diff options
Diffstat (limited to 'drivers/firmware/efi/libstub/arm64-stub.c')
| -rw-r--r-- | drivers/firmware/efi/libstub/arm64-stub.c | 28 |
1 files changed, 0 insertions, 28 deletions
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c index f35c0e54e294..c14028b625b4 100644 --- a/drivers/firmware/efi/libstub/arm64-stub.c +++ b/drivers/firmware/efi/libstub/arm64-stub.c @@ -11,37 +11,9 @@ #include <asm/efi.h> #include <asm/memory.h> #include <asm/sections.h> -#include <asm/sysreg.h> #include "efistub.h" -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; - - tg = (read_cpuid(ID_AA64MMFR0_EL1) >> ID_AA64MMFR0_EL1_TGRAN_SHIFT) & 0xf; - if (tg < ID_AA64MMFR0_EL1_TGRAN_SUPPORTED_MIN || tg > ID_AA64MMFR0_EL1_TGRAN_SUPPORTED_MAX) { - if (IS_ENABLED(CONFIG_ARM64_64K_PAGES)) - efi_err("This 64 KB granular kernel is not supported by your CPU\n"); - else - efi_err("This 16 KB granular kernel is not supported by your CPU\n"); - return EFI_UNSUPPORTED; - } - return EFI_SUCCESS; -} - /* * Distro versions of GRUB may ignore the BSS allocation entirely (i.e., fail * to provide space, and fail to zero it). Check for this condition by double |