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Re: [Xen-devel] [PATCH v2 REPOST 08/12] x86/hvm/ioreq: move is_default into struct hvm_ioreq_server

On Tue, Aug 22, 2017 at 03:51:02PM +0100, Paul Durrant wrote:
> Legacy emulators use the 'default' IOREQ server which has slightly
> different semantics than other, explicitly created, IOREQ servers.
> Because of this, most of the initialization and teardown code needs to
> know whether the server is default or not. This is currently achieved
> by passing an is_default boolean argument to the functions in question,
> whereas this argument could be avoided by adding a field to the
> hvm_ioreq_server structure which is also passed as an argument to all
> the relevant functions.
> Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>

This looks fine, I've also seen that there's a hvm_domain.default_ioreq_server, 
which is used in a bunch of loops in the file like:

if ( s == d->arch.hvm_domain.default_ioreq_server )

AFAICT those could also be replaced with s->is_default.


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