From: Thomas Gleixner <tglx@linutronix.de>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
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: Re: [patch 0/3] x86/PCI/MSI: Make sure that irq reservation mode works everywhere
Date: Sat, 21 Oct 2017 09:19:24 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.20.1710210918270.3428@nanos> (raw)
In-Reply-To: <20171020230127.GW6332@bhelgaas-glaptop.roam.corp.google.com>
On Fri, 20 Oct 2017, Bjorn Helgaas wrote:
> On Tue, Oct 17, 2017 at 09:54:56AM +0200, Thomas Gleixner wrote:
> > 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(-)
>
> This mentions 4900be83602b ("x86/vector/msi: Switch to global reservation
> mode"), which I don't have, so I assume it's an x86 thing. So I guess
> you'll probably merge this via the same tree?
Yes, it's in tip/x86/apic branch and the fixups are applied there now as well.
Thanks,
tglx
prev parent reply other threads:[~2017-10-21 7:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-17 7:54 [patch 0/3] x86/PCI/MSI: Make sure that irq reservation mode works everywhere Thomas Gleixner
2017-10-17 7:54 ` [patch 1/3] genirq: Add config option for reservation mode 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 12:28 ` Thomas Gleixner
2017-10-17 7:54 ` [patch 3/3] x86/vector/msi: Select CONFIG_GENERIC_IRQ_RESERVATION_MODE Thomas Gleixner
2017-10-17 18:59 ` Dexuan Cui
2017-10-17 21:49 ` 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 [this message]
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