This series implements selftests targeting the feature floated by Chao via: https://lore.kernel.org/linux-mm/20220519153713.819591-1-chao.p.peng@xxxxxxxxxxxxxxx/ Below changes aim to test the fd based approach for guest private memory in context of SEV/SEV-ES VMs executing on AMD SEV/SEV-ES compatible platforms. This series has dependency on following patch series: 1) V6 series patches from Chao mentioned above. 2) https://lore.kernel.org/all/20211210164620.11636-1-michael.roth@xxxxxxx/T/ - KVM: selftests: Add support for test-selectable ucall implementations series by Michael Roth 3) https://lore.kernel.org/kvm/20220104234129.dvpv3o3tihvzsqcr@xxxxxxx/T/ - KVM: selftests: Add tests for SEV and SEV-ES guests series by Michael Roth And few additional patches: * https://github.com/vishals4gh/linux/commit/2cb215cb6b4dff7fdf703498165179626c0cdfc7 - Confidential platforms along with the confidentiality aware software stack support a notion of private/shared accesses from the confidential VMs. Generally, a bit in the GPA conveys the shared/private-ness of the access. SEV/SEV-ES implementation doesn't expose the encryption bit information via fault address to KVM and so this hack is still needed to signal private/shared access ranges to the kvm. * https://github.com/vishals4gh/linux/commit/81a7d24231f6b8fb4174bbf97ed733688e8dbc0c Github link for the patches posted as part of this series: https://github.com/vishals4gh/linux/commits/sev_upm_selftests_rfc_v1 sev_priv_memfd_test.c file adds a suite of selftests to access private memory from the SEV/SEV-ES guests via private/shared accesses and checking if the contents can be leaked to/accessed by vmm via shared memory view. To allow SEV/SEV-ES VMs to toggle the encryption bit during memory conversion, support is added for mapping guest pagetables to guest va ranges and passing the mapping information to guests via shared pages. Vishal Annapurve (3): selftests: kvm: x86_64: Add support for pagetable tracking selftests: kvm: sev: Handle hypercall exit selftests: kvm: sev: Port UPM selftests onto SEV/SEV-ES VMs tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/include/kvm_util_base.h | 98 ++ tools/testing/selftests/kvm/lib/kvm_util.c | 81 +- .../selftests/kvm/lib/kvm_util_internal.h | 9 + .../selftests/kvm/lib/x86_64/processor.c | 36 + .../selftests/kvm/lib/x86_64/sev_exitlib.c | 39 +- .../kvm/x86_64/sev_priv_memfd_test.c | 1511 +++++++++++++++++ 8 files changed, 1770 insertions(+), 6 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86_64/sev_priv_memfd_test.c -- 2.36.1.124.g0e6072fb45-goog
