linux-kernel - [patch V2 0/3] x86/irq: Bugfix and cleanup for posted MSI interrupts

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251125214446.766096680@linutronix.de>
Date: Tue, 25 Nov 2025 22:50:43 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org,
 Luigi Rizzo <lrizzo@...gle.com>
Subject: [patch V2 0/3] x86/irq: Bugfix and cleanup for posted MSI interrupts

A small update to V1 which can be found here:

  https://lore.kernel.org/lkml/20251125101912.564125647@linutronix.de

Luigi reported that the retrigger mechanism for posted MSI interrupts is
broken. That happens because retrigger sends an IPI to the actual allocated
vector, which is handled correctly, but lacks an EOI. That leaves a stale
APIC ISR bit around.

The following series addresses this and does some related cleanups in that
area on top.

Changes vs. V1:

   Use __this_cpu_*() - Luigi

Thanks,

	tglx
---
 arch/x86/include/asm/irq_remapping.h |   12 ++++++-
 arch/x86/kernel/irq.c                |   54 +++++++++++++++++++++++------------
 drivers/iommu/intel/irq_remapping.c  |   12 +++----
 3 files changed, 52 insertions(+), 26 deletions(-)