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authorAnthony Liguori <aliguori@us.ibm.com>2012-06-26 15:05:33 -0500
committerAnthony Liguori <aliguori@us.ibm.com>2012-06-26 15:05:33 -0500
commit7a542b67b32742ff5fe286f819df891d1df7bf56 (patch)
treecc85c3d9c0c381ae32178616c5956879cd554cb4
parentb1a6609e754330c657a057a96322e574c129bc29 (diff)
parent3854ca577dad92c4fe97b4a6ebce360e25407af7 (diff)
Merge remote-tracking branch 'sstabellini/xen-pt' into staging
* sstabellini/xen-pt: Introduce Xen PCI Passthrough, MSI Introduce apic-msidef.h Introduce Xen PCI Passthrough, PCI config space helpers Introduce Xen PCI Passthrough, qdevice qdev-properties: Introduce pci-host-devaddr. pci.c: Add opaque argument to pci_for_each_device. Introduce XenHostPCIDevice to access a pci device on the host. configure: Introduce --enable-xen-pci-passthrough. pci_ids: Add INTEL_82599_SFP_VF id.
Diffstat
-rwxr-xr-xconfigure29
-rw-r--r--hw/apic-msidef.h30
-rw-r--r--hw/apic.c11
-rw-r--r--hw/i386/Makefile.objs2
-rw-r--r--hw/pci.c11
-rw-r--r--hw/pci.h4
-rw-r--r--hw/pci_ids.h1
-rw-r--r--hw/qdev-properties.c107
-rw-r--r--hw/qdev.h3
-rw-r--r--hw/xen-host-pci-device.c396
-rw-r--r--hw/xen-host-pci-device.h55
-rw-r--r--hw/xen_common.h3
-rw-r--r--hw/xen_platform.c8
-rw-r--r--hw/xen_pt.c851
-rw-r--r--hw/xen_pt.h301
-rw-r--r--hw/xen_pt_config_init.c1869
-rw-r--r--hw/xen_pt_msi.c620
-rw-r--r--qemu-common.h7
-rw-r--r--xen-all.c12
19 files changed, 4301 insertions, 19 deletions
diff --git a/configure b/configure
index 6128ba7522..4e4ae8c23a 100755
--- a/configure
+++ b/configure
@@ -137,6 +137,7 @@ vnc_png=""
vnc_thread="no"
xen=""
xen_ctrl_version=""
+xen_pci_passthrough=""
linux_aio=""
cap_ng=""
attr=""
@@ -684,6 +685,10 @@ for opt do
;;
--enable-xen) xen="yes"
;;
+ --disable-xen-pci-passthrough) xen_pci_passthrough="no"
+ ;;
+ --enable-xen-pci-passthrough) xen_pci_passthrough="yes"
+ ;;
--disable-brlapi) brlapi="no"
;;
--enable-brlapi) brlapi="yes"
@@ -1031,6 +1036,8 @@ echo " (affects only QEMU, not qemu-img)"
echo " --enable-mixemu enable mixer emulation"
echo " --disable-xen disable xen backend driver support"
echo " --enable-xen enable xen backend driver support"
+echo " --disable-xen-pci-passthrough"
+echo " --enable-xen-pci-passthrough"
echo " --disable-brlapi disable BrlAPI"
echo " --enable-brlapi enable BrlAPI"
echo " --disable-vnc-tls disable TLS encryption for VNC server"
@@ -1507,6 +1514,25 @@ EOF
fi
fi
+if test "$xen_pci_passthrough" != "no"; then
+ if test "$xen" = "yes" && test "$linux" = "yes" &&
+ test "$xen_ctrl_version" -ge 340; then
+ xen_pci_passthrough=yes
+ else
+ if test "$xen_pci_passthrough" = "yes"; then
+ echo "ERROR"
+ echo "ERROR: User requested feature Xen PCI Passthrough"
+ echo "ERROR: but this feature require /sys from Linux"
+ if test "$xen_ctrl_version" -lt 340; then
+ echo "ERROR: This feature does not work with Xen 3.3"
+ fi
+ echo "ERROR"
+ exit 1;
+ fi
+ xen_pci_passthrough=no
+ fi
+fi
+
##########################################
# pkg-config probe
@@ -3702,6 +3728,9 @@ case "$target_arch2" in
if test "$xen" = "yes" -a "$target_softmmu" = "yes" ; then
target_phys_bits=64
echo "CONFIG_XEN=y" >> $config_target_mak
+ if test "$xen_pci_passthrough" = yes; then
+ echo "CONFIG_XEN_PCI_PASSTHROUGH=y" >> "$config_target_mak"
+ fi
else
echo "CONFIG_NO_XEN=y" >> $config_target_mak
fi
diff --git a/hw/apic-msidef.h b/hw/apic-msidef.h
new file mode 100644
index 0000000000..6e2eb71f2f
--- /dev/null
+++ b/hw/apic-msidef.h
@@ -0,0 +1,30 @@
+#ifndef HW_APIC_MSIDEF_H
+#define HW_APIC_MSIDEF_H
+
+/*
+ * Intel APIC constants: from include/asm/msidef.h
+ */
+
+/*
+ * Shifts for MSI data
+ */
+
+#define MSI_DATA_VECTOR_SHIFT 0
+#define MSI_DATA_VECTOR_MASK 0x000000ff
+
+#define MSI_DATA_DELIVERY_MODE_SHIFT 8
+#define MSI_DATA_LEVEL_SHIFT 14
+#define MSI_DATA_TRIGGER_SHIFT 15
+
+/*
+ * Shift/mask fields for msi address
+ */
+
+#define MSI_ADDR_DEST_MODE_SHIFT 2
+
+#define MSI_ADDR_REDIRECTION_SHIFT 3
+
+#define MSI_ADDR_DEST_ID_SHIFT 12
+#define MSI_ADDR_DEST_ID_MASK 0x00ffff0
+
+#endif /* HW_APIC_MSIDEF_H */
diff --git a/hw/apic.c b/hw/apic.c
index 5fbf01c278..60552df619 100644
--- a/hw/apic.c
+++ b/hw/apic.c
@@ -23,19 +23,10 @@
#include "host-utils.h"
#include "trace.h"
#include "pc.h"
+#include "apic-msidef.h"
#define MAX_APIC_WORDS 8
-/* Intel APIC constants: from include/asm/msidef.h */
-#define MSI_DATA_VECTOR_SHIFT 0
-#define MSI_DATA_VECTOR_MASK 0x000000ff
-#define MSI_DATA_DELIVERY_MODE_SHIFT 8
-#define MSI_DATA_TRIGGER_SHIFT 15
-#define MSI_DATA_LEVEL_SHIFT 14
-#define MSI_ADDR_DEST_MODE_SHIFT 2
-#define MSI_ADDR_DEST_ID_SHIFT 12
-#define MSI_ADDR_DEST_ID_MASK 0x00ffff0
-
#define SYNC_FROM_VAPIC 0x1
#define SYNC_TO_VAPIC 0x2
#define SYNC_ISR_IRR_TO_VAPIC 0x4
diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs
index eb171b7c47..8c764bbfef 100644
--- a/hw/i386/Makefile.objs
+++ b/hw/i386/Makefile.objs
@@ -7,6 +7,8 @@ obj-y += debugcon.o multiboot.o
obj-y += pc_piix.o
obj-y += pc_sysfw.o
obj-$(CONFIG_XEN) += xen_platform.o xen_apic.o
+obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen-host-pci-device.o
+obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o xen_pt_msi.o
obj-y += kvm/
obj-$(CONFIG_SPICE) += qxl.o qxl-logger.o qxl-render.o
diff --git a/hw/pci.c b/hw/pci.c
index bdfb3d6540..5c75f16781 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -1144,7 +1144,9 @@ static const pci_class_desc pci_class_descriptions[] =
};
static void pci_for_each_device_under_bus(PCIBus *bus,
- void (*fn)(PCIBus *b, PCIDevice *d))
+ void (*fn)(PCIBus *b, PCIDevice *d,
+ void *opaque),
+ void *opaque)
{
PCIDevice *d;
int devfn;
@@ -1152,18 +1154,19 @@ static void pci_for_each_device_under_bus(PCIBus *bus,
for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
d = bus->devices[devfn];
if (d) {
- fn(bus, d);
+ fn(bus, d, opaque);
}
}
}
void pci_for_each_device(PCIBus *bus, int bus_num,
- void (*fn)(PCIBus *b, PCIDevice *d))
+ void (*fn)(PCIBus *b, PCIDevice *d, void *opaque),
+ void *opaque)
{
bus = pci_find_bus_nr(bus, bus_num);
if (bus) {
- pci_for_each_device_under_bus(bus, fn);
+ pci_for_each_device_under_bus(bus, fn, opaque);
}
}
diff --git a/hw/pci.h b/hw/pci.h
index 7f223c01e1..95b608cedd 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -312,7 +312,9 @@ PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
const char *default_devaddr);
int pci_bus_num(PCIBus *s);
-void pci_for_each_device(PCIBus *bus, int bus_num, void (*fn)(PCIBus *bus, PCIDevice *d));
+void pci_for_each_device(PCIBus *bus, int bus_num,
+ void (*fn)(PCIBus *bus, PCIDevice *d, void *opaque),
+ void *opaque);
PCIBus *pci_find_root_bus(int domain);
int pci_find_domain(const PCIBus *bus);
PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn);
diff --git a/hw/pci_ids.h b/hw/pci_ids.h
index e8235a7d05..649e6b379d 100644
--- a/hw/pci_ids.h
+++ b/hw/pci_ids.h
@@ -118,6 +118,7 @@
#define PCI_DEVICE_ID_INTEL_82801I_UHCI6 0x2939
#define PCI_DEVICE_ID_INTEL_82801I_EHCI1 0x293a
#define PCI_DEVICE_ID_INTEL_82801I_EHCI2 0x293c
+#define PCI_DEVICE_ID_INTEL_82599_SFP_VF 0x10ed
#define PCI_VENDOR_ID_XEN 0x5853
#define PCI_DEVICE_ID_XEN_PLATFORM 0x0001
diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c
index 099a7aa96f..0b894620c9 100644
--- a/hw/qdev-properties.c
+++ b/hw/qdev-properties.c
@@ -899,6 +899,113 @@ PropertyInfo qdev_prop_blocksize = {
.set = set_blocksize,
};
+/* --- pci host address --- */
+
+static void get_pci_host_devaddr(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ DeviceState *dev = DEVICE(obj);
+ Property *prop = opaque;
+ PCIHostDeviceAddress *addr = qdev_get_prop_ptr(dev, prop);
+ char buffer[] = "xxxx:xx:xx.x";
+ char *p = buffer;
+ int rc = 0;
+
+ rc = snprintf(buffer, sizeof(buffer), "%04x:%02x:%02x.%d",
+ addr->domain, addr->bus, addr->slot, addr->function);
+ assert(rc == sizeof(buffer) - 1);
+
+ visit_type_str(v, &p, name, errp);
+}
+
+/*
+ * Parse [<domain>:]<bus>:<slot>.<func>
+ * if <domain> is not supplied, it's assumed to be 0.
