linux-kernel - Re: [PATCH]x86 efi: do not export efi runtime map in case old map

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Date:	Mon, 2 Jun 2014 12:23:24 +0100
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Dave Young <dyoung@...hat.com>
Cc:	matt.fleming@...el.com, bp@...en8.de, linux-kernel@...r.kernel.org,
	linux-efi@...r.kernel.org, vgoyal@...hat.com
Subject: Re: [PATCH]x86 efi: do not export efi runtime map in case old map

On 30 May 2014 04:20, Dave Young <dyoung@...hat.com> wrote:
>
> For ioremapped efi memory aka old_map the virt addresses are not persistant
> across kexec reboot. kexec-tools will read the runtime maps from sysfs then
> pass them to 2nd kernel and assuming kexec efi boot is ok. This will cause
> kexec boot failure.
>
> To address this issue do not export runtime maps in case efi old_map so
> userspace can use no efi boot instead.
>
> Signed-off-by: Dave Young <dyoung@...hat.com>
> ---
>  arch/x86/platform/efi/efi.c | 3 +++
>  1 file changed, 3 insertions(+)

Thanks Dave, applied with acks.
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