1 probes for kvm guest in ptp_kvm in the event having
>         pvclock_pvti_cpu0_va() moved to common pvclock (on the next patch)
> Patch 2 streamlines pvti page get/set in pvclock for both of its users
> Patch 3,4 registers the pvti page on Xen and sets it in pvclock accordingly
> Patch 5 adds a file to KVM/Xen maintainers for tracking pvclock ABI changes.
>
> All patches appear to be Acked by its respective maintainers.
>
> The difference to v7 is adding the Acks on patches 1 and 2 plus the adjustment
> from Thomas to rename the getter function. (Changelog in individual patches)
>
> Thanks,
> Joao
>
> Joao Martins (5):
>   ptp_kvm: probe for kvm guest availability
>   x86/pvclock: add setter for pvclock_pvti_cpu0_va
>   x86/xen/time: set pvclock flags on xen_time_init()
>   x86/xen/time: setup vcpu 0 time info page
>   MAINTAINERS: xen, kvm: track pvclock-abi.h changes
>
>  MAINTAINERS                    |  2 +
>  arch/x86/entry/vdso/vma.c      |  2 +-
>  arch/x86/include/asm/pvclock.h | 19 +++++----
>  arch/x86/kernel/kvmclock.c     |  7 +--
>  arch/x86/kernel/pvclock.c      | 14 ++++++
>  arch/x86/xen/suspend.c         |  4 ++
>  arch/x86/xen/time.c            | 97 ++++++++++++++++++++++++++++++++++++++++++
>  arch/x86/xen/xen-ops.h         |  2 +
>  drivers/ptp/ptp_kvm.c          |  5 ++-
>  include/xen/interface/vcpu.h   | 42 ++++++++++++++++++
>  10 files changed, 177 insertions(+), 17 deletions(-)
>


Applied to for-linus-4.15.

-boris