Re: kvm with OpenBSD 4.5

From: "David S. Ahern" <daahern@cisco.com>
To: Dongsheng Song <dongsheng.song@gmail.com>
Cc: Brian Jackson <iggy@theiggy.com>,
	kvm@vger.kernel.org, misc <misc@openbsd.org>
Subject: Re: kvm with OpenBSD 4.5
Date: Thu, 16 Apr 2009 21:39:45 -0600	[thread overview]
Message-ID: <49E7FA01.9000301@cisco.com> (raw)
In-Reply-To: <4b3406f0904162025q273e98c4m6d45dab9475e465e@mail.gmail.com>

Have you seen this thread:

http://article.gmane.org/gmane.comp.emulators.kvm.devel/28649

It's the one that resulted in these patches by Marcelo:
http://article.gmane.org/gmane.comp.emulators.kvm.devel/30452
http://article.gmane.org/gmane.comp.emulators.kvm.devel/30453

david

Dongsheng Song wrote:
> No good news, same as kvm-84 vanilla.
> 
> 2009/4/17 David S. Ahern <daahern@cisco.com>:
>> I believe this is the patch that should fix the problem:
>>
>> Index: kvm/arch/x86/kvm/mmu.c
>> ===================================================================
>> --- kvm.orig/arch/x86/kvm/mmu.c
>> +++ kvm/arch/x86/kvm/mmu.c
>> @@ -1254,7 +1254,7 @@ static struct kvm_mmu_page *kvm_mmu_get_
>>        pgprintk("%s: adding gfn %lx role %x\n", __func__, gfn, role.word);
>>        sp->gfn = gfn;
>>        sp->role = role;
>> -       sp->global = role.cr4_pge;
>> +       sp->global = 0;
>>        hlist_add_head(&sp->hash_link, bucket);
>>        if (!direct) {
>>                if (rmap_write_protect(vcpu->kvm, gfn))
>>
>> david
>>
>>
>> Dongsheng Song wrote:
>>> 2009/4/16 Brian Jackson <iggy@theiggy.com>:
>>>> it's a module option to the kvm option.
>>>>
>>>> parm:           oos_shadow:bool
>>>>
>>> When I set 'oos_shadow=Y' for kvm-84 module, OpenBSD 4.5 stopped
>>> after display 'clock: unknown CMOS layout'.
>>>
>>> When I set 'oos_shadow=N' for kvm-84 module, OpenBSD 4.5 go farther,
>>> stopped after display 'setting ttty flags'.
>>>
>>> Both dmesg display like this:
>>>
>>> Apr 17 09:16:58 dl kernel: [47761.218611] __ratelimit: 1216720
>>> messages suppressed
>>> Apr 17 09:16:58 dl kernel: [47761.218611] emulation failed (pagetable)
>>> rip d0491096 c9 c3 8a 04
>>>
>>> --
>>> Dongsheng Song