SEV-SNP builds upon existing SEV and SEV-ES functionality while adding new hardware-based memory protections. SEV-SNP adds strong memory integrity protection to help prevent malicious hypervisor-based attacks like data replay, memory re-mapping and more in order to create an isolated memory encryption environment. The patches to support the SEV-SNP in Linux kernel and OVMF are available: https://lore.kernel.org/kvm/20210707181506.30489-1-brijesh.singh@xxxxxxx/ https://lore.kernel.org/kvm/20210707183616.5620-1-brijesh.singh@xxxxxxx/ https://edk2.groups.io/g/devel/message/77335?p=,,,20,0,0,0::Created,,posterid%3A5969970,20,2,20,83891508 The Qemu patches uses the command id added by the SEV-SNP hypervisor patches to bootstrap the SEV-SNP VMs. TODO: * Add support to filter CPUID values through the PSP. Additional resources --------------------- SEV-SNP whitepaper https://www.amd.com/system/files/TechDocs/SEV-SNP-strengthening-vm-isolation-with-integrity-protection-and-more.pdf APM 2: https://www.amd.com/system/files/TechDocs/24593.pdf (section 15.36) GHCB spec: https://developer.amd.com/wp-content/resources/56421.pdf SEV-SNP firmware specification: https://www.amd.com/system/files/TechDocs/56860.pdf Brijesh Singh (6): linux-header: add the SNP specific command i386/sev: extend sev-guest property to include SEV-SNP i386/sev: initialize SNP context i386/sev: add the SNP launch start context i386/sev: add support to encrypt BIOS when SEV-SNP is enabled i386/sev: populate secrets and cpuid page and finalize the SNP launch docs/amd-memory-encryption.txt | 81 +++++- linux-headers/linux/kvm.h | 47 ++++ qapi/qom.json | 6 + target/i386/sev.c | 498 ++++++++++++++++++++++++++++++++- target/i386/sev_i386.h | 1 + target/i386/trace-events | 4 + 6 files changed, 628 insertions(+), 9 deletions(-) -- 2.17.1
