diff options
Diffstat (limited to 'drivers/firmware/efi/libstub/efi-stub.c')
| -rw-r--r-- | drivers/firmware/efi/libstub/efi-stub.c | 29 |
1 files changed, 0 insertions, 29 deletions
diff --git a/drivers/firmware/efi/libstub/efi-stub.c b/drivers/firmware/efi/libstub/efi-stub.c index cf474f0dd261..0ebfa2d9628a 100644 --- a/drivers/firmware/efi/libstub/efi-stub.c +++ b/drivers/firmware/efi/libstub/efi-stub.c @@ -35,15 +35,6 @@ * as well to minimize the code churn. */ #define EFI_RT_VIRTUAL_BASE SZ_512M -#define EFI_RT_VIRTUAL_SIZE SZ_512M - -#ifdef CONFIG_ARM64 -# define EFI_RT_VIRTUAL_LIMIT DEFAULT_MAP_WINDOW_64 -#elif defined(CONFIG_RISCV) || defined(CONFIG_LOONGARCH) -# define EFI_RT_VIRTUAL_LIMIT TASK_SIZE_MIN -#else /* Only if TASK_SIZE is a constant */ -# define EFI_RT_VIRTUAL_LIMIT TASK_SIZE -#endif /* * Some architectures map the EFI regions into the kernel's linear map using a @@ -230,26 +221,6 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, efi_novamap |= !(get_supported_rt_services() & EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP); - /* hibernation expects the runtime regions to stay in the same place */ - if (!IS_ENABLED(CONFIG_HIBERNATION) && !efi_nokaslr && !flat_va_mapping) { - /* - * Randomize the base of the UEFI runtime services region. - * Preserve the 2 MB alignment of the region by taking a - * shift of 21 bit positions into account when scaling - * the headroom value using a 32-bit random value. - */ - static const u64 headroom = EFI_RT_VIRTUAL_LIMIT - - EFI_RT_VIRTUAL_BASE - - EFI_RT_VIRTUAL_SIZE; - u32 rnd; - - status = efi_get_random_bytes(sizeof(rnd), (u8 *)&rnd); - if (status == EFI_SUCCESS) { - virtmap_base = EFI_RT_VIRTUAL_BASE + - (((headroom >> 21) * rnd) >> (32 - 21)); - } - } - install_memreserve_table(); status = efi_boot_kernel(handle, image, image_addr, cmdline_ptr); |