This patchset attempts to fix https://bugs.launchpad.net/qemu/+bug/1823998 which reports that we don't handle kernels larger than 128MB correctly, because we allow the initrd to be placed over the tail end of the kernel. AArch64 kernel Image files (since v3.17) report the total size they require (including any BSS area that isn't in the Image itself), so we can use that to be sure we place the initrd sufficiently far into the RAM.
Patch 1 in this series adjusts our "where do we put the initrd" heuristic so that it always places it at least after whatever our best guess at the kernel size is. (This might still not be right for images like self-decompressing 32-bit kernels, where there's no way to know how big the kernel will be after decompression.) Patch 2 makes load_aarch64_image() return the kernel size as indicated in the Image file header, so that for the specific case of AArch64 Image files we will definitely not put the initrd on top of them. I've given this a quick smoke test but I don't have a very large Image kernel to hand, so testing appreciated. thanks -- PMM Peter Maydell (2): hw/arm/boot: Avoid placing the initrd on top of the kernel hw/arm/boot: Honour image size field in AArch64 Image format kernels hw/arm/boot.c | 51 +++++++++++++++++++++++++++++++++++---------------- 1 file changed, 35 insertions(+), 16 deletions(-) -- 2.20.1