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[0/6] Add initial GHCB support for SEV-ES selftests

Message ID 20240409133959.2888018-1-pgonda@google.com (mailing list archive)
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Series Add initial GHCB support for SEV-ES selftests | expand

Message

Peter Gonda April 9, 2024, 1:39 p.m. UTC 
Adding GHCB support for selftests. Very similar code to the ucall
functionality, I didn't refactor anything common out since I was unsure
with just two instances that is required. If pulling out common code
between those two is preferred please let me know. The series only adds a
single usage of the GHCB which is a special outsb GHCB exit to allow for
passing the 64-bit ucall pointer. In future series we can test more GHCB
functionality of KVM. I'd like to base some SNP smoke tests off of this
and the current SEV selftest work.

base-commit: 40e09b3ccfacc640d58e1e3d6b8f29b2db0a9848

Cc: Vishal Annapurve <vannapurve@google.com>
Cc: Ackerley Tng <ackerleytng@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Carlos Bilbao <carlos.bilbao@amd.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Michael Roth <michael.roth@amd.com>
Cc: kvm@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Signed-off-by: Peter Gonda <pgonda@google.com>

Peter Gonda (6):
  Add GHCB with setters and getters
  Add arch specific additional guest pages
  Add vm_vaddr_alloc_pages_shared()
  Add GHCB allocations and helpers
  Add is_sev_enabled() helpers
  Add ability for SEV-ES guests to use ucalls via GHCB

 tools/testing/selftests/kvm/Makefile          |   2 +-
 .../selftests/kvm/include/kvm_util_base.h     |   4 +
 .../selftests/kvm/include/x86_64/sev.h        |   7 +
 .../selftests/kvm/include/x86_64/svm.h        | 106 +++++++++++++
 tools/testing/selftests/kvm/lib/kvm_util.c    |  22 ++-
 .../selftests/kvm/lib/x86_64/processor.c      |   8 +
 tools/testing/selftests/kvm/lib/x86_64/sev.c  | 149 ++++++++++++++++++
 .../testing/selftests/kvm/lib/x86_64/ucall.c  |  17 ++
 .../selftests/kvm/x86_64/sev_smoke_test.c     |  22 +--
 9 files changed, 313 insertions(+), 24 deletions(-)