Re: [edk2-devel] [PATCH v10 45/46] UefiCpuPkg/MpInitLib: Prepare SEV-ES guest APs for OS use

2020-07-14 Thread Dong, Eric
Reviewed-by: Eric Dong > -Original Message- > From: Tom Lendacky > Sent: Tuesday, July 14, 2020 10:38 PM > To: devel@edk2.groups.io > Cc: Brijesh Singh ; Ard Biesheuvel > ; Dong, Eric ; Justen, > Jordan L ; Laszlo Ersek ; > Gao, Liming ; Kinney, Michael D > ; Ni, Ray > Subject: [PATCH

[edk2-devel] [PATCH v10 45/46] UefiCpuPkg/MpInitLib: Prepare SEV-ES guest APs for OS use

2020-07-14 Thread Lendacky, Thomas
From: Tom Lendacky BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198 Before UEFI transfers control to the OS, it must park the AP. This is done using the AsmRelocateApLoop function to transition into 32-bit non-paging mode. For an SEV-ES guest, a few additional things must be done: -