On 16.12.14 13:18, Peter Maydell wrote: > On 16 December 2014 at 12:15, Alexander Graf <ag...@suse.de> wrote: >> I don't understand this. On AArch64 I can simply do -kernel Image and it >> boots without decompressing anything, no? > > Yes, but if you pass -kernel Image.gz then it won't work unless the > bootloader (ie QEMU) does the decompression for you. AArch64 differs > from AArch32 here (on 32-bit compressed images have their own builtin > decompressor; on 64-bit this is made the job of the boot loader). > We could choose not to support loading compressed images, but that > would be annoying for users (most other bootloaders do). See > commit 6f5d3cbe88 where we added this support.
The patch as is assumes that AArch64 images are always gzipped. I don't think this assumption is correct - if you do "make Image" on a kernel source tree, you will get an uncompressed Image file. I think we'd be better off trying to load it as gzip and if it's not gzipped, fall back to linear load. Alex
