qemu-kvm/kvm-hw-s390x-Restrict-loadparm-property-to-devices-that-.patch

From ffffba85b269096d25fef307b342b8f576610d34 Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Wed, 13 Nov 2024 12:47:41 +0100
Subject: [PATCH 04/10] hw/s390x: Restrict "loadparm" property to devices that
 can be used for booting
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RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 298: [c9s] Fixes for the new s390x "boot order" feature
RH-Jira: RHEL-68440
RH-Acked-by: Cédric Le Goater <clg@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [3/8] e381997b44f5b8c80a90ae99f5ae5d863f6d5aa5 (thuth/qemu-kvm-cs9)

Commit bb185de423 ("s390x: Add individual loadparm assignment to
CCW device") added a "loadparm" property to all CCW devices. This
was a little bit unfortunate, since this property is only useful
for devices that can be used for booting, but certainly it is not
useful for devices like virtio-gpu or virtio-tablet.

Thus let's restrict the property to CCW devices that we can boot from
(i.e. virtio-block, virtio-net and vfio-ccw devices).

Message-ID: <20241113114741.681096-1-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Jared Rossi <jrossi@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 6e7c96ae61e0542e97d385084f1f2281a0331054)
---
 hw/s390x/ccw-device.c     | 4 +---
 hw/s390x/ccw-device.h     | 5 +++++
 hw/s390x/virtio-ccw-blk.c | 1 +
 hw/s390x/virtio-ccw-net.c | 1 +
 hw/vfio/ccw.c             | 1 +
 5 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/hw/s390x/ccw-device.c b/hw/s390x/ccw-device.c
index 4e54f34b1c..d7bb364579 100644
--- a/hw/s390x/ccw-device.c
+++ b/hw/s390x/ccw-device.c
@@ -73,7 +73,7 @@ static void ccw_device_set_loadparm(Object *obj, Visitor *v,
     s390_ipl_fmt_loadparm(dev->loadparm, val, errp);
 }
 
-static const PropertyInfo ccw_loadparm = {
+const PropertyInfo ccw_loadparm = {
     .name  = "ccw_loadparm",
     .description = "Up to 8 chars in set of [A-Za-z0-9. ] to pass"
             " to the guest loader/kernel",
@@ -85,8 +85,6 @@ static Property ccw_device_properties[] = {
     DEFINE_PROP_CSS_DEV_ID("devno", CcwDevice, devno),
     DEFINE_PROP_CSS_DEV_ID_RO("dev_id", CcwDevice, dev_id),
     DEFINE_PROP_CSS_DEV_ID_RO("subch_id", CcwDevice, subch_id),
-    DEFINE_PROP("loadparm", CcwDevice, loadparm, ccw_loadparm,
-            typeof(uint8_t[8])),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/s390x/ccw-device.h b/hw/s390x/ccw-device.h
index 1e1737c0f3..4439feb140 100644
--- a/hw/s390x/ccw-device.h
+++ b/hw/s390x/ccw-device.h
@@ -51,4 +51,9 @@ static inline CcwDevice *to_ccw_dev_fast(DeviceState *d)
 
 OBJECT_DECLARE_TYPE(CcwDevice, CCWDeviceClass, CCW_DEVICE)
 
+extern const PropertyInfo ccw_loadparm;
+
+#define DEFINE_PROP_CCW_LOADPARM(_n, _s, _f) \
+    DEFINE_PROP(_n, _s, _f, ccw_loadparm, typeof(uint8_t[8]))
+
 #endif
diff --git a/hw/s390x/virtio-ccw-blk.c b/hw/s390x/virtio-ccw-blk.c
index 8e0e58b77d..2364432c6e 100644
--- a/hw/s390x/virtio-ccw-blk.c
+++ b/hw/s390x/virtio-ccw-blk.c
@@ -48,6 +48,7 @@ static Property virtio_ccw_blk_properties[] = {
                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
                        VIRTIO_CCW_MAX_REV),
+    DEFINE_PROP_CCW_LOADPARM("loadparm", CcwDevice, loadparm),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/s390x/virtio-ccw-net.c b/hw/s390x/virtio-ccw-net.c
index 484e617659..a4a3f65c7e 100644
--- a/hw/s390x/virtio-ccw-net.c
+++ b/hw/s390x/virtio-ccw-net.c
@@ -51,6 +51,7 @@ static Property virtio_ccw_net_properties[] = {
                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
                        VIRTIO_CCW_MAX_REV),
+    DEFINE_PROP_CCW_LOADPARM("loadparm", CcwDevice, loadparm),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index 115862f430..99f16614ad 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -662,6 +662,7 @@ static Property vfio_ccw_properties[] = {
     DEFINE_PROP_LINK("iommufd", VFIOCCWDevice, vdev.iommufd,
                      TYPE_IOMMUFD_BACKEND, IOMMUFDBackend *),
 #endif
+    DEFINE_PROP_CCW_LOADPARM("loadparm", CcwDevice, loadparm),
     DEFINE_PROP_END_OF_LIST(),
 };
 
-- 
2.39.3