char *type;
char *dev;
char *devtype;
+ bool directiosafe;
const char *fileproto;
const char *filename;
int ring_ref;
{
struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
int info = 0;
+ char *directiosafe = NULL;
/* read xenstore entries */
if (blkdev->params == NULL) {
if (blkdev->devtype == NULL) {
blkdev->devtype = xenstore_read_be_str(&blkdev->xendev, "device-type");
}
+ directiosafe = xenstore_read_be_str(&blkdev->xendev, "direct-io-safe");
+ blkdev->directiosafe = (directiosafe && atoi(directiosafe));
/* do we have all we need? */
if (blkdev->params == NULL ||
xenstore_write_be_int(&blkdev->xendev, "feature-flush-cache", 1);
xenstore_write_be_int(&blkdev->xendev, "feature-persistent", 1);
xenstore_write_be_int(&blkdev->xendev, "info", info);
+
+ g_free(directiosafe);
return 0;
out_error:
blkdev->dev = NULL;
g_free(blkdev->devtype);
blkdev->devtype = NULL;
+ g_free(directiosafe);
+ blkdev->directiosafe = false;
return -1;
}
bool readonly = true;
/* read-only ? */
- qflags = BDRV_O_CACHE_WB | BDRV_O_NATIVE_AIO;
+ if (blkdev->directiosafe) {
+ qflags = BDRV_O_NOCACHE | BDRV_O_NATIVE_AIO;
+ } else {
+ qflags = BDRV_O_CACHE_WB;
+ }
if (strcmp(blkdev->mode, "w") == 0) {
qflags |= BDRV_O_RDWR;
readonly = false;
--- /dev/null
+/* Copyright (c) Citrix Systems Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms,
+ * with or without modification, are permitted provided
+ * that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the
+ * following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the
+ * following disclaimer in the documentation and/or other
+ * materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "hw/hw.h"
+#include "hw/pci/pci.h"
+#include "trace.h"
+
+#define TYPE_XEN_PV_DEVICE "xen-pvdevice"
+
+#define XEN_PV_DEVICE(obj) \
+ OBJECT_CHECK(XenPVDevice, (obj), TYPE_XEN_PV_DEVICE)
+
+typedef struct XenPVDevice {
+ /*< private >*/
+ PCIDevice parent_obj;
+ /*< public >*/
+ uint16_t vendor_id;
+ uint16_t device_id;
+ uint8_t revision;
+ uint32_t size;
+ MemoryRegion mmio;
+} XenPVDevice;
+
+static uint64_t xen_pv_mmio_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ trace_xen_pv_mmio_read(addr);
+
+ return ~(uint64_t)0;
+}
+
+static void xen_pv_mmio_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned size)
+{
+ trace_xen_pv_mmio_write(addr);
+}
+
+static const MemoryRegionOps xen_pv_mmio_ops = {
+ .read = &xen_pv_mmio_read,
+ .write = &xen_pv_mmio_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+static int xen_pv_init(PCIDevice *pci_dev)
+{
+ XenPVDevice *d = XEN_PV_DEVICE(pci_dev);
+ uint8_t *pci_conf;
+
+ pci_conf = pci_dev->config;
+
+ pci_set_word(pci_conf + PCI_VENDOR_ID, d->vendor_id);
+ pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, d->vendor_id);
+ pci_set_word(pci_conf + PCI_DEVICE_ID, d->device_id);
+ pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, d->device_id);
+ pci_set_byte(pci_conf + PCI_REVISION_ID, d->revision);
+
+ pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_MEMORY);
+
+ pci_config_set_prog_interface(pci_conf, 0);
+
+ pci_conf[PCI_INTERRUPT_PIN] = 1;
+
+ memory_region_init_io(&d->mmio, NULL, &xen_pv_mmio_ops, d,
+ "mmio", d->size);
+
+ pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
+ &d->mmio);
+
+ return 0;
+}
+
+static Property xen_pv_props[] = {
+ DEFINE_PROP_UINT16("vendor-id", XenPVDevice, vendor_id, PCI_VENDOR_ID_XEN),
+ DEFINE_PROP_UINT16("device-id", XenPVDevice, device_id, PCI_DEVICE_ID_XEN_PVDEVICE),
+ DEFINE_PROP_UINT8("revision", XenPVDevice, revision, 0x01),
+ DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000),
+ DEFINE_PROP_END_OF_LIST()
+};
+
+static void xen_pv_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ k->init = xen_pv_init;
+ k->class_id = PCI_CLASS_SYSTEM_OTHER;
+ dc->desc = "Xen PV Device";
+ dc->props = xen_pv_props;
+}
+
+static const TypeInfo xen_pv_type_info = {
+ .name = TYPE_XEN_PV_DEVICE,
+ .parent = TYPE_PCI_DEVICE,
+ .instance_size = sizeof(XenPVDevice),
+ .class_init = xen_pv_class_init,
+};
+
+static void xen_pv_register_types(void)
+{
+ type_register_static(&xen_pv_type_info);
+}
+
+type_init(xen_pv_register_types)
projects / mirror_qemu.git / commitdiff