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UefiCpuPkg/PiSmmCpuDxeSmm: Update to consume SpeculationBarrier

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REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1417

Since BaseLib API AsmLfence() is a x86 arch specific API and should be
avoided using in generic codes, this commit replaces the usage of
AsmLfence() with arch-generic API SpeculationBarrier().

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
This commit is contained in:
Hao Wu 2018-12-21 10:34:20 +08:00
parent 49395ea0bc
commit b70ec0de46
1 changed files with 3 additions and 3 deletions
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UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
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@ -238,10 +238,10 @@ SmmReadSaveState (
return EFI_INVALID_PARAMETER;
}
//
// The AsmLfence() call here is to ensure the above check for the CpuIndex
// has been completed before the execution of subsequent codes.
// The SpeculationBarrier() call here is to ensure the above check for the
// CpuIndex has been completed before the execution of subsequent codes.
//
AsmLfence ();
SpeculationBarrier ();
//
// Check for special EFI_SMM_SAVE_STATE_REGISTER_PROCESSOR_ID