On Tue, Apr 03, 2018 at 02:25:30AM +0000, Yao, Jiewen wrote: > I have a discussion with Star/Jian. > > The expectation for the CPU driver is to handle PageAttribute. > The expectation for the platform driver is to use GetAttribute(), AND/OR > attribute, then call SetAttribute().
Agree, "Get and then Set" seems to be the clearest definition for gDS->SetMemoryAttributes(). Thanks, Heyi > Because the DRAM always has a cache attribute (no matter UC or WB), 0 should > not happen. (0 might happen for a GCD reserved memory, but there is no need > to set page attribute) > > If all drivers use above way, there won't be any issue. There is no need to > introduce a new protocol so far. > > We did encounter some error, because the platform/silicon/CPU code is not > updated yet. (For example, the MinnowMax which is using binary) > The fix to filter 0 seems a workable way to resolve the compatibility issue. > > Later, I suggest we update MinnowMax binary - Add paging handling for CPU > driver, and use GetAttribute()/SetAttribute() for platform/silicon code. > > > Thank you > Yao Jiewen > > > -----Original Message----- > > From: edk2-devel [mailto:[email protected]] On Behalf Of Wang, > > Jian J > > Sent: Tuesday, April 3, 2018 9:24 AM > > To: Zeng, Star <[email protected]>; Kinney, Michael D > > <[email protected]>; Heyi Guo <[email protected]>; > > [email protected] > > Cc: Ni, Ruiyu <[email protected]>; Yi Li <[email protected]>; Gao, > > Liming <[email protected]>; Dong, Eric <[email protected]>; Renhao > > Liang <[email protected]> > > Subject: Re: [edk2] [PATCH 1/1] MdeModulePkg/Gcd: Fix bug of attribute > > conversion > > > > The NX Memory Protection and Heap Guard features need to clear paging > > attributes. > > Allowing 0 attribute is the current only choice without changing arch > > protocol. > > Maybe > > It's time to introduce a new protocol. > > > > Regards, > > Jian > > > > > > > -----Original Message----- > > > From: Zeng, Star > > > Sent: Tuesday, April 03, 2018 9:16 AM > > > To: Kinney, Michael D <[email protected]>; Heyi Guo > > > <[email protected]>; [email protected] > > > Cc: Yi Li <[email protected]>; Renhao Liang > > > <[email protected]>; Dong, Eric <[email protected]>; Gao, Liming > > > <[email protected]>; Wang, Jian J <[email protected]>; Ni, Ruiyu > > > <[email protected]>; Zeng, Star <[email protected]> > > > Subject: RE: [PATCH 1/1] MdeModulePkg/Gcd: Fix bug of attribute conversion > > > > > > Current gCpu->SetMemoryAttributes does not support getting memory > > > attributes, and has no clear description about clearing memory attributes. > > > > > > I noticed we introduced > > > > > SmmMemoryAttribute(MdeModulePkg\Include\Protocol\SmmMemoryAttribut > > e. > > > h) protocol for heap guard feature in SMM environment. > > > Seemingly, we also need introduce MemoryAttribute protocol for DXE? > > > > > > > > > Thanks, > > > Star > > > -----Original Message----- > > > From: Zeng, Star > > > Sent: Tuesday, April 3, 2018 8:59 AM > > > To: Kinney, Michael D <[email protected]>; Heyi Guo > > > <[email protected]>; [email protected] > > > Cc: Yi Li <[email protected]>; Renhao Liang > > > <[email protected]>; Dong, Eric <[email protected]>; Gao, Liming > > > <[email protected]>; Wang, Jian J <[email protected]>; Ni, Ruiyu > > > <[email protected]>; Zeng, Star <[email protected]> > > > Subject: RE: [PATCH 1/1] MdeModulePkg/Gcd: Fix bug of attribute conversion > > > > > > Mike, > > > > > > Agree the problem. > > > We need support only RUNTIME attribute. > > > We need support only cache attributes. > > > We need support only page attributes. > > > We need support RUNTIME + cache + page attributes. > > > Do we need support the 0 Attributes case to clear page attributes? > > > There was discussion about the 0 Attributes case at > > > https://lists.01.org/pipermail/edk2-devel/2018-March/023315.html. > > > It came to the question that should the 0 Attributes case be handled by > > > SetMemoryAttributes() to clear the page attributes? > > > > > > > > > Thanks, > > > Star > > > -----Original Message----- > > > From: Kinney, Michael D > > > Sent: Tuesday, April 3, 2018 5:43 AM > > > To: Zeng, Star <[email protected]>; Heyi Guo <[email protected]>; > > > edk2- > > > [email protected]; Kinney, Michael D <[email protected]> > > > Cc: Yi Li <[email protected]>; Renhao Liang > > > <[email protected]>; Dong, Eric <[email protected]>; Gao, Liming > > > <[email protected]>; Wang, Jian J <[email protected]>; Ni, Ruiyu > > > <[email protected]> > > > Subject: RE: [PATCH 1/1] MdeModulePkg/Gcd: Fix bug of attribute conversion > > > > > > Star, > > > > > > This commit breaks Vlv2TbltDevicePkg. > > > > > > On this platform, there are 2 calls to > > > gDS->SetMemorySpaceAttributes() for an MMIO > > > range to set only the EFI_MEMORY_RUNTIME bit. > > > > > > With this commit, ConverToCpuArchAttributes()returns 0, and 0 is passed to > > > gCpu->SetMemoryAttributes()that returns EFI_INVALID_PARAMETER on > > > Vlv2TbltDevicePkg. > > > > > > Before this commit, ConverToCpuArchAttributes() returns > > > INVALID_CPU_ARCH_ATTRIBUTES which causes the call to gCpu- > > > >SetMemoryAttributes()to be skipped so no error is generated. > > > > > > I think the right fix is to skip the call to > > > gCpu->SetMemoryAttributes() if CpuArchAttributes > > > is 0 so a call that only sets the RUNTIME attribute can be supported > > > along with > > > call the set both the RUNTIME bit and other cache related bits. > > > > > > I will send a patch soon with the proposed fix. > > > > > > Mike > > > > > > > -----Original Message----- > > > > From: Zeng, Star > > > > Sent: Sunday, April 1, 2018 10:59 PM > > > > To: Heyi Guo <[email protected]>; edk2- [email protected] > > > > Cc: Yi Li <[email protected]>; Renhao Liang > > > > <[email protected]>; Dong, Eric <[email protected]>; Kinney, > > > > Michael D <[email protected]>; Gao, Liming > > > > <[email protected]>; Wang, Jian J <[email protected]>; Ni, > > > > Ruiyu <[email protected]>; Zeng, Star <[email protected]> > > > > Subject: RE: [PATCH 1/1] MdeModulePkg/Gcd: Fix bug of attribute > > > > conversion > > > > > > > > Pushed at 5b91bf82c67b586b9588cbe4bbffa1588f6b5926. > > > > > > > > Thanks, > > > > Star > > > > -----Original Message----- > > > > From: Heyi Guo [mailto:[email protected]] > > > > Sent: Thursday, March 29, 2018 4:20 PM > > > > To: [email protected] > > > > Cc: Heyi Guo <[email protected]>; Yi Li <[email protected]>; > > > > Renhao Liang <[email protected]>; Zeng, Star > > > > <[email protected]>; Dong, Eric <[email protected]>; Kinney, > > > > Michael D <[email protected]>; Gao, Liming > > > > <[email protected]>; Wang, Jian J <[email protected]>; Ni, > > > > Ruiyu <[email protected]> > > > > Subject: [PATCH 1/1] MdeModulePkg/Gcd: Fix bug of attribute conversion > > > > > > > > For gDS->SetMemorySpaceAttributes(), when user passes a combined > > > > memory attribute including CPU arch attribute and other attributes, > > > > like EFI_MEMORY_RUNTIME, > > > > ConverToCpuArchAttributes() will return INVALID_CPU_ARCH_ATTRIBUTES > > > > and skip setting page/cache attribute for the specified memory space. > > > > > > > > We don't see any reason to forbid combining CPU arch attributes and > > > > non-CPU-arch attributes when calling gDS- > > > > >SetMemorySpaceAttributes(), so we remove the check code > > > > in ConverToCpuArchAttributes(); the remaining code is enough to grab > > > > the interested bits for > > > > Cpu->SetMemoryAttributes(). > > > > > > > > Contributed-under: TianoCore Contribution Agreement 1.1 > > > > Signed-off-by: Heyi Guo <[email protected]> > > > > Signed-off-by: Yi Li <[email protected]> > > > > Signed-off-by: Renhao Liang <[email protected]> > > > > Cc: Star Zeng <[email protected]> > > > > Cc: Eric Dong <[email protected]> > > > > Cc: Michael D Kinney <[email protected]> > > > > Cc: Liming Gao <[email protected]> > > > > Cc: Jian J Wang <[email protected]> > > > > Cc: Ruiyu Ni <[email protected]> > > > > --- > > > > MdeModulePkg/Core/Dxe/Gcd/Gcd.c | 5 ----- > > > > 1 file changed, 5 deletions(-) > > > > > > > > diff --git a/MdeModulePkg/Core/Dxe/Gcd/Gcd.c > > > > b/MdeModulePkg/Core/Dxe/Gcd/Gcd.c index > > > > 77f4adb4bc01..907245a3f512 100644 > > > > --- a/MdeModulePkg/Core/Dxe/Gcd/Gcd.c > > > > +++ b/MdeModulePkg/Core/Dxe/Gcd/Gcd.c > > > > @@ -673,11 +673,6 @@ ConverToCpuArchAttributes ( { > > > > UINT64 CpuArchAttributes; > > > > > > > > - if ((Attributes & ~(EXCLUSIVE_MEMORY_ATTRIBUTES | > > > > - NONEXCLUSIVE_MEMORY_ATTRIBUTES)) > > > > != 0) { > > > > - return INVALID_CPU_ARCH_ATTRIBUTES; > > > > - } > > > > - > > > > CpuArchAttributes = Attributes & > > > > NONEXCLUSIVE_MEMORY_ATTRIBUTES; > > > > > > > > if ( (Attributes & EFI_MEMORY_UC) == EFI_MEMORY_UC) { > > > > -- > > > > 2.7.4 > > > > _______________________________________________ > > 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
