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From: Vladimir Murzin <vladimir.murzin@arm.com>
To: Marc Zyngier <maz@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: Anders Berg <anders.berg@lsi.com>,
	Russell King <linux@arm.linux.org.uk>,
	Arnd Bergmann <arnd@arndb.de>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Will Deacon <will@kernel.org>
Subject: Re: [RFC PATCH 0/5] Removing support for 32bit KVM/arm host
Date: Tue, 11 Feb 2020 15:12:53 +0000
Message-ID: <fee903cf-0c21-da4b-aafc-1539b0a0163d@arm.com> (raw)
In-Reply-To: <20200210141324.21090-1-maz@kernel.org>

On 2/10/20 2:13 PM, Marc Zyngier wrote:
> KVM/arm was merged just over 7 years ago, and has lived a very quiet
> life so far. It mostly works if you're prepared to deal with its
> limitations, it has been a good prototype for the arm64 version,
> but it suffers a few problems:
> 
> - It is incomplete (no debug support, no PMU)
> - It hasn't followed any of the architectural evolutions
> - It has zero users (I don't count myself here)
> - It is more and more getting in the way of new arm64 developments
> 
> So here it is: unless someone screams and shows that they rely on
> KVM/arm to be maintained upsteam, I'll remove 32bit host support
> form the tree. One of the reasons that makes me confident nobody is
> using it is that I never receive *any* bug report. Yes, it is perfect.
> But if you depend on KVM/arm being available in mainline, please shout.
> 
> To reiterate: 32bit guest support for arm64 stays, of course. Only
> 32bit host goes. Once this is merged, I plan to move virt/kvm/arm to
> arm64, and cleanup all the now unnecessary abstractions.
> 
> The patches have been generated with the -D option to avoid spamming
> everyone with huge diffs, and there is a kvm-arm/goodbye branch in
> my kernel.org repository.
> 
> Marc Zyngier (5):
>   arm: Unplug KVM from the build system
>   arm: Remove KVM from config files
>   arm: Remove 32bit KVM host support
>   arm: Remove HYP/Stage-2 page-table support
>   arm: Remove GICv3 vgic compatibility macros

Acked-by: Vladimir Murzin <vladimir.murzin@arm.com>
 

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Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20200210141344eucas1p25a6da0b0251931ef3659397a6f34c0c3@eucas1p2.samsung.com>
2020-02-10 14:13 ` Marc Zyngier
2020-02-10 14:13   ` [RFC PATCH 1/5] arm: Unplug KVM from the build system Marc Zyngier
2020-02-10 14:13   ` [RFC PATCH 2/5] arm: Remove KVM from config files Marc Zyngier
2020-02-10 14:13   ` [RFC PATCH 3/5] arm: Remove 32bit KVM host support Marc Zyngier
2020-02-10 14:13   ` [RFC PATCH 4/5] arm: Remove HYP/Stage-2 page-table support Marc Zyngier
2020-02-10 14:13   ` [RFC PATCH 5/5] arm: Remove GICv3 vgic compatibility macros Marc Zyngier
2020-02-10 15:21   ` [RFC PATCH 0/5] Removing support for 32bit KVM/arm host Olof Johansson
2020-02-10 15:54     ` Arnd Bergmann
2020-02-10 15:46   ` Will Deacon
2020-02-10 16:25   ` Russell King - ARM Linux admin
2020-02-10 16:26     ` Russell King - ARM Linux admin
2020-02-11 15:12   ` Vladimir Murzin [this message]
2020-02-11 15:23   ` Catalin Marinas
2020-02-17  0:14   ` Linus Walleij
2020-02-19 13:53   ` Stefan Agner
2020-02-20 11:01     ` Marc Zyngier
2020-02-19 14:56   ` Christoffer Dall
2020-02-19 15:09   ` Arnd Bergmann
2020-02-19 15:46     ` Jan Kiszka
2020-02-20 10:29       ` Marc Zyngier
2020-02-20 12:44   ` Marek Szyprowski
2020-02-20 13:15     ` Marc Zyngier
2020-02-20 13:17       ` Paolo Bonzini
2020-02-20 13:32       ` Robin Murphy
2020-02-20 14:01         ` Marc Zyngier
2020-02-20 14:38           ` Robin Murphy
2020-02-22 14:21   ` Takashi Yoshi
2020-02-22 14:40   ` Takashi Yoshi
2020-02-22 21:31     ` Arnd Bergmann
2020-02-25 21:34       ` Takashi Yoshi

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