ARM: 9255/1: efi/dump UEFI runtime page tables for ARM

UEFI runtime page tables dump only for ARM64 at present,
but ARM support EFI and ARM_PTDUMP_DEBUGFS now. Since
ARM could potentially execute with a 1G/3G user/kernel
split, choosing 1G as the upper limit for UEFI runtime
end, with this, we could enable UEFI runtime page tables
on ARM.
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

arch/arm/include/asm/ptdump.h

@@ -21,6 +21,7 @@ struct ptdump_info {
 
 void ptdump_walk_pgd(struct seq_file *s, struct ptdump_info *info);
 #ifdef CONFIG_ARM_PTDUMP_DEBUGFS
+#define EFI_RUNTIME_MAP_END	SZ_1G
 void ptdump_debugfs_register(struct ptdump_info *info, const char *name);
 #else
 static inline void ptdump_debugfs_register(struct ptdump_info *info,

arch/arm64/include/asm/ptdump.h

@@ -23,6 +23,7 @@ struct ptdump_info {
 
 void ptdump_walk(struct seq_file *s, struct ptdump_info *info);
 #ifdef CONFIG_PTDUMP_DEBUGFS
+#define EFI_RUNTIME_MAP_END	DEFAULT_MAP_WINDOW_64
 void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name);
 #else
 static inline void ptdump_debugfs_register(struct ptdump_info *info,

drivers/firmware/efi/arm-runtime.c

@@ -25,14 +25,14 @@
 #include <asm/mmu.h>
 #include <asm/pgalloc.h>
 
-#if defined(CONFIG_PTDUMP_DEBUGFS) && defined(CONFIG_ARM64)
+#if defined(CONFIG_PTDUMP_DEBUGFS) || defined(CONFIG_ARM_PTDUMP_DEBUGFS)
 #include <asm/ptdump.h>
 
 static struct ptdump_info efi_ptdump_info = {
 	.mm		= &efi_mm,
 	.markers	= (struct addr_marker[]){
 		{ 0,				"UEFI runtime start" },
-		{ DEFAULT_MAP_WINDOW_64,	"UEFI runtime end" },
+		{ EFI_RUNTIME_MAP_END,		"UEFI runtime end" },
 		{ -1,				NULL }
 	},
 	.base_addr	= 0,