linux-kernel - [PATCH v2 0/8] KVM: PPC: Book3S HV: Nested guest migration fixes

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Date: Wed, 05 Jun 2024 13:06:00 +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 v2 0/8] 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.

The remaining patches take care of save-restoring the guest
state elements for DEXCR, HASHKEYR and HASHPKEYR SPRs with PHYP
during entry-exit. The KVM_PPC_REG too for them are missing which
are added for use by the QEMU.

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

---

Changelog:
v1: https://lore.kernel.org/kvm/171741555734.11675.17428208097186191736.stgit@c0c876608f2d/
 - Reordered the patches in a way to introduce the SPRs first as
   suggested.
 - Added Reviewed-bys to the reviewed ones.
 - Added 2 more patches to handle the hashpkeyr state

Shivaprasad G Bhat (8):
      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: Add one-reg interface for DEXCR register
      KVM: PPC: Book3S HV nestedv2: Keep nested guest DEXCR in sync
      KVM: PPC: Book3S HV: Add one-reg interface for HASHKEYR register
      KVM: PPC: Book3S HV nestedv2: Keep nested guest HASHKEYR in sync
      KVM: PPC: Book3S HV: Add one-reg interface for HASHPKEYR register
      KVM: PPC: Book3S HV nestedv2: Keep nested guest HASHPKEYR in sync


 Documentation/virt/kvm/api.rst        |  3 +++
 arch/powerpc/include/asm/kvm_host.h   |  3 +++
 arch/powerpc/include/uapi/asm/kvm.h   |  3 +++
 arch/powerpc/kvm/book3s_hv.c          | 22 ++++++++++++++++++++--
 arch/powerpc/kvm/book3s_hv.h          |  3 +++
 arch/powerpc/kvm/book3s_hv_nestedv2.c | 18 ++++++++++++++++++
 6 files changed, 50 insertions(+), 2 deletions(-)

--
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