linux-kernel - Re: [PATCH] x86, boot: Allow 64bit EFI kernel to be loaded above 4G

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Date:	Wed, 4 Feb 2015 21:25:26 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Dave Young <dyoung@...hat.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	Jonathan Corbet <corbet@....net>,
	Matt Fleming <matt.fleming@...el.com>,
	Kees Cook <keescook@...omium.org>,
	Junjie Mao <eternal.n08@...il.com>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86, boot: Allow 64bit EFI kernel to be loaded above 4G

On Wed, Feb 4, 2015 at 7:25 PM, Dave Young <dyoung@...hat.com> wrote:
>> After this patch, could use patched grub2-x86_64.efi to place
>> kernel/boot_params/cmd_line/initrd all above 4G and execute the kernel
>> above 4G.
>
> Can you share the grub2 patch for testing?

Please check attached 5 patches. last one is for debug purpose.

You need to apply them on top of

git://git.savannah.gnu.org/grub.git

plus  http://pkgs.fedoraproject.org/cgit/grub2.git/plain/0091-Add-support-for-linuxefi.patch

View attachment "ramdisk_above_4g_7_1.patch" of type "text/x-patch" (1877 bytes)

View attachment "ramdisk_above_4g_7_2.patch" of type "text/x-patch" (5110 bytes)

View attachment "ramdisk_above_4g_7_3.patch" of type "text/x-patch" (1851 bytes)

View attachment "ramdisk_above_4g_7_4.patch" of type "text/x-patch" (8521 bytes)

View attachment "ramdisk_above_4g_7_5.patch" of type "text/x-patch" (2822 bytes)