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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2023-06-06 16:26:33 +0200 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-06-06 17:22:20 +0200 |
| commit | 2053bc57f36763febced0b5cd91821698bcf6b3d (patch) | |
| tree | 731f4d2730f6284343c1fd63f73bdac65ff0558f /arch/x86/platform | |
| parent | x86/boot/compressed: Handle unaccepted memory (diff) | |
| download | linux-2053bc57f36763febced0b5cd91821698bcf6b3d.tar.xz linux-2053bc57f36763febced0b5cd91821698bcf6b3d.zip | |
efi: Add unaccepted memory support
efi_config_parse_tables() reserves memory that holds unaccepted memory
configuration table so it won't be reused by page allocator.
Core-mm requires few helpers to support unaccepted memory:
- accept_memory() checks the range of addresses against the bitmap and
accept memory if needed.
- range_contains_unaccepted_memory() checks if anything within the
range requires acceptance.
Architectural code has to provide efi_get_unaccepted_table() that
returns pointer to the unaccepted memory configuration table.
arch_accept_memory() handles arch-specific part of memory acceptance.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20230606142637.5171-6-kirill.shutemov@linux.intel.com
Diffstat (limited to 'arch/x86/platform')
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index f3f2d87cce1b..e9f99c56f3ce 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -96,6 +96,9 @@ static const unsigned long * const efi_tables[] = { #ifdef CONFIG_EFI_COCO_SECRET &efi.coco_secret, #endif +#ifdef CONFIG_UNACCEPTED_MEMORY + &efi.unaccepted, +#endif }; u64 efi_setup; /* efi setup_data physical address */ |