Hi, This series adds asynchronous page fault support for pseries guests and enables the support for the same in powerpc KVM. This is an early RFC with details and multiple TODOs listed in patch descriptions. This patch needs supporting enablement in QEMU too which will be posted separately. Bharata B Rao (5): powerpc: Define Expropriation interrupt bit to VPA byte offset 0xB9 KVM: PPC: Add support for KVM_REQ_ESN_EXIT KVM: PPC: Book3S: Enable setting SRR1 flags for DSI KVM: PPC: BOOK3S HV: Async PF support pseries: Asynchronous page fault support Documentation/virt/kvm/api.rst | 15 ++ arch/powerpc/include/asm/async-pf.h | 12 ++ arch/powerpc/include/asm/hvcall.h | 1 + arch/powerpc/include/asm/kvm_book3s_esn.h | 24 +++ arch/powerpc/include/asm/kvm_host.h | 22 +++ arch/powerpc/include/asm/kvm_ppc.h | 4 +- arch/powerpc/include/asm/lppaca.h | 20 +- arch/powerpc/include/uapi/asm/kvm.h | 6 + arch/powerpc/kvm/Kconfig | 2 + arch/powerpc/kvm/Makefile | 5 +- arch/powerpc/kvm/book3s.c | 6 +- arch/powerpc/kvm/book3s_64_mmu_radix.c | 9 +- arch/powerpc/kvm/book3s_hv.c | 37 +++- arch/powerpc/kvm/book3s_hv_esn.c | 189 +++++++++++++++++++ arch/powerpc/kvm/book3s_hv_nested.c | 4 +- arch/powerpc/kvm/book3s_pr.c | 4 +- arch/powerpc/mm/fault.c | 7 +- arch/powerpc/platforms/pseries/Makefile | 2 +- arch/powerpc/platforms/pseries/async-pf.c | 219 ++++++++++++++++++++++ drivers/cpuidle/cpuidle-pseries.c | 4 +- include/uapi/linux/kvm.h | 2 + tools/include/uapi/linux/kvm.h | 1 + 22 files changed, 574 insertions(+), 21 deletions(-) create mode 100644 arch/powerpc/include/asm/async-pf.h create mode 100644 arch/powerpc/include/asm/kvm_book3s_esn.h create mode 100644 arch/powerpc/kvm/book3s_hv_esn.c create mode 100644 arch/powerpc/platforms/pseries/async-pf.c -- 2.31.1
