diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index 5bfc5b7483062e213c0f8af946f42fc703d368f9..a800ea7a9fde2971350f0d2464ae09cd68aed4ad 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -252,7 +252,7 @@ static void pc_dimm_realize(DeviceState *dev, Error **errp)
error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set");
return;
}
- if (dimm->node >= nb_numa_nodes) {
+ if ((nb_numa_nodes > 0) && (dimm->node >= nb_numa_nodes)) {
error_setg(errp, "'DIMM property " PC_DIMM_NODE_PROP " has value %"
PRIu32 "' which exceeds the number of numa nodes: %d",
dimm->node, nb_numa_nodes);
diff --git a/hw/pci/pci-hotplug-old.c b/hw/pci/pci-hotplug-old.c
index cf2caebfb1b6cfe8d5380d1ac8026fb92dbc2ea4..d87c469096aef44fc86df8b83b5357304b2cb544 100644
--- a/hw/pci/pci-hotplug-old.c
+++ b/hw/pci/pci-hotplug-old.c
@@ -107,6 +107,7 @@ static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
{
SCSIBus *scsibus;
SCSIDevice *scsidev;
+ Error *local_err = NULL;
scsibus = (SCSIBus *)
object_dynamic_cast(OBJECT(QLIST_FIRST(&adapter->child_bus)),
@@ -127,8 +128,10 @@ static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
dinfo->bus = scsibus->busnr;
scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit,
- false, -1, NULL, NULL);
+ false, -1, NULL, &local_err);
if (!scsidev) {
+ error_report("%s", error_get_pretty(local_err));
+ error_free(local_err);
return -1;
}
dinfo->unit = scsidev->id;
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index f5608140f9e97b7f1f402da1e669083b8a5eb533..a827cd41bf80c823038485dd8383df8bf5ee1772 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -86,6 +86,9 @@
* 12 is historical, and due to x86 page size. */
#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
+/* Flags track per-device state like workarounds for quirks in older guests. */
+#define VIRTIO_PCI_FLAG_BUS_MASTER_BUG (1 << 0)
+
static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
VirtIOPCIProxy *dev);
@@ -320,6 +323,14 @@ static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
proxy->pci_dev.config[PCI_COMMAND] |
PCI_COMMAND_MASTER, 1);
}
+
+ /* Linux before 2.6.34 sets the device as OK without enabling
+ the PCI device bus master bit. In this case we need to disable
+ some safety checks. */
+ if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
+ !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
+ proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
+ }
break;
case VIRTIO_MSI_CONFIG_VECTOR:
msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
@@ -469,18 +480,13 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
- uint8_t cmd = proxy->pci_dev.config[PCI_COMMAND];
-
pci_default_write_config(pci_dev, address, val, len);
if (range_covers_byte(address, len, PCI_COMMAND) &&
!(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) &&
- (cmd & PCI_COMMAND_MASTER)) {
- /* Bus driver disables bus mastering - make it act
- * as a kind of reset to render the device quiescent. */
+ !(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) {
virtio_pci_stop_ioeventfd(proxy);
- virtio_reset(vdev);
- msix_unuse_all_vectors(&proxy->pci_dev);
+ virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
}
}
@@ -889,19 +895,11 @@ static void virtio_pci_vmstate_change(DeviceState *d, bool running)
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
if (running) {
- /* Linux before 2.6.34 drives the device without enabling
- the PCI device bus master bit. Enable it automatically
- for the guest. This is a PCI spec violation but so is
- initiating DMA with bus master bit clear.
- Note: this only makes a difference when migrating
- across QEMU versions from an old QEMU, as for new QEMU
- bus master and driver bits are always in sync.
- TODO: consider enabling conditionally for compat machine types. */
- if (vdev->status & (VIRTIO_CONFIG_S_ACKNOWLEDGE |
- VIRTIO_CONFIG_S_DRIVER)) {
- pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
- proxy->pci_dev.config[PCI_COMMAND] |
- PCI_COMMAND_MASTER, 1);
+ /* Try to find out if the guest has bus master disabled, but is
+ in ready state. Then we have a buggy guest OS. */
+ if ((vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
+ !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
+ proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
}
virtio_pci_start_ioeventfd(proxy);
} else {
@@ -1042,6 +1040,7 @@ static void virtio_pci_reset(DeviceState *qdev)
virtio_pci_stop_ioeventfd(proxy);
virtio_bus_reset(bus);
msix_unuse_all_vectors(&proxy->pci_dev);
+ proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
}
static Property virtio_pci_properties[] = {
diff --git a/include/hw/elf_ops.h b/include/hw/elf_ops.h
index c6b5129bab394704cf2197fe079ab195ec84ec2a..a517753a6fe1b8efe043ac488cd42a4bd8517d71 100644
--- a/include/hw/elf_ops.h
+++ b/include/hw/elf_ops.h
@@ -147,18 +147,13 @@ static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab,
}
i++;
}
- if (nsyms) {
- syms = g_realloc(syms, nsyms * sizeof(*syms));
+ syms = g_realloc(syms, nsyms * sizeof(*syms));
- qsort(syms, nsyms, sizeof(*syms), glue(symcmp, SZ));
- for (i = 0; i < nsyms - 1; i++) {
- if (syms[i].st_size == 0) {
- syms[i].st_size = syms[i + 1].st_value - syms[i].st_value;
- }
+ qsort(syms, nsyms, sizeof(*syms), glue(symcmp, SZ));
+ for (i = 0; i < nsyms - 1; i++) {
+ if (syms[i].st_size == 0) {
+ syms[i].st_size = syms[i + 1].st_value - syms[i].st_value;
}
- } else {
- g_free(syms);
- syms = NULL;
}
/* String table */
diff --git a/vl.c b/vl.c
index dbdca594b749c303a93d09da73738f561b86d1d0..9d2aaaf1dcf2281b34c973f4da172667dda9df96 100644
--- a/vl.c
+++ b/vl.c
@@ -134,6 +134,7 @@ const char* keyboard_layout = NULL;
ram_addr_t ram_size;
const char *mem_path = NULL;
int mem_prealloc = 0; /* force preallocation of physical target memory */
+bool enable_mlock = false;
int nb_nics;
NICInfo nd_table[MAX_NICS];
int autostart;
@@ -1421,12 +1422,8 @@ static void smp_parse(QemuOpts *opts)
}
-static void configure_realtime(QemuOpts *opts)
+static void realtime_init(void)
{
- bool enable_mlock;
-
- enable_mlock = qemu_opt_get_bool(opts, "mlock", true);
-
if (enable_mlock) {
if (os_mlock() < 0) {
fprintf(stderr, "qemu: locking memory failed\n");
@@ -3974,7 +3971,7 @@ int main(int argc, char **argv, char **envp)
if (!opts) {
exit(1);
}
- configure_realtime(opts);
+ enable_mlock = qemu_opt_get_bool(opts, "mlock", true);
break;
case QEMU_OPTION_msg:
opts = qemu_opts_parse(qemu_find_opts("msg"), optarg, 0);
@@ -4442,6 +4439,8 @@ int main(int argc, char **argv, char **envp)
machine_class->init(current_machine);
+ realtime_init();
+
audio_init();
cpu_synchronize_all_post_init();