From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org,
Vladimir Murzin <vladimir.murzin@arm.com>
Cc: catalin.marinas@arm.com, kernel-team@android.com,
Will Deacon <will@kernel.org>,
mark.rutland@arm.com, maz@kernel.org, ruanjinjie@huawei.com,
liaochang1@huawei.com
Subject: Re: [RFC PATCH v2 00/45] arm64: Add support for FEAT_NMI
Date: Thu, 6 Aug 2026 18:11:47 +0100 [thread overview]
Message-ID: <178602166709.420813.3290777524014442521.b4-ty@kernel.org> (raw)
In-Reply-To: <20260727163453.7969-1-vladimir.murzin@arm.com>
On Mon, 27 Jul 2026 17:34:08 +0100, Vladimir Murzin wrote:
> FEAT_NMI provides an architected mechanism for supporting non-maskable
> interrupts (NMIs) and less-masked interrupts (LMIs).
>
> Since we already support pseudo-NMIs via priority masking, introducing
> another flavour of NMI on top of the existing infrastructure could
> easily become messy, making the code harder to follow and reason
> about.
>
> [...]
Applied first seven to arm64 (for-next/nmi), thanks!
[01/45] arm64: ptrace: Remove INIT_PSTATE_EL2
https://git.kernel.org/arm64/c/b7f741717d1e
[02/45] arm64: debug: don't mask DAIF for mdscr_write()
https://git.kernel.org/arm64/c/7cf2d6efb86f
[03/45] arm64: hibernate: mask DAIF before restoring hibernated kernel
https://git.kernel.org/arm64/c/684bde100117
[04/45] arm64: hibernate: Restore DAIF state on error
https://git.kernel.org/arm64/c/541549827889
[05/45] arm64: suspend: rely on daif helpers to handle PMR
https://git.kernel.org/arm64/c/630ca6c58fcf
[06/45] arm64: suspend: Initialize PMR on resume
https://git.kernel.org/arm64/c/d3ebdc1772c0
[07/45] arm64: entry: mask DAIF before returning from C EL1 handlers
https://git.kernel.org/arm64/c/0d774e0517f3
It's a bit of a drop in the ocean, but they seem like sensible
improvements to me and there's no point in you carrying them out of
tree.
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
prev parent reply other threads:[~2026-08-06 17:12 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-27 16:34 [RFC PATCH v2 00/45] arm64: Add support for FEAT_NMI Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 01/45] arm64: ptrace: Remove INIT_PSTATE_EL2 Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 02/45] arm64: debug: don't mask DAIF for mdscr_write() Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 03/45] arm64: hibernate: mask DAIF before restoring hibernated kernel Vladimir Murzin
2026-07-28 1:17 ` Jinjie Ruan
2026-07-27 16:34 ` [RFC PATCH v2 04/45] arm64: hibernate: Restore DAIF state on error Vladimir Murzin
2026-07-28 1:16 ` Jinjie Ruan
2026-07-27 16:34 ` [RFC PATCH v2 05/45] arm64: suspend: rely on daif helpers to handle PMR Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 06/45] arm64: suspend: Initialize PMR on resume Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 07/45] arm64: entry: mask DAIF before returning from C EL1 handlers Vladimir Murzin
2026-07-28 2:00 ` Jinjie Ruan
2026-07-27 16:34 ` [RFC PATCH v2 08/45] irqchip/gic-v3: make the unmasking of pseudo-NMIs explicit when handling IRQs Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 09/45] arm64: entry: Avoid unnecessary local_irq_disable() on kernel exit Vladimir Murzin
2026-07-28 3:18 ` Jinjie Ruan
2026-08-03 9:32 ` Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 10/45] arm64: irqflags: Introduce arm64-specific irqflags type Vladimir Murzin
2026-07-28 2:42 ` Jinjie Ruan
2026-07-27 16:34 ` [RFC PATCH v2 11/45] arm64: irqflags: save and use both DAIF and PMR Vladimir Murzin
2026-07-28 3:46 ` Jinjie Ruan
2026-07-27 16:34 ` [RFC PATCH v2 12/45] arm64: interrupts: Add common exception state helpers Vladimir Murzin
2026-07-28 8:20 ` Jinjie Ruan
2026-08-03 9:40 ` Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 13/45] arm64: process: Use helper to check exception state Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 14/45] arm64: entry: Introduce entry specific exception masking helpers Vladimir Murzin
2026-07-28 8:48 ` Jinjie Ruan
2026-08-03 12:12 ` Vladimir Murzin
2026-07-28 9:18 ` Jinjie Ruan
2026-08-03 12:21 ` Vladimir Murzin
2026-07-28 9:29 ` Jinjie Ruan
