Groups > linux.kernel > #1206568

Re: [PATCH 1/2] KVM: x86: set TMR when the interrupt is accepted

From	Paolo Bonzini <pbonzini@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/2] KVM: x86: set TMR when the interrupt is accepted
Date	2015-08-13 09:40 +0200
Message-ID	<pWVhg-53B-29@gated-at.bofh.it> (permalink)
References	(6 earlier) <pTlah-fp-9@gated-at.bofh.it> <pTlDk-NT-1@gated-at.bofh.it> <pTyAy-2Qy-5@gated-at.bofh.it> <pTEwh-3hI-15@gated-at.bofh.it> <pWUlc-3IA-29@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw


On 13/08/2015 08:35, Zhang, Yang Z wrote:
>> You may be right. It is safe if no future hardware plans to use
>> it. Let me check with our hardware team to see whether it will be
>> used or not in future.
> 
> After checking with Jun, there is no guarantee that the guest running
> on another CPU will operate properly if hypervisor modify the vTMR
> from another CPU. So the hypervisor should not to do it.

I guess I can cause a vmexit on level-triggered interrupts, it's not a
big deal, but no weasel words, please.

What's going to break, and where is it documented?

Paolo
--
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/

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

RE: [PATCH 1/2] KVM: x86: set TMR when the interrupt is accepted "Zhang, Yang Z" <yang.z.zhang@intel.com> - 2015-08-13 08:40 +0200
  Re: [PATCH 1/2] KVM: x86: set TMR when the interrupt is accepted Paolo Bonzini <pbonzini@redhat.com> - 2015-08-13 09:40 +0200

csiph-web