+ */
+static void set_pci_host_devaddr(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ DeviceState *dev = DEVICE(obj);
+ Property *prop = opaque;
+ PCIHostDeviceAddress *addr = qdev_get_prop_ptr(dev, prop);
+ Error *local_err = NULL;
+ char *str, *p;
+ char *e;
+ unsigned long val;
+ unsigned long dom = 0, bus = 0;
+ unsigned int slot = 0, func = 0;
+
+ if (dev->state != DEV_STATE_CREATED) {
+ error_set(errp, QERR_PERMISSION_DENIED);
+ return;
+ }
+
+ visit_type_str(v, &str, name, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ p = str;
+ val = strtoul(p, &e, 16);
+ if (e == p || *e != ':') {
+ goto inval;
+ }
+ bus = val;
+
+ p = e + 1;
+ val = strtoul(p, &e, 16);
+ if (e == p) {
+ goto inval;
+ }
+ if (*e == ':') {
+ dom = bus;
+ bus = val;
+ p = e + 1;
+ val = strtoul(p, &e, 16);
+ if (e == p) {
+ goto inval;
+ }
+ }
+ slot = val;
+
+ if (*e != '.') {
+ goto inval;
+ }
+ p = e + 1;
+ val = strtoul(p, &e, 10);
+ if (e == p) {
+ goto inval;
+ }
+ func = val;
+
+ if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7) {
+ goto inval;
+ }
+
+ if (*e) {
+ goto inval;
+ }
+
+ addr->domain = dom;
+ addr->bus = bus;
+ addr->slot = slot;
+ addr->function = func;
+
+ g_free(str);
+ return;
+
+inval:
+ error_set_from_qdev_prop_error(errp, EINVAL, dev, prop, str);
+ g_free(str);
+}
+
+PropertyInfo qdev_prop_pci_host_devaddr = {
+ .name = "pci-host-devaddr",
+ .get = get_pci_host_devaddr,
+ .set = set_pci_host_devaddr,
+};
+
/* --- public helpers --- */
static Property *qdev_prop_walk(Property *props, const char *name)
diff --git a/hw/qdev.h b/hw/qdev.h
index ae1d2812bf..f4683dc771 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -237,6 +237,7 @@ extern PropertyInfo qdev_prop_netdev;
extern PropertyInfo qdev_prop_vlan;
extern PropertyInfo qdev_prop_pci_devfn;
extern PropertyInfo qdev_prop_blocksize;
+extern PropertyInfo qdev_prop_pci_host_devaddr;
#define DEFINE_PROP(_name, _state, _field, _prop, _type) { \
.name = (_name), \
@@ -300,6 +301,8 @@ extern PropertyInfo qdev_prop_blocksize;
LostTickPolicy)
#define DEFINE_PROP_BLOCKSIZE(_n, _s, _f, _d) \
DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_blocksize, uint16_t)
+#define DEFINE_PROP_PCI_HOST_DEVADDR(_n, _s, _f) \
+ DEFINE_PROP(_n, _s, _f, qdev_prop_pci_host_devaddr, PCIHostDeviceAddress)
#define DEFINE_PROP_END_OF_LIST() \
{}
diff --git a/hw/xen-host-pci-device.c b/hw/xen-host-pci-device.c
new file mode 100644
index 0000000000..e7ff680ef2
--- /dev/null
+++ b/hw/xen-host-pci-device.c
@@ -0,0 +1,396 @@
+/*
+ * Copyright (C) 2011 Citrix Ltd.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu-common.h"
+#include "xen-host-pci-device.h"
+
+#define XEN_HOST_PCI_MAX_EXT_CAP \
+ ((PCIE_CONFIG_SPACE_SIZE - PCI_CONFIG_SPACE_SIZE) / (PCI_CAP_SIZEOF + 4))
+
+#ifdef XEN_HOST_PCI_DEVICE_DEBUG
+# define XEN_HOST_PCI_LOG(f, a...) fprintf(stderr, "%s: " f, __func__, ##a)
+#else
+# define XEN_HOST_PCI_LOG(f, a...) (void)0
+#endif
+
+/*
+ * from linux/ioport.h
+ * IO resources have these defined flags.
+ */
+#define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
+
+#define IORESOURCE_TYPE_BITS 0x00000f00 /* Resource type */
+#define IORESOURCE_IO 0x00000100
+#define IORESOURCE_MEM 0x00000200
+
+#define IORESOURCE_PREFETCH 0x00001000 /* No side effects */
+#define IORESOURCE_MEM_64 0x00100000
+
+static int xen_host_pci_sysfs_path(const XenHostPCIDevice *d,
+ const char *name, char *buf, ssize_t size)
+{
+ int rc;
+
+ rc = snprintf(buf, size, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/%s",
+ d->domain, d->bus, d->dev, d->func, name);
+
+ if (rc >= size || rc < 0) {
+ /* The ouput is truncated or an other error is encountered */
+ return -ENODEV;
+ }
+ return 0;
+}
+
+
+/* This size should be enough to read the first 7 lines of a ressource file */
+#define XEN_HOST_PCI_RESSOURCE_BUFFER_SIZE 400
+static int xen_host_pci_get_resource(XenHostPCIDevice *d)
+{
+ int i, rc, fd;
+ char path[PATH_MAX];
+ char buf[XEN_HOST_PCI_RESSOURCE_BUFFER_SIZE];
+ unsigned long long start, end, flags, size;
+ char *endptr, *s;
+ uint8_t type;
+
+ rc = xen_host_pci_sysfs_path(d, "resource", path, sizeof (path));
+ if (rc) {
+ return rc;
+ }
+ fd = open(path, O_RDONLY);
+ if (fd == -1) {
+ XEN_HOST_PCI_LOG("Error: Can't open %s: %s\n", path, strerror(errno));
+ return -errno;
+ }
+
+ do {
+ rc = read(fd, &buf, sizeof (buf) - 1);
+ if (rc < 0 && errno != EINTR) {
+ rc = -errno;
+ goto out;
+ }
+ } while (rc < 0);
+ buf[rc] = 0;
+ rc = 0;
+
+ s = buf;
+ for (i = 0; i < PCI_NUM_REGIONS; i++) {
+ type = 0;
+
+ start = strtoll(s, &endptr, 16);
+ if (*endptr != ' ' || s == endptr) {
+ break;
+ }
+ s = endptr + 1;
+ end = strtoll(s, &endptr, 16);
+ if (*endptr != ' ' || s == endptr) {
+ break;
+ }
+ s = endptr + 1;
+ flags = strtoll(s, &endptr, 16);
+ if (*endptr != '\n' || s == endptr) {
+ break;
+ }
+ s = endptr + 1;
+
+ if (start) {
+ size = end - start + 1;
+ } else {
+ size = 0;
+ }
+
+ if (flags & IORESOURCE_IO) {
+ type |= XEN_HOST_PCI_REGION_TYPE_IO;
+ }
+ if (flags & IORESOURCE_MEM) {
+ type |= XEN_HOST_PCI_REGION_TYPE_MEM;
+ }
+ if (flags & IORESOURCE_PREFETCH) {
+ type |= XEN_HOST_PCI_REGION_TYPE_PREFETCH;
+ }
+ if (flags & IORESOURCE_MEM_64) {
+ type |= XEN_HOST_PCI_REGION_TYPE_MEM_64;
+ }
+
+ if (i < PCI_ROM_SLOT) {
+ d->io_regions[i].base_addr = start;
+ d->io_regions[i].size = size;
+ d->io_regions[i].type = type;
+ d->io_regions[i].bus_flags = flags & IORESOURCE_BITS;
+ } else {
+ d->rom.base_addr = start;
+ d->rom.size = size;
+ d->rom.type = type;
+ d->rom.bus_flags = flags & IORESOURCE_BITS;
+ }
+ }
+ if (i != PCI_NUM_REGIONS) {
+ /* Invalid format or input to short */
+ rc = -ENODEV;
+ }
+
+out:
+ close(fd);
+ return rc;
+}
+
+/* This size should be enough to read a long from a file */
+#define XEN_HOST_PCI_GET_VALUE_BUFFER_SIZE 22
+static int xen_host_pci_get_value(XenHostPCIDevice *d, const char *name,
+ unsigned int *pvalue, int base)
+{
+ char path[PATH_MAX];
+ char buf[XEN_HOST_PCI_GET_VALUE_BUFFER_SIZE];
+ int fd, rc;
+ unsigned long value;
+ char *endptr;
+
+ rc = xen_host_pci_sysfs_path(d, name, path, sizeof (path));
+ if (rc) {
+ return rc;
+ }
+ fd = open(path, O_RDONLY);
+ if (fd == -1) {
+ XEN_HOST_PCI_LOG("Error: Can't open %s: %s\n", path, strerror(errno));
+ return -errno;
+ }
+ do {
+ rc = read(fd, &buf, sizeof (buf) - 1);
+ if (rc < 0 && errno != EINTR) {
+ rc = -errno;
+ goto out;
+ }
+ } while (rc < 0);
+ buf[rc] = 0;
+ value = strtol(buf, &endptr, base);
+ if (endptr == buf || *endptr != '\n') {
+ rc = -1;
+ } else if ((value == LONG_MIN || value == LONG_MAX) && errno == ERANGE) {
+ rc = -errno;
+ } else {
+ rc = 0;
+ *pvalue = value;
+ }
+out:
+ close(fd);
+ return rc;
+}
+
+static inline int xen_host_pci_get_hex_value(XenHostPCIDevice *d,
+ const char *name,
+ unsigned int *pvalue)
+{
+ return xen_host_pci_get_value(d, name, pvalue, 16);
+}
+
+static inline int xen_host_pci_get_dec_value(XenHostPCIDevice *d,
+ const char *name,
+ unsigned int *pvalue)
+{
+ return xen_host_pci_get_value(d, name, pvalue, 10);
+}
+
+static bool xen_host_pci_dev_is_virtfn(XenHostPCIDevice *d)
+{
+ char path[PATH_MAX];
+ struct stat buf;
+
+ if (xen_host_pci_sysfs_path(d, "physfn", path, sizeof (path))) {
+ return false;
+ }
+ return !stat(path, &buf);
+}
+
+static int xen_host_pci_config_open(XenHostPCIDevice *d)
+{
+ char path[PATH_MAX];
+ int rc;
+
+ rc = xen_host_pci_sysfs_path(d, "config", path, sizeof (path));
+ if (rc) {
+ return rc;
+ }
+ d->config_fd = open(path, O_RDWR);
+ if (d->config_fd < 0) {
+ return -errno;
+ }
+ return 0;
+}
+
+static int xen_host_pci_config_read(XenHostPCIDevice *d,
+ int pos, void *buf, int len)
+{
+ int rc;
+
+ do {
+ rc = pread(d->config_fd, buf, len, pos);
+ } while (rc < 0 && (errno == EINTR || errno == EAGAIN));
+ if (rc != len) {
+ return -errno;
+ }
+ return 0;
+}
+
+static int xen_host_pci_config_write(XenHostPCIDevice *d,
+ int pos, const void *buf, int len)
+{
+ int rc;
+
+ do {
+ rc = pwrite(d->config_fd, buf, len, pos);
+ } while (rc < 0 && (errno == EINTR || errno == EAGAIN));
+ if (rc != len) {
+ return -errno;
+ }
+ return 0;
+}
+
+
+int xen_host_pci_get_byte(XenHostPCIDevice *d, int pos, uint8_t *p)
+{
+ uint8_t buf;
+ int rc = xen_host_pci_config_read(d, pos, &buf, 1);
+ if (!rc) {
+ *p = buf;
+ }
+ return rc;
+}
+
+int xen_host_pci_get_word(XenHostPCIDevice *d, int pos, uint16_t *p)
+{
+ uint16_t buf;
+ int rc = xen_host_pci_config_read(d, pos, &buf, 2);
+ if (!rc) {
+ *p = le16_to_cpu(buf);
+ }
+ return rc;
+}
+
+int xen_host_pci_get_long(XenHostPCIDevice *d, int pos, uint32_t *p)
+{
+ uint32_t buf;
+ int rc = xen_host_pci_config_read(d, pos, &buf, 4);
+ if (!rc) {
+ *p = le32_to_cpu(buf);
+ }
+ return rc;
+}
+
+int xen_host_pci_get_block(XenHostPCIDevice *d, int pos, uint8_t *buf, int len)
+{
+ return xen_host_pci_config_read(d, pos, buf, len);
+}
+
+int xen_host_pci_set_byte(XenHostPCIDevice *d, int pos, uint8_t data)
+{
+ return xen_host_pci_config_write(d, pos, &data, 1);
+}
+
+int xen_host_pci_set_word(XenHostPCIDevice *d, int pos, uint16_t data)
+{
+ data = cpu_to_le16(data);
+ return xen_host_pci_config_write(d, pos, &data, 2);
+}
+
+int xen_host_pci_set_long(XenHostPCIDevice *d, int pos, uint32_t data)
+{
+ data = cpu_to_le32(data);
+ return xen_host_pci_config_write(d, pos, &data, 4);
+}
+
+int xen_host_pci_set_block(XenHostPCIDevice *d, int pos, uint8_t *buf, int len)
+{
+ return xen_host_pci_config_write(d, pos, buf, len);
+}
+
+int xen_host_pci_find_ext_cap_offset(XenHostPCIDevice *d, uint32_t cap)
+{
+ uint32_t header = 0;
+ int max_cap = XEN_HOST_PCI_MAX_EXT_CAP;
+ int pos = PCI_CONFIG_SPACE_SIZE;
+
+ do {
+ if (xen_host_pci_get_long(d, pos, &header)) {
+ break;
+ }
+ /*
+ * If we have no capabilities, this is indicated by cap ID,
+ * cap version and next pointer all being 0.
