RE: [PATCH V2 11/23] xen/ioreq: Move x86's io_completion/io_req fields to struct vcpu

[Paul Durrant <xadimgnik@xxxxxxxxx>]

> -----Original Message-----
> From: Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>
> Sent: 15 October 2020 17:44
> To: xen-devel@xxxxxxxxxxxxxxxxxxxx
> Cc: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>; Paul Durrant 
> <paul@xxxxxxx>; Jan Beulich
> <jbeulich@xxxxxxxx>; Andrew Cooper <andrew.cooper3@xxxxxxxxxx>; Roger Pau 
> Monné
> <roger.pau@xxxxxxxxxx>; Wei Liu <wl@xxxxxxx>; George Dunlap 
> <george.dunlap@xxxxxxxxxx>; Ian Jackson
> <iwj@xxxxxxxxxxxxxx>; Julien Grall <julien@xxxxxxx>; Stefano Stabellini 
> <sstabellini@xxxxxxxxxx>; Jun
> Nakajima <jun.nakajima@xxxxxxxxx>; Kevin Tian <kevin.tian@xxxxxxxxx>; Julien 
> Grall
> <julien.grall@xxxxxxx>
> Subject: [PATCH V2 11/23] xen/ioreq: Move x86's io_completion/io_req fields 
> to struct vcpu
> 
> From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
> 
> The IOREQ is a common feature now and these fields will be used
> on Arm as is. Move them to common struct vcpu as a part of new
> struct vcpu_io. Also move enum hvm_io_completion to xen/sched.h
> and remove "hvm" prefixes.
> 
> This patch completely removes layering violation in the common code.
> 
> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
> CC: Julien Grall <julien.grall@xxxxxxx>
> 
> ---
> Please note, this is a split/cleanup/hardening of Julien's PoC:
> "Add support for Guest IO forwarding to a device emulator"
> 
> ***
> I was thinking that it may be better to place these two fields
> into struct vcpu directly (without intermediate "io" struct).
> I think, this way the code which operates with these fields
> would become cleaner. Another possible option would be either
> to rename "io" struct (I failed to think of a better name) or
> to drop(replace?) duplicating "io" prefixes from these fields.

Just drop the 'io_' prefix from the field names.

  Paul