Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20181012' into staging

More s390x updates:
- introduce support for vfio-ap (s390 crypto devices), including a
  Linux headers update to get the new interfaces
- the usual fixing + cleanup

# gpg: Signature made Fri 12 Oct 2018 10:54:38 BST
# gpg:                using RSA key DECF6B93C6F02FAF
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>"
# gpg:                 aka "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>"
# gpg:                 aka "Cornelia Huck <cohuck@kernel.org>"
# gpg:                 aka "Cornelia Huck <cohuck@redhat.com>"
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck/tags/s390x-20181012:
  hw/s390x: Include the tod-qemu also for builds with --disable-tcg
  s390: doc: detailed specifications for AP virtualization
  s390x/vfio: ap: Introduce VFIO AP device
  s390x/ap: base Adjunct Processor (AP) object model
  s390x/kvm: enable AP instruction interpretation for guest
  s390x/cpumodel: Set up CPU model for AP device support
  linux-headers: update
  target/s390x/excp_helper: Remove DPRINTF() macro

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

6 files changed, 305 insertions, 1 deletions

diff --git a/hw/s390x/Makefile.objs b/hw/s390x/Makefile.objs
index 5dbc00ce9b..ca68806e44 100644
--- a/hw/s390x/Makefile.objs
+++ b/hw/s390x/Makefile.objs
@@ -26,8 +26,10 @@ obj-$(call lnot,$(CONFIG_PCI)) += s390-pci-stub.o
 obj-y += s390-skeys.o
 obj-y += s390-stattrib.o
 obj-y += tod.o
+obj-y += tod-qemu.o
 obj-$(CONFIG_KVM) += tod-kvm.o
-obj-$(CONFIG_TCG) += tod-qemu.o
 obj-$(CONFIG_KVM) += s390-skeys-kvm.o
 obj-$(CONFIG_KVM) += s390-stattrib-kvm.o
 obj-y += s390-ccw.o
+obj-y += ap-device.o
+obj-y += ap-bridge.o
diff --git a/hw/s390x/ap-bridge.c b/hw/s390x/ap-bridge.c
new file mode 100644
index 0000000000..3795d30dd7
--- /dev/null
+++ b/hw/s390x/ap-bridge.c
@@ -0,0 +1,78 @@
+/*
+ * ap bridge
+ *
+ * Copyright 2018 IBM Corp.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/sysbus.h"
+#include "qemu/bitops.h"
+#include "hw/s390x/ap-bridge.h"
+#include "cpu.h"
+
+static char *ap_bus_get_dev_path(DeviceState *dev)
+{
+    /* at most one */
+    return g_strdup_printf("/1");
+}
+
+static void ap_bus_class_init(ObjectClass *oc, void *data)
+{
+    BusClass *k = BUS_CLASS(oc);
+
+    k->get_dev_path = ap_bus_get_dev_path;
+    /* More than one ap device does not make sense */
+    k->max_dev = 1;
+}
+
+static const TypeInfo ap_bus_info = {
+    .name = TYPE_AP_BUS,
+    .parent = TYPE_BUS,
+    .instance_size = 0,
+    .class_init = ap_bus_class_init,
+};
+
+void s390_init_ap(void)
+{
+    DeviceState *dev;
+
+    /* If no AP instructions then no need for AP bridge */
+    if (!s390_has_feat(S390_FEAT_AP)) {
+        return;
+    }
+
+    /* Create bridge device */
+    dev = qdev_create(NULL, TYPE_AP_BRIDGE);
+    object_property_add_child(qdev_get_machine(), TYPE_AP_BRIDGE,
+                              OBJECT(dev), NULL);
+    qdev_init_nofail(dev);
+
+    /* Create bus on bridge device */
+    qbus_create(TYPE_AP_BUS, dev, TYPE_AP_BUS);
+ }
+
+static void ap_bridge_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
+}
+
+static const TypeInfo ap_bridge_info = {
+    .name          = TYPE_AP_BRIDGE,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = 0,
+    .class_init    = ap_bridge_class_init,
+};
+
+static void ap_register(void)
+{
+    type_register_static(&ap_bridge_info);
+    type_register_static(&ap_bus_info);
+}
+
+type_init(ap_register)
diff --git a/hw/s390x/ap-device.c b/hw/s390x/ap-device.c
new file mode 100644
index 0000000000..f5ac8db968
--- /dev/null
+++ b/hw/s390x/ap-device.c
@@ -0,0 +1,38 @@
+/*
+ * Adjunct Processor (AP) matrix device
+ *
+ * Copyright 2018 IBM Corp.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+#include "qemu/osdep.h"
+#include "qemu/module.h"
+#include "qapi/error.h"
+#include "hw/qdev.h"
+#include "hw/s390x/ap-device.h"
+
+static void ap_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->desc = "AP device class";
+    dc->hotpluggable = false;
+}
+
+static const TypeInfo ap_device_info = {
+    .name = AP_DEVICE_TYPE,
+    .parent = TYPE_DEVICE,
+    .instance_size = sizeof(APDevice),
+    .class_size = sizeof(DeviceClass),
+    .class_init = ap_class_init,
+    .abstract = true,
+};
+
+static void ap_device_register(void)
+{
+    type_register_static(&ap_device_info);
+}
+
+type_init(ap_device_register)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 53fd7c975f..a0615a8b35 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -32,6 +32,7 @@
 #include "ipl.h"
 #include "hw/s390x/s390-virtio-ccw.h"
 #include "hw/s390x/css-bridge.h"
+#include "hw/s390x/ap-bridge.h"
 #include "migration/register.h"
 #include "cpu_models.h"
 #include "hw/nmi.h"
@@ -263,6 +264,9 @@ static void ccw_init(MachineState *machine)
     /* init the SIGP facility */
     s390_init_sigp();
 