+ */
+ if (header == 0) {
+ break;
+ }
+
+ if (PCI_EXT_CAP_ID(header) == cap) {
+ return pos;
+ }
+
+ pos = PCI_EXT_CAP_NEXT(header);
+ if (pos < PCI_CONFIG_SPACE_SIZE) {
+ break;
+ }
+
+ max_cap--;
+ } while (max_cap > 0);
+
+ return -1;
+}
+
+int xen_host_pci_device_get(XenHostPCIDevice *d, uint16_t domain,
+ uint8_t bus, uint8_t dev, uint8_t func)
+{
+ unsigned int v;
+ int rc = 0;
+
+ d->config_fd = -1;
+ d->domain = domain;
+ d->bus = bus;
+ d->dev = dev;
+ d->func = func;
+
+ rc = xen_host_pci_config_open(d);
+ if (rc) {
+ goto error;
+ }
+ rc = xen_host_pci_get_resource(d);
+ if (rc) {
+ goto error;
+ }
+ rc = xen_host_pci_get_hex_value(d, "vendor", &v);
+ if (rc) {
+ goto error;
+ }
+ d->vendor_id = v;
+ rc = xen_host_pci_get_hex_value(d, "device", &v);
+ if (rc) {
+ goto error;
+ }
+ d->device_id = v;
+ rc = xen_host_pci_get_dec_value(d, "irq", &v);
+ if (rc) {
+ goto error;
+ }
+ d->irq = v;
+ d->is_virtfn = xen_host_pci_dev_is_virtfn(d);
+
+ return 0;
+error:
+ if (d->config_fd >= 0) {
+ close(d->config_fd);
+ d->config_fd = -1;
+ }
+ return rc;
+}
+
+void xen_host_pci_device_put(XenHostPCIDevice *d)
+{
+ if (d->config_fd >= 0) {
+ close(d->config_fd);
+ d->config_fd = -1;
+ }
+}
diff --git a/hw/xen-host-pci-device.h b/hw/xen-host-pci-device.h
new file mode 100644
index 0000000000..0079daca51
--- /dev/null
+++ b/hw/xen-host-pci-device.h
@@ -0,0 +1,55 @@
+#ifndef XEN_HOST_PCI_DEVICE_H
+#define XEN_HOST_PCI_DEVICE_H
+
+#include "pci.h"
+
+enum {
+ XEN_HOST_PCI_REGION_TYPE_IO = 1 << 1,
+ XEN_HOST_PCI_REGION_TYPE_MEM = 1 << 2,
+ XEN_HOST_PCI_REGION_TYPE_PREFETCH = 1 << 3,
+ XEN_HOST_PCI_REGION_TYPE_MEM_64 = 1 << 4,
+};
+
+typedef struct XenHostPCIIORegion {
+ pcibus_t base_addr;
+ pcibus_t size;
+ uint8_t type;
+ uint8_t bus_flags; /* Bus-specific bits */
+} XenHostPCIIORegion;
+
+typedef struct XenHostPCIDevice {
+ uint16_t domain;
+ uint8_t bus;
+ uint8_t dev;
+ uint8_t func;
+
+ uint16_t vendor_id;
+ uint16_t device_id;
+ int irq;
+
+ XenHostPCIIORegion io_regions[PCI_NUM_REGIONS - 1];
+ XenHostPCIIORegion rom;
+
+ bool is_virtfn;
+
+ int config_fd;
+} XenHostPCIDevice;
+
+int xen_host_pci_device_get(XenHostPCIDevice *d, uint16_t domain,
+ uint8_t bus, uint8_t dev, uint8_t func);
+void xen_host_pci_device_put(XenHostPCIDevice *pci_dev);
+
+int xen_host_pci_get_byte(XenHostPCIDevice *d, int pos, uint8_t *p);
+int xen_host_pci_get_word(XenHostPCIDevice *d, int pos, uint16_t *p);
+int xen_host_pci_get_long(XenHostPCIDevice *d, int pos, uint32_t *p);
+int xen_host_pci_get_block(XenHostPCIDevice *d, int pos, uint8_t *buf,
+ int len);
+int xen_host_pci_set_byte(XenHostPCIDevice *d, int pos, uint8_t data);
+int xen_host_pci_set_word(XenHostPCIDevice *d, int pos, uint16_t data);
+int xen_host_pci_set_long(XenHostPCIDevice *d, int pos, uint32_t data);
+int xen_host_pci_set_block(XenHostPCIDevice *d, int pos, uint8_t *buf,
+ int len);
+
+int xen_host_pci_find_ext_cap_offset(XenHostPCIDevice *s, uint32_t cap);
+
+#endif /* !XEN_HOST_PCI_DEVICE_H_ */
diff --git a/hw/xen_common.h b/hw/xen_common.h
index fe7f227f92..03b0bb1ea9 100644
--- a/hw/xen_common.h
+++ b/hw/xen_common.h
@@ -150,4 +150,7 @@ static inline int xen_xc_hvm_inject_msi(XenXC xen_xc, domid_t dom,
void destroy_hvm_domain(bool reboot);
+/* shutdown/destroy current domain because of an error */
+void xen_shutdown_fatal_error(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
+
#endif /* QEMU_HW_XEN_COMMON_H */
diff --git a/hw/xen_platform.c b/hw/xen_platform.c
index 0214f370b2..c1fe984f07 100644
--- a/hw/xen_platform.c
+++ b/hw/xen_platform.c
@@ -83,7 +83,7 @@ static void log_writeb(PCIXenPlatformState *s, char val)
#define UNPLUG_ALL_NICS 2
#define UNPLUG_AUX_IDE_DISKS 4
-static void unplug_nic(PCIBus *b, PCIDevice *d)
+static void unplug_nic(PCIBus *b, PCIDevice *d, void *o)
{
if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
PCI_CLASS_NETWORK_ETHERNET) {
@@ -96,10 +96,10 @@ static void unplug_nic(PCIBus *b, PCIDevice *d)
static void pci_unplug_nics(PCIBus *bus)
{
- pci_for_each_device(bus, 0, unplug_nic);
+ pci_for_each_device(bus, 0, unplug_nic, NULL);
}
-static void unplug_disks(PCIBus *b, PCIDevice *d)
+static void unplug_disks(PCIBus *b, PCIDevice *d, void *o)
{
if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
PCI_CLASS_STORAGE_IDE) {
@@ -109,7 +109,7 @@ static void unplug_disks(PCIBus *b, PCIDevice *d)
static void pci_unplug_disks(PCIBus *bus)
{
- pci_for_each_device(bus, 0, unplug_disks);
+ pci_for_each_device(bus, 0, unplug_disks, NULL);
}
static void platform_fixed_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
diff --git a/hw/xen_pt.c b/hw/xen_pt.c
new file mode 100644
index 0000000000..3b6d1867ab
--- /dev/null
+++ b/hw/xen_pt.c
@@ -0,0 +1,851 @@
+/*
+ * Copyright (c) 2007, Neocleus Corporation.
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ * Alex Novik <alex@neocleus.com>
+ * Allen Kay <allen.m.kay@intel.com>
+ * Guy Zana <guy@neocleus.com>
+ *
+ * This file implements direct PCI assignment to a HVM guest
+ */
+
+/*
+ * Interrupt Disable policy:
+ *
+ * INTx interrupt:
+ * Initialize(register_real_device)
+ * Map INTx(xc_physdev_map_pirq):
+ * <fail>
+ * - Set real Interrupt Disable bit to '1'.
+ * - Set machine_irq and assigned_device->machine_irq to '0'.
+ * * Don't bind INTx.
+ *
+ * Bind INTx(xc_domain_bind_pt_pci_irq):
+ * <fail>
+ * - Set real Interrupt Disable bit to '1'.
+ * - Unmap INTx.
+ * - Decrement xen_pt_mapped_machine_irq[machine_irq]
+ * - Set assigned_device->machine_irq to '0'.
+ *
+ * Write to Interrupt Disable bit by guest software(xen_pt_cmd_reg_write)
+ * Write '0'
+ * - Set real bit to '0' if assigned_device->machine_irq isn't '0'.
+ *
+ * Write '1'
+ * - Set real bit to '1'.
+ *
+ * MSI interrupt:
+ * Initialize MSI register(xen_pt_msi_setup, xen_pt_msi_update)
+ * Bind MSI(xc_domain_update_msi_irq)
+ * <fail>
+ * - Unmap MSI.
+ * - Set dev->msi->pirq to '-1'.
+ *
+ * MSI-X interrupt:
+ * Initialize MSI-X register(xen_pt_msix_update_one)
+ * Bind MSI-X(xc_domain_update_msi_irq)
+ * <fail>
+ * - Unmap MSI-X.
+ * - Set entry->pirq to '-1'.
+ */
+
+#include <sys/ioctl.h>
+
+#include "pci.h"
+#include "xen.h"
+#include "xen_backend.h"
+#include "xen_pt.h"
+#include "range.h"
+
+#define XEN_PT_NR_IRQS (256)
+static uint8_t xen_pt_mapped_machine_irq[XEN_PT_NR_IRQS] = {0};
+
+void xen_pt_log(const PCIDevice *d, const char *f, ...)
