[PATCH v2 0/4] KVM: PPC: Power10 2nd DAWR enablement

[Ravi Bangoria]

Enable p10 2nd DAWR feature for Book3S kvm guest. DAWR is a hypervisor
resource and thus H_SET_MODE hcall is used to set/unset it. A new case
H_SET_MODE_RESOURCE_SET_DAWR1 is introduced in H_SET_MODE hcall for
setting/unsetting 2nd DAWR. Also, new capability KVM_CAP_PPC_DAWR1 has
been added to query 2nd DAWR support via kvm ioctl.

This feature also needs to be enabled in Qemu to really use it. I'll
post Qemu patches once kvm patches get accepted.

v1: https://lore.kernel.org/r/20200723102058.312282-1-ravi.bangoria@linux.ibm.com

v1->v2:
 - patch #1: New patch
 - patch #2: Don't rename KVM_REG_PPC_DAWR, it's an uapi macro
 - patch #3: Increment HV_GUEST_STATE_VERSION
 - Split kvm and selftests patches into different series
 - Patches rebased to paulus/kvm-ppc-next (cf59eb13e151) + few
   other watchpoint patches which are yet to be merged in
   paulus/kvm-ppc-next.

Ravi Bangoria (4):
  KVM: PPC: Allow nested guest creation when L0 hv_guest_state > L1
  KVM: PPC: Rename current DAWR macros and variables
  KVM: PPC: Add infrastructure to support 2nd DAWR
  KVM: PPC: Introduce new capability for 2nd DAWR

 Documentation/virt/kvm/api.rst            |  2 +
 arch/powerpc/include/asm/hvcall.h         | 25 ++++++++-
 arch/powerpc/include/asm/kvm_host.h       |  6 +-
 arch/powerpc/include/uapi/asm/kvm.h       |  2 +
 arch/powerpc/kernel/asm-offsets.c         |  6 +-
 arch/powerpc/kvm/book3s_hv.c              | 65 ++++++++++++++++++----
 arch/powerpc/kvm/book3s_hv_nested.c       | 68 ++++++++++++++++++-----
 arch/powerpc/kvm/book3s_hv_rmhandlers.S   | 43 ++++++++++----
 arch/powerpc/kvm/powerpc.c                |  3 +
 include/uapi/linux/kvm.h                  |  1 +
 tools/arch/powerpc/include/uapi/asm/kvm.h |  2 +
 11 files changed, 181 insertions(+), 42 deletions(-)

-- 
2.26.2