7 files changed, 37 insertions, 14 deletions

diff --git a/hw/mips/mips_fulong2e.c b/hw/mips/mips_fulong2e.c
index b13750d0d9..e8d5dd0980 100644
--- a/hw/mips/mips_fulong2e.c
+++ b/hw/mips/mips_fulong2e.c
@@ -44,6 +44,7 @@
 #include "sysemu/blockdev.h"
 #include "exec/address-spaces.h"
 #include "sysemu/qtest.h"
+#include "qemu/error-report.h"
 
 #define DEBUG_FULONG2E_INIT
 
@@ -335,7 +336,8 @@ static void mips_fulong2e_init(QEMUMachineInitArgs *args)
 
         if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
             !kernel_filename && !qtest_enabled()) {
-            fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n", bios_name);
+            error_report("Could not load MIPS bios '%s'", bios_name);
+            exit(1);
         }
     }
 
diff --git a/hw/mips/mips_jazz.c b/hw/mips/mips_jazz.c
index 36677cc652..d748ded7eb 100644
--- a/hw/mips/mips_jazz.c
+++ b/hw/mips/mips_jazz.c
@@ -43,6 +43,7 @@
 #include "hw/sysbus.h"
 #include "exec/address-spaces.h"
 #include "sysemu/qtest.h"
+#include "qemu/error-report.h"
 
 enum jazz_model_e
 {
@@ -178,8 +179,8 @@ static void mips_jazz_init(MemoryRegion *address_space,
         bios_size = -1;
     }
     if ((bios_size < 0 || bios_size > MAGNUM_BIOS_SIZE) && !qtest_enabled()) {
-        fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n",
-                bios_name);
+        error_report("Could not load MIPS bios '%s'", bios_name);
+        exit(1);
     }
 
     /* Init CPU internal devices */
diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c
index f56f34f3e6..0f5de338fa 100644
--- a/hw/mips/mips_malta.c
+++ b/hw/mips/mips_malta.c
@@ -49,6 +49,7 @@
 #include "hw/sysbus.h"             /* SysBusDevice */
 #include "qemu/host-utils.h"
 #include "sysemu/qtest.h"
+#include "qemu/error-report.h"
 
 //#define DEBUG_BOARD_INIT
 
@@ -1008,9 +1009,9 @@ void mips_malta_init(QEMUMachineInitArgs *args)
             }
             if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
                 !kernel_filename && !qtest_enabled()) {
-                fprintf(stderr,
-                        "qemu: Warning, could not load MIPS bios '%s', and no -kernel argument was specified\n",
-                        bios_name);
+                error_report("Could not load MIPS bios '%s', and no "
+                             "-kernel argument was specified", bios_name);
+                exit(1);
             }
         }
         /* In little endian mode the 32bit words in the bios are swapped,
diff --git a/hw/mips/mips_mipssim.c b/hw/mips/mips_mipssim.c
index fea1a15916..297f01e268 100644
--- a/hw/mips/mips_mipssim.c
+++ b/hw/mips/mips_mipssim.c
@@ -37,6 +37,7 @@
 #include "elf.h"
 #include "hw/sysbus.h"
 #include "exec/address-spaces.h"
+#include "qemu/error-report.h"
 
 static struct _loaderparams {
     int ram_size;
@@ -191,9 +192,9 @@ mips_mipssim_init(QEMUMachineInitArgs *args)
     }
     if ((bios_size < 0 || bios_size > BIOS_SIZE) && !kernel_filename) {
         /* Bail out if we have neither a kernel image nor boot vector code. */
-        fprintf(stderr,
-                "qemu: Warning, could not load MIPS bios '%s', and no -kernel argument was specified\n",
-                filename);
+        error_report("Could not load MIPS bios '%s', and no "
+                     "-kernel argument was specified", filename);
+        exit(1);
     } else {
         /* We have a boot vector start address. */
         env->active_tc.PC = (target_long)(int32_t)0xbfc00000;
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index ff5f68135c..58c88b8a6b 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -2672,7 +2672,7 @@ static void xhci_port_update(XHCIPort *port, int is_detach)
     xhci_port_notify(port, PORTSC_CSC);
 }
 
-static void xhci_port_reset(XHCIPort *port)
+static void xhci_port_reset(XHCIPort *port, bool warm_reset)
 {
     trace_usb_xhci_port_reset(port->portnr);
 
@@ -2683,6 +2683,11 @@ static void xhci_port_reset(XHCIPort *port)
     usb_device_reset(port->uport->dev);
 
     switch (port->uport->dev->speed) {
+    case USB_SPEED_SUPER:
+        if (warm_reset) {
+            port->portsc |= PORTSC_WRC;
+        }
+        /* fall through */
     case USB_SPEED_LOW:
     case USB_SPEED_FULL:
     case USB_SPEED_HIGH:
@@ -2845,8 +2850,12 @@ static void xhci_port_write(void *ptr, hwaddr reg,
     switch (reg) {
     case 0x00: /* PORTSC */
         /* write-1-to-start bits */
+        if (val & PORTSC_WPR) {
+            xhci_port_reset(port, true);
+            break;
+        }
         if (val & PORTSC_PR) {
-            xhci_port_reset(port);
+            xhci_port_reset(port, false);
             break;
         }
 
diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c
index 88cf994b97..4bd29533f3 100644
--- a/hw/virtio/virtio-mmio.c
+++ b/hw/virtio/virtio-mmio.c
@@ -151,6 +151,9 @@ static uint64_t virtio_mmio_read(void *opaque, hwaddr offset, unsigned size)
         }
         return proxy->host_features;
     case VIRTIO_MMIO_QUEUENUMMAX:
+        if (!virtio_queue_get_num(vdev, vdev->queue_sel)) {
+            return 0;
+        }
         return VIRTQUEUE_MAX_SIZE;
     case VIRTIO_MMIO_QUEUEPFN:
         return virtio_queue_get_addr(vdev, vdev->queue_sel)
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 706bdf4c46..f03c45dff5 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -673,10 +673,16 @@ hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n)
 
 void virtio_queue_set_num(VirtIODevice *vdev, int n, int num)
 {
-    if (num <= VIRTQUEUE_MAX_SIZE) {
-        vdev->vq[n].vring.num = num;
-        virtqueue_init(&vdev->vq[n]);
+    /* Don't allow guest to flip queue between existent and
+     * nonexistent states, or to set it to an invalid size.
+     */
+    if (!!num != !!vdev->vq[n].vring.num ||
+        num > VIRTQUEUE_MAX_SIZE ||
+        num < 0) {
+        return;
     }
+    vdev->vq[n].vring.num = num;
+    virtqueue_init(&vdev->vq[n]);
 }
 
 int virtio_queue_get_num(VirtIODevice *vdev, int n)