Re: [Xen-devel] [PATCH 5/5] x86/HVM: don't setup an intercept handler for IO port 0xcf8 unconditionally

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
> Sent: 13 January 2016 16:39
> To: Paul Durrant; Roger Pau Monne
> Cc: Andrew Cooper; xen-devel@xxxxxxxxxxxxxxxxxxxx
> 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.pau@xxxxxxxxxx> 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.

  Paul

> Jan


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