KVM: selftests: Add a basic SEV-ES smoke test

Browse source

Extend sev_smoke_test to also run a minimal SEV-ES smoke test so that it's
possible to test KVM's unique VMRUN=>#VMEXIT path for SEV-ES guests
without needing a full blown SEV-ES capable VM, which requires a rather
absurd amount of properly configured collateral.

Punt on proper GHCB and ucall support, and instead use the GHCB MSR
protocol to signal test completion.  The most important thing at this
point is to have _any_ kind of testing of KVM's __svm_sev_es_vcpu_run().

Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Michael Roth <michael.roth@amd.com>
Cc: Peter Gonda <pgonda@google.com>
Cc: Carlos Bilbao <carlos.bilbao@amd.com>
Tested-by: Carlos Bilbao <carlos.bilbao@amd.com>
Link: https://lore.kernel.org/r/20240223004258.3104051-12-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

...

This commit is contained in:

Sean Christopherson 2024-02-22 16:42:58 -08:00

parent be250ff437

commit 40e09b3ccf

4 changed files with 38 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

tools/testing/selftests/kvm/include/x86_64/sev.h

View file

2

tools/testing/selftests/kvm/lib/x86_64/processor.c

View file

6

tools/testing/selftests/kvm/lib/x86_64/sev.c

View file

30

tools/testing/selftests/kvm/x86_64/sev_smoke_test.c

View file