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Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg
From: |
Andreas Färber |
Subject: |
Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg |
Date: |
Tue, 17 Sep 2013 14:32:54 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 |
Hi,
Am 17.09.2013 13:37, schrieb Andriy Gapon:
>
> It seems that when qemu is run with accel=kvm:tcg then -d in_asm does not
> produce anything. At least, with the qemu and kvm that I have access to.
Are you saying that with accel=kvm:tcg when falling back to TCG, -d
in_asm does not work?
For accel=kvm it's expected not to produce any output since QEMU does
not process any Translation Blocks then.
> Is there any way to obtain equivalent logging in such a configuration?
> A note: a host and a guest are both amd64 (x86_64).
Under Linux, trace options for the kvm kernel module can be enabled via
the file system.
Regards,
Andreas
>
> Some background. I am trying to debug a problem with booting a FreeBSD VM.
> If
> acceleration is not used then the VM boots just fine. But with acceleration
> the
> boot process hangs somewhere in FreeBSD boot loader, judging from what I see
> on
> a screen.
> I suspect that there could be a problem with jumping from real to protected
> mode
> or some such "exotic" environment. To narrow down the possibilities I would
> like to examine execution trace and see where execution goes into the weeds.
>
> Thank you very much in advance.
>
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- [Qemu-devel] in_asm substitute for accel=kvm:tcg, Andriy Gapon, 2013/09/17
- Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg,
Andreas Färber <=
- Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg, Andriy Gapon, 2013/09/17
- Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg, Gleb Natapov, 2013/09/17
- Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg, Andriy Gapon, 2013/09/19
- Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg, Paolo Bonzini, 2013/09/19
- Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg, Andriy Gapon, 2013/09/19
- Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg, Paolo Bonzini, 2013/09/19
- Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg, Andriy Gapon, 2013/09/19
- Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg, Andriy Gapon, 2013/09/19
- Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg, Gleb Natapov, 2013/09/22
- Re: [Qemu-devel] in_asm substitute for accel=kvm:tcg, Andriy Gapon, 2013/09/22