Re: [poky] [PATCH v4] Add genericarm64 MACHINE

On Thu, Feb 29, 2024 at 01:43:10PM -0600, Mark Hatle wrote:
> On 2/29/24 10:24 AM, Ross Burton wrote:
> > From: Ross Burton <[email protected]>
> > 
> > This is a new 64-bit "generic" Arm machine, that expects the hardware to
> > be SystemReady compatible.
> > 
> > Signed-off-by: Ross Burton <[email protected]>
> > ---
> >   .../conf/templates/default/local.conf.sample  |  1 +
> >   meta-yocto-bsp/README.hardware.md             | 18 ++++++++++-
> >   meta-yocto-bsp/conf/machine/genericarm64.conf | 31 +++++++++++++++++++
> >   .../linux/linux-yocto_6.6.bbappend            |  5 +++
> >   meta-yocto-bsp/wic/genericarm64.wks.in        | 11 +++++++
> >   5 files changed, 65 insertions(+), 1 deletion(-)
> >   create mode 100644 meta-yocto-bsp/conf/machine/genericarm64.conf
> >   create mode 100644 meta-yocto-bsp/wic/genericarm64.wks.in
> 
> ...
> 
> > +SystemReady Arm Platforms
> > +=========================
> > +
> > +The genericarm64 MACHINE is designed to work on standard SystemReady IR/SR
> > +compliant boards with preinstalled firmware.
> > +
> > +The genericarm64 MACHINE is currently tested on the following platforms:
> > +
> > +  * Texas Instruments BeaglePlay (IR)
> > +
> > +The images built are EFI bootable disk images and can be written directly to a
> > +SD card for booting, for example.
> > +
> > +
> >   Texas Instruments Beaglebone (beaglebone-yocto)
> >   ===============================================
> > diff --git a/meta-yocto-bsp/conf/machine/genericarm64.conf b/meta-yocto-bsp/conf/machine/genericarm64.conf
> > new file mode 100644
> > index 00000000000..33ffa3fc019
> > --- /dev/null
> > +++ b/meta-yocto-bsp/conf/machine/genericarm64.conf
> > @@ -0,0 +1,31 @@
> > +#@TYPE: Machine
> > +#@NAME: genericarm64
> > +#@DESCRIPTION: Generic Arm64 machine for typical SystemReady IR/ES platforms, which
> > +#have working firmware and boot via EFI.
> > +
> > +require conf/machine/include/arm/arch-armv8a.inc
> > +
> > +# Arm Base System Architecture says v8.0+ is allowed, but FEAT_CRC32 is required
> > +DEFAULTTUNE = "armv8a-crc"
> > +
> > +MACHINE_FEATURES = "acpi alsa bluetooth efi keyboard pci qemu-usermode rtc screen usbhost vfat wifi"
> 
> SystemReady IR supports u-boot booting, as far as I'm aware, but this looks
> like it now requires (vs allows) EFI.  Is this the case, or am I reading it
> wrong?

IR supports U-Boot because U-Boot does (a subset of) UEFI.

As a tangent, ES is a harder ask for us but not out of the question.

-- 
Tom