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: [email protected] > <[email protected]> 代表 Malgorzata > Kukiello > 发送时间: 2020年9月28日 23:39 > 收件人: [email protected]; [email protected] > 抄送: Kinney, Michael D <[email protected]>; Wang, Jian J > <[email protected]>; Wu, Hao A <[email protected]>; Bi, Dandan > <[email protected]>; Liu, Zhiguang <[email protected]>; 'Oleksiy > Yakovlev' <[email protected]>; 'Ard Biesheuvel' <[email protected]> > 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: [email protected] <[email protected]> On Behalf Of gaoliming > Sent: Friday, September 25, 2020 10:55 AM > To: [email protected]; Kukiello, Malgorzata <[email protected]> > Cc: Kinney, Michael D <[email protected]>; Wang, Jian J > <[email protected]>; Wu, Hao A <[email protected]>; Bi, Dandan > <[email protected]>; Liu, Zhiguang <[email protected]>; 'Oleksiy > Yakovlev' <[email protected]>; 'Ard Biesheuvel' <[email protected]> > 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: [email protected] > > <[email protected]> 代表 Malgorzata > Kukiello > > 发送时间: 2020年9月24日 18:22 > > 收件人: [email protected] > > 抄送: Malgorzata Kukiello <[email protected]>; Michael D Kinney > > <[email protected]>; Jian J Wang <[email protected]>; Hao > > A Wu <[email protected]>; Dandan Bi <[email protected]>; Liming Gao > > <[email protected]>; Zhiguang Liu <[email protected]>; > > Oleksiy Yakovlev <[email protected]>; Ard Biesheuvel > > <[email protected]> > > 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 <[email protected]> > > Cc: Michael D Kinney <[email protected]> > > Cc: Jian J Wang <[email protected]> > > Cc: Hao A Wu <[email protected]> > > Cc: Dandan Bi <[email protected]> > > Cc: Liming Gao <[email protected]> > > Cc: Zhiguang Liu <[email protected]> > > Cc: Oleksiy Yakovlev <[email protected]> > > Cc: Ard Biesheuvel (ARM address) <[email protected]> > > > > MdeModulePkg/Core/Dxe/Mem/Page.c | 12 ++++++------ > > MdePkg/Include/Uefi/UefiSpec.h | 3 ++- > > 2 files changed, 8 insertions(+), 7 deletions(-) > > --------------------------------------------------------------------- > > Intel Technology Poland sp. z o.o. > > ul. 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