[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [PATCH V4 04/24] xen/ioreq: Make x86's IOREQ feature common
> -----Original Message----- > From: Oleksandr Tyshchenko <olekstysh@xxxxxxxxx> > Sent: 12 January 2021 21:52 > To: xen-devel@xxxxxxxxxxxxxxxxxxxx > Cc: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>; Andrew Cooper > <andrew.cooper3@xxxxxxxxxx>; > George Dunlap <george.dunlap@xxxxxxxxxx>; Ian Jackson <iwj@xxxxxxxxxxxxxx>; > Jan Beulich > <jbeulich@xxxxxxxx>; Julien Grall <julien@xxxxxxx>; Stefano Stabellini > <sstabellini@xxxxxxxxxx>; Wei > Liu <wl@xxxxxxx>; Roger Pau Monné <roger.pau@xxxxxxxxxx>; Paul Durrant > <paul@xxxxxxx>; Jun Nakajima > <jun.nakajima@xxxxxxxxx>; Kevin Tian <kevin.tian@xxxxxxxxx>; Tim Deegan > <tim@xxxxxxx>; Julien Grall > <julien.grall@xxxxxxx> > Subject: [PATCH V4 04/24] xen/ioreq: Make x86's IOREQ feature common > > From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx> > > As a lot of x86 code can be re-used on Arm later on, this patch > moves previously prepared IOREQ support to the common code > (the code movement is verbatim copy). > > The "legacy" mechanism of mapping magic pages for the IOREQ servers > remains x86 specific and not exposed to the common code. > > The common IOREQ feature is supposed to be built with IOREQ_SERVER > option enabled, which is selected for x86's config HVM for now. > > In order to avoid having a gigantic patch here, the subsequent > patches will update remaining bits in the common code step by step: > - Make IOREQ related structs/materials common > - Drop the "hvm" prefixes and infixes > - Remove layering violation by moving corresponding fields > out of *arch.hvm* or abstracting away accesses to them > > Also include <xen/domain_page.h> which will be needed on Arm > to avoid touch the common code again when introducing Arm specific bits. > > This support is going to be used on Arm to be able run device > emulator outside of Xen hypervisor. > > Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx> Reviewed-by: Paul Durrant <paul@xxxxxxx>
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