[PATCH 0/2] 52-bit VA guest mode ID support

[Itaru Kitayama <itaru.kitayama@fujitsu.com>]

This patch series extends the arm64 KVM selftest framework
to support 52-bit guest virtual address (VA) modes in addition to
the existing 52-bit physical address (PA) configurations.
The motivation is to enable validation of LPA2 guest memory-management
behaviour in configurations that use a 52-bit VA space.
While the selftest framework already supports testing 52-bit PA
configurations, it lacks the ability to exercise guests running with
52-bit virtual addresses, leaving part of the LPA2 functionality untested.
To address this, the series introduces new guest modes for 52-bit VA
operation, adds five-level page table support where required, and
performs runtime detection of host 52-bit VA capability so that
LPA2-enabled guest VA tests are executed only on supported systems.

Testing:

Built and tested on arm64.
Verified on QEMU with a V52-capable guest configuration.
Confirmed correct operation of high virtual address mappings by
exercising guest memory accesses in the 52-bit VA range.

Signed-off-by: Itaru Kitayama <itaru.kitayama@fujitsu.com>
Reviewed-by: Takayuki Okamoto <tokamoto@fujitsu.com>
---
Itaru Kitayama (2):
      KVM: selftest: arm64: Support 5-level paging in stage 1 translation table
      KVM: selftests: arm64: Add 52-bit VA guest modes

 .../selftests/kvm/include/arm64/processor.h        |  2 +
 tools/testing/selftests/kvm/include/kvm_util.h     |  3 +
 tools/testing/selftests/kvm/lib/arm64/processor.c  | 87 ++++++++++++++++++++--
 tools/testing/selftests/kvm/lib/guest_modes.c      |  5 ++
 tools/testing/selftests/kvm/lib/kvm_util.c         | 11 +++
 5 files changed, 103 insertions(+), 5 deletions(-)
---
base-commit: 8d3ae59288f1e7d58d76558a6ee96d533bc5019f
change-id: 20260825-arm64-52bit-va-32f1f4cd050d

Best regards,
--  
Itaru Kitayama <itaru.kitayama@fujitsu.com>