Re: [PATCH v2 29/30] KVM: s390: introduce CPU feature for zPCI Interpretation

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 





On 1/14/22 21:31, Matthew Rosato wrote:
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@xxxxxxxxxxxxx>
---
  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);
+

Don't we want to start the support of ZPCI interpretation starting with Z14 ?

  	if (MACHINE_HAS_ESOP)
  		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
  	/*


--
Pierre Morel
IBM Lab Boeblingen



[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Kernel Development]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite Info]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Linux Media]     [Device Mapper]

  Powered by Linux