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machine/qemuarm*: don't explicitly set vmalloc

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In 5c6064 the qemuarm* machines gained vmalloc=256, because in testing
Bruce was seeing problems when the vmalloc area was too big for the
memory size of the machine (eg 256MB).

The intention was for the area to be very small, but 256 bytes is too
small and the kernel sets a minimal vmalloc area of 16MiB:

[    0.000000] vmalloc area is too small, limiting to 16MiB

However, a 16MiB area is too small and results in pages of messages when
you try and use the system:

[  242.822481] vmap allocation for size 4100096 failed: use vmalloc=<size> to increase size

There have been a number of changes since this commit, remove the
explicit vmalloc argument and use the default.  I've tested that the
system still boots locally.

[1] early_vmalloc(), https://elixir.bootlin.com/linux/latest/source/arch/arm/mm/mmu.c#L1170
(From OE-Core rev: 816dd95320ba2e4a0f6b816e4f58999c0f235ae2)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Ross Burton 2023-04-18 17:41:00 +01:00 committed by Richard Purdie
parent c1e24cee0e
commit 78ddb9f87e
2 changed files with 0 additions and 3 deletions
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2
meta/conf/machine/qemuarm.conf
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@ -17,8 +17,6 @@ QB_SYSTEM_NAME = "qemu-system-arm"
QB_MACHINE = "-machine virt,highmem=off"
QB_CPU = "-cpu cortex-a15"
QB_SMP ?= "-smp 4"
# Standard Serial console
QB_KERNEL_CMDLINE_APPEND = "vmalloc=256"
# For graphics to work we need to define the VGA device as well as the necessary USB devices
QB_GRAPHICS = "-device virtio-gpu-pci"
QB_OPT_APPEND = "-device qemu-xhci -device usb-tablet -device usb-kbd"

1
meta/conf/machine/qemuarmv5.conf
View File

@ -12,7 +12,6 @@ SERIAL_CONSOLES ?= "115200;ttyAMA0 115200;ttyAMA1"
# For runqemu
QB_SYSTEM_NAME = "qemu-system-arm"
QB_MACHINE = "-machine versatilepb"
QB_KERNEL_CMDLINE_APPEND = "vmalloc=256"
QB_GRAPHICS = "-device virtio-gpu-pci"
QB_OPT_APPEND = "-device qemu-xhci -device usb-tablet -device usb-kbd"
QB_DTB = "${@oe.utils.version_less_or_equal('PREFERRED_VERSION_linux-yocto', '4.7', '', 'zImage-versatile-pb.dtb', d)}"