From: Marc Zyngier <maz@kernel.org>
To: Yeoreum Yun <yeoreum.yun@arm.com>
Cc: catalin.marinas@arm.com, will@kernel.org, broonie@kernel.org,
oliver.upton@linux.dev, anshuman.khandual@arm.com,
robh@kernel.org, james.morse@arm.com, mark.rutland@arm.com,
joey.gouly@arm.com, ry111@xry111.site, Dave.Martin@arm.com,
ahmed.genidi@arm.com, kevin.brodsky@arm.com,
scott@os.amperecomputing.com, mbenes@suse.cz,
james.clark@linaro.org, frederic@kernel.org, rafael@kernel.org,
pavel@kernel.org, ryan.roberts@arm.com, suzuki.poulose@arm.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
kvmarm@lists.linux.dev
Subject: Re: [PATCH 00/11] support SCTLR2_ELx
Date: Mon, 04 Aug 2025 13:37:23 +0100 [thread overview]
Message-ID: <86qzxr6z5o.wl-maz@kernel.org> (raw)
In-Reply-To: <20250804121724.3681531-1-yeoreum.yun@arm.com>
On Mon, 04 Aug 2025 13:17:13 +0100,
Yeoreum Yun <yeoreum.yun@arm.com> wrote:
>
> This series introduces initial support for the SCTLR2_ELx registers in Linux.
> The feature is optional starting from ARMv8.8/ARMv9.3,
> and becomes mandatory from ARMv8.9/ARMv9.4.
>
> Currently, Linux has no strict need to modify SCTLR2_ELx—
> at least assuming that firmware initializes
> these registers to reasonable defaults.
>
> However, several upcoming architectural features will require configuring
> control bits in these registers.
> Notable examples include FEAT_PAuth_LR and FEAT_CPA2.
>
> This series is based on v6.16 and probably KVM-safe but
> Not tested yet:
> - nVHE boot.
"Probably" and "Not tested yet" are not exactly what we are looking
for when looking at a series that adds support for a new architectural
feature.
Also, a lot of the KVM patches are redundant now that we do have
FEAT_SCTLR2 support in KVM (see what has been merged for 6.17). You
probably want to rebase on -rc1 once it is released, which should cut
the series by half.
Thanks,
M.
--
Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2025-08-04 12:37 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-04 12:17 [PATCH 00/11] support SCTLR2_ELx Yeoreum Yun
2025-08-04 12:17 ` [PATCH 01/11] arm64/sysreg: add system registers SCTLR2_EL2 Yeoreum Yun
2025-08-04 12:24 ` Mark Brown
2025-08-04 13:05 ` Yeoreum Yun
2025-08-04 12:17 ` [PATCH 02/11] arm64: make SCTLR2_EL1 accessible Yeoreum Yun
2025-08-04 12:17 ` [PATCH 03/11] arm64: initialise SCTLR2_ELx register at boot time Yeoreum Yun
2025-08-04 12:17 ` [PATCH 04/11] arm64: cpufeature: add FEAT_SCTLR2 feature Yeoreum Yun
2025-08-04 12:17 ` [PATCH 05/11] arm64: save/restore SCTLR2_EL1 when cpu_suspend()/resume() Yeoreum Yun
2025-08-04 12:17 ` [PATCH 06/11] arm64: init SCTLR2_EL1 at cpu_soft_restart() Yeoreum Yun
2025-08-04 12:17 ` [PATCH 07/11] arm64: make the per-task SCTLR2_EL1 Yeoreum Yun
2025-08-05 9:01 ` kernel test robot
2025-08-04 12:17 ` [PATCH 08/11] KVM: arm64: initialise SCTLR2_EL1 at __kvm_host_psci_cpu_entry() Yeoreum Yun
2025-08-04 12:17 ` [PATCH 09/11] KVM: arm64: support SCTLR2_EL1 for guest Yeoreum Yun
2025-08-04 12:17 ` [PATCH 10/11] KVM: arm64: nv: support SCTLR2_ELx on nv Yeoreum Yun
2025-08-04 13:11 ` Marc Zyngier
2025-08-04 15:03 ` Yeoreum Yun
2025-08-04 12:17 ` [PATCH 11/11] KVM: arm64: expose FEAT_SCTLR2 feature to guest Yeoreum Yun
2025-08-04 12:37 ` Marc Zyngier [this message]
2025-08-04 13:04 ` [PATCH 00/11] support SCTLR2_ELx Yeoreum Yun
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