+    /* create AP bridge and bus(es) */
+    s390_init_ap();
+
     /* get a BUS */
     css_bus = virtual_css_bus_init();
     s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
diff --git a/hw/vfio/Makefile.objs b/hw/vfio/Makefile.objs
index a2e7a0a7cf..8b3f664d85 100644
--- a/hw/vfio/Makefile.objs
+++ b/hw/vfio/Makefile.objs
@@ -6,4 +6,5 @@ obj-$(CONFIG_SOFTMMU) += platform.o
 obj-$(CONFIG_VFIO_XGMAC) += calxeda-xgmac.o
 obj-$(CONFIG_VFIO_AMD_XGBE) += amd-xgbe.o
 obj-$(CONFIG_SOFTMMU) += spapr.o
+obj-$(CONFIG_VFIO_AP) += ap.o
 endif
diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c
new file mode 100644
index 0000000000..3962bb74e5
--- /dev/null
+++ b/hw/vfio/ap.c
@@ -0,0 +1,181 @@
+/*
+ * VFIO based AP matrix device assignment
+ *
+ * Copyright 2018 IBM Corp.
+ * Author(s): Tony Krowiak <akrowiak@linux.ibm.com>
+ *            Halil Pasic <pasic@linux.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include <linux/vfio.h>
+#include <sys/ioctl.h>
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/sysbus.h"
+#include "hw/vfio/vfio.h"
+#include "hw/vfio/vfio-common.h"
+#include "hw/s390x/ap-device.h"
+#include "qemu/error-report.h"
+#include "qemu/queue.h"
+#include "qemu/option.h"
+#include "qemu/config-file.h"
+#include "cpu.h"
+#include "kvm_s390x.h"
+#include "sysemu/sysemu.h"
+#include "hw/s390x/ap-bridge.h"
+#include "exec/address-spaces.h"
+
+#define VFIO_AP_DEVICE_TYPE      "vfio-ap"
+
+typedef struct VFIOAPDevice {
+    APDevice apdev;
+    VFIODevice vdev;
+} VFIOAPDevice;
+
+#define VFIO_AP_DEVICE(obj) \
+        OBJECT_CHECK(VFIOAPDevice, (obj), VFIO_AP_DEVICE_TYPE)
+
+static void vfio_ap_compute_needs_reset(VFIODevice *vdev)
+{
+    vdev->needs_reset = false;
+}
+
+/*
+ * We don't need vfio_hot_reset_multi and vfio_eoi operations for
+ * vfio-ap device now.
+ */
+struct VFIODeviceOps vfio_ap_ops = {
+    .vfio_compute_needs_reset = vfio_ap_compute_needs_reset,
+};
+
+static void vfio_ap_put_device(VFIOAPDevice *vapdev)
+{
+    g_free(vapdev->vdev.name);
+    vfio_put_base_device(&vapdev->vdev);
+}
+
+static VFIOGroup *vfio_ap_get_group(VFIOAPDevice *vapdev, Error **errp)
+{
+    GError *gerror = NULL;
+    char *symlink, *group_path;
+    int groupid;
+
+    symlink = g_strdup_printf("%s/iommu_group", vapdev->vdev.sysfsdev);
+    group_path = g_file_read_link(symlink, &gerror);
+    g_free(symlink);
+
+    if (!group_path) {
+        error_setg(errp, "%s: no iommu_group found for %s: %s",
+                   VFIO_AP_DEVICE_TYPE, vapdev->vdev.sysfsdev, gerror->message);
+        return NULL;
+    }
+
+    if (sscanf(basename(group_path), "%d", &groupid) != 1) {
+        error_setg(errp, "vfio: failed to read %s", group_path);
