This is the edk2 side of the qemu patch series posted last week to qemu-devel: https://lists.gnu.org/archive/html/qemu-devel/2023-11/msg03714.html
The driver forwards MM calls to the virtualization host instead of the MM code running in SMM (x64) or el3 (arm) mode. The functionality traditionally implemented by the SMM code is provided by qemu instead. This allows to provide persistent variable support without an (virtual) flash device and it also allows to support secure boot without depending on SMM or el3 emulation support in the hypervisor. take care, Gerd Gerd Hoffmann (7): OvmfPkg: add IndustryStandard/QemuUefiVars.h OvmfPkg: add new VirtMmCommunicationDxe driver OvmfPkg/OvmfPkgX64: add QEMU_VARS option OvmfPkg: add PcdQemuVarsRequire OvmfPkg/VirtMmCommunicationDxe: stop on init failure OvmfPkg/VirtMmCommunicationDxe: add arm support ArmVirtPkg/ArmVirtQemu: add QEMU_VARS option OvmfPkg/OvmfPkg.dec | 3 + ArmVirtPkg/ArmVirt.dsc.inc | 3 + ArmVirtPkg/ArmVirtQemu.dsc | 11 + ArmVirtPkg/ArmVirtQemuKernel.dsc | 11 + OvmfPkg/OvmfPkgX64.dsc | 17 +- OvmfPkg/OvmfPkgX64.fdf | 12 +- OvmfPkg/PlatformPei/PlatformPei.inf | 1 + .../VirtMmCommunication.inf | 67 +++ .../Include/IndustryStandard/QemuUefiVars.h | 41 ++ .../VirtMmCommunication.h | 37 ++ OvmfPkg/PlatformPei/Platform.c | 4 + OvmfPkg/VirtMmCommunicationDxe/QemuFdt.c | 208 ++++++++++ OvmfPkg/VirtMmCommunicationDxe/QemuX64.c | 106 +++++ .../VirtMmCommunication.c | 390 ++++++++++++++++++ ArmVirtPkg/ArmVirtQemuFvMain.fdf.inc | 5 + 15 files changed, 914 insertions(+), 2 deletions(-) create mode 100644 OvmfPkg/VirtMmCommunicationDxe/VirtMmCommunication.inf create mode 100644 OvmfPkg/Include/IndustryStandard/QemuUefiVars.h create mode 100644 OvmfPkg/VirtMmCommunicationDxe/VirtMmCommunication.h create mode 100644 OvmfPkg/VirtMmCommunicationDxe/QemuFdt.c create mode 100644 OvmfPkg/VirtMmCommunicationDxe/QemuX64.c create mode 100644 OvmfPkg/VirtMmCommunicationDxe/VirtMmCommunication.c -- 2.42.0 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#111684): https://edk2.groups.io/g/devel/message/111684 Mute This Topic: https://groups.io/mt/102767943/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
