Eric: >-----Original Message----- >From: Dong, Eric >Sent: Friday, August 16, 2019 10:20 AM >To: Zeng, Star <star.z...@intel.com>; devel@edk2.groups.io >Cc: Ni, Ray <ray...@intel.com>; Laszlo Ersek <ler...@redhat.com>; Yao, >Jiewen <jiewen....@intel.com>; Gao, Liming <liming....@intel.com>; >Kinney, Michael D <michael.d.kin...@intel.com> >Subject: RE: [Patch v3 1/6] UefiCpuPkg/RegisterCpuFeaturesLib: Add "Test >Then Write" Macros. > > > >> -----Original Message----- >> From: Zeng, Star >> Sent: Friday, August 16, 2019 10:08 AM >> To: Dong, Eric <eric.d...@intel.com>; devel@edk2.groups.io >> Cc: Ni, Ray <ray...@intel.com>; Laszlo Ersek <ler...@redhat.com>; Yao, >> Jiewen <jiewen....@intel.com>; Gao, Liming <liming....@intel.com>; >Kinney, >> Michael D <michael.d.kin...@intel.com>; Zeng, Star <star.z...@intel.com> >> Subject: RE: [Patch v3 1/6] UefiCpuPkg/RegisterCpuFeaturesLib: Add "Test >> Then Write" Macros. >> >> >> >> > -----Original Message----- >> > From: Dong, Eric >> > Sent: Friday, August 16, 2019 9:27 AM >> > To: Zeng, Star <star.z...@intel.com>; devel@edk2.groups.io >> > Cc: Ni, Ray <ray...@intel.com>; Laszlo Ersek <ler...@redhat.com> >> > Subject: RE: [Patch v3 1/6] UefiCpuPkg/RegisterCpuFeaturesLib: Add >> > "Test Then Write" Macros. >> > >> > > -----Original Message----- >> > > From: Zeng, Star >> > > Sent: Friday, August 16, 2019 9:15 AM >> > > To: Dong, Eric <eric.d...@intel.com>; devel@edk2.groups.io >> > > Cc: Ni, Ray <ray...@intel.com>; Laszlo Ersek <ler...@redhat.com>; >> > > Zeng, Star <star.z...@intel.com> >> > > Subject: RE: [Patch v3 1/6] UefiCpuPkg/RegisterCpuFeaturesLib: Add >> > > "Test Then Write" Macros. >> > > >> > > >> > > >> > > > -----Original Message----- >> > > > From: Dong, Eric >> > > > Sent: Thursday, August 15, 2019 10:51 AM >> > > > To: devel@edk2.groups.io >> > > > Cc: Ni, Ray <ray...@intel.com>; Laszlo Ersek <ler...@redhat.com>; >> > > > Zeng, Star <star.z...@intel.com> >> > > > Subject: [Patch v3 1/6] UefiCpuPkg/RegisterCpuFeaturesLib: Add >> > > > "Test Then Write" Macros. >> > > > >> > > > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2040 >> > > > >> > > > Add below new micros which test the current value before write the >> > > > new value. Only write new value when current value not same as new >> > value. >> > > > CPU_REGISTER_TABLE_TEST_THEN_WRITE32 >> > > > CPU_REGISTER_TABLE_TEST_THEN_WRITE64 >> > > > CPU_REGISTER_TABLE_TEST_THEN_WRITE_FIELD >> > > > >> > > > Also add below API: >> > > > CpuRegisterTableTestThenWrite >> > > > >> > > > Signed-off-by: Eric Dong <eric.d...@intel.com> >> > > > Cc: Ray Ni <ray...@intel.com> >> > > > Cc: Laszlo Ersek <ler...@redhat.com> >> > > > Cc: Star Zeng <star.z...@intel.com> >> > > > --- >> > > > UefiCpuPkg/Include/AcpiCpuData.h | 1 + >> > > > .../Include/Library/RegisterCpuFeaturesLib.h | 91 >> > +++++++++++++++++++ >> > > > .../RegisterCpuFeaturesLib.c | 45 ++++++++- >> > > > 3 files changed, 134 insertions(+), 3 deletions(-) >> > > > >> > > > diff --git a/UefiCpuPkg/Include/AcpiCpuData.h >> > > > b/UefiCpuPkg/Include/AcpiCpuData.h >> > > > index b963a2f592..472a1a8070 100644 >> > > > --- a/UefiCpuPkg/Include/AcpiCpuData.h >> > > > +++ b/UefiCpuPkg/Include/AcpiCpuData.h >> > > > @@ -81,6 +81,7 @@ typedef struct { >> > > > UINT16 Reserved; // offset 10 - 11 >> > > > UINT32 HighIndex; // offset 12-15, only valid >> > > > for >> > MemoryMapped >> > > > UINT64 Value; // offset 16-23 >> > > > + UINT8 TestThenWrite; // 0ffset 24 >> > > >> > > Could we use one byte of the Reserved field, but not add new field? >> > > And use BOOLEAN type for it? >> > >> > I'm not sure whether use the Reserved field is an correct approach, do >> > you have