linux-kernel - Re: [RFC PATCH 0/5] KVM: arm64: Add pvtime LPT support

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Message-ID: <20200825125230.GA33677@C02TD0UTHF1T.local>
Date:   Tue, 25 Aug 2020 13:52:30 +0100
From:   Mark Rutland <mark.rutland@....com>
To:     Steven Price <steven.price@....com>
Cc:     Marc Zyngier <maz@...nel.org>, Keqian Zhu <zhukeqian1@...wei.com>,
        kvm@...r.kernel.org, Catalin Marinas <catalin.marinas@....com>,
        linux-kernel@...r.kernel.org, Will Deacon <will@...nel.org>,
        kvmarm@...ts.cs.columbia.edu, linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC PATCH 0/5] KVM: arm64: Add pvtime LPT support

On Wed, Aug 19, 2020 at 09:54:40AM +0100, Steven Price wrote:
> On 18/08/2020 15:41, Marc Zyngier wrote:
> > On 2020-08-17 09:41, Keqian Zhu wrote:

> We are discussing (re-)releasing the spec with the LPT parts added. If you
> have fundamental objections then please me know.

Like Marc, I argued strongly for the removal of the LPT bits on the
premise that it didn't really work (e.g. when transistioning between SW
agents) and so it was a pure maintenance burden.

I don't think the technical arguments have changed, and I don't think
it's a good idea to try to ressurect this. Please rope me in if
this comes up in internal discussions.

Mark.