diff options
Diffstat (limited to 'drivers/firmware/efi/libstub/arm64-stub.c')
| -rw-r--r-- | drivers/firmware/efi/libstub/arm64-stub.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c index cd3bea25c762..df05c53baa23 100644 --- a/drivers/firmware/efi/libstub/arm64-stub.c +++ b/drivers/firmware/efi/libstub/arm64-stub.c @@ -19,6 +19,14 @@ efi_status_t check_platform_features(void) { u64 tg; + /* + * If we have 48 bits of VA space for TTBR0 mappings, we can map the + * UEFI runtime regions 1:1 and so calling SetVirtualAddressMap() is + * unnecessary. + */ + if (VA_BITS_MIN >= 48) + efi_novamap = true; + /* UEFI mandates support for 4 KB granularity, no need to check */ if (IS_ENABLED(CONFIG_ARM64_4K_PAGES)) return EFI_SUCCESS; |