[RFC PATCH v2 0/6] KVM: gmem: Implement test cases for error_remove_page

[isaku . yamahata]

From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>

This patch series is to implement test cases for the KVM gmem error_remove_page
method.
- Update punch hole method to truncate pages
- Add a new ioctl KVM_GUEST_MEMORY_FAILURE to inject memory failure on
  offset of gmem

TODO:
- Update TDX KVM to handle it and Add test cases for TDX.
  This will be done by its own patch series.

Changes:
v2:
- rebased to [RFC PATCH v12 00/33] KVM: guest_memfd() and per-page attributes
  https://lore.kernel.org/all/20230914015531.1419405-1-seanjc@xxxxxxxxxx/
- introduce new ioctl to inject memory fault on gmem and drop FIBMAP hack
- Implement test cases

v1:
https://lore.kernel.org/all/cover.1694599703.git.isaku.yamahata@xxxxxxxxx/

Isaku Yamahata (6):
  KVM: gmem: Truncate pages on punch hole
  KVM: selftests: Add negative test cases for punch hole for
    guest_memfd()
  KVM: selftests: Add tests for punch hole on guest_memfd
  KVM: gmem: Add ioctl to inject memory failure on guest memfd
  KVM: selftests: Add test cases for KVM_GUEST_MEMORY_FAILURE
  KVM: guest_memfd: selftest: Add test case for error_remove_page method

 include/uapi/linux/kvm.h                      |   6 +
 tools/testing/selftests/kvm/Makefile          |   1 +
 .../testing/selftests/kvm/guest_memfd_test.c  |  80 ++++
 .../kvm/x86_64/private_mem_conversions_test.c |  26 +-
 .../kvm/x86_64/private_mem_hwpoison_test.c    | 367 ++++++++++++++++++
 virt/kvm/guest_mem.c                          |  82 +++-
 6 files changed, 554 insertions(+), 8 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/x86_64/private_mem_hwpoison_test.c


base-commit: 42dc814987c1feb6410904e58cfd4c36c4146150
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prerequisite-patch-id: eede5382aa76c0602a853fc93a1450995c651345
prerequisite-patch-id: 5549aad02248eb5a0c2853058dc7c102044c7a9d
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prerequisite-patch-id: e1692d657690f974d836ba3efdd277ea82e675ca
prerequisite-patch-id: 747debe72334ef0cd12bbb42d1acb281eb59cd98
prerequisite-patch-id: 2d1df1bad8af51577ec15a37510ea8bf018b0d4f
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prerequisite-patch-id: b6a6a8916fe89e7da1fadefb7d311960732e0faf
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2.25.1