From: Kristina Martsenko <kristina.martsenko@arm.com>
To: Mark Brown <broonie@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Oliver Upton <oliver.upton@linux.dev>,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Mark Rutland <mark.rutland@arm.com>,
Luis Machado <luis.machado@arm.com>,
Vladimir Murzin <vladimir.murzin@arm.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 03/10] KVM: arm64: switch HCRX_EL2 between host and guest
Date: Wed, 22 Feb 2023 18:36:19 +0000 [thread overview]
Message-ID: <d61573bb-07be-5abe-4ca5-8649ac79e430@arm.com> (raw)
In-Reply-To: <Y+5Xy/Hqu4FKLTUE@sirena.org.uk>
On 16/02/2023 16:20, Mark Brown wrote:
> On Thu, Feb 16, 2023 at 04:00:05PM +0000, Kristina Martsenko wrote:
>
>> After this change, SMPME is no longer set for guests, which should have
>> no effect as SME is currently disabled for guests.
>
> SMPME is mainly set for the benefit of any future guests, it is
> used to turn off SME priorities for guests. While it's true that
> we don't have any guests support yet it's there as safety to
> ensure we don't forget to enable it later on or something
> otherwise goes wrong. We don't need priority mapping on the host
> since we don't have any priority mapping support at all, and it's
> difficult to see a reason why we would want to remap our own
> priorities in the host.
That makes sense. I'll fix this in v2 so that priority mapping is enabled for
guests and disabled for the host.
Thanks,
Kristina
next prev parent reply other threads:[~2023-02-22 18:36 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-16 16:00 [PATCH 00/10] arm64: support Armv8.8 memcpy instructions in userspace Kristina Martsenko
2023-02-16 16:00 ` [PATCH 01/10] KVM: arm64: initialize HCRX_EL2 Kristina Martsenko
2023-03-17 14:25 ` Catalin Marinas
2023-02-16 16:00 ` [PATCH 02/10] arm64: cpufeature: detect FEAT_HCX Kristina Martsenko
2023-03-17 14:25 ` Catalin Marinas
2023-02-16 16:00 ` [PATCH 03/10] KVM: arm64: switch HCRX_EL2 between host and guest Kristina Martsenko
2023-02-16 16:20 ` Mark Brown
2023-02-22 18:36 ` Kristina Martsenko [this message]
2023-02-16 16:35 ` Marc Zyngier
2023-02-22 18:42 ` Kristina Martsenko
2023-02-16 16:00 ` [PATCH 04/10] arm64: mops: document boot requirements for MOPS Kristina Martsenko
2023-03-17 15:07 ` Catalin Marinas
2023-03-24 1:00 ` Kristina Martsenko
2023-04-04 10:50 ` Catalin Marinas
2023-04-11 16:57 ` Kristina Martsenko
2023-02-16 16:00 ` [PATCH 05/10] arm64: mops: don't disable host MOPS instructions from EL2 Kristina Martsenko
2023-03-17 15:07 ` Catalin Marinas
2023-02-16 16:00 ` [PATCH 06/10] KVM: arm64: hide MOPS from guests Kristina Martsenko
2023-03-17 15:09 ` Catalin Marinas
2023-02-16 16:00 ` [PATCH 07/10] arm64: mops: handle MOPS exceptions Kristina Martsenko
2023-03-17 15:45 ` Catalin Marinas
2023-02-16 16:00 ` [PATCH 08/10] arm64: mops: handle single stepping after MOPS exception Kristina Martsenko
2023-03-17 16:02 ` Catalin Marinas
2023-02-16 16:00 ` [PATCH 09/10] arm64: mops: detect and enable FEAT_MOPS Kristina Martsenko
2023-02-16 16:22 ` Mark Brown
2023-03-17 16:03 ` Catalin Marinas
2023-02-16 16:00 ` [PATCH 10/10] arm64: mops: allow disabling MOPS from the kernel command line Kristina Martsenko
2023-03-17 16:04 ` Catalin Marinas
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