+{
+ va_list ap;
+
+ va_start(ap, f);
+ if (d) {
+ fprintf(stderr, "[%02x:%02x.%d] ", pci_bus_num(d->bus),
+ PCI_SLOT(d->devfn), PCI_FUNC(d->devfn));
+ }
+ vfprintf(stderr, f, ap);
+ va_end(ap);
+}
+
+/* Config Space */
+
+static int xen_pt_pci_config_access_check(PCIDevice *d, uint32_t addr, int len)
+{
+ /* check offset range */
+ if (addr >= 0xFF) {
+ XEN_PT_ERR(d, "Failed to access register with offset exceeding 0xFF. "
+ "(addr: 0x%02x, len: %d)\n", addr, len);
+ return -1;
+ }
+
+ /* check read size */
+ if ((len != 1) && (len != 2) && (len != 4)) {
+ XEN_PT_ERR(d, "Failed to access register with invalid access length. "
+ "(addr: 0x%02x, len: %d)\n", addr, len);
+ return -1;
+ }
+
+ /* check offset alignment */
+ if (addr & (len - 1)) {
+ XEN_PT_ERR(d, "Failed to access register with invalid access size "
+ "alignment. (addr: 0x%02x, len: %d)\n", addr, len);
+ return -1;
+ }
+
+ return 0;
+}
+
+int xen_pt_bar_offset_to_index(uint32_t offset)
+{
+ int index = 0;
+
+ /* check Exp ROM BAR */
+ if (offset == PCI_ROM_ADDRESS) {
+ return PCI_ROM_SLOT;
+ }
+
+ /* calculate BAR index */
+ index = (offset - PCI_BASE_ADDRESS_0) >> 2;
+ if (index >= PCI_NUM_REGIONS) {
+ return -1;
+ }
+
+ return index;
+}
+
+static uint32_t xen_pt_pci_read_config(PCIDevice *d, uint32_t addr, int len)
+{
+ XenPCIPassthroughState *s = DO_UPCAST(XenPCIPassthroughState, dev, d);
+ uint32_t val = 0;
+ XenPTRegGroup *reg_grp_entry = NULL;
+ XenPTReg *reg_entry = NULL;
+ int rc = 0;
+ int emul_len = 0;
+ uint32_t find_addr = addr;
+
+ if (xen_pt_pci_config_access_check(d, addr, len)) {
+ goto exit;
+ }
+
+ /* find register group entry */
+ reg_grp_entry = xen_pt_find_reg_grp(s, addr);
+ if (reg_grp_entry) {
+ /* check 0-Hardwired register group */
+ if (reg_grp_entry->reg_grp->grp_type == XEN_PT_GRP_TYPE_HARDWIRED) {
+ /* no need to emulate, just return 0 */
+ val = 0;
+ goto exit;
+ }
+ }
+
+ /* read I/O device register value */
+ rc = xen_host_pci_get_block(&s->real_device, addr, (uint8_t *)&val, len);
+ if (rc < 0) {
+ XEN_PT_ERR(d, "pci_read_block failed. return value: %d.\n", rc);
+ memset(&val, 0xff, len);
+ }
+
+ /* just return the I/O device register value for
+ * passthrough type register group */
+ if (reg_grp_entry == NULL) {
+ goto exit;
+ }
+
+ /* adjust the read value to appropriate CFC-CFF window */
+ val <<= (addr & 3) << 3;
+ emul_len = len;
+
+ /* loop around the guest requested size */
+ while (emul_len > 0) {
+ /* find register entry to be emulated */
+ reg_entry = xen_pt_find_reg(reg_grp_entry, find_addr);
+ if (reg_entry) {
+ XenPTRegInfo *reg = reg_entry->reg;
+ uint32_t real_offset = reg_grp_entry->base_offset + reg->offset;
+ uint32_t valid_mask = 0xFFFFFFFF >> ((4 - emul_len) << 3);
+ uint8_t *ptr_val = NULL;
+
+ valid_mask <<= (find_addr - real_offset) << 3;
+ ptr_val = (uint8_t *)&val + (real_offset & 3);
+
+ /* do emulation based on register size */
+ switch (reg->size) {
+ case 1:
+ if (reg->u.b.read) {
+ rc = reg->u.b.read(s, reg_entry, ptr_val, valid_mask);
+ }
+ break;
+ case 2:
+ if (reg->u.w.read) {
+ rc = reg->u.w.read(s, reg_entry,
+ (uint16_t *)ptr_val, valid_mask);
+ }
+ break;
+ case 4:
+ if (reg->u.dw.read) {
+ rc = reg->u.dw.read(s, reg_entry,
+ (uint32_t *)ptr_val, valid_mask);
+ }
+ break;
+ }
+
+ if (rc < 0) {
+ xen_shutdown_fatal_error("Internal error: Invalid read "
+ "emulation. (%s, rc: %d)\n",
+ __func__, rc);
+ return 0;
+ }
+
+ /* calculate next address to find */
+ emul_len -= reg->size;
+ if (emul_len > 0) {
+ find_addr = real_offset + reg->size;
+ }
+ } else {
+ /* nothing to do with passthrough type register,
+ * continue to find next byte */
+ emul_len--;
+ find_addr++;
+ }
+ }
+
+ /* need to shift back before returning them to pci bus emulator */
+ val >>= ((addr & 3) << 3);
+
+exit:
+ XEN_PT_LOG_CONFIG(d, addr, val, len);
+ return val;
+}
+
+static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr,
+ uint32_t val, int len)
+{
+ XenPCIPassthroughState *s = DO_UPCAST(XenPCIPassthroughState, dev, d);
+ int index = 0;
+ XenPTRegGroup *reg_grp_entry = NULL;
+ int rc = 0;
+ uint32_t read_val = 0;
+ int emul_len = 0;
+ XenPTReg *reg_entry = NULL;
+ uint32_t find_addr = addr;
+ XenPTRegInfo *reg = NULL;
+
+ if (xen_pt_pci_config_access_check(d, addr, len)) {
+ return;
+ }
+
+ XEN_PT_LOG_CONFIG(d, addr, val, len);
+
+ /* check unused BAR register */
+ index = xen_pt_bar_offset_to_index(addr);
+ if ((index >= 0) && (val > 0 && val < XEN_PT_BAR_ALLF) &&
+ (s->bases[index].bar_flag == XEN_PT_BAR_FLAG_UNUSED)) {
+ XEN_PT_WARN(d, "Guest attempt to set address to unused Base Address "
+ "Register. (addr: 0x%02x, len: %d)\n", addr, len);
+ }
+
+ /* find register group entry */
+ reg_grp_entry = xen_pt_find_reg_grp(s, addr);
+ if (reg_grp_entry) {
+ /* check 0-Hardwired register group */
+ if (reg_grp_entry->reg_grp->grp_type == XEN_PT_GRP_TYPE_HARDWIRED) {
+ /* ignore silently */
+ XEN_PT_WARN(d, "Access to 0-Hardwired register. "
+ "(addr: 0x%02x, len: %d)\n", addr, len);
+ return;
+ }
+ }
+
+ rc = xen_host_pci_get_block(&s->real_device, addr,
+ (uint8_t *)&read_val, len);
+ if (rc < 0) {
+ XEN_PT_ERR(d, "pci_read_block failed. return value: %d.\n", rc);
+ memset(&read_val, 0xff, len);
+ }
+
+ /* pass directly to the real device for passthrough type register group */
+ if (reg_grp_entry == NULL) {
+ goto out;
+ }
+
+ memory_region_transaction_begin();
+ pci_default_write_config(d, addr, val, len);
+
+ /* adjust the read and write value to appropriate CFC-CFF window */
+ read_val <<= (addr & 3) << 3;
+ val <<= (addr & 3) << 3;
+ emul_len = len;
+
+ /* loop around the guest requested size */
+ while (emul_len > 0) {
+ /* find register entry to be emulated */
+ reg_entry = xen_pt_find_reg(reg_grp_entry, find_addr);
+ if (reg_entry) {
+ reg = reg_entry->reg;
+ uint32_t real_offset = reg_grp_entry->base_offset + reg->offset;
+ uint32_t valid_mask = 0xFFFFFFFF >> ((4 - emul_len) << 3);
+ uint8_t *ptr_val = NULL;
+
+ valid_mask <<= (find_addr - real_offset) << 3;
+ ptr_val = (uint8_t *)&val + (real_offset & 3);
+
+ /* do emulation based on register size */
+ switch (reg->size) {
+ case 1:
+ if (reg->u.b.write) {
+ rc = reg->u.b.write(s, reg_entry, ptr_val,
+ read_val >> ((real_offset & 3) << 3),
+ valid_mask);
+ }
+ break;
+ case 2:
+ if (reg->u.w.write) {
+ rc = reg->u.w.write(s, reg_entry, (uint16_t *)ptr_val,
+ (read_val >> ((real_offset & 3) << 3)),
+ valid_mask);
+ }
+ break;
+ case 4:
+ if (reg->u.dw.write) {
+ rc = reg->u.dw.write(s, reg_entry, (uint32_t *)ptr_val,
+ (read_val >> ((real_offset & 3) << 3)),
+ valid_mask);
+ }
+ break;
+ }
+
+ if (rc < 0) {
+ xen_shutdown_fatal_error("Internal error: Invalid write"
+ " emulation. (%s, rc: %d)\n",
+ __func__, rc);
+ return;
+ }
+
+ /* calculate next address to find */
+ emul_len -= reg->size;
+ if (emul_len > 0) {
+ find_addr = real_offset + reg->size;
+ }
+ } else {
+ /* nothing to do with passthrough type register,
+ * continue to find next byte */
+ emul_len--;
+ find_addr++;
+ }
+ }
+
+ /* need to shift back before passing them to xen_host_pci_device */
+ val >>= (addr & 3) << 3;
+
+ memory_region_transaction_commit();
+
+out:
+ if (!(reg && reg->no_wb)) {
+ /* unknown regs are passed through */
+ rc = xen_host_pci_set_block(&s->real_device, addr,
+ (uint8_t *)&val, len);
+
+ if (rc < 0) {
+ XEN_PT_ERR(d, "pci_write_block failed. return value: %d.\n", rc);
+ }
+ }
+}
+
+/* register regions */
+
+static uint64_t xen_pt_bar_read(void *o, target_phys_addr_t addr,
+ unsigned size)
+{
+ PCIDevice *d = o;
+ /* if this function is called, that probably means that there is a
+ * misconfiguration of the IOMMU. */
+ XEN_PT_ERR(d, "Should not read BAR through QEMU. @0x"TARGET_FMT_plx"\n",
+ addr);
+ return 0;
+}
+static void xen_pt_bar_write(void *o, target_phys_addr_t addr, uint64_t val,
+ unsigned size)
+{
+ PCIDevice *d = o;
+ /* Same comment as xen_pt_bar_read function */
+ XEN_PT_ERR(d, "Should not write BAR through QEMU. @0x"TARGET_FMT_plx"\n",
+ addr);
+}
+
+static const MemoryRegionOps ops = {
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .read = xen_pt_bar_read,
+ .write = xen_pt_bar_write,
+};
+
+static int xen_pt_register_regions(XenPCIPassthroughState *s)
+{
+ int i = 0;
+ XenHostPCIDevice *d = &s->real_device;
+
+ /* Register PIO/MMIO BARs */
+ for (i = 0; i < PCI_ROM_SLOT; i++) {
+ XenHostPCIIORegion *r = &d->io_regions[i];
+ uint8_t type;
+
+ if (r->base_addr == 0 || r->size == 0) {
+ continue;
+ }
+
+ s->bases[i].access.u = r->base_addr;
+
+ if (r->type & XEN_HOST_PCI_REGION_TYPE_IO) {
+ type = PCI_BASE_ADDRESS_SPACE_IO;
+ } else {
+ type = PCI_BASE_ADDRESS_SPACE_MEMORY;
+ if (r->type & XEN_HOST_PCI_REGION_TYPE_PREFETCH) {
+ type |= PCI_BASE_ADDRESS_MEM_PREFETCH;
+ }
+ }
+
+ memory_region_init_io(&s->bar[i], &ops, &s->dev,
+ "xen-pci-pt-bar", r->size);
+ pci_register_bar(&s->dev, i, type, &s->bar[i]);
+