samples which use the reserved fields? >> > But I think add new field is a more safe one. >> >> What "more safe" means here? Adding new field extends the structure, >from >> the structure layout view of point, it is an incompatible change, the >> structure >> size is not just from 24 to 25 bytes, but to be nature aligned, the structure >size >> will be (24 + 8) 32. Since there is Reserved field can be reused, that size >impact >> can be removed. > >Yes, agree the size impact. I'm just not clear whether the Reserved field can >be used. Whether it has compatible impact. > >> >> FspGlobalData.h: >> SHA-1: a2e61f341d26a78751b2f19b5004c6bbfc8b4fa9 >> * IntelFsp2Pkg: Support FSP Dispatch mode >> >> MemoryProfile.h >> SHA-1: 072a3ca1d36a42aec97f871c808776ee7038ca06 (related to >> 94092aa60341a3e4b1e1ea7c362781b8404ac538) >> * MdeModulePkg MemoryProfile.h:two bytes of Reserved[4] as >> ActionStringOffset >> > >If so many examples already did it. I think we can also do it. > >> >> If needed, more comments from Ray, Laszlo, Jiewen, Liming and Mike will >be >> better. > >Yes, I think we need get more comments from them.
I think to reuse the reserved field is a good solution. Thanks Liming > >Thanks, >Eric >> >> >> Thanks, >> Star >> >> > >> > Thanks, >> > Eric >> > > >> > > Thanks, >> > > Star >> > > >> > > > } CPU_REGISTER_TABLE_ENTRY; >> > > > >> > > > // >> > > > diff --git a/UefiCpuPkg/Include/Library/RegisterCpuFeaturesLib.h >> > > > b/UefiCpuPkg/Include/Library/RegisterCpuFeaturesLib.h >> > > > index e420e7f075..5bd464b32e 100644 >> > > > --- a/UefiCpuPkg/Include/Library/RegisterCpuFeaturesLib.h >> > > > +++ b/UefiCpuPkg/Include/Library/RegisterCpuFeaturesLib.h >> > > > @@ -348,6 +348,32 @@ CpuRegisterTableWrite ( >> > > > IN UINT64 Value >> > > > ); >> > > > >> > > > +/** >> > > > + Adds an entry in specified register table. >> > > > + >> > > > + This function adds an entry in specified register table, with >> > > > + given register type, register index, bit section and value. >> > > > + >> > > > + Driver will test the current value before setting new value. >> > > > + >> > > > + @param[in] ProcessorNumber The index of the CPU to add a >> > > > + register >> > > > table entry >> > > > + @param[in] RegisterType Type of the register to program >> > > > + @param[in] Index Index of the register to program >> > > > + @param[in] ValueMask Mask of bits in register to write >> > > > + @param[in] Value Value to write >> > > > + >> > > > + @note This service could be called by BSP only. >> > > > +**/ >> > > > +VOID >> > > > +EFIAPI >> > > > +CpuRegisterTableTestThenWrite ( >> > > > + IN UINTN ProcessorNumber, >> > > > + IN REGISTER_TYPE RegisterType, >> > > > + IN UINT64 Index, >> > > > + IN UINT64 ValueMask, >> > > > + IN UINT64 Value >> > > > + ); >> > > > + >> > > > /** >> > > > Adds an entry in specified Pre-SMM register table. >> > > > >> > > > @@ -390,6 +416,26 @@ PreSmmCpuRegisterTableWrite ( >> > > > CpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, >> > > > MAX_UINT32, Value); \ >> > > > } while(FALSE); >> > > > >> > > > +/** >> > > > + Adds a 32-bit register write entry in specified register table. >> > > > + >> > > > + This macro adds an entry in specified register table, with >> > > > + given register type, register index, and value. >> > > > + >> > > > + Driver will test the current value before setting new value. >> > > > + >> > > > + @param[in] ProcessorNumber The index of the CPU to add a >> > > > + register >> > > > table entry. >> > > > + @param[in] RegisterType Type of the register to program >> > > > + @param[in] Index Index of the register to program >> > > > + @param[in] Value Value to write >> > > > + >> > > > + @note