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-rw-r--r--arch/arm64/Kconfig11
-rw-r--r--arch/arm64/include/asm/dmi.h41
-rw-r--r--arch/arm64/kernel/setup.c2
3 files changed, 54 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index ce6e733e0c05..62a71e829770 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -311,6 +311,17 @@ 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.
+
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..b0882a8620e1
--- /dev/null
+++ b/arch/arm64/include/asm/dmi.h
@@ -0,0 +1,41 @@
+/*
+ * 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/slab.h>
+#include <linux/efi.h>
+
+static inline void __iomem *dmi_remap(u64 phys, u64 size)
+{
+ void __iomem *p = efi_lookup_mapped_addr(phys);
+
+ /*
+ * If the mapping spans multiple pages, do a minimal check to ensure
+ * that the mapping returned by efi_lookup_mapped_addr() covers the
+ * whole requested range (but ignore potential holes)
+ */
+ if ((phys & ~PAGE_MASK) + size > PAGE_SIZE
+ && (p + size - 1) != efi_lookup_mapped_addr(phys + size - 1))
+ return NULL;
+ return p;
+}
+
+/* Reuse existing UEFI mappings for DMI */
+#define dmi_alloc(l) kzalloc(l, GFP_KERNEL)
+#define dmi_early_remap(x, l) dmi_remap(x, l)
+#define dmi_early_unmap(x, l)
+#define dmi_unmap(x)
+
+#endif
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index f6f0ccf35ae6..35339a0e1592 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -43,6 +43,7 @@
#include <linux/of_fdt.h>
#include <linux/of_platform.h>
#include <linux/efi.h>
+#include <linux/dmi.h>
#include <asm/fixmap.h>
#include <asm/cpu.h>
@@ -413,6 +414,7 @@ void __init setup_arch(char **cmdline_p)
static int __init arm64_device_init(void)
{
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+ dmi_scan_machine();
return 0;
}
arch_initcall_sync(arm64_device_init);