> -----Original Message-----
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: 15 November 2018 12:52
> To: xen-devel <xen-devel@lists.xenproject.org>
> Cc: Andrew Cooper <andrew.coop...@citrix.com>; Paul Durrant
> <paul.durr...@citrix.com>; Roger Pau Monne <roger....@citrix.com>; Wei Liu
> <wei.l...@citrix.com>; Tim (Xen.org) <t...@xen.org>
> Subject: [PATCH v2 3/3] x86/shadow: emulate_gva_to_mfn() should respect
> p2m_ioreq_server
>
> Writes to such pages need to be handed to the emulator.
>
> Signed-off-by: Jan Beulich <jbeul...@suse.com>
Reviewed-by: Paul Durrant <paul.durr...@citrix.com>
> ---
> v2: Return BAD_GFN_TO_MFN instead.
>
> --- a/xen/arch/x86/mm/shadow/hvm.c
> +++ b/xen/arch/x86/mm/shadow/hvm.c
> @@ -338,6 +338,11 @@ static mfn_t emulate_gva_to_mfn(struct v
> {
> return _mfn(BAD_GFN_TO_MFN);
> }
> + if ( p2mt == p2m_ioreq_server )
> + {
> + put_page(page);
> + return _mfn(BAD_GFN_TO_MFN);
> + }
> if ( p2m_is_discard_write(p2mt) )
> {
> put_page(page);
>
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