After traversing the UEFI memory map to discover the regions that are backed
by normal RAM, register the resulting minimal memory map into the physmem
memblock table.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
---
arch/arm64/kernel/efi.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
index ba5fe66c3634..b1b816ecf3b3 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -155,6 +155,7 @@ static __init void reserve_regions(void)
{
efi_memory_desc_t *md;
u64 paddr, npages, size;
+ struct memblock_region *r;
if (uefi_debug)
pr_info("Processing EFI memory map:\n");
@@ -187,6 +188,14 @@ static __init void reserve_regions(void)
pr_cont("\n");
}
+ /*
+ * After memblock has stitched all the regions together, copy the
+ * resulting map of physical memory from the memory memblock table into
+ * the physmem memblock table.
+ */
+ for_each_memblock(memory, r)
+ memblock_add_phys(r->base, r->size);
+
set_bit(EFI_MEMMAP, &efi.flags);
}
--
1.8.3.2
--
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