This part of Secure Encryted Virtualization (SEV) patch series focuses on KVM changes required to create and manage SEV guests.
SEV is an extension to the AMD-V architecture which supports running encrypted virtual machine (VMs) under the control of a hypervisor. Encrypted VMs have their pages (code and data) secured such that only the guest itself has access to unencrypted version. Each encrypted VM is associated with a unique encryption key; if its data is accessed to a different entity using a different key the encrypted guest's data will be incorrectly decrypted, leading to unintelligible data. This security model ensures that hypervisor will no longer able to inspect or alter any guest code or data. The key management of this feature is handled by a separate processor known as the AMD Secure Processor (AMD-SP) which is present on AMD SOCs. The SEV Key Management Specification (see below) provides a set of commands which can be used by hypervisor to load virtual machine keys through the AMD-SP driver. The patch series adds a new ioctl in KVM driver (KVM_MEMORY_ENCRYPTION_OP). The ioctl will be used by qemu to issue SEV guest-specific commands defined in Key Management Specification. The following links provide additional details: AMD Memory Encryption whitepaper: http://amd-dev.wpengine.netdna-cdn.com/wordpress/media/2013/12/AMD_Memory_Encryption_Whitepaper_v7-Public.pdf AMD64 Architecture Programmer's Manual: http://support.amd.com/TechDocs/24593.pdf SME is section 7.10 SEV is section 15.34 Secure Encrypted Virutualization Key Management: http://support.amd.com/TechDocs/55766_SEV-KM API_Specification.pdf KVM Forum Presentation: http://www.linux-kvm.org/images/7/74/02x08A-Thomas_Lendacky-AMDs_Virtualizatoin_Memory_Encryption_Technology.pdf SEV Guest BIOS support: SEV support has been interated into EDKII/OVMF BIOS https://github.com/tianocore/edk2 RFC part1: http://marc.info/?l=kvm&m=150092330804060&w=2 --- This RFC is based on tip/master commit : 22db3de (Merge branch 'x86/mm'). Complete git tree is available: https://github.com/codomania/tip/tree/sev-rfc-3 TODO: * Add SEV guest migration command support Cc: Herbert Xu <herb...@gondor.apana.org.au> Cc: David S. Miller <da...@davemloft.net> Cc: Gary Hook <gary.h...@amd.com> Cc: linux-crypto@vger.kernel.org Changes since v2: * Add KVM_MEMORY_ENCRYPT_REGISTER/UNREGISTER_RAM ioct to register encrypted memory ranges (recommend by Paolo) * Extend kvm_x86_ops to provide new memory_encryption_enabled ops * Enhance DEBUG DECRYPT/ENCRYPT commands to work with more than one page (recommended by Paolo) * Optimize LAUNCH_UPDATE command to reduce the number of calls to AMD-SP driver * Changes to address v2 feedbacks Brijesh Singh (24): Documentation/virtual/kvm: Add AMD Secure Encrypted Virtualization (SEV) crypto: ccp: Add Platform Security Processor (PSP) device support crypto: ccp: Add Secure Encrypted Virtualization (SEV) device support KVM: SVM: Prepare to reserve asid for SEV guest KVM: SVM: Reserve ASID range for SEV guest KVM: X86: Extend CPUID range to include new leaf KVM: Introduce KVM_MEMORY_ENCRYPT_OP ioctl KVM: Introduce KVM_MEMORY_ENCRYPT_REGISTER/UNREGISTER_RAM ioctl KVM: X86: Extend struct kvm_arch to include SEV information KVM: Define SEV key management command id KVM: SVM: Add KVM_SEV_INIT command KVM: SVM: VMRUN should use assosiated ASID when SEV is enabled KVM: SVM: Add support for SEV LAUNCH_START command KVM: SVM: Add support for SEV LAUNCH_UPDATE_DATA command KVM: SVM: Add support for SEV LAUNCH_MEASURE command KVM: SVM: Add support for SEV LAUNCH_FINISH command KVM: svm: Add support for SEV GUEST_STATUS command KVM: SVM: Add support for SEV DEBUG_DECRYPT command KVM: SVM: Add support for SEV DEBUG_ENCRYPT command KVM: SVM: Pin guest memory when SEV is active KVM: X86: Add memory encryption enabled ops KVM: SVM: Clear C-bit from the page fault address KVM: SVM: Do not install #UD intercept when SEV is enabled KVM: X86: Restart the guest when insn_len is zero and SEV is enabled Tom Lendacky (2): KVM: SVM: Prepare for new bit definition in nested_ctl KVM: SVM: Add SEV feature definitions to KVM .../virtual/kvm/amd-memory-encryption.txt | 328 ++++++ arch/x86/include/asm/kvm_host.h | 17 + arch/x86/include/asm/svm.h | 3 + arch/x86/kvm/cpuid.c | 2 +- arch/x86/kvm/mmu.c | 17 + arch/x86/kvm/svm.c | 1221 +++++++++++++++++++- arch/x86/kvm/x86.c | 48 + drivers/crypto/ccp/Kconfig | 19 + drivers/crypto/ccp/Makefile | 2 + drivers/crypto/ccp/psp-dev.c | 230 ++++ drivers/crypto/ccp/psp-dev.h | 109 ++ drivers/crypto/ccp/sev-dev.c | 416 +++++++ drivers/crypto/ccp/sev-dev.h | 67 ++ drivers/crypto/ccp/sev-ops.c | 457 ++++++++ drivers/crypto/ccp/sp-dev.c | 43 + drivers/crypto/ccp/sp-dev.h | 41 +- drivers/crypto/ccp/sp-pci.c | 46 + include/linux/psp-sev.h | 683 +++++++++++ include/uapi/linux/kvm.h | 159 +++ include/uapi/linux/psp-sev.h | 110 ++ 20 files changed, 4010 insertions(+), 8 deletions(-) create mode 100644 Documentation/virtual/kvm/amd-memory-encryption.txt create mode 100644 drivers/crypto/ccp/psp-dev.c create mode 100644 drivers/crypto/ccp/psp-dev.h create mode 100644 drivers/crypto/ccp/sev-dev.c create mode 100644 drivers/crypto/ccp/sev-dev.h create mode 100644 drivers/crypto/ccp/sev-ops.c create mode 100644 include/linux/psp-sev.h create mode 100644 include/uapi/linux/psp-sev.h -- Brijesh Singh 2.9.4
