Revert "s390x/s390-virtio-ccw: add zpcii-disable machine property"

This reverts commit 59d1ce4439.

The "zpcii-disable" machine property is redundant with the "interpret"
zPCI device property. Remove it for clarification.

Signed-off-by: Cédric Le Goater <clg@redhat.com>
Message-Id: <20221107161349.1032730-2-clg@kaod.org>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/s390x/s390-pci-kvm.c

@@ -22,9 +22,7 @@
 
 bool s390_pci_kvm_interp_allowed(void)
 {
-    return (kvm_s390_get_zpci_op() && !s390_is_pv() &&
+    return kvm_s390_get_zpci_op() && !s390_is_pv();
-            !object_property_get_bool(OBJECT(qdev_get_machine()),
-                                      "zpcii-disable", NULL));
 }
 
 int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib, bool assist)

hw/s390x/s390-virtio-ccw.c

@@ -627,21 +627,6 @@ static inline void machine_set_dea_key_wrap(Object *obj, bool value,
     ms->dea_key_wrap = value;
 }
 
-static inline bool machine_get_zpcii_disable(Object *obj, Error **errp)
-{
-    S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
-
-    return ms->zpcii_disable;
-}
-
-static inline void machine_set_zpcii_disable(Object *obj, bool value,
-                                             Error **errp)
-{
-    S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
-
-    ms->zpcii_disable = value;
-}
-
 static S390CcwMachineClass *current_mc;
 
 /*
@@ -778,12 +763,6 @@ static void ccw_machine_class_init(ObjectClass *oc, void *data)
             "Up to 8 chars in set of [A-Za-z0-9. ] (lower case chars converted"
             " to upper case) to pass to machine loader, boot manager,"
             " and guest kernel");
-
-    object_class_property_add_bool(oc, "zpcii-disable",
-                                   machine_get_zpcii_disable,
-                                   machine_set_zpcii_disable);
-    object_class_property_set_description(oc, "zpcii-disable",
-            "disable zPCI interpretation facilties");
 }
 
 static inline void s390_machine_initfn(Object *obj)
@@ -792,7 +771,6 @@ static inline void s390_machine_initfn(Object *obj)
 
     ms->aes_key_wrap = true;
     ms->dea_key_wrap = true;
-    ms->zpcii_disable = false;
 }
 
 static const TypeInfo ccw_machine_info = {
@@ -857,12 +835,10 @@ DEFINE_CCW_MACHINE(7_2, "7.2", true);
 static void ccw_machine_7_1_instance_options(MachineState *machine)
 {
     static const S390FeatInit qemu_cpu_feat = { S390_FEAT_LIST_QEMU_V7_1 };
-    S390CcwMachineState *ms = S390_CCW_MACHINE(machine);
 
     ccw_machine_7_2_instance_options(machine);
     s390_cpudef_featoff_greater(16, 1, S390_FEAT_PAIE);
     s390_set_qemu_cpu_model(0x8561, 15, 1, qemu_cpu_feat);
-    ms->zpcii_disable = true;
 }
 
 static void ccw_machine_7_1_class_options(MachineClass *mc)

include/hw/s390x/s390-virtio-ccw.h

@@ -27,7 +27,6 @@ struct S390CcwMachineState {
     bool aes_key_wrap;
     bool dea_key_wrap;
     bool pv;
-    bool zpcii_disable;
     uint8_t loadparm[8];
 };
 

qemu-options.hx

@@ -37,8 +37,7 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \
     "                memory-encryption=@var{} memory encryption object to use (default=none)\n"
     "                hmat=on|off controls ACPI HMAT support (default=off)\n"
     "                memory-backend='backend-id' specifies explicitly provided backend for main RAM (default=none)\n"
-    "                cxl-fmw.0.targets.0=firsttarget,cxl-fmw.0.targets.1=secondtarget,cxl-fmw.0.size=size[,cxl-fmw.0.interleave-granularity=granularity]\n"
+    "                cxl-fmw.0.targets.0=firsttarget,cxl-fmw.0.targets.1=secondtarget,cxl-fmw.0.size=size[,cxl-fmw.0.interleave-granularity=granularity]\n",
-    "                zpcii-disable=on|off disables zPCI interpretation facilities (default=off)\n",
     QEMU_ARCH_ALL)
 SRST
 ``-machine [type=]name[,prop=value[,...]]``
@@ -158,11 +157,6 @@ SRST
         ::
 
             -machine cxl-fmw.0.targets.0=cxl.0,cxl-fmw.0.targets.1=cxl.1,cxl-fmw.0.size=128G,cxl-fmw.0.interleave-granularity=512k
-
-    ``zpcii-disable=on|off``
-        Disables zPCI interpretation facilties on s390-ccw hosts.
-        This feature can be used to disable hardware virtual assists
-        related to zPCI devices. The default is off.
 ERST
 
 DEF("M", HAS_ARG, QEMU_OPTION_M,

util/qemu-config.c

@@ -236,10 +236,6 @@ static QemuOptsList machine_opts = {
             .help = "Up to 8 chars in set of [A-Za-z0-9. ](lower case chars"
                     " converted to upper case) to pass to machine"
                     " loader, boot manager, and guest kernel",
-        },{
-            .name = "zpcii-disable",
-            .type = QEMU_OPT_BOOL,
-            .help = "disable zPCI interpretation facilities",
         },
         { /* End of list */ }
     }