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H A D | x86-stub.c | 2e9f46ee Tue Jun 06 09:26:30 CDT 2023 Kirill A. Shutemov <kirill.shutemov@linux.intel.com> efi/x86: Get full memory map in allocate_e820()
Currently allocate_e820() is only interested in the size of map and size of memory descriptor to determine how many e820 entries the kernel needs.
UEFI Specification version 2.9 introduces a new memory type -- unaccepted memory. To track unaccepted memory, the kernel needs to allocate a bitmap. The size of the bitmap is dependent on the maximum physical address present in the system. A full memory map is required to find the maximum address.
Modify allocate_e820() to get a full memory map.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Borislav Petkov <bp@suse.de> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20230606142637.5171-3-kirill.shutemov@linux.intel.com
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