2026-07-27 16:34 ` [RFC PATCH v2 15/45] arm64: entry: replace DAIF helpers with entry helpers Vladimir Murzin
2026-07-28 9:53 ` Jinjie Ruan
2026-08-03 12:23 ` Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 16/45] arm64: interrupts: Introduce exception masking save/restore helpers Vladimir Murzin
2026-07-28 11:56 ` Jinjie Ruan
2026-08-03 12:24 ` Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 17/45] arm64: interrupts: introduce a helper for GIC priority initialization Vladimir Murzin
2026-07-28 11:21 ` Jinjie Ruan
2026-07-27 16:34 ` [RFC PATCH v2 18/45] arm64: replace local_daif helpers Vladimir Murzin
2026-07-28 12:04 ` Jinjie Ruan
2026-07-27 16:34 ` [RFC PATCH v2 19/45] arm64: cpuidle: use new helpers to bypass interrupt priority masking Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 20/45] arm64: remove daifflags.h Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 21/45] arm64: gicv3: remove GIC_PRIO_PSR_I_SET Vladimir Murzin
2026-07-28 12:08 ` Jinjie Ruan
2026-08-03 12:27 ` Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 22/45] arm64: cpufeature: Remove system_has_prio_mask_debugging() Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 23/45] arm64: irqflags: Switch to CONFIG_DEBUG_IRQFLAGS Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 24/45] arm64: Kconfig: Remove CONFIG_ARM64_DEBUG_PRIORITY_MASKING Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 25/45] efi/runtime-wrappers: Permit architectures to override IRQ flags checks Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 26/45] arm64/efi: Implement override for " Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 27/45] arm64: booting: Document boot requirements for FEAT_NMI Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 28/45] arm64: sysreg: Add definitions for immediate versions of MSR ALLINT Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 29/45] arm64: ptrace: Add PSR_ALLINT_BIT Vladimir Murzin
2026-07-28 3:58 ` Jinjie Ruan
2026-07-27 16:34 ` [RFC PATCH v2 30/45] arm64: idreg: Add an override for FEAT_NMI Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 31/45] arm64: cpufeature: Detect PE support " Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 32/45] arm64: nmi: Manage masking for superpriority interrupts Vladimir Murzin
2026-07-28 12:14 ` Jinjie Ruan
2026-08-03 12:28 ` Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 33/45] arm64: irq: Report FEAT_NMI masking local IRQs Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 34/45] arm64: nmi: Add handling of superpriority interrupts as NMIs Vladimir Murzin
2026-07-28 12:25 ` Jinjie Ruan
2026-08-03 12:33 ` Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 35/45] arm64: suspend: Always initialise PSTATE.ALLINT Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 36/45] arm64/efi: Add ALLINT to IRQ flags checks Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 37/45] arm64: kprobes: Disable NMIs Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 38/45] arm64: smp: Abstract SGI and LPI operations Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 39/45] arm64: smp: Fall back to IRQ when IPI NMI request fails Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 40/45] arm64: nmi: Add Kconfig for NMI Vladimir Murzin
2026-07-28 6:24 ` Jinjie Ruan
2026-08-03 9:36 ` Vladimir Murzin
2026-08-03 11:37 ` Jinjie Ruan
2026-07-27 16:34 ` [RFC PATCH v2 41/45] irqchip/gic-v3: Prepare for FEAT_GICv3_NMI support Vladimir Murzin
2026-07-28 12:29 ` Jinjie Ruan
2026-08-03 12:34 ` Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 42/45] irqchip/gic-v3: Implement " Vladimir Murzin
2026-07-28 12:31 ` Jinjie Ruan
2026-07-27 16:34 ` [RFC PATCH v2 43/45] arm64: smp: Add NMI support for LPI-backed IPIs Vladimir Murzin
2026-07-28 12:34 ` Jinjie Ruan
2026-07-27 16:34 ` [RFC PATCH v2 44/45] irqchip/gic-v5: Add NMI support for PPIs, SPIs and LPIs Vladimir Murzin
2026-07-27 16:34 ` [RFC PATCH v2 45/45] irqchip/gic-v5: Add NMI support for IPIs Vladimir Murzin
2026-08-06 17:11 ` Will Deacon [this message]
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