[PATCH v2 4/9] arm64/mirror: arm64 enabling - find mirrored memory ranges

[Wupeng Ma <mawupeng1@huawei.com>]

From: Ma Wupeng <mawupeng1@huawei.com>

Commit b05b9f5f9dcf ("x86, mirror: x86 enabling - find mirrored memory ranges")
introduced mirrored memory support for x86 and this could be used on arm64.

So efi_find_mirror() is added in efi_init() so on EFI enabled systems scan
the memory map and tell memblock about any mirrored ranges.

Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
---
 Documentation/admin-guide/kernel-parameters.txt | 2 +-
 arch/arm64/kernel/setup.c                       | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index ea47c0ba7593..1d87dc4e3cef 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2270,7 +2270,7 @@
 
 	keepinitrd	[HW,ARM]
 
-	kernelcore=	[KNL,X86,IA-64,PPC]
+	kernelcore=	[KNL,X86,IA-64,PPC,ARM64]
 			Format: nn[KMGTPE] | nn% | "mirror"
 			This parameter specifies the amount of memory usable by
 			the kernel for non-movable allocations.  The requested
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index daade64889ff..3957290d9ade 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -345,6 +345,7 @@ void __init __no_sanitize_address setup_arch(char **cmdline_p)
 	arm64_memblock_init();
 
 	efi_fake_memmap();
+	efi_find_mirror();
 
 	paging_init();
 
-- 
2.18.0.huawei.25