[Libguestfs] [V2V PATCH v4] parse_libvirt_xml: look for manual firmware in "/domain/os/loader/@type"

According to [1], there're different ways to specify which firmware is to be used by a libvirt-driven VM. Namely, there's an automatic firmware selection, e.g.: ... <os firmware='(bios|efi)'> ... and a manual one, e.g.: ... <os> <loader readonly='yes' type='pflash'>/usr/share/OVMF/OVMF_CODE.fd</loader> ... </os> ... with the latter being a way to specify UEFI firmware. So let's add this search path as well when parsing source VM's libvirt xml. [1] https://libvirt.org/formatdomain.html#bios-bootloader Co-authored-by: Laszlo Ersek <lersek(a)redhat.com&gt; Signed-off-by: Andrey Drobyshev <andrey.drobyshev(a)virtuozzo.com&gt; Originally-by: Denis Plotnikov <dplotnikov(a)virtuozzo.com&gt; --- input/parse_libvirt_xml.ml | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/input/parse_libvirt_xml.ml b/input/parse_libvirt_xml.ml index 56ce1c22..ab72c0ce 100644 --- a/input/parse_libvirt_xml.ml +++ b/input/parse_libvirt_xml.ml @@ -446,12 +446,23 @@ let parse_libvirt_xml ?conn xml = done; List.rev !nics in - (* Firmware. *) + (* Firmware. + * If "/domain/os" node doesn't contain "firmware" attribute (automatic + * firmware), we look for the presence of "pflash" in + * "/domain/os/loader/@type" attribute (manual firmware), with the latter + * indicating the UEFI firmware. + * See https://libvirt.org/formatdomain.html#bios-bootloader + *) let firmware = match xpath_string "/domain/os/@firmware" with | Some "bios" -> BIOS | Some "efi" -> UEFI - | None | Some _ -> UnknownFirmware in + | Some _ -> UnknownFirmware + | None -> ( + match xpath_string "/domain/os/loader/@type" with + | Some "pflash" -> UEFI + | _ -> UnknownFirmware + ) in (* Fallback to BIOS if we haven't found explicitly specified firmware. * This is VZ-specific since we're either using "/domain/os/loader" node -- 2.31.1