回复: [edk2-devel] [PATCH v2 0/2] UEFI memmap workaround for hiding page-access caps from OSes hides SP and CRYPTO caps too

["gaoliming" <gaoliming@byosoft.com.cn>]

Meg:
  What real problem do you meet with? What purpose is for this change? And, I also include UEFI Arch Rothman. 

Rothman:
  Can you help clarify what OS (Windows or Linux) behavior is expected for UEFI SP and CRYPTO memory attribute?

Thanks
Liming
> -----邮件原件-----
> 发件人: bounce+27952+65683+4905953+8761045@groups.io
> <bounce+27952+65683+4905953+8761045@groups.io> 代表 Malgorzata
> Kukiello
> 发送时间: 2020年9月28日 23:39
> 收件人: devel@edk2.groups.io; gaoliming@byosoft.com.cn
> 抄送: Kinney, Michael D <michael.d.kinney@intel.com>; Wang, Jian J
> <jian.j.wang@intel.com>; Wu, Hao A <hao.a.wu@intel.com>; Bi, Dandan
> <dandan.bi@intel.com>; Liu, Zhiguang <zhiguang.liu@intel.com>; 'Oleksiy
> Yakovlev' <oleksiyy@ami.com>; 'Ard Biesheuvel' <ard.biesheuvel@arm.com>
> 主题: Re: [edk2-devel] [PATCH v2 0/2] UEFI memmap workaround for hiding
> page-access caps from OSes hides SP and CRYPTO caps too
> 
> Liming,
> As for mktme there is a change commited:
> https://patchwork.kernel.org/patch/10935909/
> As for SP I can't find anything specific.
> Thanks
> Meg
> 
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of gaoliming
> Sent: Friday, September 25, 2020 10:55 AM
> To: devel@edk2.groups.io; Kukiello, Malgorzata <jacek.kukiello@intel.com>
> Cc: Kinney, Michael D <michael.d.kinney@intel.com>; Wang, Jian J
> <jian.j.wang@intel.com>; Wu, Hao A <hao.a.wu@intel.com>; Bi, Dandan
> <dandan.bi@intel.com>; Liu, Zhiguang <zhiguang.liu@intel.com>; 'Oleksiy
> Yakovlev' <oleksiyy@ami.com>; 'Ard Biesheuvel' <ard.biesheuvel@arm.com>
> Subject: 回复: [edk2-devel] [PATCH v2 0/2] UEFI memmap workaround for
> hiding page-access caps from OSes hides SP and CRYPTO caps too
> 
> Malgorzata:
>   How do know OS (Windows or Linux) behavior for SP and CRYPTO attribute?
> Is there the public document to describe this behavior?
> 
> Thanks
> Liming
> > -----邮件原件-----
> > 发件人: bounce+27952+65566+4905953+8761045@groups.io
> > <bounce+27952+65566+4905953+8761045@groups.io> 代表 Malgorzata
> Kukiello
> > 发送时间: 2020年9月24日 18:22
> > 收件人: devel@edk2.groups.io
> > 抄送: Malgorzata Kukiello <jacek.kukiello@intel.com>; Michael D Kinney
> > <michael.d.kinney@intel.com>; Jian J Wang <jian.j.wang@intel.com>; Hao
> > A Wu <hao.a.wu@intel.com>; Dandan Bi <dandan.bi@intel.com>; Liming Gao
> > <gaoliming@byosoft.com.cn>; Zhiguang Liu <zhiguang.liu@intel.com>;
> > Oleksiy Yakovlev <oleksiyy@ami.com>; Ard Biesheuvel
> > <ard.biesheuvel@arm.com>
> > 主题: [edk2-devel] [PATCH v2 0/2] UEFI memmap workaround for hiding
> > page-access caps from OSes hides SP and CRYPTO caps too
> >
> > REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2982
> >
> > The workaround in the UEFI memmap construction, near the end of the
> > function CoreGetMemoryMap() [MdeModulePkg/Core/Dxe/Mem/Page.c]
> > should
> > not clear the SP and CRYPTO bits, because OSes do (apparently)
> > correctly interpret SP and CRYPTO as capabilities, and not as
> > currently set attributes (upon which the OSes should set their page
> > tables). For this reason, the SP and CRYPTO bits should be separated
> > from the bitmask that we use for hiding the page-access attributes, in
> > the workaround
> >
> > Signed-off-by: Malgorzata Kukiello <jacek.kukiello@intel.com>
> > Cc: Michael D Kinney <michael.d.kinney@intel.com>
> > Cc: Jian J Wang <jian.j.wang@intel.com>
> > Cc: Hao A Wu <hao.a.wu@intel.com>
> > Cc: Dandan Bi <dandan.bi@intel.com>
> > Cc: Liming Gao <gaoliming@byosoft.com.cn>
> > Cc: Zhiguang Liu <zhiguang.liu@intel.com>
> > Cc: Oleksiy Yakovlev <oleksiyy@ami.com>
> > Cc: Ard Biesheuvel (ARM address) <ard.biesheuvel@arm.com>
> >
> >  MdeModulePkg/Core/Dxe/Mem/Page.c | 12 ++++++------
> >  MdePkg/Include/Uefi/UefiSpec.h   |  3 ++-
> >  2 files changed, 8 insertions(+), 7 deletions(-)
> > ---------------------------------------------------------------------
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> Intel Technology Poland sp. z o.o.
> ul. Sowackiego 173 | 80-298 Gdask | Sd Rejonowy Gdask Pnoc | VII Wydzia
> Gospodarczy Krajowego Rejestru Sdowego - KRS 101882 | NIP 957-07-52-316 |
> Kapita zakadowy 200.000 PLN.
> Ta wiadomo wraz z zacznikami jest przeznaczona dla okrelonego adresata i moe
> zawiera informacje poufne. W razie przypadkowego otrzymania tej wiadomoci,
> prosimy o powiadomienie nadawcy oraz trwae jej usunicie; jakiekolwiek
> przegldanie lub rozpowszechnianie jest zabronione.
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> use of the intended recipient(s). If you are not the intended recipient, please
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