+ XEN_PT_LOG(&s->dev, "IO region %i registered (size=0x%08"PRIx64
+ " base_addr=0x%08"PRIx64" type: %#x)\n",
+ i, r->size, r->base_addr, type);
+ }
+
+ /* Register expansion ROM address */
+ if (d->rom.base_addr && d->rom.size) {
+ uint32_t bar_data = 0;
+
+ /* Re-set BAR reported by OS, otherwise ROM can't be read. */
+ if (xen_host_pci_get_long(d, PCI_ROM_ADDRESS, &bar_data)) {
+ return 0;
+ }
+ if ((bar_data & PCI_ROM_ADDRESS_MASK) == 0) {
+ bar_data |= d->rom.base_addr & PCI_ROM_ADDRESS_MASK;
+ xen_host_pci_set_long(d, PCI_ROM_ADDRESS, bar_data);
+ }
+
+ s->bases[PCI_ROM_SLOT].access.maddr = d->rom.base_addr;
+
+ memory_region_init_rom_device(&s->rom, NULL, NULL,
+ "xen-pci-pt-rom", d->rom.size);
+ pci_register_bar(&s->dev, PCI_ROM_SLOT, PCI_BASE_ADDRESS_MEM_PREFETCH,
+ &s->rom);
+
+ XEN_PT_LOG(&s->dev, "Expansion ROM registered (size=0x%08"PRIx64
+ " base_addr=0x%08"PRIx64")\n",
+ d->rom.size, d->rom.base_addr);
+ }
+
+ return 0;
+}
+
+static void xen_pt_unregister_regions(XenPCIPassthroughState *s)
+{
+ XenHostPCIDevice *d = &s->real_device;
+ int i;
+
+ for (i = 0; i < PCI_NUM_REGIONS - 1; i++) {
+ XenHostPCIIORegion *r = &d->io_regions[i];
+
+ if (r->base_addr == 0 || r->size == 0) {
+ continue;
+ }
+
+ memory_region_destroy(&s->bar[i]);
+ }
+ if (d->rom.base_addr && d->rom.size) {
+ memory_region_destroy(&s->rom);
+ }
+}
+
+/* region mapping */
+
+static int xen_pt_bar_from_region(XenPCIPassthroughState *s, MemoryRegion *mr)
+{
+ int i = 0;
+
+ for (i = 0; i < PCI_NUM_REGIONS - 1; i++) {
+ if (mr == &s->bar[i]) {
+ return i;
+ }
+ }
+ if (mr == &s->rom) {
+ return PCI_ROM_SLOT;
+ }
+ return -1;
+}
+
+/*
+ * This function checks if an io_region overlaps an io_region from another
+ * device. The io_region to check is provided with (addr, size and type)
+ * A callback can be provided and will be called for every region that is
+ * overlapped.
+ * The return value indicates if the region is overlappsed */
+struct CheckBarArgs {
+ XenPCIPassthroughState *s;
+ pcibus_t addr;
+ pcibus_t size;
+ uint8_t type;
+ bool rc;
+};
+static void xen_pt_check_bar_overlap(PCIBus *bus, PCIDevice *d, void *opaque)
+{
+ struct CheckBarArgs *arg = opaque;
+ XenPCIPassthroughState *s = arg->s;
+ uint8_t type = arg->type;
+ int i;
+
+ if (d->devfn == s->dev.devfn) {
+ return;
+ }
+
+ /* xxx: This ignores bridges. */
+ for (i = 0; i < PCI_NUM_REGIONS; i++) {
+ const PCIIORegion *r = &d->io_regions[i];
+
+ if (!r->size) {
+ continue;
+ }
+ if ((type & PCI_BASE_ADDRESS_SPACE_IO)
+ != (r->type & PCI_BASE_ADDRESS_SPACE_IO)) {
+ continue;
+ }
+
+ if (ranges_overlap(arg->addr, arg->size, r->addr, r->size)) {
+ XEN_PT_WARN(&s->dev,
+ "Overlapped to device [%02x:%02x.%d] Region: %i"
+ " (addr: %#"FMT_PCIBUS", len: %#"FMT_PCIBUS")\n",
+ pci_bus_num(bus), PCI_SLOT(d->devfn),
+ PCI_FUNC(d->devfn), i, r->addr, r->size);
+ arg->rc = true;
+ }
+ }
+}
+
+static void xen_pt_region_update(XenPCIPassthroughState *s,
+ MemoryRegionSection *sec, bool adding)
+{
+ PCIDevice *d = &s->dev;
+ MemoryRegion *mr = sec->mr;
+ int bar = -1;
+ int rc;
+ int op = adding ? DPCI_ADD_MAPPING : DPCI_REMOVE_MAPPING;
+ struct CheckBarArgs args = {
+ .s = s,
+ .addr = sec->offset_within_address_space,
+ .size = sec->size,
+ .rc = false,
+ };
+
+ bar = xen_pt_bar_from_region(s, mr);
+ if (bar == -1 && (!s->msix || &s->msix->mmio != mr)) {
+ return;
+ }
+
+ if (s->msix && &s->msix->mmio == mr) {
+ if (adding) {
+ s->msix->mmio_base_addr = sec->offset_within_address_space;
+ rc = xen_pt_msix_update_remap(s, s->msix->bar_index);
+ }
+ return;
+ }
+
+ args.type = d->io_regions[bar].type;
+ pci_for_each_device(d->bus, pci_bus_num(d->bus),
+ xen_pt_check_bar_overlap, &args);
+ if (args.rc) {
+ XEN_PT_WARN(d, "Region: %d (addr: %#"FMT_PCIBUS
+ ", len: %#"FMT_PCIBUS") is overlapped.\n",
+ bar, sec->offset_within_address_space, sec->size);
+ }
+
+ if (d->io_regions[bar].type & PCI_BASE_ADDRESS_SPACE_IO) {
+ uint32_t guest_port = sec->offset_within_address_space;
+ uint32_t machine_port = s->bases[bar].access.pio_base;
+ uint32_t size = sec->size;
+ rc = xc_domain_ioport_mapping(xen_xc, xen_domid,
+ guest_port, machine_port, size,
+ op);
+ if (rc) {
+ XEN_PT_ERR(d, "%s ioport mapping failed! (rc: %i)\n",
+ adding ? "create new" : "remove old", rc);
+ }
+ } else {
+ pcibus_t guest_addr = sec->offset_within_address_space;
+ pcibus_t machine_addr = s->bases[bar].access.maddr
+ + sec->offset_within_region;
+ pcibus_t size = sec->size;
+ rc = xc_domain_memory_mapping(xen_xc, xen_domid,
+ XEN_PFN(guest_addr + XC_PAGE_SIZE - 1),
+ XEN_PFN(machine_addr + XC_PAGE_SIZE - 1),
+ XEN_PFN(size + XC_PAGE_SIZE - 1),
+ op);
+ if (rc) {
+ XEN_PT_ERR(d, "%s mem mapping failed! (rc: %i)\n",
+ adding ? "create new" : "remove old", rc);
+ }
+ }
+}
+
+static void xen_pt_begin(MemoryListener *l)
+{
+}
+
+static void xen_pt_commit(MemoryListener *l)
+{
+}
+
+static void xen_pt_region_add(MemoryListener *l, MemoryRegionSection *sec)
+{
+ XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState,
+ memory_listener);
+
+ xen_pt_region_update(s, sec, true);
+}
+
+static void xen_pt_region_del(MemoryListener *l, MemoryRegionSection *sec)
+{
+ XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState,
+ memory_listener);
+
+ xen_pt_region_update(s, sec, false);
+}
+
+static void xen_pt_region_nop(MemoryListener *l, MemoryRegionSection *s)
+{
+}
+
+static void xen_pt_log_fns(MemoryListener *l, MemoryRegionSection *s)
+{
+}
+
+static void xen_pt_log_global_fns(MemoryListener *l)
+{
+}
+
+static void xen_pt_eventfd_fns(MemoryListener *l, MemoryRegionSection *s,
+ bool match_data, uint64_t data, int fd)
+{
+}
+
+static const MemoryListener xen_pt_memory_listener = {
+ .begin = xen_pt_begin,
+ .commit = xen_pt_commit,
+ .region_add = xen_pt_region_add,
+ .region_nop = xen_pt_region_nop,
+ .region_del = xen_pt_region_del,
+ .log_start = xen_pt_log_fns,
+ .log_stop = xen_pt_log_fns,
+ .log_sync = xen_pt_log_fns,
+ .log_global_start = xen_pt_log_global_fns,
+ .log_global_stop = xen_pt_log_global_fns,
+ .eventfd_add = xen_pt_eventfd_fns,
+ .eventfd_del = xen_pt_eventfd_fns,
+ .priority = 10,
+};
+
+/* init */
+
+static int xen_pt_initfn(PCIDevice *d)
+{
+ XenPCIPassthroughState *s = DO_UPCAST(XenPCIPassthroughState, dev, d);
+ int rc = 0;
+ uint8_t machine_irq = 0;
+ int pirq = XEN_PT_UNASSIGNED_PIRQ;
+
+ /* register real device */
+ XEN_PT_LOG(d, "Assigning real physical device %02x:%02x.%d"
+ " to devfn %#x\n",
+ s->hostaddr.bus, s->hostaddr.slot, s->hostaddr.function,
+ s->dev.devfn);
+
+ rc = xen_host_pci_device_get(&s->real_device,
+ s->hostaddr.domain, s->hostaddr.bus,
+ s->hostaddr.slot, s->hostaddr.function);
+ if (rc) {
+ XEN_PT_ERR(d, "Failed to \"open\" the real pci device. rc: %i\n", rc);
+ return -1;
+ }
+
+ s->is_virtfn = s->real_device.is_virtfn;
+ if (s->is_virtfn) {
+ XEN_PT_LOG(d, "%04x:%02x:%02x.%d is a SR-IOV Virtual Function\n",
+ s->real_device.domain, bus, slot, func);
+ }
+
+ /* Initialize virtualized PCI configuration (Extended 256 Bytes) */
+ if (xen_host_pci_get_block(&s->real_device, 0, d->config,
+ PCI_CONFIG_SPACE_SIZE) == -1) {
+ xen_host_pci_device_put(&s->real_device);
+ return -1;
+ }
+
+ s->memory_listener = xen_pt_memory_listener;
+
+ /* Handle real device's MMIO/PIO BARs */
+ xen_pt_register_regions(s);
+
+ /* reinitialize each config register to be emulated */
+ if (xen_pt_config_init(s)) {
+ XEN_PT_ERR(d, "PCI Config space initialisation failed.\n");
+ xen_host_pci_device_put(&s->real_device);
+ return -1;
+ }
+
+ /* Bind interrupt */
+ if (!s->dev.config[PCI_INTERRUPT_PIN]) {
+ XEN_PT_LOG(d, "no pin interrupt\n");
+ goto out;
+ }
+
+ machine_irq = s->real_device.irq;
+ rc = xc_physdev_map_pirq(xen_xc, xen_domid, machine_irq, &pirq);
+
+ if (rc < 0) {
+ XEN_PT_ERR(d, "Mapping machine irq %u to pirq %i failed, (rc: %d)\n",
+ machine_irq, pirq, rc);
+
+ /* Disable PCI intx assertion (turn on bit10 of devctl) */
+ xen_host_pci_set_word(&s->real_device,
+ PCI_COMMAND,
+ pci_get_word(s->dev.config + PCI_COMMAND)
+ | PCI_COMMAND_INTX_DISABLE);
+ machine_irq = 0;
+ s->machine_irq = 0;
+ } else {
+ machine_irq = pirq;
+ s->machine_irq = pirq;
+ xen_pt_mapped_machine_irq[machine_irq]++;
+ }
+
+ /* bind machine_irq to device */
+ if (machine_irq != 0) {
+ uint8_t e_intx = xen_pt_pci_intx(s);
+
+ rc = xc_domain_bind_pt_pci_irq(xen_xc, xen_domid, machine_irq,
+ pci_bus_num(d->bus),
+ PCI_SLOT(d->devfn),
+ e_intx);
+ if (rc < 0) {
+ XEN_PT_ERR(d, "Binding of interrupt %i failed! (rc: %d)\n",
+ e_intx, rc);
+
+ /* Disable PCI intx assertion (turn on bit10 of devctl) */
+ xen_host_pci_set_word(&s->real_device, PCI_COMMAND,
+ *(uint16_t *)(&s->dev.config[PCI_COMMAND])
+ | PCI_COMMAND_INTX_DISABLE);
+ xen_pt_mapped_machine_irq[machine_irq]--;
+
+ if (xen_pt_mapped_machine_irq[machine_irq] == 0) {
+ if (xc_physdev_unmap_pirq(xen_xc, xen_domid, machine_irq)) {
+ XEN_PT_ERR(d, "Unmapping of machine interrupt %i failed!"
