[qemu-s390x] [PATCH v8 2/6] s390x/cpumodel: Set up CPU model for AP device support

[Tony Krowiak]

A new CPU model feature and two new CPU model facilities are
introduced to support AP devices for a KVM guest.

CPU model features:

1. The KVM_S390_VM_CPU_FEAT_AP CPU model feature indicates that
   AP facilities are installed. This feature will be enabled by
   the kernel only if the AP facilities are installed on the linux
   host. This feature must be turned on from userspace to access
   AP devices from the KVM guest. The QEMU command line to turn
   this feature looks something like this:

        qemu-system-s390x ... -cpu xxx,ap=on

   This feature will be supported for zEC12 and newer CPU models.
   The feature will not be supported for older models due to
   testability issues.

CPU model facilities:

1. The S390_FEAT_AP_QUERY_CONFIG_INFO feature indicates the AP Query
   Configuration Information (QCI) facility is installed. This feature
   will be enabled by the kernel only if the QCI is installed on
   the host.

2. The S390_FEAT_AP_FACILITY_TEST feature indicates that the AP
   Facility Test (APFT) facility is installed. This feature will
   be enabled by the kernel only if the APFT facility is installed
   on the host.

Signed-off-by: Tony Krowiak <address@hidden>
---
 target/s390x/cpu_features.c     |    3 +++
 target/s390x/cpu_features_def.h |    3 +++
 target/s390x/cpu_models.c       |    2 ++
 target/s390x/gen-features.c     |    3 +++
 target/s390x/kvm.c              |    1 +
 5 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/target/s390x/cpu_features.c b/target/s390x/cpu_features.c
index 172fb18..60cfeba 100644
--- a/target/s390x/cpu_features.c
+++ b/target/s390x/cpu_features.c
@@ -39,8 +39,10 @@ static const S390FeatDef s390_features[] = {
     FEAT_INIT("srs", S390_FEAT_TYPE_STFL, 9, "Sense-running-status facility"),
     FEAT_INIT("csske", S390_FEAT_TYPE_STFL, 10, "Conditional-SSKE facility"),
     FEAT_INIT("ctop", S390_FEAT_TYPE_STFL, 11, "Configuration-topology 
facility"),
+    FEAT_INIT("apqci", S390_FEAT_TYPE_STFL, 12, "Query AP Configuration 
Information facility"),
     FEAT_INIT("ipter", S390_FEAT_TYPE_STFL, 13, "IPTE-range facility"),
     FEAT_INIT("nonqks", S390_FEAT_TYPE_STFL, 14, "Nonquiescing key-setting 
facility"),
+    FEAT_INIT("apft", S390_FEAT_TYPE_STFL, 15, "AP Facilities Test facility"),
     FEAT_INIT("etf2", S390_FEAT_TYPE_STFL, 16, "Extended-translation facility 
2"),
     FEAT_INIT("msa-base", S390_FEAT_TYPE_STFL, 17, "Message-security-assist 
facility (excluding subfunctions)"),
     FEAT_INIT("ldisp", S390_FEAT_TYPE_STFL, 18, "Long-displacement facility"),
@@ -129,6 +131,7 @@ static const S390FeatDef s390_features[] = {
 
     FEAT_INIT_MISC("dateh2", "DAT-enhancement facility 2"),
     FEAT_INIT_MISC("cmm", "Collaborative-memory-management facility"),
+    FEAT_INIT_MISC("ap", "AP instructions installed"),
 
     FEAT_INIT("plo-cl", S390_FEAT_TYPE_PLO, 0, "PLO Compare and load (32 bit 
in general registers)"),
     FEAT_INIT("plo-clg", S390_FEAT_TYPE_PLO, 1, "PLO Compare and load (64 bit 
in parameter list)"),
diff --git a/target/s390x/cpu_features_def.h b/target/s390x/cpu_features_def.h
index ac2c947..5fc7e7b 100644
--- a/target/s390x/cpu_features_def.h
+++ b/target/s390x/cpu_features_def.h
@@ -27,8 +27,10 @@ typedef enum {
     S390_FEAT_SENSE_RUNNING_STATUS,
     S390_FEAT_CONDITIONAL_SSKE,
     S390_FEAT_CONFIGURATION_TOPOLOGY,
+    S390_FEAT_AP_QUERY_CONFIG_INFO,
     S390_FEAT_IPTE_RANGE,
     S390_FEAT_NONQ_KEY_SETTING,
+    S390_FEAT_AP_FACILITIES_TEST,
     S390_FEAT_EXTENDED_TRANSLATION_2,
     S390_FEAT_MSA,
     S390_FEAT_LONG_DISPLACEMENT,
@@ -119,6 +121,7 @@ typedef enum {
     /* Misc */
     S390_FEAT_DAT_ENH_2,
     S390_FEAT_CMM,
+    S390_FEAT_AP,
 
     /* PLO */
     S390_FEAT_PLO_CL,
diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c
index 265d25c..7c253ff 100644
--- a/target/s390x/cpu_models.c
+++ b/target/s390x/cpu_models.c
@@ -786,6 +786,8 @@ static void check_consistency(const S390CPUModel *model)
         { S390_FEAT_PRNO_TRNG_QRTCR, S390_FEAT_MSA_EXT_5 },
         { S390_FEAT_PRNO_TRNG, S390_FEAT_MSA_EXT_5 },
         { S390_FEAT_SIE_KSS, S390_FEAT_SIE_F2 },
+        { S390_FEAT_AP_QUERY_CONFIG_INFO, S390_FEAT_AP },
+        { S390_FEAT_AP_FACILITIES_TEST, S390_FEAT_AP },
     };
     int i;
 
diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c
index 384b61c..70015ea 100644
--- a/target/s390x/gen-features.c
+++ b/target/s390x/gen-features.c
@@ -447,6 +447,9 @@ static uint16_t full_GEN12_GA1[] = {
     S390_FEAT_ADAPTER_INT_SUPPRESSION,
     S390_FEAT_EDAT_2,
     S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2,
+    S390_FEAT_AP_QUERY_CONFIG_INFO,
+    S390_FEAT_AP_FACILITIES_TEST,
+    S390_FEAT_AP,
 };
 
 static uint16_t full_GEN12_GA2[] = {
diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
index 348e8cc..c4bd84d 100644
--- a/target/s390x/kvm.c
+++ b/target/s390x/kvm.c
@@ -2134,6 +2134,7 @@ static int kvm_to_feat[][2] = {
     { KVM_S390_VM_CPU_FEAT_PFMFI, S390_FEAT_SIE_PFMFI},
     { KVM_S390_VM_CPU_FEAT_SIGPIF, S390_FEAT_SIE_SIGPIF},
     { KVM_S390_VM_CPU_FEAT_KSS, S390_FEAT_SIE_KSS},
+    { KVM_S390_VM_CPU_FEAT_AP, S390_FEAT_AP},
 };
 
 static int query_cpu_feat(S390FeatBitmap features)
-- 
1.7.1