linux-kernel - [PATCH 0/6] KVM: PPC: Book3S HV: Nested guest migration fixes

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Date: Mon, 03 Jun 2024 11:13:55 +0000
From: Shivaprasad G Bhat <sbhat@...ux.ibm.com>
To: kvm@...r.kernel.org, linux-doc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Cc: pbonzini@...hat.com, naveen.n.rao@...ux.ibm.com,
        christophe.leroy@...roup.eu, corbet@....net, mpe@...erman.id.au,
        namhyung@...nel.org, npiggin@...il.com, pbonzini@...hat.com,
        sbhat@...ux.ibm.com, jniethe5@...il.com, atrajeev@...ux.vnet.ibm.com,
        linux-kernel@...r.kernel.org
Subject: [PATCH 0/6] KVM: PPC: Book3S HV: Nested guest migration fixes

The series fixes the issues exposed by the kvm-unit-tests[1]
sprs-migration test.

The SDAR, MMCR3 were seen to have some typo/refactoring bugs.
The first two patches fix them.

Though the nestedv2 APIs defined the guest state elements for
Power ISA 3.1B SPRs to save-restore with PHYP during entry-exit,
the DEXCR and HASHKEYR were ignored in code. The KVM_PPC_REG too
for them are missing without which the Qemu is not setting them
to their 'previous' value during guest migration at destination.
The remaining patches take care of this.

References:
[1]: https://github.com/kvm-unit-tests/kvm-unit-tests

---

Shivaprasad G Bhat (6):
      KVM: PPC: Book3S HV: Fix the set_one_reg for MMCR3
      KVM: PPC: Book3S HV: Fix the get_one_reg of SDAR
      KVM: PPC: Book3S HV nestedv2: Keep nested guest DEXCR in sync
      KVM: PPC: Book3S HV: Add one-reg interface for DEXCR register
      KVM: PPC: Book3S HV nestedv2: Keep nested guest HASHKEYR in sync
      KVM: PPC: Book3S HV: Add one-reg interface for HASHKEYR register


 Documentation/virt/kvm/api.rst            |  2 ++
 arch/powerpc/include/asm/kvm_host.h       |  2 ++
 arch/powerpc/include/uapi/asm/kvm.h       |  2 ++
 arch/powerpc/kvm/book3s_hv.c              | 16 ++++++++++++++--
 arch/powerpc/kvm/book3s_hv.h              |  2 ++
 arch/powerpc/kvm/book3s_hv_nestedv2.c     | 12 ++++++++++++
 tools/arch/powerpc/include/uapi/asm/kvm.h |  2 ++
 7 files changed, 36 insertions(+), 2 deletions(-)

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