From: Marcelo Tosatti <mtosatti@redhat.com>
To: Gleb Natapov <gleb@qumranet.com>
Cc: avi@redhat.com, kvm@vger.kernel.org
Subject: Re: [PATCH] don't enter guest after SIPI was received by a CPU
Date: Mon, 22 Sep 2008 13:50:07 -0300 [thread overview]
Message-ID: <20080922165007.GB15498@dmt.cnet> (raw)
In-Reply-To: <20080922112853.GF27089@minantech.com>
Looks good. Thanks Gleb.
On Mon, Sep 22, 2008 at 02:28:53PM +0300, Gleb Natapov wrote:
> Don't enter guest after SIPI was issued.
>
> CPU should process SIPI message before entering a guest mode again.
> kvm_arch_vcpu_runnable() return true if CPU is in SIPI state, so
> we can't call it here.
>
> Signed-off-by: Gleb Natapov <gleb@qumranet.com>
>
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 61eddbe..612099f 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -3239,7 +3239,7 @@ static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
>
> r = 1;
> while (r > 0) {
> - if (kvm_arch_vcpu_runnable(vcpu))
> + if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE)
> r = vcpu_enter_guest(vcpu, kvm_run);
> else {
> up_read(&vcpu->kvm->slots_lock);
> --
> Gleb.
next prev parent reply other threads:[~2008-09-22 16:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-22 11:28 [PATCH] don't enter guest after SIPI was received by a CPU Gleb Natapov
2008-09-22 16:50 ` Marcelo Tosatti [this message]
2008-09-23 8:57 ` Avi Kivity
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