From: Bandan Das <bsd@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm <kvm@vger.kernel.org>
Subject: Re: x86: Don't report guest userspace emulation error to userspace, why ?
Date: Thu, 10 Dec 2015 13:36:14 -0500 [thread overview]
Message-ID: <jpg4mfqywv5.fsf@linux.bootlegged.copy> (raw)
In-Reply-To: <5669BD73.7030902@redhat.com> (Paolo Bonzini's message of "Thu, 10 Dec 2015 18:59:15 +0100")
Paolo Bonzini <pbonzini@redhat.com> writes:
> On 10/12/2015 18:58, Bandan Das wrote:
>>> > Allowing userspace to stop the guest with an emulation failure is a
>> This one I don't :) Userspace started the guest after all, there are other
>> ways for it to kill the guest if it wanted to.
>
> I mean allowing guest userspace to stop the guest.
Sure! Userspace (Qemu) can just reenter the guest when it sees the failure.
Doing it in the host kvm seems overkill.
> Paolo
>
>>> > possible denial of service, similar to L2 stopping L1 with an emulation
>>> > failure.
next prev parent reply other threads:[~2015-12-10 18:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-09 22:18 x86: Don't report guest userspace emulation error to userspace, why ? Bandan Das
2015-12-10 9:12 ` Paolo Bonzini
2015-12-10 17:58 ` Bandan Das
2015-12-10 17:59 ` Paolo Bonzini
2015-12-10 18:36 ` Bandan Das [this message]
2015-12-10 20:20 ` Paolo Bonzini
2015-12-10 20:35 ` Bandan Das
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