From: Avi Kivity <avi@redhat.com>
To: Julian Stecklina <jsteckli@os.inf.tu-dresden.de>
Cc: kvm@vger.kernel.org, "udo@hypervisor.org" <udo@hypervisor.org>
Subject: Re: IOAPIC doesn't handle byte writes
Date: Tue, 22 Nov 2011 16:19:37 +0200 [thread overview]
Message-ID: <4ECBAF79.6050000@redhat.com> (raw)
In-Reply-To: <1321967582.16507.10.camel@tabernacle.lan>
On 11/22/2011 03:13 PM, Julian Stecklina wrote:
> Hello,
>
> KVM emulates an IOAPIC that doesn't handle byte writes to its
> IOAPIC_REG_SELECT register, although for example the ICH10 spec[1]
> clearly states that this is an 8-bit register. See
> http://www.intel.com/content/dam/doc/datasheet/io-controller-hub-10-family-datasheet.pdf
> Table 13-4 on page 433.
>
> The code in question is:
>
> http://git.kernel.org/?p=virt/kvm/kvm.git;a=blob;f=virt/kvm/ioapic.c;h=3eed61eb48675a63dd1f31b0095217ab6bc5f646;hb=HEAD#l323
>
> This breaks IOAPIC code in OSes that adhere to the spec.
Agree, the code is broken.
> I would file a bug, but the kernel bugzilla seems to be down at the
> moment.
Care to post a patch instead?
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2011-11-22 14:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-22 13:13 IOAPIC doesn't handle byte writes Julian Stecklina
2011-11-22 14:19 ` Avi Kivity [this message]
2011-12-04 9:53 ` Gleb Natapov
-- strict thread matches above, loose matches on Subject: below --
2011-11-22 15:06 Julian Stecklina
2011-11-23 10:45 ` Avi Kivity
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