linux-kernel - Re: [PATCH] KVM: arm64: Change default caching mode for {PEND, PROP}BASER.outer

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Message-Id: <159397301833.254690.3043556347352831821.b4-ty@kernel.org>
Date:   Sun,  5 Jul 2020 19:18:03 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Alexander Graf <graf@...zon.com>, kvmarm@...ts.cs.columbia.edu
Cc:     kernel-team@...roid.com, James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: arm64: Change default caching mode for {PEND, PROP}BASER.outer

On Wed, 1 Jul 2020 16:02:06 +0200, Alexander Graf wrote:
> PENDBASER and PROPBASER define the outer caching mode for LPI tables.
> The memory backing them may not be outer sharable, so we mark them as nC
> by default. This however, breaks Windows on ARM which only accepts
> SameAsInner or RaWaWb as values for outer cachability.
> 
> We do today already allow the outer mode to be set to SameAsInner
> explicitly, so the easy fix is to default to that instead of nC for
> situations when an OS asks for a not fulfillable cachability request.
> 
> [...]

Applied to kvm-arm64/next-5.9, thanks!

[1/1] KVM: arm64: vgic-its: Change default outer cacheability for {PEND, PROP}BASER
      commit: 731532176716e2775a5d21115bb9c5c61e0cb704

Cheers,

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