linux-kernel - [patch 0/3] x86/PCI/MSI: Make sure that irq reservation mode works everywhere

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: <20171017075456.694047687@linutronix.de>
Date:   Tue, 17 Oct 2017 09:54:56 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Dexuan Cui <decui@...rosoft.com>, x86@...nel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Marc Zyngier <marc.zyngier@....com>,
        KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        linux-pci@...r.kernel.org, devel@...uxdriverproject.org,
        Josh Poulson <jopoulso@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Simon Xiao <sixiao@...rosoft.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Mihai Costache <v-micos@...rosoft.com>,
        Jork Loeser <Jork.Loeser@...rosoft.com>
Subject: [patch 0/3] x86/PCI/MSI: Make sure that irq reservation mode works
 everywhere

Dexuan reported that the recent rework of the vector allocation mode in x86
broke HyperV PCI passtrough because the rework missed to add the
MSI_FLAG_MUST_REACTIVATE flag to the HyperV/PCI interrupt domain info.

The simple solution would be to set the flag in the HyperV/PCI driver but
it's better to make this generic and let the PCI/MSI core code set the flag
when reservation mode is enabled. That ensures that future users of this
wont trip over the same problem.

Thanks,

	tglx

---
 arch/x86/Kconfig           |    2 +-
 arch/x86/kernel/apic/msi.c |    5 ++---
 drivers/pci/msi.c          |    2 ++
 kernel/irq/Kconfig         |    3 +++
 4 files changed, 8 insertions(+), 4 deletions(-)