[PATCH V7 0/8] KVM: selftests: Add simple SEV test

[PATCH V7 0/8] KVM: selftests: Add simple SEV test

[Peter Gonda]

This patch series continues the work Michael Roth has done in supporting
SEV guests in selftests. It continues on top of the work Sean
Christopherson has sent to support ucalls from SEV guests. Along with a
very simple version of the SEV selftests Michael originally proposed.

V7
 * Thanks to Sean for the branch: 
 https://github.com/sean-jc/linux/tree/x86/sev_selftests_for_peter. This
 series is now based on that.
 * I kept is_pt_protected because without it the page tables are never
 readable. Its used for the elf loading in kvm_vm_elf_load().

V6
 * Updated SEV VM create function based on Seanjc's feedback and new
   changes to VM creation functions.
 * Removed pte_me_mask based on feedback.
 * Fixed s_bit usage based on TDX
 * Fixed bugs and took Ackerly's code for enc_region setup code.

V5
 * Rebase onto seanjc@'s latest ucall pool series.
 * More review changes based on seanjc:
 ** use protected instead of encrypted outside of SEV specific files
 ** Swap memcrypt struct for kvm_vm_arch arch specific struct
 ** Make protected page table data agnostic of address bit stealing specifics
    of SEV
 ** Further clean up for SEV library to just vm_sev_create_one_vcpu()
 * Due to large changes moved more authorships from mroth@ to pgonda@. Gave
   originally-by tags to mroth@ as suggested by Seanjc for this.

V4
 * Rebase ontop of seanjc@'s latest Ucall Pool series:
   https://lore.kernel.org/linux-arm-kernel/20220825232522.3997340-8-seanjc@google.com/
 * Fix up review comments from seanjc
 * Switch authorship on 2 patches because of significant changes, added
 * Michael as suggested-by or originally-by.

V3
 * Addressed more of andrew.jones@ in ucall patches.
 * Fix build in non-x86 archs.

V2
 * Dropped RFC tag
 * Correctly separated Sean's ucall patches into 2 as originally
   intended.
 * Addressed andrew.jones@ in ucall patches.
 * Fixed ucall pool usage to work for other archs

V1
 * https://lore.kernel.org/all/20220715192956.1873315-1-pgonda@google.com/

Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: seanjc@google.com
Cc: michael.roth@amd.com
Cc: thomas.lendacky@amd.com
Cc: joro@8bytes.org
Cc: pbonzini@redhat.com
Cc: andrew.jones@linux.dev
Cc: vannapurve@google.com
Cc: ackerleytng@google.com

Michael Roth (2):
  KVM: selftests: Make sparsebit structs const where appropriate
  KVM: selftests: add support for protected vm_vaddr_* allocations

Peter Gonda (6):
  KVM: selftests: Extend VM creation's @mode to allow control of VM
    subtype
  KVM: selftests: add hooks for managing protected guest memory
  KVM: selftests: Allow tagging protected memory in guest page tables
  KVM: selftests: add library for creating/interacting with SEV guests
  KVM: selftests: Update ucall pool to allocate from shared memory
  KVM: selftests: Add simple sev vm testing

 include/uapi/linux/kvm.h                      |   2 +-
 tools/arch/arm64/include/asm/kvm_host.h       |   7 +
 tools/arch/riscv/include/asm/kvm_host.h       |   7 +
 tools/arch/s390/include/asm/kvm_host.h        |   7 +
 tools/arch/x86/include/asm/kvm_host.h         |  15 ++
 tools/testing/selftests/kvm/Makefile          |   2 +
 .../selftests/kvm/include/kvm_util_base.h     | 113 +++++++---
 .../testing/selftests/kvm/include/sparsebit.h |  58 +++--
 .../selftests/kvm/include/x86_64/processor.h  |   2 +
 .../selftests/kvm/include/x86_64/sev.h        |  27 +++
 tools/testing/selftests/kvm/lib/guest_modes.c |   2 +-
 tools/testing/selftests/kvm/lib/kvm_util.c    | 103 ++++++---
 tools/testing/selftests/kvm/lib/sparsebit.c   |  48 ++---
 .../testing/selftests/kvm/lib/ucall_common.c  |   3 +-
 .../selftests/kvm/lib/x86_64/processor.c      |  31 ++-
 tools/testing/selftests/kvm/lib/x86_64/sev.c  | 202 ++++++++++++++++++
 .../selftests/kvm/x86_64/sev_all_boot_test.c  |  59 +++++
 17 files changed, 585 insertions(+), 103 deletions(-)
 create mode 100644 tools/arch/arm64/include/asm/kvm_host.h
 create mode 100644 tools/arch/riscv/include/asm/kvm_host.h
 create mode 100644 tools/arch/s390/include/asm/kvm_host.h
 create mode 100644 tools/arch/x86/include/asm/kvm_host.h
 create mode 100644 tools/testing/selftests/kvm/include/x86_64/sev.h
 create mode 100644 tools/testing/selftests/kvm/lib/x86_64/sev.c
 create mode 100644 tools/testing/selftests/kvm/x86_64/sev_all_boot_test.c

-- 
2.43.0.472.g3155946c3a-goog

Re: [PATCH V7 0/8] KVM: selftests: Add simple SEV test

[Sean Christopherson]

On Mon, Dec 18, 2023, Peter Gonda wrote:
> This patch series continues the work Michael Roth has done in supporting
> SEV guests in selftests. It continues on top of the work Sean
> Christopherson has sent to support ucalls from SEV guests. Along with a
> very simple version of the SEV selftests Michael originally proposed.

I'll post a v8 this week, I've already done (almost) all of the changes needed to
get this into shape.