>>> On 14.01.16 at 09:35, <roger....@citrix.com> wrote: > El 13/01/16 a les 17.48, Paul Durrant ha escrit: >>> -----Original Message----- >>> From: Jan Beulich [mailto:jbeul...@suse.com] >>> Sent: 13 January 2016 16:39 >>> To: Paul Durrant; Roger Pau Monne >>> Cc: Andrew Cooper; xen-de...@lists.xenproject.org >>> Subject: Re: [PATCH 5/5] x86/HVM: don't setup an intercept handler for IO >>> port 0xcf8 unconditionally >>> >>>>>> On 13.01.16 at 13:32, <roger....@citrix.com> wrote: >>>> Only intercept accesses to IO port 0xcf8 if there's at least one IOREQ >>>> server, otherwise it makes no sense since the only code that uses the value >>>> stored by hvm_access_cf8 is the IOREQ server. >>> >>> Afaict an ioreq server could also attach subsequently - Paul? >>> >> >> Indeed, ioreq servers can come and go at any time. > > Right, then I will have to prevent hvm_access_cf8 from being added if > the domain is the hardware domain, otherwise it overlaps with the Dom0 > passthrough intercept (handle_pvh_io).
Yes, that indeed makes sense. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
