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From: Oliver Upton <oliver.upton@linux.dev>
To: Marc Zyngier <maz@kernel.org>
Cc: Kristina Martsenko <kristina.martsenko@arm.com>,
	linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Zenghui Yu <yuzenghui@huawei.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Mark Brown <broonie@kernel.org>,
	Luis Machado <luis.machado@arm.com>,
	Vladimir Murzin <vladimir.murzin@arm.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 06/11] KVM: arm64: hide MOPS from guests
Message-ID: <ZH4DBoFv2CkoxFmX@linux.dev>
References: <20230509142235.3284028-1-kristina.martsenko@arm.com>
 <20230509142235.3284028-7-kristina.martsenko@arm.com>
 <87ttvpndhx.wl-maz@kernel.org>
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On Sat, Jun 03, 2023 at 09:42:18AM +0100, Marc Zyngier wrote:
> On Tue, 09 May 2023 15:22:30 +0100,
> Kristina Martsenko <kristina.martsenko@arm.com> wrote:
> > 
> > As FEAT_MOPS is not supported in guests yet, hide it from the ID
> > registers for guests.
> > 
> > The MOPS instructions are UNDEFINED in guests as HCRX_EL2.MSCEn is not
> > set in HCRX_GUEST_FLAGS, and will take an exception to EL1 if executed.
> > 
> > Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> > Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
> 
> This is very likely to clash with Jing's series that completely
> reworks the whole idreg series, but as long as this is on its own
> branch, we can deal with that.

Yup, we will definitely want to get that ironed out. I'll pull Catalin's
branch when this all gets queued up.

Acked-by: Oliver Upton <oliver.upton@linux.dev>

-- 
Thanks,
Oliver