[v2,0/6] Add printf and formatted asserts in the guest

Message

Aaron Lewis April 24, 2023, 10:58 p.m. UTC

Extend the ucall framework to offer GUEST_PRINTF() and GUEST_ASSERT_FMT()
in selftests.  This will allow for better and easier guest debugging.

v1 -> v2:
 - Added a proper selftest [Sean]
 - Added support for snprintf [Shaoqin]
 - Added ucall_nr_pages_required() [Sean]
 - Added ucall_fmt2() for GUEST_ASSERT_FMT()
 - Dropped the original version of printf.c [Sean]
 - Dropped patches 1-2 and 8 [Sean]

Aaron Lewis (6):
  KVM: selftests: Add strnlen() to the string overrides
  KVM: selftests: Add kvm_snprintf() to KVM selftests
  KVM: selftests: Add additional pages to the guest to accommodate ucall
  KVM: selftests: Add string formatting options to ucall
  KVM: selftests: Add ucall_fmt2()
  KVM: selftests: Add a selftest for guest prints and formatted asserts

 tools/testing/selftests/kvm/Makefile          |   3 +
 .../testing/selftests/kvm/guest_print_test.c  | 207 ++++++++++++
 .../testing/selftests/kvm/include/test_util.h |   3 +
 .../selftests/kvm/include/ucall_common.h      |  20 ++
 tools/testing/selftests/kvm/lib/kvm_sprintf.c | 313 ++++++++++++++++++
 tools/testing/selftests/kvm/lib/kvm_util.c    |   4 +
 .../selftests/kvm/lib/string_override.c       |   9 +
 .../testing/selftests/kvm/lib/ucall_common.c  |  47 +++
 8 files changed, 606 insertions(+)
 create mode 100644 tools/testing/selftests/kvm/guest_print_test.c
 create mode 100644 tools/testing/selftests/kvm/lib/kvm_sprintf.c