linux-kernel - Re: [PATCH v2 1/4] x86/efi: show actual ending addresses in efi_print

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Date:	Fri, 8 Jan 2016 12:04:48 +0000
From:	Matt Fleming <matt@...eblueprint.co.uk>
To:	Robert Elliott <elliott@....com>
Cc:	tglx@...utronix.de, mingo@...nel.org, hpa@...or.com,
	x86@...nel.org, linux-efi@...r.kernel.org,
	linux-kernel@...r.kernel.org, ard.biesheuvel@...aro.org,
	leif.lindholm@...aro.org
Subject: Re: [PATCH v2 1/4] x86/efi: show actual ending addresses in
 efi_print_memmap

On Wed, 23 Dec, at 07:07:23PM, Robert Elliott wrote:
> Adjust efi_print_memmap to print the real end address of each
> range, not 1 byte beyond. This matches other prints like those for
> SRAT and nosave memory.
> 
> While investigating grub persistent memory corruption issues, it
> was helpful to make this table match the ending address convention
> used by:
> * the kernel's e820 table prints
> 	BIOS-e820: [mem 0x0000001680000000-0x0000001c7fffffff] reserved
> * the kernel's nosave memory prints
> 	PM: Registered nosave memory: [mem 0x880000000-0xc7fffffff]
> * the kernel's ACPI System Resource Affinity Table prints
> 	SRAT: Node 1 PXM 1 [mem 0x480000000-0x87fffffff]
> * grub's lsmmap and lsefimmap commands
> 	reserved  0000001680000000-0000001c7fffffff 00600000     24GiB UC WC WT WB NV
> * the UEFI shell's memmap command
> 	Reserved   000000007FC00000-000000007FFFFFFF 0000000000000400 0000000000000001
> 
> For example, if you grep all the various logs for c7fffffff, you
> won't find the kernel's line if it uses c80000000.
> 
> Also, change the closing ) to ] to match the opening [.
> 
> old:
>     efi: mem61: [Persistent Memory  |   |  |  |  |  |  |   |WB|WT|WC|UC] range=[0x0000000880000000-0x0000000c80000000) (16384MB)
> 
> new:
>     efi: mem61: [Persistent Memory  |   |  |  |  |  |  |   |WB|WT|WC|UC] range=[0x0000000880000000-0x0000000c7fffffff] (16384MB)
> 
> Signed-off-by: Robert Elliott <elliott@....com>
> ---
> Changes in v2:
>  - Expanded rationale in the commit message
> ---
>  arch/x86/platform/efi/efi.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Thanks Robert, I've queued this up for v4.6.