On Wed, Dec 22, 2021 at 03:56:23PM +0100, Paolo Bonzini wrote:
On 12/16/21 18:13, Michael Roth wrote:
These patches and are also available at:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com...
They are based on top of the recent RFC:
"KVM: selftests: Add support for test-selectable ucall implementations" https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kerne...
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com...
which provides a new ucall implementation that this series relies on. Those patches were in turn based on kvm/next as of 2021-12-10.
Looks good, apart from the cleanups that Peter pointed out in patch 7.
When you send the next version, you can keep it based on the same ucall RFC, even if I haven't yet pushed them (which I'll do only after testing on s390).
Hi Paolo,
Didn't manage to get these out before going on break, but back in office now and will get an updated version out as soon as we figure out a plan for implementing some of Sean's recent suggestions for the ucall side of things.
Thanks,
Mike
Thanks,
Paolo
== OVERVIEW ==
This series introduces a set of memory encryption-related parameter/hooks in the core kselftest library, then uses the hooks to implement a small library for creating/managing SEV, SEV-ES, and (eventually) SEV-SNP guests. This library is then used to implement a basic boot/memory test that's run for variants of SEV/SEV-ES guests.
- Patches 1-8 implement SEV boot tests and should run against existing kernels
- Patch 9 is a KVM changes that's required to allow SEV-ES/SEV-SNP guests to boot with an externally generated page table, and is a host kernel prequisite for the remaining patches in the series.
- Patches 10-13 extend the boot tests to cover SEV-ES
Any review/comments are greatly appreciated!
v2:
- rebased on ucall_ops patchset (which is based on kvm/next 2021-12-10)
- remove SEV-SNP support for now
- provide encryption bitmap as const* to original rather than as a copy (Mingwei, Paolo)
- drop SEV-specific synchronization helpers in favor of ucall_ops_halt (Paolo)
- don't pass around addresses with c-bit included, add them as-needed via addr_gpa2raw() (e.g. when adding PTEs, or initializing initial cr3/vm->pgd) (Paolo)
- rename lib/sev.c functions for better consistency (Krish)
- move more test setup code out of main test function and into setup_test_common() (Krish)
- suppress compiler warnings due to -Waddress-of-packed-member like kernel does
- don't require SNP support in minimum firmware version detection (Marc)
- allow SEV device path to be configured via make SEV_PATH= (Marc)
Michael Roth (13): KVM: selftests: move vm_phy_pages_alloc() earlier in file KVM: selftests: sparsebit: add const where appropriate KVM: selftests: add hooks for managing encrypted guest memory KVM: selftests: handle encryption bits in page tables KVM: selftests: add support for encrypted vm_vaddr_* allocations KVM: selftests: ensure ucall_shared_alloc() allocates shared memory KVM: selftests: add library for creating/interacting with SEV guests KVM: selftests: add SEV boot tests KVM: SVM: include CR3 in initial VMSA state for SEV-ES guests KVM: selftests: account for error code in #VC exception frame KVM: selftests: add support for creating SEV-ES guests KVM: selftests: add library for handling SEV-ES-related exits KVM: selftests: add SEV-ES boot tests
arch/x86/include/asm/kvm-x86-ops.h | 1 + arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/svm/svm.c | 19 ++ arch/x86/kvm/vmx/vmx.c | 6 + arch/x86/kvm/x86.c | 1 + tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 10 +- .../testing/selftests/kvm/include/kvm_util_base.h | 10 + tools/testing/selftests/kvm/include/sparsebit.h | 36 +-- tools/testing/selftests/kvm/include/x86_64/sev.h | 44 +++ .../selftests/kvm/include/x86_64/sev_exitlib.h | 14 + tools/testing/selftests/kvm/include/x86_64/svm.h | 35 +++ .../selftests/kvm/include/x86_64/svm_util.h | 1 + tools/testing/selftests/kvm/lib/kvm_util.c | 270 ++++++++++++------ .../testing/selftests/kvm/lib/kvm_util_internal.h | 10 + tools/testing/selftests/kvm/lib/sparsebit.c | 48 ++-- tools/testing/selftests/kvm/lib/ucall_common.c | 4 +- tools/testing/selftests/kvm/lib/x86_64/handlers.S | 4 +- tools/testing/selftests/kvm/lib/x86_64/processor.c | 16 +- tools/testing/selftests/kvm/lib/x86_64/sev.c | 252 ++++++++++++++++ .../testing/selftests/kvm/lib/x86_64/sev_exitlib.c | 249 ++++++++++++++++ .../selftests/kvm/x86_64/sev_all_boot_test.c | 316 +++++++++++++++++++++ 22 files changed, 1215 insertions(+), 133 deletions(-) create mode 100644 tools/testing/selftests/kvm/include/x86_64/sev.h create mode 100644 tools/testing/selftests/kvm/include/x86_64/sev_exitlib.h create mode 100644 tools/testing/selftests/kvm/lib/x86_64/sev.c create mode 100644 tools/testing/selftests/kvm/lib/x86_64/sev_exitlib.c create mode 100644 tools/testing/selftests/kvm/x86_64/sev_all_boot_test.c