[PATCH] ARM64:DMI: Add smbios/dmi support on arm64
mark.rutland at arm.com
Wed Jun 4 06:32:01 PDT 2014
On Tue, Jun 03, 2014 at 04:57:13PM +0100, Yi Li wrote:
> Add smbios/dmi support on arm64 system, it depends on
> EFI boot.
And what exactly does this provide us with?
What is exposed through SMBIOS/DMI, and why would I want to enable it?
> Signed-off-by: Yi Li <yi.li at linaro.org>
> Changes since v1:
> -Followed Ard Biesheuvel's suggestion to rebase the patch on
> Matt Fleming's arm64-efi branch.
> arch/arm64/Kconfig | 10 ++++++++++
> arch/arm64/include/asm/dmi.h | 28 ++++++++++++++++++++++++++++
> arch/arm64/kernel/setup.c | 2 ++
> 3 files changed, 40 insertions(+)
> create mode 100644 arch/arm64/include/asm/dmi.h
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 6c71f12..13ee261 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -294,6 +294,16 @@ config EFI
> allow the kernel to be booted as an EFI application. This
> is only useful on systems that have UEFI firmware.
> +config DMI
> + bool "Enable support for SMBIOS (DMI) tables"
> + depends on EFI
> + default y
> + help
> + This enables SMBIOS/DMI feature for systems.
> + This option is only useful on systems that have UEFI firmware.
> + However, even with this option, the resultant kernel should
> + continue to boot on existing non-UEFI platforms.
> menu "Userspace binary formats"
> diff --git a/arch/arm64/include/asm/dmi.h b/arch/arm64/include/asm/dmi.h
> new file mode 100644
> index 0000000..f2198bf
> --- /dev/null
> +++ b/arch/arm64/include/asm/dmi.h
> @@ -0,0 +1,28 @@
> + * arch/arm64/include/asm/dmi.h
> + *
> + * Copyright (C) 2013 Linaro Limited.
> + * Written by: Yi Li (yi.li at linaro.org)
> + *
> + * based on arch/ia64/include/asm/dmi.h
> + *
> + * This file is subject to the terms and conditions of the GNU General Public
> + * License. See the file "COPYING" in the main directory of this archive
> + * for more details.
> + */
> +#ifndef _ASM_DMI_H
> +#define _ASM_DMI_H 1
> +#include <linux/slab.h>
> +#include <asm/io.h>
Shouldn't that be linux/efi.h?
Why do we need asm/io.h?
> +/* Use efi mappings for DMI */
> +#define dmi_early_remap(x, l) efi_lookup_mapped_addr(x)
> +#define dmi_early_unmap(x, l)
> +#define dmi_remap(x, l) efi_lookup_mapped_addr(x)
> +#define dmi_unmap(x)
> +#define dmi_alloc(l) kzalloc(l, GFP_ATOMIC)
None of these seem to use anything from io.h directly.
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