+        g_free(group_path);
+        return NULL;
+    }
+
+    g_free(group_path);
+
+    return vfio_get_group(groupid, &address_space_memory, errp);
+}
+
+static void vfio_ap_realize(DeviceState *dev, Error **errp)
+{
+    int ret;
+    char *mdevid;
+    Error *local_err = NULL;
+    VFIOGroup *vfio_group;
+    APDevice *apdev = AP_DEVICE(dev);
+    VFIOAPDevice *vapdev = VFIO_AP_DEVICE(apdev);
+
+    vfio_group = vfio_ap_get_group(vapdev, &local_err);
+    if (!vfio_group) {
+        goto out_err;
+    }
+
+    vapdev->vdev.ops = &vfio_ap_ops;
+    vapdev->vdev.type = VFIO_DEVICE_TYPE_AP;
+    mdevid = basename(vapdev->vdev.sysfsdev);
+    vapdev->vdev.name = g_strdup_printf("%s", mdevid);
+    vapdev->vdev.dev = dev;
+
+    ret = vfio_get_device(vfio_group, mdevid, &vapdev->vdev, &local_err);
+    if (ret) {
+        goto out_get_dev_err;
+    }
+
+    return;
+
+out_get_dev_err:
+    vfio_ap_put_device(vapdev);
+    vfio_put_group(vfio_group);
+out_err:
+    error_propagate(errp, local_err);
+}
+
+static void vfio_ap_unrealize(DeviceState *dev, Error **errp)
+{
+    APDevice *apdev = AP_DEVICE(dev);
+    VFIOAPDevice *vapdev = VFIO_AP_DEVICE(apdev);
+    VFIOGroup *group = vapdev->vdev.group;
+
+    vfio_ap_put_device(vapdev);
+    vfio_put_group(group);
+}
+
+static Property vfio_ap_properties[] = {
+    DEFINE_PROP_STRING("sysfsdev", VFIOAPDevice, vdev.sysfsdev),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void vfio_ap_reset(DeviceState *dev)
+{
+    int ret;
+    APDevice *apdev = AP_DEVICE(dev);
+    VFIOAPDevice *vapdev = VFIO_AP_DEVICE(apdev);
+
+    ret = ioctl(vapdev->vdev.fd, VFIO_DEVICE_RESET);
+    if (ret) {
+        error_report("%s: failed to reset %s device: %s", __func__,
+                     vapdev->vdev.name, strerror(ret));
+    }
+}
+
+static const VMStateDescription vfio_ap_vmstate = {
+    .name = VFIO_AP_DEVICE_TYPE,
+    .unmigratable = 1,
+};
+
+static void vfio_ap_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->props = vfio_ap_properties;
+    dc->vmsd = &vfio_ap_vmstate;
+    dc->desc = "VFIO-based AP device assignment";
+    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+    dc->realize = vfio_ap_realize;
+    dc->unrealize = vfio_ap_unrealize;
+    dc->hotpluggable = false;
+    dc->reset = vfio_ap_reset;
+    dc->bus_type = TYPE_AP_BUS;
+}
+
+static const TypeInfo vfio_ap_info = {
+    .name = VFIO_AP_DEVICE_TYPE,
+    .parent = AP_DEVICE_TYPE,
+    .instance_size = sizeof(VFIOAPDevice),
+    .class_init = vfio_ap_class_init,
+};
+
+static void vfio_ap_type_init(void)
+{
+    type_register_static(&vfio_ap_info);
+}
+
+type_init(vfio_ap_type_init)