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Diffstat (limited to '')
| -rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Arm/SpeculationBarrier.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Arm/SpeculationBarrier.S b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Arm/SpeculationBarrier.S new file mode 100644 index 00000000..a4742308 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Arm/SpeculationBarrier.S @@ -0,0 +1,33 @@ +##------------------------------------------------------------------------------ +# +# SpeculationBarrier() for AArch64 +# +# Copyright (c) 2019, Linaro Ltd. All rights reserved. +# +# SPDX-License-Identifier: BSD-2-Clause-Patent +# +##------------------------------------------------------------------------------ + +.text +.p2align 2 + +GCC_ASM_EXPORT(SpeculationBarrier) + + +#/** +# Uses as a barrier to stop speculative execution. +# +# Ensures that no later instruction will execute speculatively, until all prior +# instructions have completed. +# +#**/ +#VOID +#EFIAPI +#SpeculationBarrier ( +# VOID +# ); +# +ASM_PFX(SpeculationBarrier): + dsb + isb + bx lr |