From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH] KVM: nVMX: remove side effects from nested_vmx_exit_reflected
Date: Wed, 18 Mar 2020 08:12:08 -0700 [thread overview]
Message-ID: <20200318151207.GA24357@linux.intel.com> (raw)
In-Reply-To: <803177a8-c5ef-ac5e-087b-52b09398d78c@redhat.com>
On Wed, Mar 18, 2020 at 11:59:13AM +0100, Paolo Bonzini wrote:
> On 18/03/20 11:52, Vitaly Kuznetsov wrote:
> > The only functional difference seems to be that we're now doing
> > nested_mark_vmcs12_pages_dirty() in vmx->fail case too and this seems
> > superfluous: we failed to enter L2 so 'special' pages should remain
> > intact (right?) but this should be an uncommon case.
> >
> > Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
>
> I'm not entirely sure if the PID could be written before the processor
> decrees a vmfail. It doesn't really hurt anyway as you say though.
I would expect that writing special pages on VM-Fail would be classified
as a CPU bug.
next prev parent reply other threads:[~2020-03-18 15:12 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-17 18:00 [PATCH] KVM: nVMX: remove side effects from nested_vmx_exit_reflected Paolo Bonzini
2020-03-18 10:52 ` Vitaly Kuznetsov
2020-03-18 10:59 ` Paolo Bonzini
2020-03-18 15:12 ` Sean Christopherson [this message]
2020-03-19 20:11 ` Krish Sadhukhan
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