From: Gleb Natapov <gleb@redhat.com>
To: Adhyas Avasthi <adhyas@gmail.com>
Cc: kvm@vger.kernel.org
Subject: Re: Issue with 64-bit code execution with kvm enabled
Date: Sun, 14 Nov 2010 08:59:51 +0200 [thread overview]
Message-ID: <20101114065951.GC7948@redhat.com> (raw)
In-Reply-To: <AANLkTinzP6ro+RSQUizds8XEWk84HP-L=s0ocpr6CO6w@mail.gmail.com>
On Sat, Nov 13, 2010 at 03:37:14PM -0800, Adhyas Avasthi wrote:
> I am trying to boot a 64-bit GRUB2 based EFI Boot Loader on top of
> OVMF based EFI BIOS (also 64 bit) for x86_64. My host is Ubuntu 10.04
> x86_64 and I am running qemu-kvm-0.13.0 with self-built
> kvm-kmod-2.6.32.17 for my kernel version which is 2.6.32-24 (I used
> the default Ubuntu KVM and qemu versions with same issue earlier). My
> host PC is Lenovo T410 with Intel Core i5
>
> GRUB2 is built with gcc and apparently, EFI has a different calling
> convention so GRUB2 has an assembly wrapper file that changes the
> parameter as per desired calling convention. The problem is that if I
> start the loader with kvm disabled, everything goes fine and their
> wrapper instructions do the right thing as well. If I enable kvm,
> however, I get an x64 exception (as below):
>
> !!!! X64 Exception Type - 000000000000000D !!!!
> ExceptionData - 0000000000000000
> RIP - 000000001FFA95FA, RFL - 0000000000010202
Can you disassemble code around the RIP?
Also provide ftrace of kvm execution during the failure.
--
Gleb.
prev parent reply other threads:[~2010-11-14 6:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-13 23:37 Issue with 64-bit code execution with kvm enabled Adhyas Avasthi
2010-11-14 6:22 ` Adhyas Avasthi
2010-11-14 6:41 ` Adhyas Avasthi
2010-11-14 6:59 ` Gleb Natapov [this message]
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