[Qemu-devel] [PATCH v2 2/2] s390x/cpumodel: allow zpci features in qemu model

[Cornelia Huck]

AEN can be provided unconditionally, ZPCI should be turned on
manually.

With -cpu qemu,zpci=on, a 4.15 guest kernel can now successfully
detect virtio-pci devices under tcg.

Signed-off-by: Cornelia Huck <address@hidden>
---
 target/s390x/cpu_models.c   | 6 ++++++
 target/s390x/gen-features.c | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c
index 212a5f0697..250d931d7e 100644
--- a/target/s390x/cpu_models.c
+++ b/target/s390x/cpu_models.c
@@ -23,6 +23,7 @@
 #include "qapi/qmp/qbool.h"
 #ifndef CONFIG_USER_ONLY
 #include "sysemu/arch_init.h"
+#include "hw/pci/pci.h"
 #endif
 
 #define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \
@@ -1271,6 +1272,11 @@ static void register_types(void)
 
     /* init all bitmaps from gnerated data initially */
     s390_init_feat_bitmap(qemu_max_cpu_feat_init, qemu_max_cpu_feat);
+#ifndef CONFIG_USER_ONLY
+    if (!pci_available) {
+        clear_bit(S390_FEAT_ZPCI, qemu_max_cpu_feat);
+    }
+#endif
     for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
         s390_init_feat_bitmap(s390_cpu_defs[i].base_init,
                               s390_cpu_defs[i].base_feat);
diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c
index 0570f597ec..c7083ed4a8 100644
--- a/target/s390x/gen-features.c
+++ b/target/s390x/gen-features.c
@@ -574,6 +574,7 @@ static uint16_t qemu_LATEST[] = {
     S390_FEAT_INTERLOCKED_ACCESS_2,
     S390_FEAT_MSA_EXT_4,
     S390_FEAT_MSA_EXT_3,
+    S390_FEAT_ADAPTER_EVENT_NOTIFICATION,
 };
 
 /* add all new definitions before this point */
@@ -582,6 +583,8 @@ static uint16_t qemu_MAX[] = {
     S390_FEAT_STFLE_53,
     /* generates a dependency warning, leave it out for now */
     S390_FEAT_MSA_EXT_5,
+    /* only with CONFIG_PCI */
+    S390_FEAT_ZPCI,
 };
 
 /****** END FEATURE DEFS ******/
-- 
2.13.6