This service could be called by BSP only. >> > > > +**/ >> > > > +#define >> > CPU_REGISTER_TABLE_TEST_THEN_WRITE32(ProcessorNumber, >> > > > RegisterType, Index, Value) \ >> > > > + do { >> > > > \ >> > > > + CpuRegisterTableTestThenWrite (ProcessorNumber, RegisterType, >> > > > +Index, MAX_UINT32, Value); \ >> > > > + } while(FALSE); >> > > > + >> > > > /** >> > > > Adds a 64-bit register write entry in specified register table. >> > > > >> > > > @@ -408,6 +454,26 @@ PreSmmCpuRegisterTableWrite ( >> > > > CpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, >> > > > MAX_UINT64, Value); \ >> > > > } while(FALSE); >> > > > >> > > > +/** >> > > > + Adds a 64-bit register write entry in specified register table. >> > > > + >> > > > + This macro adds an entry in specified register table, with >> > > > + given register type, register index, and value. >> > > > + >> > > > + Driver will test the current value before setting new value. >> > > > + >> > > > + @param[in] ProcessorNumber The index of the CPU to add a >> > > > + register >> > > > table entry. >> > > > + @param[in] RegisterType Type of the register to program >> > > > + @param[in] Index Index of the register to program >> > > > + @param[in] Value Value to write >> > > > + >> > > > + @note This service could be called by BSP only. >> > > > +**/ >> > > > +#define >> > CPU_REGISTER_TABLE_TEST_THEN_WRITE64(ProcessorNumber, >> > > > RegisterType, Index, Value) \ >> > > > + do { >> > > > \ >> > > > + CpuRegisterTableTestThenWrite (ProcessorNumber, RegisterType, >> > > > +Index, MAX_UINT64, Value); \ >> > > > + } while(FALSE); >> > > > + >> > > > /** >> > > > Adds a bit field write entry in specified register table. >> > > > >> > > > @@ -431,6 +497,31 @@ PreSmmCpuRegisterTableWrite ( >> > > > CpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, >> > > > ~ValueMask, Value); \ >> > > > } while(FALSE); >> > > > >> > > > +/** >> > > > + Adds a bit field write entry in specified register table. >> > > > + >> > > > + This macro adds an entry in specified register table, with >> > > > + given register type, register index, bit field section, and value. >> > > > + >> > > > + Driver will test the current value before setting new value. >> > > > + >> > > > + @param[in] ProcessorNumber The index of the CPU to add a >> > > > + register >> > > > table entry. >> > > > + @param[in] RegisterType Type of the register to program. >> > > > + @param[in] Index Index of the register to program. >> > > > + @param[in] Type The data type name of a register >> > > > structure. >> > > > + @param[in] Field The bit fiel name in register >> > > > structure to >write. >> > > > + @param[in] Value Value to write to the bit field. >> > > > + >> > > > + @note This service could be called by BSP only. >> > > > +**/ >> > > > +#define >> > > > CPU_REGISTER_TABLE_TEST_THEN_WRITE_FIELD(ProcessorNumber, >> > > > RegisterType, Index, Type, Field, Value) \ >> > > > + do { >> > > > \ >> > > > + UINT64 ValueMask; >> > > > \ >> > > > + ValueMask = MAX_UINT64; >> \ >> > > > + ((Type *)(&ValueMask))->Field = 0; >> > \ >> > > > + CpuRegisterTableTestThenWrite (ProcessorNumber, RegisterType, >> > > > + Index, >> > > > ~ValueMask, Value); \ >> > > > + } while(FALSE); >> > > > + >> > > > /** >> > > > Adds a 32-bit register write entry in specified register table. >> > > > >> > > > diff --git >> > > > >a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib >> > > > .c >> > > > >b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib >> > > > .c index 67885bf69b..e9769882b9 100644 >> > > > --- >> > > > >a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib >> > > > .c >> > > > +++ >> > > > >b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib >> > > > .c @@ -1025,6 +1025,8 @@ EnlargeRegisterTable ( >> > > > @param[in] ValidBitStart Start of the bit section >> > > > @param[in] ValidBitLength Length of the bit section >> > > > @param[in] Value Value to write >> > > > + @param[in] TestThenWrite Whether need to test current Value >> > before >> > > > writing. >> > > > + >> > > > **/ >> > > > VOID >> > > > CpuRegisterTableWriteWorker ( >> > > > @@ -1034,7 +1036,8 @@ CpuRegisterTableWriteWorker ( >> > > > IN UINT64 Index, >> > > > IN UINT8 ValidBitStart, >> > > > IN UINT8 ValidBitLength, >> > > > - IN UINT64 Value >> > > > + IN UINT64 Value, >> > > > + IN UINT8 TestThenWrite >> > > > ) >> > > > { >> > > > CPU_FEATURES_DATA *CpuFeaturesData; >> > > > @@ -1070,6 +1073,7 @@ CpuRegisterTableWriteWorker ( >> > > > RegisterTableEntry[RegisterTable->TableLength].ValidBitStart = >> > > > ValidBitStart; >> > > > RegisterTableEntry[RegisterTable->TableLength].ValidBitLength = >> > > > ValidBitLength; >> > > > RegisterTableEntry[RegisterTable->TableLength].Value = >> > > > Value; >> > > > + RegisterTableEntry[RegisterTable->TableLength].TestThenWrite = >> > > > + TestThenWrite; >> > > > >> > > > RegisterTable->TableLength++; >> > > > } >> > > > @@ -1105,7 +1109,42 @@ CpuRegisterTableWrite ( >> > > > Start = (UINT8)LowBitSet64 (ValueMask); >> > > > End = (UINT8)HighBitSet64 (ValueMask); >> > > > Length = End - Start + 1; >> > > > - CpuRegisterTableWriteWorker (FALSE, ProcessorNumber, >> > > > RegisterType, Index, Start, Length, Value); >> > > > + CpuRegisterTableWriteWorker (FALSE, ProcessorNumber, >> > > > +RegisterType, Index, Start, Length, Value, FALSE); } >> > > > + >> > > > +/** >> > > > + Adds an entry in specified register table. >> > > > + >> > > > + This function adds an entry in specified register table, with >> > > > + given register type, register index, bit section and value. >> > > > + >> > > > + @param[in] ProcessorNumber The index of the CPU to add a >> > > > + register >> > > > table entry >> > > > + @param[in] RegisterType Type of the register to program >> > > > + @param[in] Index Index of the register to program >> > > > + @param[in] ValueMask Mask of bits in register to write >> > > > + @param[in] Value Value to write >> > > > + @param[in] TestThenWrite Whether need to test current Value >> > before >> > > > writing. >> > > > + >> > > > + @note This service could be called by BSP only. >> > > > +**/ >> > > > +VOID >> > > > +EFIAPI >> > > > +CpuRegisterTableTestThenWrite ( >> > > > + IN UINTN ProcessorNumber, >> > > > + IN REGISTER_TYPE RegisterType, >> > > > + IN UINT64 Index, >> > > > + IN UINT64 ValueMask, >> > > > + IN UINT64 Value >> > > > + ) >> > > > +{ >> > > > + UINT8 Start; >> > > > + UINT8 End; >> > > > + UINT8 Length; >> > > > + >> > > > + Start = (UINT8)LowBitSet64 (ValueMask); >> > > > + End = (UINT8)HighBitSet64 (ValueMask); >> > > > + Length = End - Start + 1; >> > > > + CpuRegisterTableWriteWorker (FALSE, ProcessorNumber, >> > > > + RegisterType, Index, Start, Length, Value, TRUE); >> > > > } >> > > > >> > > > /** >> > > > @@ -1139,7 +1178,7 @@ PreSmmCpuRegisterTableWrite ( >> > > > Start = (UINT8)LowBitSet64 (ValueMask); >> > > > End = (UINT8)HighBitSet64 (ValueMask); >> > > > Length = End - Start + 1; >> > > > - CpuRegisterTableWriteWorker (TRUE, ProcessorNumber, >> > > > RegisterType, Index, Start, Length, Value); >> > > > + CpuRegisterTableWriteWorker (TRUE, ProcessorNumber, >> > > > + RegisterType, Index, Start, Length, Value, FALSE); >> > > > } >> > > > >> > > > /** >> > > > -- >> > > > 2.21.0.windows.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. 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