From: Hao Wu <hao.a.wu@intel.com>
To: edk2-devel@lists.01.org
Cc: Hao Wu <hao.a.wu@intel.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Jiewen Yao <jiewen.yao@intel.com>,
Liming Gao <liming.gao@intel.com>,
Eric Dong <eric.dong@intel.com>, Ruiyu Ni <ruiyu.ni@intel.com>,
Laszlo Ersek <lersek@redhat.com>
Subject: [PATCH v1 5/5] UefiCpuPkg/PiSmmCpuDxeSmm: Update to consume SpeculationBarrier
Date: Fri, 21 Dec 2018 11:11:06 +0800 [thread overview]
Message-ID: <20181221031106.12960-6-hao.a.wu@intel.com> (raw)
In-Reply-To: <20181221031106.12960-1-hao.a.wu@intel.com>
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: Eric Dong <eric.dong@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>
---
UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
index 19979d5418..8c9fa14b5b 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
@@ -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
--
2.12.0.windows.1
next prev parent reply other threads:[~2018-12-21 3:11 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-21 3:11 [PATCH v1 0/5] Ues arch-generic API SpeculationBarrier() to replace AsmLfence() Hao Wu
2018-12-21 3:11 ` [PATCH v1 1/5] MdePkg/BaseLib: Introduce new SpeculationBarrier API Hao Wu
2018-12-24 3:15 ` Gao, Liming
2018-12-21 3:11 ` [PATCH v1 2/5] MdeModulePkg/FaultTolerantWrite: Update to consume SpeculationBarrier Hao Wu
2018-12-24 2:56 ` Wang, Jian J
2018-12-21 3:11 ` [PATCH v1 3/5] MdeModulePkg/SmmLockBox: " Hao Wu
2018-12-24 2:56 ` Wang, Jian J
2018-12-21 3:11 ` [PATCH v1 4/5] MdeModulePkg/Variable: " Hao Wu
2018-12-24 2:59 ` Wang, Jian J
2018-12-21 3:11 ` Hao Wu [this message]
2018-12-24 0:54 ` [PATCH v1 5/5] UefiCpuPkg/PiSmmCpuDxeSmm: " Dong, Eric
2018-12-21 11:22 ` [PATCH v1 0/5] Ues arch-generic API SpeculationBarrier() to replace AsmLfence() Ard Biesheuvel
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