Messages in this thread Patch in this message | | | From | Matthew Rosato <> | Subject | [PATCH v2 29/30] KVM: s390: introduce CPU feature for zPCI Interpretation | Date | Fri, 14 Jan 2022 15:31:44 -0500 |
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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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