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    Subject[PATCH v2 29/30] KVM: s390: introduce CPU feature for zPCI Interpretation
    Date
    KVM_S390_VM_CPU_FEAT_ZPCI_INTERP relays whether zPCI interpretive
    execution is possible based on the available hardware facilities.

    Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
    ---
    arch/s390/include/uapi/asm/kvm.h | 1 +
    arch/s390/kvm/kvm-s390.c | 4 ++++
    2 files changed, 5 insertions(+)

    diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h
    index 7a6b14874d65..ed06458a871f 100644
    --- a/arch/s390/include/uapi/asm/kvm.h
    +++ b/arch/s390/include/uapi/asm/kvm.h
    @@ -130,6 +130,7 @@ struct kvm_s390_vm_cpu_machine {
    #define KVM_S390_VM_CPU_FEAT_PFMFI 11
    #define KVM_S390_VM_CPU_FEAT_SIGPIF 12
    #define KVM_S390_VM_CPU_FEAT_KSS 13
    +#define KVM_S390_VM_CPU_FEAT_ZPCI_INTERP 14
    struct kvm_s390_vm_cpu_feat {
    __u64 feat[16];
    };
    diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
    index b6c32fc3b272..3ed59fe512dd 100644
    --- a/arch/s390/kvm/kvm-s390.c
    +++ b/arch/s390/kvm/kvm-s390.c
    @@ -434,6 +434,10 @@ static void kvm_s390_cpu_feat_init(void)
    if (test_facility(151)) /* DFLTCC */
    __insn32_query(INSN_DFLTCC, kvm_s390_available_subfunc.dfltcc);

    + if (test_facility(69) && test_facility(70) && test_facility(71) &&
    + test_facility(72)) /* zPCI Interpretation */
    + allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ZPCI_INTERP);
    +
    if (MACHINE_HAS_ESOP)
    allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
    /*
    --
    2.27.0
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