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MdePkg/BaseLib: implement SpeculationBarrier() for ARM and AArch64

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Replace the dummy C implementation of SpeculationBarrier() with
implementations consisting of the recommended DSB SY + ISB sequence,
as recommended by ARM in the whitepaper "Cache Speculation Side-channels"
version 2.4, dated October 2018.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Ard Biesheuvel
2019-02-06 00:08:22 +00:00
parent 1a35dd723b
commit c0959b4426
6 changed files with 160 additions and 32 deletions
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7
MdePkg/Library/BaseLib/BaseLib.inf
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@@ -552,7 +552,6 @@
[Sources.ARM]
Arm/InternalSwitchStack.c
Arm/Unaligned.c
Arm/SpeculationBarrier.c
Math64.c | RVCT
Math64.c | MSFT
@@ -564,6 +563,7 @@
Arm/CpuPause.asm | RVCT
Arm/CpuBreakpoint.asm | RVCT
Arm/MemoryFence.asm | RVCT
Arm/SpeculationBarrier.S | RVCT
Arm/SwitchStack.asm | MSFT
Arm/SetJumpLongJump.asm | MSFT
@@ -573,6 +573,7 @@
Arm/CpuPause.asm | MSFT
Arm/CpuBreakpoint.asm | MSFT
Arm/MemoryFence.asm | MSFT
Arm/SpeculationBarrier.asm | MSFT
Arm/Math64.S | GCC
Arm/SwitchStack.S | GCC
@@ -582,11 +583,11 @@
Arm/SetJumpLongJump.S | GCC
Arm/CpuBreakpoint.S | GCC
Arm/MemoryFence.S | GCC
Arm/SpeculationBarrier.S | GCC
[Sources.AARCH64]
Arm/InternalSwitchStack.c
Arm/Unaligned.c
Arm/SpeculationBarrier.c
Math64.c
AArch64/MemoryFence.S | GCC
@@ -596,6 +597,7 @@
AArch64/GetInterruptsState.S | GCC
AArch64/SetJumpLongJump.S | GCC
AArch64/CpuBreakpoint.S | GCC
AArch64/SpeculationBarrier.S | GCC
AArch64/MemoryFence.asm | MSFT
AArch64/SwitchStack.asm | MSFT
@@ -604,6 +606,7 @@
AArch64/GetInterruptsState.asm | MSFT
AArch64/SetJumpLongJump.asm | MSFT
AArch64/CpuBreakpoint.asm | MSFT
AArch64/SpeculationBarrier.asm | MSFT
[Packages]
MdePkg/MdePkg.dec