Re: [RFC PATCH v2 00/45] arm64: Add support for FEAT_NMI
From: Will Deacon <will@kernel.org>
Date: 2026-08-06 17:12:38
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