linux-kernel - Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error

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Message-ID: <20201006173527.GG5306@redhat.com>
Date:   Tue, 6 Oct 2020 13:35:27 -0400
From:   Vivek Goyal <vgoyal@...hat.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Vitaly Kuznetsov <vkuznets@...hat.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        virtio-fs-list <virtio-fs@...hat.com>, pbonzini@...hat.com
Subject: Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error

On Tue, Oct 06, 2020 at 10:17:04AM -0700, Sean Christopherson wrote:

[..]
> > > Note, TDX doesn't allow injection exceptions, so reflecting a #PF back
> > > into the guest is not an option.  
> > 
> > Not even #MC? So sad :-)
> 
> Heh, #MC isn't allowed either, yet...

If #MC is not allowd, logic related to hwpoison memory will not work
as that seems to inject #MC.

Vivek