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

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 13/01/16 16:38, Jan Beulich wrote:
>>>> 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 it can.

The last-latched cfc/cf8 values should be accurate at that point.  The
intercept needs to stay.

~Andrew

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