From: Marc Zyngier <maz@kernel.org>
To: Lorenzo Pieralisi <lpieralisi@kernel.org>
Cc: Mark Brown <broonie@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Sami Mujawar <Sami.Mujawar@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v1 00/18] arm64/nmi: Support for FEAT_NMI
Date: Mon, 14 Nov 2022 11:11:57 +0000 [thread overview]
Message-ID: <87cz9pvlhe.wl-maz@kernel.org> (raw)
In-Reply-To: <Y2zbMW8gx0vcSHdf@lpieralisi>
On Thu, 10 Nov 2022 11:06:25 +0000,
Lorenzo Pieralisi <lpieralisi@kernel.org> wrote:
>
> [...]
>
> > > > Frankly, we are accumulating a bunch of half implemented features
> > > > (SME, SPE) for which there is no KVM support, and I don't think this
> > > > is the correct direction of travel.
> > >
> > > Yeah, it's not great. For NMIs Lorenzo is looking at the GIC side, I'll
> > > let him clarify his schedule. Here it's more the case that implementing
> > > the architecture side without an interrupt controller isn't useful (and
> > > certainly not usefully testable) than anything else - my expectation is
> > > that it should work fine, though from your comments above it sounds like
> > > there will be issues with the handling of PSTATE that I've not realised.
> >
> > The vgic support should be rather trivial. It is only a matter of
> > adding the required interrupt state, reworking the priority sorting
> > and LR stuffing, handling the additional MMIO range and dealing with
> > the GIC versioning. Trapping of ALLINT should be done at the same
> > time.
> >
> > If people cannot be bothered, I'll end-up doing it myself.
>
> Apologies for the slow feedback.
>
> I should be able to do it - I thought that we could start with sorting out
> the host required changes but it makes sense to make the KVM changes at
> the same time.
I'm reviving the couple of hacks I had come up with a long while ago,
and will point you to them once I'm done. Feel free to take them or
ignore them altogether.
Cheers,
M.
--
Without deviation from the norm, progress is not possible.
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next prev parent reply other threads:[~2022-11-14 11:13 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-04 23:54 [PATCH v1 00/18] arm64/nmi: Support for FEAT_NMI Mark Brown
2022-11-04 23:54 ` [PATCH v1 01/18] arm64/booting: Document boot requirements " Mark Brown
2022-11-04 23:54 ` [PATCH v1 02/18] arm64/sysreg: Add definition for ICC_NMIAR1_EL1 Mark Brown
2022-11-04 23:54 ` [PATCH v1 03/18] arm64/sysreg: Add definition of ISR_EL1 Mark Brown
2022-11-04 23:54 ` [PATCH v1 04/18] arm64/sysreg: Add definitions for immediate versions of MSR ALLINT Mark Brown
2022-11-04 23:54 ` [PATCH v1 05/18] arm64/asm: Introduce assembly macros for managing ALLINT Mark Brown
2022-11-04 23:54 ` [PATCH v1 06/18] arm64/hyp-stub: Enable access to ALLINT Mark Brown
2022-11-04 23:54 ` [PATCH v1 07/18] arm64/idreg: Add an override for FEAT_NMI Mark Brown
2022-11-04 23:54 ` [PATCH v1 08/18] arm64/cpufeature: Detect PE support for NMIs Mark Brown
2022-11-04 23:54 ` [PATCH v1 09/18] arm64/entry: Manage ALLINT.ALLINT when FEAT_NMI is active Mark Brown
2022-11-04 23:54 ` [PATCH v1 10/18] arm64/mm: Disable all interrupts while replacing TTBR1 Mark Brown
2022-11-04 23:54 ` [PATCH v1 11/18] arm64/hibernate: Disable NMIs while hibernating Mark Brown
2022-11-04 23:54 ` [PATCH v1 12/18] arm64/suspend: Disable NMIs while suspending Mark Brown
2022-11-04 23:54 ` [PATCH v1 13/18] arm64/kexec: Mask NMIs before starting new kernel Mark Brown
2022-11-04 23:54 ` [PATCH v1 14/18] arm64/acpi: Mask NMIs while notifying SEA Mark Brown
2022-11-04 23:54 ` [PATCH v1 15/18] arm64/irq: Document handling of FEAT_NMI in irqflags.h Mark Brown
2022-11-04 23:54 ` [PATCH v1 16/18] arm64/nmi: Add handling of superpriority interrupts as NMIs Mark Brown
2022-11-04 23:54 ` [PATCH v1 17/18] arm64/nmi: Add Kconfig for NMI Mark Brown
2022-11-04 23:54 ` [PATCH v1 18/18] irqchip/gic-v3: Implement FEAT_GICv3_NMI support Mark Brown
2022-11-06 11:38 ` [PATCH v1 00/18] arm64/nmi: Support for FEAT_NMI Marc Zyngier
2022-11-09 15:35 ` Mark Brown
2022-11-10 8:26 ` Marc Zyngier
2022-11-10 11:06 ` Lorenzo Pieralisi
2022-11-14 11:11 ` Marc Zyngier [this message]
2022-11-10 11:48 ` Mark Brown
2022-12-18 9:40 ` Zenghui Yu
2022-12-19 12:36 ` Mark Brown
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