+ " (rc: %d)\n", machine_irq, rc);
+ }
+ }
+ s->machine_irq = 0;
+ }
+ }
+
+out:
+ memory_listener_register(&s->memory_listener, NULL);
+ XEN_PT_LOG(d, "Real physical device %02x:%02x.%d registered successfuly!\n",
+ bus, slot, func);
+
+ return 0;
+}
+
+static int xen_pt_unregister_device(PCIDevice *d)
+{
+ XenPCIPassthroughState *s = DO_UPCAST(XenPCIPassthroughState, dev, d);
+ uint8_t machine_irq = s->machine_irq;
+ uint8_t intx = xen_pt_pci_intx(s);
+ int rc;
+
+ if (machine_irq) {
+ rc = xc_domain_unbind_pt_irq(xen_xc, xen_domid, machine_irq,
+ PT_IRQ_TYPE_PCI,
+ pci_bus_num(d->bus),
+ PCI_SLOT(s->dev.devfn),
+ intx,
+ 0 /* isa_irq */);
+ if (rc < 0) {
+ XEN_PT_ERR(d, "unbinding of interrupt INT%c failed."
+ " (machine irq: %i, rc: %d)"
+ " But bravely continuing on..\n",
+ 'a' + intx, machine_irq, rc);
+ }
+ }
+
+ if (s->msi) {
+ xen_pt_msi_disable(s);
+ }
+ if (s->msix) {
+ xen_pt_msix_disable(s);
+ }
+
+ if (machine_irq) {
+ xen_pt_mapped_machine_irq[machine_irq]--;
+
+ if (xen_pt_mapped_machine_irq[machine_irq] == 0) {
+ rc = xc_physdev_unmap_pirq(xen_xc, xen_domid, machine_irq);
+
+ if (rc < 0) {
+ XEN_PT_ERR(d, "unmapping of interrupt %i failed. (rc: %d)"
+ " But bravely continuing on..\n",
+ machine_irq, rc);
+ }
+ }
+ }
+
+ /* delete all emulated config registers */
+ xen_pt_config_delete(s);
+
+ xen_pt_unregister_regions(s);
+ memory_listener_unregister(&s->memory_listener);
+
+ xen_host_pci_device_put(&s->real_device);
+
+ return 0;
+}
+
+static Property xen_pci_passthrough_properties[] = {
+ DEFINE_PROP_PCI_HOST_DEVADDR("hostaddr", XenPCIPassthroughState, hostaddr),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void xen_pci_passthrough_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ k->init = xen_pt_initfn;
+ k->exit = xen_pt_unregister_device;
+ k->config_read = xen_pt_pci_read_config;
+ k->config_write = xen_pt_pci_write_config;
+ dc->desc = "Assign an host PCI device with Xen";
+ dc->props = xen_pci_passthrough_properties;
+};
+
+static TypeInfo xen_pci_passthrough_info = {
+ .name = "xen-pci-passthrough",
+ .parent = TYPE_PCI_DEVICE,
+ .instance_size = sizeof(XenPCIPassthroughState),
+ .class_init = xen_pci_passthrough_class_init,
+};
+
+static void xen_pci_passthrough_register_types(void)
+{
+ type_register_static(&xen_pci_passthrough_info);
+}
+
+type_init(xen_pci_passthrough_register_types)
diff --git a/hw/xen_pt.h b/hw/xen_pt.h
new file mode 100644
index 0000000000..41904ece93
--- /dev/null
+++ b/hw/xen_pt.h
@@ -0,0 +1,301 @@
+#ifndef XEN_PT_H
+#define XEN_PT_H
+
+#include "qemu-common.h"
+#include "xen_common.h"
+#include "pci.h"
+#include "xen-host-pci-device.h"
+
+void xen_pt_log(const PCIDevice *d, const char *f, ...) GCC_FMT_ATTR(2, 3);
+
+#define XEN_PT_ERR(d, _f, _a...) xen_pt_log(d, "%s: Error: "_f, __func__, ##_a)
+
+#ifdef XEN_PT_LOGGING_ENABLED
+# define XEN_PT_LOG(d, _f, _a...) xen_pt_log(d, "%s: " _f, __func__, ##_a)
+# define XEN_PT_WARN(d, _f, _a...) \
+ xen_pt_log(d, "%s: Warning: "_f, __func__, ##_a)
+#else
+# define XEN_PT_LOG(d, _f, _a...)
+# define XEN_PT_WARN(d, _f, _a...)
+#endif
+
+#ifdef XEN_PT_DEBUG_PCI_CONFIG_ACCESS
+# define XEN_PT_LOG_CONFIG(d, addr, val, len) \
+ xen_pt_log(d, "%s: address=0x%04x val=0x%08x len=%d\n", \
+ __func__, addr, val, len)
+#else
+# define XEN_PT_LOG_CONFIG(d, addr, val, len)
+#endif
+
+
+/* Helper */
+#define XEN_PFN(x) ((x) >> XC_PAGE_SHIFT)
+
+typedef struct XenPTRegInfo XenPTRegInfo;
+typedef struct XenPTReg XenPTReg;
+
+typedef struct XenPCIPassthroughState XenPCIPassthroughState;
+
+/* function type for config reg */
+typedef int (*xen_pt_conf_reg_init)
+ (XenPCIPassthroughState *, XenPTRegInfo *, uint32_t real_offset,
+ uint32_t *data);
+typedef int (*xen_pt_conf_dword_write)
+ (XenPCIPassthroughState *, XenPTReg *cfg_entry,
+ uint32_t *val, uint32_t dev_value, uint32_t valid_mask);
+typedef int (*xen_pt_conf_word_write)
+ (XenPCIPassthroughState *, XenPTReg *cfg_entry,
+ uint16_t *val, uint16_t dev_value, uint16_t valid_mask);
+typedef int (*xen_pt_conf_byte_write)
+ (XenPCIPassthroughState *, XenPTReg *cfg_entry,
+ uint8_t *val, uint8_t dev_value, uint8_t valid_mask);
+typedef int (*xen_pt_conf_dword_read)
+ (XenPCIPassthroughState *, XenPTReg *cfg_entry,
+ uint32_t *val, uint32_t valid_mask);
+typedef int (*xen_pt_conf_word_read)
+ (XenPCIPassthroughState *, XenPTReg *cfg_entry,
+ uint16_t *val, uint16_t valid_mask);
+typedef int (*xen_pt_conf_byte_read)
+ (XenPCIPassthroughState *, XenPTReg *cfg_entry,
+ uint8_t *val, uint8_t valid_mask);
+
+#define XEN_PT_BAR_ALLF 0xFFFFFFFF
+#define XEN_PT_BAR_UNMAPPED (-1)
+
+#define PCI_CAP_MAX 48
+
+
+typedef enum {
+ XEN_PT_GRP_TYPE_HARDWIRED = 0, /* 0 Hardwired reg group */
+ XEN_PT_GRP_TYPE_EMU, /* emul reg group */
+} XenPTRegisterGroupType;
+
+typedef enum {
+ XEN_PT_BAR_FLAG_MEM = 0, /* Memory type BAR */
+ XEN_PT_BAR_FLAG_IO, /* I/O type BAR */
+ XEN_PT_BAR_FLAG_UPPER, /* upper 64bit BAR */
+ XEN_PT_BAR_FLAG_UNUSED, /* unused BAR */
+} XenPTBarFlag;
+
+
+typedef struct XenPTRegion {
+ /* BAR flag */
+ XenPTBarFlag bar_flag;
+ /* Translation of the emulated address */
+ union {
+ uint64_t maddr;
+ uint64_t pio_base;
+ uint64_t u;
+ } access;
+} XenPTRegion;
+
+/* XenPTRegInfo declaration
+ * - only for emulated register (either a part or whole bit).
+ * - for passthrough register that need special behavior (like interacting with
+ * other component), set emu_mask to all 0 and specify r/w func properly.
+ * - do NOT use ALL F for init_val, otherwise the tbl will not be registered.
