[Part2 PATCH v6 00/38] x86: Secure Encrypted Virtualization (AMD)

[Brijesh Singh]

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

SEV Part 1 patch series: https://marc.info/?l=kvm&m=150816835817641&w=2

--
The series is based on kvm/master commit : cc9085b68753 (Merge branch 'kvm-ppc-fixes')

Complete tree is available at:
repo: https://github.com/codomania/kvm.git
branch: sev-v6-p2

TODO:
* Add SEV guest migration command support

Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: "Radim KrÃâÃÂmÃÆÃÂÃâÃâÂ" <rkrcmar@xxxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxx>
Cc: Tom Lendacky <thomas.lendacky@xxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Gary Hook <gary.hook@xxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: kvm@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-crypto@xxxxxxxxxxxxxxx

Changes since v5:
 * split the PSP driver support into multiple patches
 * multiple improvements from Boris
 * remove mem_enc_enabled() ops

Changes since v4:
 * Fixes to address kbuild robot errors
 * Add 'sev' module params to allow enable/disable SEV feature
 * Update documentation
 * Multiple fixes to address v4 feedbacks
 * Some coding style changes to address checkpatch reports

Changes since v3:
 * Re-design the PSP interface support patch
 * Rename the ioctls based on the feedbacks
 * Improve documentation
 * Fix i386 build issues
 * Add LAUNCH_SECRET command
 * Add new Kconfig option to enable SEV support
 * Changes to address v3 feedbacks.

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


Borislav Petkov (1):
  crypto: ccp: Build the AMD secure processor driver only with AMD CPU
    support

Brijesh Singh (34):
  Documentation/virtual/kvm: Add AMD Secure Encrypted Virtualization
    (SEV)
  KVM: SVM: Prepare to reserve asid for SEV guest
  KVM: X86: Extend CPUID range to include new leaf
  KVM: Introduce KVM_MEMORY_ENCRYPT_OP ioctl
  KVM: Introduce KVM_MEMORY_ENCRYPT_{UN,}REG_REGION ioctl
  crypto: ccp: Define SEV userspace ioctl and command id
  crypto: ccp: Define SEV key management command id
  crypto: ccp: Add Platform Security Processor (PSP) device support
  crypto: ccp: Add Secure Encrypted Virtualization (SEV) command support
  crypto: ccp: Implement SEV_FACTORY_RESET ioctl command
  crypto: ccp: Implement SEV_PLATFORM_STATUS ioctl command
  crypto: ccp: Implement SEV_PEK_GEN ioctl command
  crypto: ccp: Implement SEV_PDH_GEN ioctl command
  crypto: ccp: Implement SEV_PEK_CSR ioctl command
  crypto: ccp: Implement SEV_PEK_CERT_IMPORT ioctl command
  crypto: ccp: Implement SEV_PDH_CERT_EXPORT ioctl command
  KVM: X86: Add CONFIG_KVM_AMD_SEV
  KVM: SVM: Add sev module_param
  KVM: SVM: Reserve ASID range for SEV guest
  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 KVM_SEV_LAUNCH_START command
  KVM: SVM: Add support for KVM_SEV_LAUNCH_UPDATE_DATA command
  KVM: SVM: Add support for KVM_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: Add support for SEV LAUNCH_SECRET command
  KVM: SVM: Pin guest memory when SEV is active
  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 (3):
  x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
  kvm: svm: prepare for new bit definition in nested_ctl
  kvm: svm: Add SEV feature definitions to KVM

 Documentation/virtual/kvm/00-INDEX                 |    3 +
 .../virtual/kvm/amd-memory-encryption.txt          |  201 ++++
 Documentation/virtual/kvm/api.txt                  |   50 +
 arch/x86/include/asm/cpufeatures.h                 |    1 +
 arch/x86/include/asm/kvm_host.h                    |   15 +
 arch/x86/include/asm/msr-index.h                   |    2 +
 arch/x86/include/asm/svm.h                         |    3 +
 arch/x86/kernel/cpu/amd.c                          |   66 +-
 arch/x86/kernel/cpu/scattered.c                    |    1 +
 arch/x86/kvm/Kconfig                               |   10 +
 arch/x86/kvm/cpuid.c                               |    2 +-
 arch/x86/kvm/mmu.c                                 |   10 +
 arch/x86/kvm/svm.c                                 | 1167 +++++++++++++++++++-
 arch/x86/kvm/x86.c                                 |   30 +
 drivers/crypto/ccp/Kconfig                         |   12 +
 drivers/crypto/ccp/Makefile                        |    1 +
 drivers/crypto/ccp/psp-dev.c                       |  736 ++++++++++++
 drivers/crypto/ccp/psp-dev.h                       |   80 ++
 drivers/crypto/ccp/sp-dev.c                        |   26 +
 drivers/crypto/ccp/sp-dev.h                        |   24 +-
 drivers/crypto/ccp/sp-pci.c                        |   52 +
 include/linux/psp-sev.h                            |  657 +++++++++++
 include/uapi/linux/kvm.h                           |   90 ++
 include/uapi/linux/psp-sev.h                       |  113 ++
 24 files changed, 3322 insertions(+), 30 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 include/linux/psp-sev.h
 create mode 100644 include/uapi/linux/psp-sev.h

-- 
2.9.5