mirror of https://github.com/acidanthera/audk.git
a89f558d3c
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4123 VmgExitLib once was designed to provide interfaces to support #VC handler and issue VMGEXIT instruction. After TDVF (enable TDX feature in OVMF) is introduced, this library is updated to support #VE as well. Now the name of VmgExitLib cannot reflect what the lib does. This patch renames VmgExitLib to CcExitLib (Cc means Confidential Computing). This is a simple renaming and there is no logic changes. After renaming all the VmgExitLib related codes are updated with CcExitLib. These changes are in OvmfPkg/UefiCpuPkg/UefiPayloadPkg. Cc: Guo Dong <guo.dong@intel.com> Cc: Sean Rhodes <sean@starlabs.systems> Cc: James Lu <james.lu@intel.com> Cc: Gua Guo <gua.guo@intel.com> Cc: Eric Dong <eric.dong@intel.com> Cc: Ray Ni <ray.ni@intel.com> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Erdem Aktas <erdemaktas@google.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: James Bottomley <jejb@linux.ibm.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: James Lu <james.lu@intel.com> Reviewed-by: Gua Guo <gua.guo@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Reviewed-by: Ray Ni <ray.ni@intel.com> Signed-off-by: Min Xu <min.m.xu@intel.com> |
||
|---|---|---|
| .. | ||
| PrePiHobListPointerLibTdx | ||
| Sec | ||
| TdTcg2Dxe | ||
| IntelTdxX64.dsc | ||
| IntelTdxX64.fdf | ||
| README | ||
README
TDVF Overview ------------- <b>Intel Trust Domain Extension (TDX)</b> is Intel Architecture extension to provide trusted, isolated VM execution by removing CSP software (hypervisor etc) from the TCB. <b>TDX Virtual Firmware (TDVF)</b> is an EDK II based project to enable UEFI support for TDX based Virtual Machines. It provides the capability to launch a TD. The <b>Intel? TDX Virtual Firmware Design Guide</b> is at https://www.intel.com/content/dam/develop/external/us/en/documents/tdx-virtual-firmware-design-guide-rev-1.01.pdf. More information can be found at: https://www.intel.com/content/www/us/en/developer/articles/technical/intel-trust-domain-extensions.html Configurations and Features ---------------------------- There are 2 configurations for TDVF. <b>Config-A:</b> - Merge the *basic* TDVF feature to existing OvmfX64Pkg.dsc. (Align with existing SEV) - Threat model: VMM is NOT out of TCB. (We don?t make things worse) - The OvmfX64Pkg.dsc includes SEV/TDX/normal OVMF basic boot capability. The final binary can run on SEV/TDX/normal OVMF. - No changes to existing OvmfPkgX64 image layout. - No need to add additional security features if they do not exist today. - No need to remove features if they exist today. - RTMR is not supported. - PEI phase is NOT skipped in either Td or Non-Td. <b>Config-B:</b> - (*) Add a standalone IntelTdx.dsc to a TDX specific directory for a *full* feature TDVF.(Align with existing SEV) - (*) Threat model: VMM is out of TCB. (We need necessary change to prevent attack from VMM) - (*) IntelTdx.dsc includes TDX/normal OVMF basic boot capability. The final binary can run on TDX/normal OVMF. - It might eventually merge with AmdSev.dsc, but NOT at this point of time. And we don?t know when it will happen. We need sync with AMD in the community after both of us think the solutions are mature to merge. - Need to add necessary security feature as mandatory requirement, such as RTMR based Trusted Boot support. - Need to measure the external input from Host VMM, such as TdHob, CFV. - Need to measure other external input, such as FW_CFG data, os loader, initrd, etc. - Need to remove unnecessary attack surfaces, such as network stack. In current stage, <b>Config-A</b> has been merged into edk2-master branch. The corresponding pkg file is OvmfPkg/OvmfPkgX64.dsc. <b>Config-B</b> is split into several waves. The corresponding pkg file is OvmfPkg/IntelTdx/IntelTdxX64.dsc. The features with (*) have been implemented and merged into edk2-master branch. Others are in upstreaming progress. Build ------ - Build the TDVF (Config-A) target: `cd /path/to/edk2` `source edksetup.sh` `build.sh -p OvmfPkg/OvmfPkgX64.dsc -a X64 -t GCC5` - Build the TDVF (Config-B) target: `cd /path/to/edk2` `set PACKAGES_PATH=/path/to/edk2/OvmfPkg` `source edksetup.sh` `build.sh -p OvmfPkg/IntelTdx/IntelTdxX64.dsc -a X64 -t GCC5` Usage ----- Assuming TDX-QEMU/TDX-KVM are already built, one can start a TD virtual machine as [launching-td-guest](https://github.com/intel/qemu-tdx/blob/tdx-qemu-upstream-rfc-v3/docs/system/i386/tdx.rst#launching-a-td-tdx-vm): `qemu_system_x86 \` ` -machine ...,confidential-guest-support=tdx0 \` ` -object tdx-guest,id=tdx0,[sept-ve-disable=off] \` ` -drive if=pflash,format=raw,unit=0,file=/path/to/OVMF_CODE.fd \` ` -drive if=pflash,format=raw,unit=1,file=/path/to/OVMF_VARS.fd \` Note: TDX-QEMU/TDX-KVM are still in upstreaming progress. Please refer to: - kvm : https://github.com/intel/tdx/tree/kvm-upstream - qemu : https://github.com/intel/qemu-tdx/blob/tdx-qemu-upstream-rfc-v3 Once above 2 upstreaming are completed a minimum qemu/kvm version will be updated here.