+ */
+
+/* emulated register infomation */
+struct XenPTRegInfo {
+ uint32_t offset;
+ uint32_t size;
+ uint32_t init_val;
+ /* reg read only field mask (ON:RO/ROS, OFF:other) */
+ uint32_t ro_mask;
+ /* reg emulate field mask (ON:emu, OFF:passthrough) */
+ uint32_t emu_mask;
+ /* no write back allowed */
+ uint32_t no_wb;
+ xen_pt_conf_reg_init init;
+ /* read/write function pointer
+ * for double_word/word/byte size */
+ union {
+ struct {
+ xen_pt_conf_dword_write write;
+ xen_pt_conf_dword_read read;
+ } dw;
+ struct {
+ xen_pt_conf_word_write write;
+ xen_pt_conf_word_read read;
+ } w;
+ struct {
+ xen_pt_conf_byte_write write;
+ xen_pt_conf_byte_read read;
+ } b;
+ } u;
+};
+
+/* emulated register management */
+struct XenPTReg {
+ QLIST_ENTRY(XenPTReg) entries;
+ XenPTRegInfo *reg;
+ uint32_t data; /* emulated value */
+};
+
+typedef struct XenPTRegGroupInfo XenPTRegGroupInfo;
+
+/* emul reg group size initialize method */
+typedef int (*xen_pt_reg_size_init_fn)
+ (XenPCIPassthroughState *, const XenPTRegGroupInfo *,
+ uint32_t base_offset, uint8_t *size);
+
+/* emulated register group infomation */
+struct XenPTRegGroupInfo {
+ uint8_t grp_id;
+ XenPTRegisterGroupType grp_type;
+ uint8_t grp_size;
+ xen_pt_reg_size_init_fn size_init;
+ XenPTRegInfo *emu_regs;
+};
+
+/* emul register group management table */
+typedef struct XenPTRegGroup {
+ QLIST_ENTRY(XenPTRegGroup) entries;
+ const XenPTRegGroupInfo *reg_grp;
+ uint32_t base_offset;
+ uint8_t size;
+ QLIST_HEAD(, XenPTReg) reg_tbl_list;
+} XenPTRegGroup;
+
+
+#define XEN_PT_UNASSIGNED_PIRQ (-1)
+typedef struct XenPTMSI {
+ uint16_t flags;
+ uint32_t addr_lo; /* guest message address */
+ uint32_t addr_hi; /* guest message upper address */
+ uint16_t data; /* guest message data */
+ uint32_t ctrl_offset; /* saved control offset */
+ int pirq; /* guest pirq corresponding */
+ bool initialized; /* when guest MSI is initialized */
+ bool mapped; /* when pirq is mapped */
+} XenPTMSI;
+
+typedef struct XenPTMSIXEntry {
+ int pirq;
+ uint64_t addr;
+ uint32_t data;
+ uint32_t vector_ctrl;
+ bool updated; /* indicate whether MSI ADDR or DATA is updated */
+} XenPTMSIXEntry;
+typedef struct XenPTMSIX {
+ uint32_t ctrl_offset;
+ bool enabled;
+ int total_entries;
+ int bar_index;
+ uint64_t table_base;
+ uint32_t table_offset_adjust; /* page align mmap */
+ uint64_t mmio_base_addr;
+ MemoryRegion mmio;
+ void *phys_iomem_base;
+ XenPTMSIXEntry msix_entry[0];
+} XenPTMSIX;
+
+struct XenPCIPassthroughState {
+ PCIDevice dev;
+
+ PCIHostDeviceAddress hostaddr;
+ bool is_virtfn;
+ XenHostPCIDevice real_device;
+ XenPTRegion bases[PCI_NUM_REGIONS]; /* Access regions */
+ QLIST_HEAD(, XenPTRegGroup) reg_grps;
+
+ uint32_t machine_irq;
+
+ XenPTMSI *msi;
+ XenPTMSIX *msix;
+
+ MemoryRegion bar[PCI_NUM_REGIONS - 1];
+ MemoryRegion rom;
+
+ MemoryListener memory_listener;
+};
+
+int xen_pt_config_init(XenPCIPassthroughState *s);
+void xen_pt_config_delete(XenPCIPassthroughState *s);
+XenPTRegGroup *xen_pt_find_reg_grp(XenPCIPassthroughState *s, uint32_t address);
+XenPTReg *xen_pt_find_reg(XenPTRegGroup *reg_grp, uint32_t address);
+int xen_pt_bar_offset_to_index(uint32_t offset);
+
+static inline pcibus_t xen_pt_get_emul_size(XenPTBarFlag flag, pcibus_t r_size)
+{
+ /* align resource size (memory type only) */
+ if (flag == XEN_PT_BAR_FLAG_MEM) {
+ return (r_size + XC_PAGE_SIZE - 1) & XC_PAGE_MASK;
+ } else {
+ return r_size;
+ }
+}
+
+/* INTx */
+/* The PCI Local Bus Specification, Rev. 3.0,
+ * Section 6.2.4 Miscellaneous Registers, pp 223
+ * outlines 5 valid values for the interrupt pin (intx).
+ * 0: For devices (or device functions) that don't use an interrupt in
+ * 1: INTA#
+ * 2: INTB#
+ * 3: INTC#
+ * 4: INTD#
+ *
+ * Xen uses the following 4 values for intx
+ * 0: INTA#
+ * 1: INTB#
+ * 2: INTC#
+ * 3: INTD#
+ *
+ * Observing that these list of values are not the same, xen_pt_pci_read_intx()
+ * uses the following mapping from hw to xen values.
+ * This seems to reflect the current usage within Xen.
+ *
+ * PCI hardware | Xen | Notes
+ * ----------------+-----+----------------------------------------------------
+ * 0 | 0 | No interrupt
+ * 1 | 0 | INTA#
+ * 2 | 1 | INTB#
+ * 3 | 2 | INTC#
+ * 4 | 3 | INTD#
+ * any other value | 0 | This should never happen, log error message
+ */
+
+static inline uint8_t xen_pt_pci_read_intx(XenPCIPassthroughState *s)
+{
+ uint8_t v = 0;
+ xen_host_pci_get_byte(&s->real_device, PCI_INTERRUPT_PIN, &v);
+ return v;
+}
+
+static inline uint8_t xen_pt_pci_intx(XenPCIPassthroughState *s)
+{
+ uint8_t r_val = xen_pt_pci_read_intx(s);
+
+ XEN_PT_LOG(&s->dev, "intx=%i\n", r_val);
+ if (r_val < 1 || r_val > 4) {
+ XEN_PT_LOG(&s->dev, "Interrupt pin read from hardware is out of range:"
+ " value=%i, acceptable range is 1 - 4\n", r_val);
+ r_val = 0;
+ } else {
+ r_val -= 1;
+ }
+
+ return r_val;
+}
+
+/* MSI/MSI-X */
+int xen_pt_msi_set_enable(XenPCIPassthroughState *s, bool en);
+int xen_pt_msi_setup(XenPCIPassthroughState *s);
+int xen_pt_msi_update(XenPCIPassthroughState *d);
+void xen_pt_msi_disable(XenPCIPassthroughState *s);
+
+int xen_pt_msix_init(XenPCIPassthroughState *s, uint32_t base);
+void xen_pt_msix_delete(XenPCIPassthroughState *s);
+int xen_pt_msix_update(XenPCIPassthroughState *s);
+int xen_pt_msix_update_remap(XenPCIPassthroughState *s, int bar_index);
+void xen_pt_msix_disable(XenPCIPassthroughState *s);
+
+static inline bool xen_pt_has_msix_mapping(XenPCIPassthroughState *s, int bar)
+{
+ return s->msix && s->msix->bar_index == bar;
+}
+
+
+#endif /* !XEN_PT_H */
diff --git a/hw/xen_pt_config_init.c b/hw/xen_pt_config_init.c
new file mode 100644
index 0000000000..00eb3d997d
--- /dev/null
+++ b/hw/xen_pt_config_init.c
@@ -0,0 +1,1869 @@
+/*
+ * Copyright (c) 2007, Neocleus Corporation.
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ * Alex Novik <alex@neocleus.com>
+ * Allen Kay <allen.m.kay@intel.com>
+ * Guy Zana <guy@neocleus.com>
+ *
+ * This file implements direct PCI assignment to a HVM guest
+ */
+
+#include "qemu-timer.h"
+#include "xen_backend.h"
+#include "xen_pt.h"
+
+#define XEN_PT_MERGE_VALUE(value, data, val_mask) \
+ (((value) & (val_mask)) | ((data) & ~(val_mask)))
+
+#define XEN_PT_INVALID_REG 0xFFFFFFFF /* invalid register value */
+
+/* prototype */
+
+static int xen_pt_ptr_reg_init(XenPCIPassthroughState *s, XenPTRegInfo *reg,
+ uint32_t real_offset, uint32_t *data);
+
+
+/* helper */
+
+/* A return value of 1 means the capability should NOT be exposed to guest. */
+static int xen_pt_hide_dev_cap(const XenHostPCIDevice *d, uint8_t grp_id)
+{
+ switch (grp_id) {
+ case PCI_CAP_ID_EXP:
+ /* The PCI Express Capability Structure of the VF of Intel 82599 10GbE
+ * Controller looks trivial, e.g., the PCI Express Capabilities
+ * Register is 0. We should not try to expose it to guest.
+ *
+ * The datasheet is available at
+ * http://download.intel.com/design/network/datashts/82599_datasheet.pdf
+ *
+ * See 'Table 9.7. VF PCIe Configuration Space' of the datasheet, the
+ * PCI Express Capability Structure of the VF of Intel 82599 10GbE
+ * Controller looks trivial, e.g., the PCI Express Capabilities
+ * Register is 0, so the Capability Version is 0 and
+ * xen_pt_pcie_size_init() would fail.
+ */
+ if (d->vendor_id == PCI_VENDOR_ID_INTEL &&
+ d->device_id == PCI_DEVICE_ID_INTEL_82599_SFP_VF) {
+ return 1;
+ }
+ break;
+ }
+ return 0;
+}
+
+/* find emulate register group entry */
+XenPTRegGroup *xen_pt_find_reg_grp(XenPCIPassthroughState *s, uint32_t address)
+{
+ XenPTRegGroup *entry = NULL;
+
+ /* find register group entry */
+ QLIST_FOREACH(entry, &s->reg_grps, entries) {
+ /* check address */
+ if ((entry->base_offset <= address)
+ && ((entry->base_offset + entry->size) > address)) {
+ return entry;
+ }
+ }
+
+ /* group entry not found */
+ return NULL;
+}
+
+/* find emulate register entry */
+XenPTReg *xen_pt_find_reg(XenPTRegGroup *reg_grp, uint32_t address)
+{
+ XenPTReg *reg_entry = NULL;
+ XenPTRegInfo *reg = NULL;
+ uint32_t real_offset = 0;
+
+ /* find register entry */
+ QLIST_FOREACH(reg_entry, &reg_grp->reg_tbl_list, entries) {
+ reg = reg_entry->reg;
+ real_offset = reg_grp->base_offset + reg->offset;
+ /* check address */
+ if ((real_offset <= address)
+ && ((real_offset + reg->size) > address)) {
+ return reg_entry;
+ }
+ }
+
+ return NULL;
+}
+
+
+/****************
+ * general register functions
+ */
+
+/* register initialization function */
+
+static int xen_pt_common_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ *data = reg->init_val;
+ return 0;
+}
+
+/* Read register functions */
+
+static int xen_pt_byte_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint8_t *value, uint8_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint8_t valid_emu_mask = 0;
+
+ /* emulate byte register */
+ valid_emu_mask = reg->emu_mask & valid_mask;
+ *value = XEN_PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
+
+ return 0;
+}
+static int xen_pt_word_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t valid_emu_mask = 0;
+
+ /* emulate word register */
+ valid_emu_mask = reg->emu_mask & valid_mask;
+ *value = XEN_PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
+
+ return 0;
+}
+static int xen_pt_long_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t *value, uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t valid_emu_mask = 0;
+
+ /* emulate long register */
+ valid_emu_mask = reg->emu_mask & valid_mask;
+ *value = XEN_PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
+
+ return 0;
+}
+
+/* Write register functions */
+
+static int xen_pt_byte_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint8_t *val, uint8_t dev_value,
+ uint8_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint8_t writable_mask = 0;
+ uint8_t throughable_mask = 0;
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
+
+ return 0;
+}
+static int xen_pt_word_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *val, uint16_t dev_value,
+ uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
+
+ return 0;
+}
+static int xen_pt_long_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t *val, uint32_t dev_value,
+ uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t writable_mask = 0;
+ uint32_t throughable_mask = 0;
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
+
+ return 0;
+}
+
+
+/* XenPTRegInfo declaration
+ * - only for emulated register (either a part or whole bit).
