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| author | Ingo Molnar <mingo@kernel.org> | 2020-05-25 15:10:37 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-05-25 15:10:37 +0200 |
| commit | a5d8e55b2c7d3d18d7837af0ef8d1477eeeb919c (patch) | |
| tree | fe07d3af2f6f13d005da832fe3d18d5d257fb9bd /drivers/firmware/efi/libstub/efistub.h | |
| parent | efi/libstub: Re-enable command line initrd loading for x86 (diff) | |
| parent | Linux 5.7-rc7 (diff) | |
| download | linux-a5d8e55b2c7d3d18d7837af0ef8d1477eeeb919c.tar.xz linux-a5d8e55b2c7d3d18d7837af0ef8d1477eeeb919c.zip | |
Merge tag 'v5.7-rc7' into efi/core, to refresh the branch and pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/firmware/efi/libstub/efistub.h')
| -rw-r--r-- | drivers/firmware/efi/libstub/efistub.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h index 5ff63230a1f1..7ebc248486d1 100644 --- a/drivers/firmware/efi/libstub/efistub.h +++ b/drivers/firmware/efi/libstub/efistub.h @@ -102,6 +102,19 @@ extern const efi_system_table_t *efi_system_table; #define EFI_LOCATE_BY_REGISTER_NOTIFY 1 #define EFI_LOCATE_BY_PROTOCOL 2 +/* + * An efi_boot_memmap is used by efi_get_memory_map() to return the + * EFI memory map in a dynamically allocated buffer. + * + * The buffer allocated for the EFI memory map includes extra room for + * a minimum of EFI_MMAP_NR_SLACK_SLOTS additional EFI memory descriptors. + * This facilitates the reuse of the EFI memory map buffer when a second + * call to ExitBootServices() is needed because of intervening changes to + * the EFI memory map. Other related structures, e.g. x86 e820ext, need + * to factor in this headroom requirement as well. + */ +#define EFI_MMAP_NR_SLACK_SLOTS 8 + struct efi_boot_memmap { efi_memory_desc_t **map; unsigned long *map_size; |