From: Stephen Boyd <swboyd@chromium.org>
To: Marc Zyngier <maz@kernel.org>,
Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Cc: 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: Thu, 17 Oct 2019 13:00:39 -0700 [thread overview]
Message-ID: <5da8c868.1c69fb81.ae709.97ff@mx.google.com> (raw)
In-Reply-To: <ac7599b30461d6a814e4f36d68bba6c2@codeaurora.org>
Quoting Sai Prakash Ranjan (2019-10-11 06:40:13)
> On 2019-10-11 19:04, Marc Zyngier wrote:
> > On Fri, 11 Oct 2019 18:47:39 +0530
> > Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> wrote:
> >
> >> Hi Mark,
> >>
> >> Thanks a lot for the detailed explanations, I did have a look at all
> >> the variations before posting this.
> >>
> >> On 2019-10-11 16:20, Mark Rutland wrote:
> >> > Hi,
> >> >
> >> > On Fri, Oct 11, 2019 at 11:19:00AM +0530, Sai Prakash Ranjan wrote:
> >> >> On latest QCOM SoCs like SM8150 and SC7180 with big.LITTLE arch, below
> >> >> warnings are observed during bootup of big cpu cores.
> >> >
> >> > For reference, which CPUs are in those SoCs?
> >> >
> >>
> >> SM8150 is based on Cortex-A55(little cores) and Cortex-A76(big cores).
> >> I'm afraid I cannot give details about SC7180 yet.
> >>
> >> >> SM8150:
> >> >> >> [ 0.271177] CPU features: SANITY CHECK: Unexpected variation in
> >> >> SYS_ID_AA64PFR0_EL1. Boot CPU: 0x00000011112222, CPU4: >> 0x00000011111112
> >> >
> >> > The differing fields are EL3, EL2, and EL1: the boot CPU supports
> >> > AArch64 and AArch32 at those exception levels, while the secondary only
> >> > supports AArch64.
> >> >
> >> > Do we handle this variation in KVM?
> >>
> >> We do not support KVM.
> >
> > Mainline does. You don't get to pick and choose what is supported or
> > not.
> >
>
> Ok thats good.
>
I want KVM on sc7180. How do I get it? Is something going to not work?
next prev parent reply other threads:[~2019-10-17 20:00 UTC|newest]
Thread overview: 20+ 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 9:19 ` Marc Gonzalez
2019-10-11 9:57 ` Sai Prakash Ranjan
2019-10-11 10:50 ` Mark Rutland
2019-10-11 11:09 ` Marc Gonzalez
2019-10-11 13:33 ` Sai Prakash Ranjan
2019-10-11 13:17 ` Sai Prakash Ranjan
2019-10-11 13:34 ` Marc Zyngier
2019-10-11 13:40 ` Sai Prakash Ranjan
2019-10-17 20:00 ` Stephen Boyd [this message]
2019-10-18 7:20 ` Marc Zyngier
2019-10-18 14:33 ` Stephen Boyd
2019-10-18 16:40 ` Marc Zyngier
2019-10-18 10:18 ` Sai Prakash Ranjan
2019-10-11 13:33 ` Marc Zyngier
2019-10-11 13:54 ` Mark Rutland
2019-10-11 14:06 ` Marc Zyngier
2019-10-17 21:39 ` Jeremy Linton
2019-10-18 9:01 ` Catalin Marinas
2020-01-20 2:47 ` Sai Prakash Ranjan
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