Hi Jian, Not aware this comments before I send out V2 patch, will include this info in commit message when I check in the code.
Thanks, Eric > -----Original Message----- > From: Wang, Jian J > Sent: Tuesday, October 9, 2018 10:03 AM > To: edk2-devel <[email protected]>; Dong, Eric > <[email protected]>; [email protected] > Cc: Ni, Ruiyu <[email protected]>; Laszlo Ersek <[email protected]> > Subject: RE: [Patch] UefiCpuPkg/S3Resume2Pei: disable paging before > creating new page table. > > Forgot one thing: this issue is caused by introducing of PEI stack guard so > please add the revision id of related check in for references in message. > > Regards, > Jian > > > > -----Original Message----- > > From: edk2-devel [mailto:[email protected]] > > Sent: Tuesday, October 09, 2018 9:59 AM > > To: Dong, Eric <[email protected]>; [email protected] > > Cc: Ni, Ruiyu <[email protected]>; Laszlo Ersek <[email protected]> > > Subject: Re: [edk2] [Patch] UefiCpuPkg/S3Resume2Pei: disable paging > > before creating new page table. > > > > Thanks for fixing this issue. > > > > Reviewed-by: Jian J Wang <[email protected]> > > > > > -----Original Message----- > > > From: Dong, Eric > > > Sent: Tuesday, October 09, 2018 9:51 AM > > > To: [email protected] > > > Cc: Ni, Ruiyu <[email protected]>; Laszlo Ersek > > > <[email protected]>; Wang, Jian J <[email protected]> > > > Subject: [Patch] UefiCpuPkg/S3Resume2Pei: disable paging before > > > creating > > new > > > page table. > > > > > > PEI Stack Guard needs to enable paging. This might cause #GP in the > > > transition from 32-bit PEI to 64-bit SMM due to the code trying to > > > write CR3 register with PML4 page table while the processor is > > > enabled with PAE paging. > > > > > > Simply disabling paging before updating CR3 can solve this conflict. > > > > > > Change-Id: I99bfdba5daa48a95a4c4ef97eeca1af086558957 > > > Cc: Ruiyu Ni <[email protected]> > > > Cc: Laszlo Ersek <[email protected]> > > > Cc: Jian J Wang <[email protected]> > > > Contributed-under: TianoCore Contribution Agreement 1.1 > > > Signed-off-by:Eric Dong <[email protected]> > > > Signed-off-by: Eric Dong <[email protected]> > > > --- > > > UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c | 7 +++++++ > > > UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf | 1 + > > > 2 files changed, 8 insertions(+) > > > > > > diff --git a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c > > > b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c > > > index f164c1713b..b3bf56e13d 100644 > > > --- a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c > > > +++ b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c > > > @@ -1105,6 +1105,13 @@ S3RestoreConfig2 ( > > > // > > > SetInterruptState (InterruptStatus); > > > > > > + if (PcdGetBool (PcdCpuStackGuard)) { > > > + // > > > + // Paging already been enabled, to avoid conflict configuration, > > > + // disable paging first anyway. > > > + // > > > + AsmWriteCr0 (AsmReadCr0 () & (~BIT31)); > > > + } > > > AsmWriteCr3 ((UINTN)SmmS3ResumeState->SmmS3Cr3); > > > > > > // > > > diff --git a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf > > > b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf > > > index 6ce1bf944c..0f131d19df 100644 > > > --- a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf > > > +++ b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf > > > @@ -90,6 +90,7 @@ > > > [Pcd] > > > gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable ## > > > SOMETIMES_CONSUMES > > > > > > gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrM > ask > > > ## CONSUMES > > > + gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard > > > ## > > > CONSUMES > > > > > > [Depex] > > > TRUE > > > -- > > > 2.15.0.windows.1 > > > > _______________________________________________ > > edk2-devel mailing list > > [email protected] > > https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
