Re: [PATCH v3 29/30] KVM: s390: introduce CPU feature for zPCI Interpretation

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

 





On 2/4/22 22:15, 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>

Reviewed-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>



---
  arch/s390/include/uapi/asm/kvm.h | 1 +
  arch/s390/kvm/kvm-s390.c         | 5 +++++
  2 files changed, 6 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 208b09d08385..e20d9ac1935d 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -434,6 +434,11 @@ static void kvm_s390_cpu_feat_init(void)
  	if (test_facility(151)) /* DFLTCC */
  		__insn32_query(INSN_DFLTCC, kvm_s390_available_subfunc.dfltcc);
+ /* zPCI Interpretation */
+	if (IS_ENABLED(CONFIG_VFIO_PCI_ZDEV) && test_facility(69) &&
+	    test_facility(70) && test_facility(71) && test_facility(72))
+		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ZPCI_INTERP);
+
  	if (MACHINE_HAS_ESOP)
  		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
  	/*


--
Pierre Morel
IBM Lab Boeblingen



[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux