linux-kernel - Re: [patch 2/6] x86 efi: reserve boot service fix

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Date:	Mon, 28 Oct 2013 09:44:41 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Dave Young <dyoung@...hat.com>
Cc:	Matt Fleming <matt@...sole-pimps.org>,
	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
	x86@...nel.org, mjg59@...f.ucam.org, hpa@...or.com,
	James.Bottomley@...senPartnership.com, vgoyal@...hat.com,
	ebiederm@...ssion.com, horms@...ge.net.au,
	kexec@...ts.fedoraproject.org, kexec@...ts.infradead.org
Subject: Re: [patch 2/6] x86 efi: reserve boot service fix

On Mon, Oct 28, 2013 at 09:18:24AM +0800, Dave Young wrote:
> There should be some people see below message with non-kexec kernel:
> "Could not reserve boot range ..."

I can find one other report like that: https://lkml.org/lkml/2013/7/16/309

[    0.000000] efi: Could not reserve boot range [0x0000000000-0x0000000fff]

for

efi: mem00: type=3, attr=0xf, range=[0x0000000000000000-0x0000000000001000) (0MB)

which is EFI_BOOT_SERVICES_CODE and

efi: Could not reserve boot range [0x000005f000-0x000009ffff]

for

efi: mem06: type=3, attr=0xf, range=[0x000000000005f000-0x00000000000a0000) (0MB)

which is of the same type.

> But it's hard for them to notice the bad functionality because
> it's only one mem range which might be not the boot range what
> SetVirtualAddressMap need

Right.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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