From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Dexuan Cui <decui@microsoft.com>,
x86@kernel.org, Bjorn Helgaas <bhelgaas@google.com>,
Marc Zyngier <marc.zyngier@arm.com>,
KY Srinivasan <kys@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
linux-pci@vger.kernel.org, devel@linuxdriverproject.org,
Josh Poulson <jopoulso@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Simon Xiao <sixiao@microsoft.com>,
Saeed Mahameed <saeedm@mellanox.com>,
Mihai Costache <v-micos@microsoft.com>,
Jork Loeser <Jork.Loeser@microsoft.com>
Subject: [patch 0/3] x86/PCI/MSI: Make sure that irq reservation mode works everywhere
Date: Tue, 17 Oct 2017 09:54:56 +0200 [thread overview]
Message-ID: <20171017075456.694047687@linutronix.de> (raw)
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(-)
next reply other threads:[~2017-10-17 7:56 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-17 7:54 Thomas Gleixner [this message]
2017-10-17 7:54 ` [patch 1/3] genirq: Add config option for reservation mode Thomas Gleixner
2017-10-17 7:54 ` Thomas Gleixner
2017-10-18 13:42 ` [tip:x86/apic] " tip-bot for Thomas Gleixner
2017-10-17 7:54 ` [patch 2/3] PCI/MSI: Set MSI_FLAG_MUST_REACTIVATE in core code Thomas Gleixner
2017-10-17 7:54 ` Thomas Gleixner
2017-10-17 12:28 ` Thomas Gleixner
2017-10-18 13:43 ` [tip:x86/apic] " tip-bot for Thomas Gleixner
2017-10-17 7:54 ` [patch 3/3] x86/vector/msi: Select CONFIG_GENERIC_IRQ_RESERVATION_MODE Thomas Gleixner
2017-10-17 7:54 ` Thomas Gleixner
2017-10-17 18:59 ` Dexuan Cui
2017-10-17 18:59 ` Dexuan Cui
2017-10-17 21:49 ` Thomas Gleixner
2017-10-18 13:43 ` [tip:x86/apic] " tip-bot for Thomas Gleixner
2017-10-20 23:01 ` [patch 0/3] x86/PCI/MSI: Make sure that irq reservation mode works everywhere Bjorn Helgaas
2017-10-21 7:19 ` Thomas Gleixner
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