On Wed, 23 Oct 2024 at 20:47, Alex Bennée <alex.ben...@linaro.org> wrote:
> Agreed. However I think we were masking a calling issue that:
>
> /* Actual RAM size depends on initial RAM and device memory settings */
> [VIRT_MEM] = { GiB, LEGACY_RAMLIMIT_BYTES },
>
> And:
>
> -m 4G
>
> make no sense with no ARM_LPAE (which the kernel didn't have)
QEMU can't tell if the guest the user wants to boot
understands LPAE or not; it just provides the 4GB
of RAM, PCIe window above 4GB, etc, and describes them
in the dtb. It's up to the guest kernel to correctly
handle the >32bit addresses in the dtb, i.e. if it is
non-LPAE to ignore those resources it can't access
because they're out of range.
-- PMM
