Messages in this thread | | | Date | Thu, 12 Feb 2015 14:59:42 +0000 | From | Matt Fleming <> | Subject | Re: [PATCH] x86, boot: Allow 64bit EFI kernel to be loaded above 4G |
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On Wed, 11 Feb, at 11:29:58AM, Peter Jones wrote: > > From grub's point of view I'm not sure why we'd care - the pages kernel > and initramfs land in are both from the Boot Services allocator, so if the > machine doesn't support high addresses, they won't be there.
It's not that some implementations don't "support" higher addresses, it's that the EFI_FILE_PROTOCOL is buggy and it corrupts the memory when reading into it; you can allocate it just fine. At least, that's what I remember from the limited investigation I performed.
But since grub doesn't use EFI_FILE_PROTOCOL, we should be cool.
-- Matt Fleming, Intel Open Source Technology Center
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