linux-kernel - Re: [PATCH v4 0/4] kvm/arm: New VMID allocator based on asid

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Message-Id: <164434147328.3931943.1270605694385749340.b4-ty@kernel.org>
Date:   Tue,  8 Feb 2022 17:37:27 +0000
From:   Marc Zyngier <maz@...nel.org>
To:     kvmarm@...ts.cs.columbia.edu, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>
Cc:     will@...nel.org, jonathan.cameron@...wei.com,
        Alexandru.Elisei@....com, catalin.marinas@....com,
        linuxarm@...wei.com, jean-philippe@...aro.org, qperret@...gle.com,
        julien.thierry.kdev@...il.com, suzuki.poulose@....com,
        james.morse@....com
Subject: Re: [PATCH v4 0/4] kvm/arm: New VMID allocator based on asid

On Mon, 22 Nov 2021 12:18:40 +0000, Shameer Kolothum wrote:
> Changes from v3:
> - Main change is in patch #4, where the VMID is now set to an
>   invalid one on vCPU schedule out. Introduced an
>   INVALID_ACTIVE_VMID which is basically a VMID 0 with generation 1.
>   Since the basic allocator algorithm reserves vmid #0, it is never
>   used as an active VMID. This (hopefully) will fix the issue of
>   unnecessarily reserving VMID space with active_vmids when those
>   VMs are no longer active[0] and at the same time address the
>   problem noted in v3 wherein everything ends up in slow-path[1].
> 
> [...]

Applied to next, thanks!

[1/4] KVM: arm64: Introduce a new VMID allocator for KVM
      commit: 417838392f2e657ee25cc30e373ff4c35a0faa90
[2/4] KVM: arm64: Make VMID bits accessible outside of allocator
      commit: f8051e960922a9de8e42159103d5d9c697ef17ec
[3/4] KVM: arm64: Align the VMID allocation with the arm64 ASID
      commit: 3248136b3637e1671e4fa46e32e2122f9ec4bc3d
[4/4] KVM: arm64: Make active_vmids invalid on vCPU schedule out
      commit: 100b4f092f878dc379f1fcef9ce567c25dee3473

Cheers,

	M.
-- 
Without deviation from the norm, progress is not possible.