linux-kernel - Re: [PATCH v4 16/21] arm64: Make kvm-arm.mode={nvhe,protected} an alias of id

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Message-ID: <YAwvi9zEXZxbo9iK@Catalins-MacBook-Air.local>
Date:   Sat, 23 Jan 2021 14:15:39 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     Marc Zyngier <maz@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-kernel@...r.kernel.org, Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        David Brazdil <dbrazdil@...gle.com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Jing Zhang <jingzhangos@...gle.com>,
        Ajay Patil <pajay@....qualcomm.com>,
        Prasad Sodagudi <psodagud@...eaurora.org>,
        Srinivas Ramana <sramana@...eaurora.org>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        kernel-team@...roid.com
Subject: Re: [PATCH v4 16/21] arm64: Make kvm-arm.mode={nvhe,protected} an
 alias of id_aa64mmfr1.vh=0

On Mon, Jan 18, 2021 at 09:45:28AM +0000, Marc Zyngier wrote:
> Admitedly, passing id_aa64mmfr1.vh=0 on the command-line isn't
> that easy to understand, and it is likely that users would much
> prefer write "kvm-arm.mode=nvhe", or "...=protected".
> 
> So here you go. This has the added advantage that we can now
> always honor the "kvm-arm.mode=protected" option, even when
> booting on a VHE system.
> 
> Signed-off-by: Marc Zyngier <maz@...nel.org>

Acked-by: Catalin Marinas <catalin.marinas@....com>