Reviewed-by: Michael Kubacki <michael.a.kuba...@intel.com> > -----Original Message----- > From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of > Michael D Kinney > Sent: Tuesday, April 30, 2019 12:31 PM > To: devel@edk2.groups.io > Cc: Steele, Kelly <kelly.ste...@intel.com>; Gao, Liming > <liming....@intel.com> > Subject: [edk2-devel] [Patch V3 3/8] QuarkPlatformPkg: Set > PcdSpeculationBarrierType to CPUID > > Set PcdSpeculationBarrierType to use CPUID instead of the default LFENCE in > the BaseLib function SpeculationBarrier(). > LFENCE requires SSE2, and Quark platforms do not support SSE2. > > Cc: Kelly Steele <kelly.ste...@intel.com> > Cc: Liming Gao <liming....@intel.com> > Signed-off-by: Michael D Kinney <michael.d.kin...@intel.com> > --- > QuarkPlatformPkg/Quark.dsc | 7 ++++++- > QuarkPlatformPkg/QuarkMin.dsc | 5 +++++ > 2 files changed, 11 insertions(+), 1 deletion(-) > > diff --git a/QuarkPlatformPkg/Quark.dsc b/QuarkPlatformPkg/Quark.dsc > index 422fd9cf8d..96ddc1565a 100644 > --- a/QuarkPlatformPkg/Quark.dsc > +++ b/QuarkPlatformPkg/Quark.dsc > @@ -2,7 +2,7 @@ > # Clanton Peak CRB platform with 32-bit DXE for 4MB/8MB flash devices. > # > # This package provides Clanton Peak CRB platform specific modules. > -# Copyright (c) 2013 - 2018 Intel Corporation. > +# Copyright (c) 2013 - 2019 Intel Corporation. > # > # SPDX-License-Identifier: BSD-2-Clause-Patent # @@ -448,6 +448,11 @@ > [PcdsFixedAtBuild] > > gEfiMdeModulePkgTokenSpaceGuid.PcdRecoveryFileName|L"QUARKREC.Ca > p" > !endif > > + # > + # Quark does not support LFENCE. Use CPUID as speculation barrier # > + gEfiMdePkgTokenSpaceGuid.PcdSpeculationBarrierType|0x02 > + > [PcdsPatchableInModule] > gEfiMdePkgTokenSpaceGuid.PcdDebugPrintErrorLevel|0x803000C7 > gEfiMdeModulePkgTokenSpaceGuid.PcdVpdBaseAddress|0x0 > diff --git a/QuarkPlatformPkg/QuarkMin.dsc > b/QuarkPlatformPkg/QuarkMin.dsc index 00e2febb54..8ca75bc474 100644 > --- a/QuarkPlatformPkg/QuarkMin.dsc > +++ b/QuarkPlatformPkg/QuarkMin.dsc > @@ -406,6 +406,11 @@ [PcdsFixedAtBuild] > > gEfiMdeModulePkgTokenSpaceGuid.PcdConInConnectOnDemand|FALSE > > + # > + # Quark does not support LFENCE. Use CPUID as speculation barrier # > + gEfiMdePkgTokenSpaceGuid.PcdSpeculationBarrierType|0x02 > + > [PcdsPatchableInModule] > gEfiMdePkgTokenSpaceGuid.PcdDebugPrintErrorLevel|0x803000C7 > gEfiMdeModulePkgTokenSpaceGuid.PcdVpdBaseAddress|0x0 > -- > 2.21.0.windows.1 > > >
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