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). Roger. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
