From: Marc Zyngier <maz@kernel.org>
To: Jon Hunter <jonathanh@nvidia.com>
Cc: Sumit Gupta <sumitg@nvidia.com>,
treding@nvidia.com, krzysztof.kozlowski@linaro.org,
mark.rutland@arm.com, linux-kernel@vger.kernel.org,
linux-tegra@vger.kernel.org, amhetre@nvidia.com,
bbasu@nvidia.com
Subject: Re: [Patch] memory: tegra: Skip SID override from Guest VM
Date: Tue, 06 Feb 2024 12:54:48 +0000 [thread overview]
Message-ID: <86ttml69d3.wl-maz@kernel.org> (raw)
In-Reply-To: <c7e71e7e-ef01-4539-b481-9f4a95e6a444@nvidia.com>
On Tue, 06 Feb 2024 12:51:35 +0000,
Jon Hunter <jonathanh@nvidia.com> wrote:
>
>
> On 06/02/2024 12:28, Jon Hunter wrote:
>
> ...
>
> >> - My own tegra186 HW doesn't have VHE, since it is ARMv8.0, and this
> >> helper will always return 'false'. How could this result in
> >> something that still works? Can I get a free CPU upgrade?
> >
> > I thought this API just checks to see if we are in EL2?
>
>
> Sorry to add a bit more info, I see EL2 is used for hypervisor [0],
> but on my Tegra186 with no hypervisor I see ...
>
> CPU: All CPU(s) started at EL2
Yes. and yet the kernel runs at EL1 (on ARMv8.0, we can't run the
kernel at EL2 at all).
M.
--
Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2024-02-06 12:54 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-06 11:48 [Patch] memory: tegra: Skip SID override from Guest VM Sumit Gupta
2024-02-06 12:00 ` Krzysztof Kozlowski
2024-02-06 12:08 ` Mark Rutland
2024-02-06 12:17 ` Marc Zyngier
2024-02-06 12:28 ` Jon Hunter
2024-02-06 12:51 ` Jon Hunter
2024-02-06 12:54 ` Marc Zyngier [this message]
2024-02-06 12:53 ` Marc Zyngier
2024-02-06 14:07 ` Thierry Reding
2024-02-06 14:54 ` Marc Zyngier
2024-02-06 17:08 ` Thierry Reding
2024-02-07 12:03 ` Marc Zyngier
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