Merge remote-tracking branch 'remotes/thuth/tags/pull-request-2021-10-15' into staging

* Check kernel command line size on s390x
* Simplification of one of the SIGP instructions on s390x
* Cornelia stepping down as maintainer in some subsystems
* Update the dtc submodule to a proper release version

# gpg: Signature made Fri 15 Oct 2021 02:11:13 AM PDT
# gpg:                using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg:                issuer "[email protected]"
# gpg: Good signature from "Thomas Huth <[email protected]>" [full]
# gpg:                 aka "Thomas Huth <[email protected]>" [full]
# gpg:                 aka "Thomas Huth <[email protected]>" [unknown]
# gpg:                 aka "Thomas Huth <[email protected]>" [full]

* remotes/thuth/tags/pull-request-2021-10-15:
  dtc: Update to version 1.6.1
  s390x virtio-ccw machine: step down as maintainer
  s390x/kvm: step down as maintainer
  vfio-ccw: step down as maintainer
  s390x: sigp: Force Set Architecture to return Invalid Parameter
  s390x/ipl: check kernel command line size

Signed-off-by: Richard Henderson <[email protected]>

Author: rth7680

MAINTAINERS

@@ -393,7 +393,6 @@ F: target/ppc/kvm.c
 
 S390 KVM CPUs
 M: Halil Pasic <[email protected]>
-M: Cornelia Huck <[email protected]>
 M: Christian Borntraeger <[email protected]>
 S: Supported
 F: target/s390x/kvm/
@@ -408,7 +407,6 @@ F: hw/intc/s390_flic.c
 F: hw/intc/s390_flic_kvm.c
 F: include/hw/s390x/s390_flic.h
 F: gdb-xml/s390*.xml
-T: git https://gitlab.com/cohuck/qemu.git s390-next
 T: git https://github.com/borntraeger/qemu.git s390-next
 L: [email protected]
 
@@ -1514,7 +1512,6 @@ F: tests/acceptance/machine_sparc_leon3.py
 S390 Machines
 -------------
 S390 Virtio-ccw
-M: Cornelia Huck <[email protected]>
 M: Halil Pasic <[email protected]>
 M: Christian Borntraeger <[email protected]>
 S: Supported
@@ -1526,7 +1523,6 @@ F: hw/watchdog/wdt_diag288.c
 F: include/hw/watchdog/wdt_diag288.h
 F: configs/devices/s390x-softmmu/default.mak
 F: tests/acceptance/machine_s390_ccw_virtio.py
-T: git https://gitlab.com/cohuck/qemu.git s390-next
 T: git https://github.com/borntraeger/qemu.git s390-next
 L: [email protected]
 
@@ -1865,15 +1861,13 @@ F: docs/igd-assign.txt
 F: docs/devel/vfio-migration.rst
 
 vfio-ccw
-M: Cornelia Huck <[email protected]>
 M: Eric Farman <[email protected]>
 M: Matthew Rosato <[email protected]>
 S: Supported
 F: hw/vfio/ccw.c
 F: hw/s390x/s390-ccw.c
 F: include/hw/s390x/s390-ccw.h
 F: include/hw/s390x/vfio-ccw.h
-T: git https://gitlab.com/cohuck/qemu.git s390-next
 L: [email protected]
 
 vfio-ap

dtc

@@ -38,6 +38,7 @@
 #define KERN_IMAGE_START                0x010000UL
 #define LINUX_MAGIC_ADDR                0x010008UL
 #define KERN_PARM_AREA                  0x010480UL
+#define KERN_PARM_AREA_SIZE             0x000380UL
 #define INITRD_START                    0x800000UL
 #define INITRD_PARM_START               0x010408UL
 #define PARMFILE_START                  0x001000UL
@@ -190,10 +191,19 @@ static void s390_ipl_realize(DeviceState *dev, Error **errp)
          * loader) and it won't work. For this case we force it to 0x10000, too.
          */
         if (pentry == KERN_IMAGE_START || pentry == 0x800) {
-            char *parm_area = rom_ptr(KERN_PARM_AREA, strlen(ipl->cmdline) + 1);
+            size_t cmdline_size = strlen(ipl->cmdline) + 1;
+            char *parm_area = rom_ptr(KERN_PARM_AREA, cmdline_size);
+
             ipl->start_addr = KERN_IMAGE_START;
             /* Overwrite parameters in the kernel image, which are "rom" */
             if (parm_area) {
+                if (cmdline_size > KERN_PARM_AREA_SIZE) {
+                    error_setg(errp,
+                               "kernel command line exceeds maximum size: %zu > %lu",
+                               cmdline_size, KERN_PARM_AREA_SIZE);
+                    return;
+                }
+
                 strcpy(parm_area, ipl->cmdline);
             }
         } else {

hw/s390x/ipl.c

@@ -428,26 +428,10 @@ static int handle_sigp_single_dst(S390CPU *cpu, S390CPU *dst_cpu, uint8_t order,
 static int sigp_set_architecture(S390CPU *cpu, uint32_t param,
                                  uint64_t *status_reg)
 {
-    CPUState *cur_cs;
-    S390CPU *cur_cpu;
-    bool all_stopped = true;
-
-    CPU_FOREACH(cur_cs) {
-        cur_cpu = S390_CPU(cur_cs);
-
-        if (cur_cpu == cpu) {
-            continue;
-        }
-        if (s390_cpu_get_state(cur_cpu) != S390_CPU_STATE_STOPPED) {
-            all_stopped = false;
-        }
-    }
-
     *status_reg &= 0xffffffff00000000ULL;
 
     /* Reject set arch order, with czam we're always in z/Arch mode. */
-    *status_reg |= (all_stopped ? SIGP_STAT_INVALID_PARAMETER :
-                    SIGP_STAT_INCORRECT_STATE);
+    *status_reg |= SIGP_STAT_INVALID_PARAMETER;
     return SIGP_CC_STATUS_STORED;
 }