From: Yeoreum Yun <yeoreum.yun@arm.com>
To: Will Deacon <will@kernel.org>
Cc: catalin.marinas@arm.com, 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, 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, maz@kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
kvmarm@lists.linux.dev
Subject: Re: [PATCH v5 0/6] initialize SCTRL2_ELx
Date: Wed, 17 Sep 2025 17:44:28 +0100 [thread overview]
Message-ID: <aMrlbGs0MKlWKUFr@e129823.arm.com> (raw)
In-Reply-To: <aMrTkLhLOhas8Viy@willie-the-truck>
Hi,
> On Wed, Sep 17, 2025 at 03:56:12PM +0100, Yeoreum Yun 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.
> >
> > Patch History
> > ==============
> > from v4 to v5:
> > - using .ifc in set_sctlr2_elx
> > - change (re)initialise position after SCTLR_ELx
> > - add docs for SCTRL2_ELx
> > - rebase to v6.17-rc6
> > - https://lore.kernel.org/all/20250821172408.2101870-1-yeoreum.yun@arm.com/
>
> Sorry, this is a really pedantic nit, but please can you fix the typo in
> the subject if/when you next post this?
>
> More importantly, as Dave says, I don't see the point in merging this
> until we have a use for the register. At that point, your patches can
> hopefully be a prefix of the series that uses it.
Okay. Thanks.
--
Sincerely,
Yeoreum Yun
prev parent reply other threads:[~2025-09-17 16:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-17 14:56 [PATCH v5 0/6] initialize SCTRL2_ELx Yeoreum Yun
2025-09-17 14:56 ` [PATCH v5 1/6] arm64: make SCTLR2_EL1 accessible Yeoreum Yun
2025-09-17 14:56 ` [PATCH v5 2/6] arm64: initialise SCTLR2_ELx register at boot time Yeoreum Yun
2025-09-17 14:56 ` [PATCH v5 3/6] arm64: save/restore SCTLR2_EL1 when cpu_suspend()/resume() Yeoreum Yun
2025-09-17 14:56 ` [PATCH v5 4/6] arm64: initialise SCTLR2_EL1 at cpu_soft_restart() Yeoreum Yun
2025-09-17 14:56 ` [PATCH v5 5/6] arm64: make the per-task SCTLR2_EL1 Yeoreum Yun
2025-09-17 14:56 ` [PATCH v5 6/6] docs: arm64: Document booting requirements for FEAT_SCTLR2 Yeoreum Yun
2025-09-17 15:28 ` [PATCH v5 0/6] initialize SCTRL2_ELx Will Deacon
2025-09-17 16:44 ` Yeoreum Yun [this message]
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