From: Amit Shah <amit.shah@qumranet.com>
To: kvm-devel@lists.sourceforge.net
Subject: Re: [kvm-devel] [PATCH] Refactor hypercall infrastructure (v2)
Date: Mon, 3 Dec 2007 17:00:23 +0530
User-Agent: KMail/1.9.6 (enterprise 0.20070907.709405)
Cc: Avi Kivity <avi@qumranet.com>, Anthony Liguori <aliguori@us.ibm.com>,
       linux-kernel@vger.kernel.org
References: <11898788932902-git-send-email-aliguori@us.ibm.com> <200712031416.51710.amit.shah@qumranet.com> <4753C59A.4030206@qumranet.com>
In-Reply-To: <4753C59A.4030206@qumranet.com>
MIME-Version: 1.0
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 8BIT
Content-Disposition: inline
Message-Id: <200712031700.24084.amit.shah@qumranet.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1206
Lines: 39

* Avi Kivity wrote:
> Amit Shah wrote:
> > * Anthony Liguori wrote:
> > ?
> >
> >> Amit Shah wrote:
> >> ? ?
> >>
> >> What are you using to issue the hypercall?
> >> ? ?
> >
> > + ? ? ? r = kvm_hypercall1(KVM_PV_PCI_DEVICE, page_gfn);
> >
> > Setup is done by:
> >
> > + ? ? ? if (!kvm_para_available()) {
> > + ? ? ? ? ? ? ? printk(KERN_ERR "KVM paravirt support not available\n");
> > + ? ? ? ? ? ? ? r = -ENODEV;
> > + ? ? ? ? ? ? ? goto out_dereg;
> > + ? ? ? }
> > ?
>
> There was a bug where instructions with a modrm byte specifying a
> register would try to access memory. ?In the memory was not mapped, ?
> emulation would fail. vmcall is one such instruction. ?This was fixed by
>
> commit f83562246921d6a8a7de8b76853a6835ace3699d
> Author: Aurelien Jarno <aurelien@aurel32.net>
> Date: ? Wed Oct 17 19:30:41 2007 +0200
>
> ? ? KVM: x86 emulator: fix access registers for instructions with ModR/M
> byte and Mod = 3

Thanks, and thank you, Aurelien!
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/