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

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Subject: Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error
From: Vivek Goyal <vgoyal@xxxxxxxxxx>
Date: Tue, 6 Oct 2020 13:35:27 -0400
Cc: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>, kvm@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, virtio-fs-list <virtio-fs@xxxxxxxxxx>, pbonzini@xxxxxxxxxx
In-reply-to: <20201006171704.GC17610@linux.intel.com>
References: <20201005161620.GC11938@linux.intel.com> <20201006134629.GB5306@redhat.com> <877ds38n6r.fsf@vitty.brq.redhat.com> <20201006141501.GC5306@redhat.com> <874kn78l2z.fsf@vitty.brq.redhat.com> <20201006150817.GD5306@redhat.com> <871rib8ji1.fsf@vitty.brq.redhat.com> <20201006161200.GB17610@linux.intel.com> <87y2kj71gj.fsf@vitty.brq.redhat.com> <20201006171704.GC17610@linux.intel.com>

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

Follow-Ups:
- Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error
  - From: Sean Christopherson

References:
- Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error
  - From: Sean Christopherson
- Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error
  - From: Vivek Goyal
- Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error
  - From: Vitaly Kuznetsov
- Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error
  - From: Vivek Goyal
- Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error
  - From: Vitaly Kuznetsov
- Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error
  - From: Vivek Goyal
- Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error
  - From: Vitaly Kuznetsov
- Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error
  - From: Sean Christopherson
- Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error
  - From: Vitaly Kuznetsov
- Re: [PATCH v4] kvm,x86: Exit to user space in case page fault error
  - From: Sean Christopherson

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