Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20201026' into staging

some s390x fixes

# gpg: Signature made Mon 26 Oct 2020 10:46:50 GMT
# gpg:                using RSA key C3D0D66DC3624FF6A8C018CEDECF6B93C6F02FAF
# gpg:                issuer "cohuck@redhat.com"
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>" [unknown]
# gpg:                 aka "Cornelia Huck <huckc@linux.vnet.ibm.com>" [full]
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>" [full]
# gpg:                 aka "Cornelia Huck <cohuck@kernel.org>" [unknown]
# gpg:                 aka "Cornelia Huck <cohuck@redhat.com>" [unknown]
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck/tags/s390x-20201026:
  s390x: pv: Fix diag318 PV fencing
  s390x: pv: Remove sclp boundary checks
  s390x/s390-virtio-ccw: Reset PCI devices during subsystem reset

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

6 files changed, 15 insertions, 7 deletions

diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index e52182f946..2e900335ea 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -101,6 +101,7 @@ static const char *const reset_dev_types[] = {
     "s390-sclp-event-facility",
     "s390-flic",
     "diag288",
+    TYPE_S390_PCI_HOST_BRIDGE,
 };
 
 static void subsystem_reset(void)
diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c
index 00f1e4648d..0cf2290826 100644
--- a/hw/s390x/sclp.c
+++ b/hw/s390x/sclp.c
@@ -285,11 +285,6 @@ int sclp_service_call_protected(CPUS390XState *env, uint64_t sccb,
         goto out_write;
     }
 
-    if (!sccb_verify_boundary(sccb, be16_to_cpu(work_sccb->h.length), code)) {
-        work_sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION);
-        goto out_write;
-    }
-
     sclp_c->execute(sclp, work_sccb, code);
 out_write:
     s390_cpu_pv_mem_write(env_archcpu(env), 0, work_sccb,
diff --git a/target/s390x/cpu_features.c b/target/s390x/cpu_features.c
index 31ea8df246..42fe0bf4ca 100644
--- a/target/s390x/cpu_features.c
+++ b/target/s390x/cpu_features.c
@@ -14,6 +14,7 @@
 #include "qemu/osdep.h"
 #include "qemu/module.h"
 #include "cpu_features.h"
+#include "hw/s390x/pv.h"
 
 #define DEF_FEAT(_FEAT, _NAME, _TYPE, _BIT, _DESC) \
     [S390_FEAT_##_FEAT] = {                        \
@@ -105,6 +106,10 @@ void s390_fill_feat_block(const S390FeatBitmap features, S390FeatType type,
         }
         feat = find_next_bit(features, S390_FEAT_MAX, feat + 1);
     }
+
+    if (type == S390_FEAT_TYPE_SCLP_FAC134 && s390_is_pv()) {
+        clear_be_bit(s390_feat_def(S390_FEAT_DIAG_318)->bit, data);
+    }
 }
 
 void s390_add_from_feat_block(S390FeatBitmap features, S390FeatType type,
diff --git a/target/s390x/cpu_features.h b/target/s390x/cpu_features.h
index ef52ffce83..87463f064d 100644
--- a/target/s390x/cpu_features.h
+++ b/target/s390x/cpu_features.h
@@ -81,6 +81,10 @@ const S390FeatGroupDef *s390_feat_group_def(S390FeatGroup group);
 
 #define BE_BIT_NR(BIT) (BIT ^ (BITS_PER_LONG - 1))
 
+static inline void clear_be_bit(unsigned int bit_nr, uint8_t *array)
+{
+    array[bit_nr / 8] &= ~(0x80 >> (bit_nr % 8));
+}
 static inline void set_be_bit(unsigned int bit_nr, uint8_t *array)
 {
     array[bit_nr / 8] |= 0x80 >> (bit_nr % 8);
diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c
index ca484bfda7..461e0b8f4a 100644
--- a/target/s390x/cpu_models.c
+++ b/target/s390x/cpu_models.c
@@ -29,6 +29,7 @@
 #include "hw/pci/pci.h"
 #endif
 #include "qapi/qapi-commands-machine-target.h"
+#include "hw/s390x/pv.h"
 
 #define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \
     {                                                                    \
@@ -238,6 +239,9 @@ bool s390_has_feat(S390Feat feat)
         }
         return 0;
     }
+    if (feat == S390_FEAT_DIAG_318 && s390_is_pv()) {
+        return false;
+    }
     return test_bit(feat, cpu->model->features);
 }
 
diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
index f13eff688c..baa070fdf7 100644
--- a/target/s390x/kvm.c
+++ b/target/s390x/kvm.c
@@ -2498,8 +2498,7 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
      */
     set_bit(S390_FEAT_EXTENDED_LENGTH_SCCB, model->features);
 
-    /* DIAGNOSE 0x318 is not supported under protected virtualization */
-    if (!s390_is_pv() && kvm_check_extension(kvm_state, KVM_CAP_S390_DIAG318)) {
+    if (kvm_check_extension(kvm_state, KVM_CAP_S390_DIAG318)) {
         set_bit(S390_FEAT_DIAG_318, model->features);
     }