From: Will Deacon <will.deacon@arm.com>
To: Andre Przywara <andre.przywara@arm.com>
Cc: "penberg@kernel.org" <penberg@kernel.org>,
"arnd@arndb.de" <arnd@arndb.de>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Marc Zyngier <Marc.Zyngier@arm.com>
Subject: Re: [PATCH] kvmtool: don't use PCI config space IRQ line field
Date: Fri, 6 Feb 2015 18:55:27 +0000 [thread overview]
Message-ID: <20150206185527.GC24099@arm.com> (raw)
In-Reply-To: <1423064390-15269-1-git-send-email-andre.przywara@arm.com>
On Wed, Feb 04, 2015 at 03:39:50PM +0000, Andre Przywara wrote:
> In PCI config space there is an interrupt line field (offset 0x3f),
> which is used to initially communicate the IRQ line number from
> firmware to the OS. _Hardware_ should never use this information,
> as the OS is free to write any information in there.
Is this true even with probe-only? I appreciate that this isn't a BAR,
but it still feels odd for Linux to write this in that case.
Will
WARNING: multiple messages have this Message-ID (diff)
From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] kvmtool: don't use PCI config space IRQ line field
Date: Fri, 6 Feb 2015 18:55:27 +0000 [thread overview]
Message-ID: <20150206185527.GC24099@arm.com> (raw)
In-Reply-To: <1423064390-15269-1-git-send-email-andre.przywara@arm.com>
On Wed, Feb 04, 2015 at 03:39:50PM +0000, Andre Przywara wrote:
> In PCI config space there is an interrupt line field (offset 0x3f),
> which is used to initially communicate the IRQ line number from
> firmware to the OS. _Hardware_ should never use this information,
> as the OS is free to write any information in there.
Is this true even with probe-only? I appreciate that this isn't a BAR,
but it still feels odd for Linux to write this in that case.
Will
next prev parent reply other threads:[~2015-02-06 18:55 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-28 14:51 [PATCH] PCI: Fix pcibios_update_irq misuse of irq number Marc Zyngier
2015-01-28 14:51 ` Marc Zyngier
2015-01-28 15:21 ` Jiang Liu
2015-01-28 15:21 ` Jiang Liu
2015-01-28 15:27 ` Marc Zyngier
2015-01-28 15:27 ` Marc Zyngier
2015-01-28 15:27 ` Marc Zyngier
2015-01-28 15:43 ` Bjorn Helgaas
2015-01-28 15:43 ` Bjorn Helgaas
2015-01-28 15:43 ` Bjorn Helgaas
2015-02-02 16:15 ` Marc Zyngier
2015-02-02 16:15 ` Marc Zyngier
2015-02-02 16:15 ` Marc Zyngier
2015-02-02 16:22 ` Bjorn Helgaas
2015-02-02 16:22 ` Bjorn Helgaas
2015-02-02 16:22 ` Bjorn Helgaas
2015-02-02 15:57 ` Bjorn Helgaas
2015-02-02 15:57 ` Bjorn Helgaas
2015-02-02 16:06 ` Jiang Liu
2015-02-02 16:06 ` Jiang Liu
2015-02-02 16:23 ` Marc Zyngier
2015-02-02 16:23 ` Marc Zyngier
2015-02-02 16:33 ` Russell King - ARM Linux
2015-02-02 16:33 ` Russell King - ARM Linux
2015-02-02 18:08 ` Marc Zyngier
2015-02-02 18:08 ` Marc Zyngier
2015-02-02 18:08 ` Marc Zyngier
2015-02-02 18:20 ` Russell King - ARM Linux
2015-02-02 18:20 ` Russell King - ARM Linux
2015-02-02 18:20 ` Russell King - ARM Linux
2015-02-02 17:02 ` Arnd Bergmann
2015-02-02 17:02 ` Arnd Bergmann
2015-02-03 10:38 ` Marc Zyngier
2015-02-03 10:38 ` Marc Zyngier
2015-02-03 10:38 ` Marc Zyngier
2015-02-03 11:31 ` Arnd Bergmann
2015-02-03 11:31 ` Arnd Bergmann
2015-02-03 11:31 ` Arnd Bergmann
2015-02-03 11:37 ` Marc Zyngier
2015-02-03 11:37 ` Marc Zyngier
2015-02-03 11:37 ` Marc Zyngier
2015-02-03 12:57 ` Arnd Bergmann
2015-02-03 12:57 ` Arnd Bergmann
2015-02-03 12:57 ` Arnd Bergmann
2015-02-04 15:39 ` [PATCH] kvmtool: don't use PCI config space IRQ line field Andre Przywara
2015-02-04 15:39 ` Andre Przywara
2015-02-06 18:55 ` Will Deacon [this message]
2015-02-06 18:55 ` Will Deacon
2015-02-06 19:02 ` Peter Maydell
2015-02-06 19:02 ` Peter Maydell
2015-02-06 19:07 ` Will Deacon
2015-02-06 19:07 ` Will Deacon
2015-02-07 21:24 ` arnd
2015-02-07 21:24 ` arnd at arndb.de
2015-06-04 15:20 Andre Przywara
2015-06-04 15:20 ` Andre Przywara
2015-06-05 16:41 ` Will Deacon
2015-06-05 16:41 ` Will Deacon
2015-06-15 10:45 ` Andre Przywara
2015-06-15 10:45 ` Andre Przywara
2015-06-16 17:06 ` Will Deacon
2015-06-16 17:06 ` Will Deacon
2015-06-18 17:19 ` Andre Przywara
2015-06-18 17:19 ` Andre Przywara
2015-06-29 10:10 ` Will Deacon
2015-06-29 10:10 ` Will Deacon
2015-06-29 13:48 ` Andre Przywara
2015-06-29 13:48 ` Andre Przywara
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