[PATCH 2/3] ARM64:DMI: Add smbios/dmi support on arm64
Grant Likely
grant.likely at linaro.org
Wed Nov 27 09:24:37 EST 2013
On Tue, 26 Nov 2013 00:44:25 +0800, Yi Li <yi.li at linaro.org> wrote:
> Add smbios/dmi support on arm64 system, it depends on
> EFI boot.
>
> Signed-off-by: Yi Li <yi.li at linaro.org>
> ---
>
> efi_lookup_mapped_addr() isn't able to translate the address range
> which is reported as reserved type from UEFI. Following the UEFI
> spec 2.4, it descripts the SMBIOS data should be runtime service
> type. So it depends on a UEFI patch to convert reserved type to
> runtime service type for SMBIOS and a linux dmi driver patch that
> has been posted for review to x86 and ia64.
>
> 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 d5aaddf..84204b0 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -292,6 +292,16 @@ config EFI_STUB
> by EFI firmware without the use of a bootloader.
> See Documentation/efi-stub.txt for more information.
>
> +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.
> endmenu
>
> 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..f6e6004
> --- /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>
> +
> +/* Use normal IO 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)
> +
> +#endif
> diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
> index 1aeaaf5..1480843 100644
> --- a/arch/arm64/kernel/setup.c
> +++ b/arch/arm64/kernel/setup.c
> @@ -45,6 +45,7 @@
> #ifdef CONFIG_ACPI
> #include <linux/acpi.h>
> #endif
> +#include <linux/dmi.h>
>
> #include <asm/fixmap.h>
> #include <asm/cputype.h>
Nitpick: You dropped a blank line in this hunk. I suspect that was
unintentional, but it looks sloppy.
Otherwise:
Acked-by: Grant Likely <grant.likely at linaro.org>
> @@ -312,6 +313,7 @@ static int __init arm64_device_init(void)
> {
> of_clk_init(NULL);
> of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
> + dmi_scan_machine();
> return 0;
> }
> arch_initcall(arm64_device_init);
> --
> 1.7.9.5
>
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