On Fri, 24 Jul, at 01:38:27PM, Ard Biesheuvel wrote: > When allocating memory for the kernel image, try the AllocatePages() > boot service to obtain memory at the preferred offset of > 'dram_base + TEXT_OFFSET', and only revert to efi_low_alloc() if that > fails. This is the only way to allocate at the base of DRAM if DRAM > starts at 0x0, since efi_low_alloc() refuses to allocate at 0x0. > > Tested-by: Haojian Zhuang <haojian.zhuang@xxxxxxxxxx> > Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> > --- > v2: > - reshuffle code flow to make it more logical, and have only a single > memcpy() invocation at the end of the function > --- > arch/arm64/kernel/efi-stub.c | 41 ++++++++++++++++++++++++++++++++--------- > 1 file changed, 32 insertions(+), 9 deletions(-) Would it be easier if we allow efi_low_alloc() to return 0x0 for some uses? If you don't need the preference for low allocations, probably not, but I don't want to see us working around limitations in efi_low_alloc() instead of just fixing it. -- Matt Fleming, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
