Reviewed-by: Jian J Wang <[email protected]>
Regards, Jian > -----Original Message----- > From: Xu, Min M <[email protected]> > Sent: Saturday, March 12, 2022 9:54 AM > To: [email protected] > Cc: Xu, Min M <[email protected]>; Wang, Jian J <[email protected]>; > Wu, Hao A <[email protected]>; Brijesh Singh <[email protected]>; > Aktas, Erdem <[email protected]>; James Bottomley > <[email protected]>; Yao, Jiewen <[email protected]>; Tom Lendacky > <[email protected]>; Gerd Hoffmann <[email protected]> > Subject: [PATCH V8 35/47] MdeModulePkg: Skip setting IA32_ERER.NXE if it has > already been set > > RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429 > > If IA32_ERER.NXE has already been set, skip setting it again. > > Cc: Jian J Wang <[email protected]> > Cc: Hao A Wu <[email protected]> > Cc: Brijesh Singh <[email protected]> > Cc: Erdem Aktas <[email protected]> > Cc: James Bottomley <[email protected]> > Cc: Jiewen Yao <[email protected]> > Cc: Tom Lendacky <[email protected]> > Cc: Gerd Hoffmann <[email protected]> > Acked-by: Gerd Hoffmann <[email protected]> > Signed-off-by: Min Xu <[email protected]> > --- > MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c | 8 +++++--- > 1 file changed, 5 insertions(+), 3 deletions(-) > > diff --git a/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c > b/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c > index 0700f310b203..bb426d0d0a6f 100644 > --- a/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c > +++ b/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c > @@ -179,9 +179,11 @@ EnableExecuteDisableBit ( > { > UINT64 MsrRegisters; > > - MsrRegisters = AsmReadMsr64 (0xC0000080); > - MsrRegisters |= BIT11; > - AsmWriteMsr64 (0xC0000080, MsrRegisters); > + MsrRegisters = AsmReadMsr64 (0xC0000080); > + if ((MsrRegisters & BIT11) == 0) { > + MsrRegisters |= BIT11; > + AsmWriteMsr64 (0xC0000080, MsrRegisters); > + } > } > > /** > -- > 2.29.2.windows.2 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#87562): https://edk2.groups.io/g/devel/message/87562 Mute This Topic: https://groups.io/mt/89725436/21656 Group Owner: [email protected] Unsubscribe: https://edk2.groups.io/g/devel/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
