diff options
| -rw-r--r-- | arch/arm64/Kconfig | 11 | ||||
| -rw-r--r-- | arch/arm64/include/asm/dmi.h | 31 | ||||
| -rw-r--r-- | arch/arm64/kernel/efi.c | 13 |
3 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 70b7d2e420f6..ce6ecfa7703b 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -520,6 +520,17 @@ config BUILD_ARM64_APPENDED_DTB_IMAGE_NAMES Space separated list of names of dtbs to append when building a concatenated Image.gz-dtb. +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 000000000000..69d37d87b159 --- /dev/null +++ b/arch/arm64/include/asm/dmi.h @@ -0,0 +1,31 @@ +/* + * arch/arm64/include/asm/dmi.h + * + * Copyright (C) 2013 Linaro Limited. + * Written by: Yi Li (yi.li@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 + +#include <linux/io.h> +#include <linux/slab.h> + +/* + * According to section 2.3.6 of the UEFI spec, the firmware should not + * request a virtual mapping for configuration tables such as SMBIOS. + * This means we have to map them before use. + */ +#define dmi_early_remap(x, l) ioremap_cache(x, l) +#define dmi_early_unmap(x, l) iounmap(x) +#define dmi_remap(x, l) ioremap_cache(x, l) +#define dmi_unmap(x) iounmap(x) +#define dmi_alloc(l) kzalloc(l, GFP_KERNEL) + +#endif diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c index 558572ef1ea3..9ae5e7918b8f 100644 --- a/arch/arm64/kernel/efi.c +++ b/arch/arm64/kernel/efi.c @@ -11,6 +11,7 @@ * */ +#include <linux/dmi.h> #include <linux/efi.h> #include <linux/export.h> #include <linux/memblock.h> @@ -469,3 +470,15 @@ err_unmap: return -1; } early_initcall(arm64_enter_virtual_mode); + +static int __init arm64_dmi_init(void) +{ + /* + * On arm64, DMI depends on UEFI, and dmi_scan_machine() needs to + * be called early because dmi_id_init(), which is an arch_initcall + * itself, depends on dmi_scan_machine() having been called already. + */ + dmi_scan_machine(); + return 0; +} +core_initcall(arm64_dmi_init); |