genericarm64.conf: set runqemu memory config to 512 Mb

The genericarm64 initramfs is larger than 256 Mb which is
the default runqemu memory config and thus boot fails when
extracted initramfs does not fit.

Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
---
 meta-yocto-bsp/conf/machine/genericarm64.conf | 1 +
 1 file changed, 1 insertion(+)

On Tue, Dec 23, 2025 at 12:25 AM Mikko Rapeli via lists.yoctoproject.org
<mikko.rapeli=linaro.org@lists.yoctoproject.org> wrote:

> The genericarm64 initramfs is larger than 256 Mb which is
> the default runqemu memory config and thus boot fails when
> extracted initramfs does not fit.
>
> Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
> ---
>  meta-yocto-bsp/conf/machine/genericarm64.conf | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/meta-yocto-bsp/conf/machine/genericarm64.conf
> b/meta-yocto-bsp/conf/machine/genericarm64.conf
> index 5d1010e..ce22b17 100644
> --- a/meta-yocto-bsp/conf/machine/genericarm64.conf
> +++ b/meta-yocto-bsp/conf/machine/genericarm64.conf
> @@ -57,6 +57,7 @@ QB_MACHINE ?= "-machine virt"
>  QB_CPU ?= "-cpu cortex-a76"
>  QB_CPU_KVM ?= "-cpu host -machine gic-version=3"
>  QB_SMP ?= "-smp 4"
> +QB_MEM ?= "-m 512"
>

Some image recipes e.g. core-image-sato sets it conditionally like
QB_MEM = '${@bb.utils.contains("DISTRO_FEATURES", "opengl", "-m 512", "-m
256", d)}'

I wonder what happens with this change, will it get reset to 256 for
qemuarm64 when not using opengl ?


>  # Boot into U-Boot and let that scan the disk for the next step, don't
> pass any kernel or filesystem hints
>  QB_DEFAULT_BIOS ?= "u-boot.bin"
>  QB_DEFAULT_KERNEL ?= "none"
> --
> 2.34.1
>
>
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Hi,

On Tue, Dec 23, 2025 at 12:28:00PM -0800, Khem Raj wrote:
> On Tue, Dec 23, 2025 at 12:25 AM Mikko Rapeli via lists.yoctoproject.org
> <mikko.rapeli=linaro.org@lists.yoctoproject.org> wrote:
> 
> > The genericarm64 initramfs is larger than 256 Mb which is
> > the default runqemu memory config and thus boot fails when
> > extracted initramfs does not fit.
> >
> > Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
> > ---
> >  meta-yocto-bsp/conf/machine/genericarm64.conf | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/meta-yocto-bsp/conf/machine/genericarm64.conf
> > b/meta-yocto-bsp/conf/machine/genericarm64.conf
> > index 5d1010e..ce22b17 100644
> > --- a/meta-yocto-bsp/conf/machine/genericarm64.conf
> > +++ b/meta-yocto-bsp/conf/machine/genericarm64.conf
> > @@ -57,6 +57,7 @@ QB_MACHINE ?= "-machine virt"
> >  QB_CPU ?= "-cpu cortex-a76"
> >  QB_CPU_KVM ?= "-cpu host -machine gic-version=3"
> >  QB_SMP ?= "-smp 4"
> > +QB_MEM ?= "-m 512"
> >
> 
> Some image recipes e.g. core-image-sato sets it conditionally like
> QB_MEM = '${@bb.utils.contains("DISTRO_FEATURES", "opengl", "-m 512", "-m
> 256", d)}'

You are right, this overrides the value:

# $QB_MEM [5 operations]
#   set? /home/builder/src/gpit/build/../meta-yocto/meta-yocto-bsp/conf/machine/genericarm64.conf:60
#     "-m 512"
#   set /home/builder/src/gpit/build/../core/meta/recipes-sato/images/core-image-sato.bb:18
#     "${@bb.utils.contains("DISTRO_FEATURES", "opengl", "-m 512", "-m 256", d)}"
#   set? /home/builder/src/gpit/build/../core/meta/classes-recipe/qemuboot.bbclass:96
#     "-m 256"
#   override[qemuarmv5]:set /home/builder/src/gpit/build/../core/meta/recipes-sato/images/core-image-sato.bb:19
#     "-m 256"
#   override[qemumips]:set /home/builder/src/gpit/build/../core/meta/recipes-sato/images/core-image-sato.bb:20
#     "-m 256"
# pre-expansion value:
#   "${@bb.utils.contains("DISTRO_FEATURES", "opengl", "-m 512", "-m 256", d)}"
QB_MEM="-m 256"

So 256 Mb without opengl in DISTRO_FEATURES.

But the problem solved by this patch is core-image-minimal or other images
which do not set QB_MEM at all and thus rely on defaults from qemuboot.bbclass or
runqemu and they don't work on genericarm64 with a large initramfs. With this
patch they work:

# $QB_MEM [2 operations]
#   set? /home/builder/src/gpit/build/../meta-yocto/meta-yocto-bsp/conf/machine/genericarm64.conf:60
#     "-m 512"
#   set? /home/builder/src/gpit/build/../core/meta/classes-recipe/qemuboot.bbclass:96
#     "-m 256"
# pre-expansion value:
#   "-m 512"
QB_MEM="-m 512"

> I wonder what happens with this change, will it get reset to 256 for
> qemuarm64 when not using opengl ?

I guess you meant genericarm64 since qemuarm64 is not affected by this.
So without "opengl" in DISTRO_FEATURES the 256 Mb is set which is not
ok but I don't know how to fix that atm. genericarm64 enables "opengl"
and I don't see a need to test genericarm64 without "opengl" support.

Cheers,

-Mikko