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From: Marc Zyngier <maz@kernel.org>
To: Stephen Boyd <swboyd@chromium.org>
Cc: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
	Mark Rutland <mark.rutland@arm.com>,
	rnayak@codeaurora.org, suzuki.poulose@arm.com,
	catalin.marinas@arm.com,
	linux-arm-kernel <linux-arm-kernel-bounces@lists.infradead.org>,
	linux-kernel@vger.kernel.org, jeremy.linton@arm.com,
	bjorn.andersson@linaro.org, linux-arm-msm@vger.kernel.org,
	andrew.murray@arm.com, will@kernel.org, dave.martin@arm.com,
	linux-arm-kernel@lists.infradead.org, marc.w.gonzalez@free.fr
Subject: Re: Relax CPU features sanity checking on heterogeneous architectures
Date: Fri, 18 Oct 2019 17:40:29 +0100	[thread overview]
Message-ID: <86h846ypky.wl-maz@kernel.org> (raw)
In-Reply-To: <5da9cd3a.1c69fb81.95e9.e5e2@mx.google.com>

On Fri, 18 Oct 2019 15:33:29 +0100,
Stephen Boyd <swboyd@chromium.org> wrote:
> 
> Quoting Marc Zyngier (2019-10-18 00:20:56)
> > 
> > If this SoC is anythinig like SM8150, 32bit guests will be hit and 
> > miss,
> > depending on the CPU your guest runs on, or is migrated to. We need to
> > either drop capabilities from the 32bit-capable CPU, or prevent the
> > non-32bit capable CPU from booting if a 32bit guest has been started.
> > 
> > You just have to hope that the kernel is entered at EL2, and that QC's
> > "value add" has been moved somewhere else...
> > 
> 
> Ok that's good.

I need a new signature.

	M.

-- 
Jazz is not dead, it just smells funny.

WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <maz@kernel.org>
To: Stephen Boyd <swboyd@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
	Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
	rnayak@codeaurora.org, suzuki.poulose@arm.com,
	catalin.marinas@arm.com,
	linux-arm-kernel <linux-arm-kernel-bounces@lists.infradead.org>,
	marc.w.gonzalez@free.fr, linux-kernel@vger.kernel.org,
	jeremy.linton@arm.com, bjorn.andersson@linaro.org,
	linux-arm-msm@vger.kernel.org, andrew.murray@arm.com,
	will@kernel.org, dave.martin@arm.com,
	linux-arm-kernel@lists.infradead.org
Subject: Re: Relax CPU features sanity checking on heterogeneous architectures
Date: Fri, 18 Oct 2019 17:40:29 +0100	[thread overview]
Message-ID: <86h846ypky.wl-maz@kernel.org> (raw)
In-Reply-To: <5da9cd3a.1c69fb81.95e9.e5e2@mx.google.com>

On Fri, 18 Oct 2019 15:33:29 +0100,
Stephen Boyd <swboyd@chromium.org> wrote:
> 
> Quoting Marc Zyngier (2019-10-18 00:20:56)
> > 
> > If this SoC is anythinig like SM8150, 32bit guests will be hit and 
> > miss,
> > depending on the CPU your guest runs on, or is migrated to. We need to
> > either drop capabilities from the 32bit-capable CPU, or prevent the
> > non-32bit capable CPU from booting if a 32bit guest has been started.
> > 
> > You just have to hope that the kernel is entered at EL2, and that QC's
> > "value add" has been moved somewhere else...
> > 
> 
> Ok that's good.

I need a new signature.

	M.

-- 
Jazz is not dead, it just smells funny.

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2019-10-18 16:40 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-11  5:49 Relax CPU features sanity checking on heterogeneous architectures Sai Prakash Ranjan
2019-10-11  5:49 ` Sai Prakash Ranjan
2019-10-11  9:19 ` Marc Gonzalez
2019-10-11  9:19   ` Marc Gonzalez
2019-10-11  9:57   ` Sai Prakash Ranjan
2019-10-11  9:57     ` Sai Prakash Ranjan
2019-10-11 10:50 ` Mark Rutland
2019-10-11 10:50   ` Mark Rutland
2019-10-11 11:09   ` Marc Gonzalez
2019-10-11 11:09     ` Marc Gonzalez
2019-10-11 13:33     ` Sai Prakash Ranjan
2019-10-11 13:33       ` Sai Prakash Ranjan
2019-10-11 13:17   ` Sai Prakash Ranjan
2019-10-11 13:17     ` Sai Prakash Ranjan
2019-10-11 13:34     ` Marc Zyngier
2019-10-11 13:34       ` Marc Zyngier
2019-10-11 13:40       ` Sai Prakash Ranjan
2019-10-11 13:40         ` Sai Prakash Ranjan
2019-10-17 20:00         ` Stephen Boyd
2019-10-17 20:00           ` Stephen Boyd
2019-10-18  7:20           ` Marc Zyngier
2019-10-18  7:20             ` Marc Zyngier
2019-10-18 14:33             ` Stephen Boyd
2019-10-18 14:33               ` Stephen Boyd
2019-10-18 16:40               ` Marc Zyngier [this message]
2019-10-18 16:40                 ` Marc Zyngier
2019-10-18 10:18           ` Sai Prakash Ranjan
2019-10-18 10:18             ` Sai Prakash Ranjan
2019-10-11 13:33   ` Marc Zyngier
2019-10-11 13:33     ` Marc Zyngier
2019-10-11 13:54     ` Mark Rutland
2019-10-11 13:54       ` Mark Rutland
2019-10-11 14:06       ` Marc Zyngier
2019-10-11 14:06         ` Marc Zyngier
2019-10-17 21:39       ` Jeremy Linton
2019-10-17 21:39         ` Jeremy Linton
2019-10-18  9:01         ` Catalin Marinas
2019-10-18  9:01           ` Catalin Marinas
2020-01-20  2:47       ` Sai Prakash Ranjan
2020-01-20  2:47         ` Sai Prakash Ranjan

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