It is not currently possible to execute the kernel in-place without loading it. Use lmb to allocate memory for it.
Co-developed-by: Tom Rini trini@konsulko.com Signed-off-by: Tom Rini trini@konsulko.com Signed-off-by: Simon Glass sjg@chromium.org Suggested-by: Tom Rini trini@konsulko.com ---
Changes in v3: - Rebase on to bootm-refactoring series - Support compression with an lmb-allocated region - Drop patch to disallow kernel_noload with compression - Drop patch 'bootm: Allow omitting the load address'
Changes in v2: - Add a 'success' case to the cover letter - Redo how the arm64 support is implemented
boot/bootm.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/boot/bootm.c b/boot/bootm.c index cf07c042fbca..301cfded05cb 100644 --- a/boot/bootm.c +++ b/boot/bootm.c @@ -629,6 +629,24 @@ static int bootm_load_os(struct bootm_headers *images, int boot_progress) void *load_buf, *image_buf; int err;
+ /* + * For a "noload" compressed kernel we need to allocate a buffer large + * enough to decompress in to and use that as the load address now. + * Assume that the kernel compression is at most a factor of 4 since + * zstd almost achieves that. + * Use an alignment of 2MB since this might help arm64 + */ + if (os.type == IH_TYPE_KERNEL_NOLOAD && os.comp != IH_COMP_NONE) { + ulong req_size = ALIGN(image_len * 4, SZ_1M); + + load = lmb_alloc(&images->lmb, req_size, SZ_2M); + if (!load) + return 1; + os.load = load; + debug("Allocated %lx bytes at %lx for kernel (size %lx) decompression\n", + req_size, load, image_len); + } + load_buf = map_sysmem(load, 0); image_buf = map_sysmem(os.image_start, image_len); err = image_decomp(os.comp, load, os.image_start, os.type,