+ * - for passthrough register that need special behavior (like interacting with
+ * other component), set emu_mask to all 0 and specify r/w func properly.
+ * - do NOT use ALL F for init_val, otherwise the tbl will not be registered.
+ */
+
+/********************
+ * Header Type0
+ */
+
+static int xen_pt_vendor_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ *data = s->real_device.vendor_id;
+ return 0;
+}
+static int xen_pt_device_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ *data = s->real_device.device_id;
+ return 0;
+}
+static int xen_pt_status_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ XenPTRegGroup *reg_grp_entry = NULL;
+ XenPTReg *reg_entry = NULL;
+ uint32_t reg_field = 0;
+
+ /* find Header register group */
+ reg_grp_entry = xen_pt_find_reg_grp(s, PCI_CAPABILITY_LIST);
+ if (reg_grp_entry) {
+ /* find Capabilities Pointer register */
+ reg_entry = xen_pt_find_reg(reg_grp_entry, PCI_CAPABILITY_LIST);
+ if (reg_entry) {
+ /* check Capabilities Pointer register */
+ if (reg_entry->data) {
+ reg_field |= PCI_STATUS_CAP_LIST;
+ } else {
+ reg_field &= ~PCI_STATUS_CAP_LIST;
+ }
+ } else {
+ xen_shutdown_fatal_error("Internal error: Couldn't find XenPTReg*"
+ " for Capabilities Pointer register."
+ " (%s)\n", __func__);
+ return -1;
+ }
+ } else {
+ xen_shutdown_fatal_error("Internal error: Couldn't find XenPTRegGroup"
+ " for Header. (%s)\n", __func__);
+ return -1;
+ }
+
+ *data = reg_field;
+ return 0;
+}
+static int xen_pt_header_type_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ /* read PCI_HEADER_TYPE */
+ *data = reg->init_val | 0x80;
+ return 0;
+}
+
+/* initialize Interrupt Pin register */
+static int xen_pt_irqpin_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ *data = xen_pt_pci_read_intx(s);
+ return 0;
+}
+
+/* Command register */
+static int xen_pt_cmd_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t valid_emu_mask = 0;
+ uint16_t emu_mask = reg->emu_mask;
+
+ if (s->is_virtfn) {
+ emu_mask |= PCI_COMMAND_MEMORY;
+ }
+
+ /* emulate word register */
+ valid_emu_mask = emu_mask & valid_mask;
+ *value = XEN_PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
+
+ return 0;
+}
+static int xen_pt_cmd_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *val, uint16_t dev_value,
+ uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+ uint16_t emu_mask = reg->emu_mask;
+
+ if (s->is_virtfn) {
+ emu_mask |= PCI_COMMAND_MEMORY;
+ }
+
+ /* modify emulate register */
+ writable_mask = ~reg->ro_mask & valid_mask;
+ cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~emu_mask & valid_mask;
+
+ if (*val & PCI_COMMAND_INTX_DISABLE) {
+ throughable_mask |= PCI_COMMAND_INTX_DISABLE;
+ } else {
+ if (s->machine_irq) {
+ throughable_mask |= PCI_COMMAND_INTX_DISABLE;
+ }
+ }
+
+ *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
+
+ return 0;
+}
+
+/* BAR */
+#define XEN_PT_BAR_MEM_RO_MASK 0x0000000F /* BAR ReadOnly mask(Memory) */
+#define XEN_PT_BAR_MEM_EMU_MASK 0xFFFFFFF0 /* BAR emul mask(Memory) */
+#define XEN_PT_BAR_IO_RO_MASK 0x00000003 /* BAR ReadOnly mask(I/O) */
+#define XEN_PT_BAR_IO_EMU_MASK 0xFFFFFFFC /* BAR emul mask(I/O) */
+
+static XenPTBarFlag xen_pt_bar_reg_parse(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg)
+{
+ PCIDevice *d = &s->dev;
+ XenPTRegion *region = NULL;
+ PCIIORegion *r;
+ int index = 0;
+
+ /* check 64bit BAR */
+ index = xen_pt_bar_offset_to_index(reg->offset);
+ if ((0 < index) && (index < PCI_ROM_SLOT)) {
+ int type = s->real_device.io_regions[index - 1].type;
+
+ if ((type & XEN_HOST_PCI_REGION_TYPE_MEM)
+ && (type & XEN_HOST_PCI_REGION_TYPE_MEM_64)) {
+ region = &s->bases[index - 1];
+ if (region->bar_flag != XEN_PT_BAR_FLAG_UPPER) {
+ return XEN_PT_BAR_FLAG_UPPER;
+ }
+ }
+ }
+
+ /* check unused BAR */
+ r = &d->io_regions[index];
+ if (r->size == 0) {
+ return XEN_PT_BAR_FLAG_UNUSED;
+ }
+
+ /* for ExpROM BAR */
+ if (index == PCI_ROM_SLOT) {
+ return XEN_PT_BAR_FLAG_MEM;
+ }
+
+ /* check BAR I/O indicator */
+ if (s->real_device.io_regions[index].type & XEN_HOST_PCI_REGION_TYPE_IO) {
+ return XEN_PT_BAR_FLAG_IO;
+ } else {
+ return XEN_PT_BAR_FLAG_MEM;
+ }
+}
+
+static inline uint32_t base_address_with_flags(XenHostPCIIORegion *hr)
+{
+ if (hr->type & XEN_HOST_PCI_REGION_TYPE_IO) {
+ return hr->base_addr | (hr->bus_flags & ~PCI_BASE_ADDRESS_IO_MASK);
+ } else {
+ return hr->base_addr | (hr->bus_flags & ~PCI_BASE_ADDRESS_MEM_MASK);
+ }
+}
+
+static int xen_pt_bar_reg_init(XenPCIPassthroughState *s, XenPTRegInfo *reg,
+ uint32_t real_offset, uint32_t *data)
+{
+ uint32_t reg_field = 0;
+ int index;
+
+ index = xen_pt_bar_offset_to_index(reg->offset);
+ if (index < 0 || index >= PCI_NUM_REGIONS) {
+ XEN_PT_ERR(&s->dev, "Internal error: Invalid BAR index [%d].\n", index);
+ return -1;
+ }
+
+ /* set BAR flag */
+ s->bases[index].bar_flag = xen_pt_bar_reg_parse(s, reg);
+ if (s->bases[index].bar_flag == XEN_PT_BAR_FLAG_UNUSED) {
+ reg_field = XEN_PT_INVALID_REG;
+ }
+
+ *data = reg_field;
+ return 0;
+}
+static int xen_pt_bar_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t *value, uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t valid_emu_mask = 0;
+ uint32_t bar_emu_mask = 0;
+ int index;
+
+ /* get BAR index */
+ index = xen_pt_bar_offset_to_index(reg->offset);
+ if (index < 0 || index >= PCI_NUM_REGIONS) {
+ XEN_PT_ERR(&s->dev, "Internal error: Invalid BAR index [%d].\n", index);
+ return -1;
+ }
+
+ /* use fixed-up value from kernel sysfs */
+ *value = base_address_with_flags(&s->real_device.io_regions[index]);
+
+ /* set emulate mask depend on BAR flag */
+ switch (s->bases[index].bar_flag) {
+ case XEN_PT_BAR_FLAG_MEM:
+ bar_emu_mask = XEN_PT_BAR_MEM_EMU_MASK;
+ break;
+ case XEN_PT_BAR_FLAG_IO:
+ bar_emu_mask = XEN_PT_BAR_IO_EMU_MASK;
+ break;
+ case XEN_PT_BAR_FLAG_UPPER:
+ bar_emu_mask = XEN_PT_BAR_ALLF;
+ break;
+ default:
+ break;
+ }
+
+ /* emulate BAR */
+ valid_emu_mask = bar_emu_mask & valid_mask;
+ *value = XEN_PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
+
+ return 0;
+}
+static int xen_pt_bar_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t *val, uint32_t dev_value,
+ uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ XenPTRegion *base = NULL;
+ PCIDevice *d = &s->dev;
+ const PCIIORegion *r;
+ uint32_t writable_mask = 0;
+ uint32_t throughable_mask = 0;
+ uint32_t bar_emu_mask = 0;
+ uint32_t bar_ro_mask = 0;
+ uint32_t r_size = 0;
+ int index = 0;
+
+ index = xen_pt_bar_offset_to_index(reg->offset);
+ if (index < 0 || index >= PCI_NUM_REGIONS) {
+ XEN_PT_ERR(d, "Internal error: Invalid BAR index [%d].\n", index);
+ return -1;
+ }
+
+ r = &d->io_regions[index];
+ base = &s->bases[index];
+ r_size = xen_pt_get_emul_size(base->bar_flag, r->size);
+
+ /* set emulate mask and read-only mask values depend on the BAR flag */
+ switch (s->bases[index].bar_flag) {
+ case XEN_PT_BAR_FLAG_MEM:
+ bar_emu_mask = XEN_PT_BAR_MEM_EMU_MASK;
+ bar_ro_mask = XEN_PT_BAR_MEM_RO_MASK | (r_size - 1);
+ break;
+ case XEN_PT_BAR_FLAG_IO:
+ bar_emu_mask = XEN_PT_BAR_IO_EMU_MASK;
+ bar_ro_mask = XEN_PT_BAR_IO_RO_MASK | (r_size - 1);
+ break;
+ case XEN_PT_BAR_FLAG_UPPER:
+ bar_emu_mask = XEN_PT_BAR_ALLF;
+ bar_ro_mask = 0; /* all upper 32bit are R/W */
+ break;
+ default:
+ break;
+ }
+
+ /* modify emulate register */
+ writable_mask = bar_emu_mask & ~bar_ro_mask & valid_mask;
+ cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
+
+ /* check whether we need to update the virtual region address or not */
+ switch (s->bases[index].bar_flag) {
+ case XEN_PT_BAR_FLAG_MEM:
+ /* nothing to do */
+ break;
+ case XEN_PT_BAR_FLAG_IO:
+ /* nothing to do */
+ break;
+ case XEN_PT_BAR_FLAG_UPPER:
+ if (cfg_entry->data) {
+ if (cfg_entry->data != (XEN_PT_BAR_ALLF & ~bar_ro_mask)) {
+ XEN_PT_WARN(d, "Guest attempt to set high MMIO Base Address. "
+ "Ignore mapping. "
+ "(offset: 0x%02x, high address: 0x%08x)\n",
+ reg->offset, cfg_entry->data);
+ }
+ }
+ break;
+ default:
+ break;
+ }
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~bar_emu_mask & valid_mask;
+ *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
+
+ return 0;
+}
+
+/* write Exp ROM BAR */
+static int xen_pt_exp_rom_bar_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint32_t *val,
+ uint32_t dev_value, uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ XenPTRegion *base = NULL;
+ PCIDevice *d = (PCIDevice *)&s->dev;
+ uint32_t writable_mask = 0;
+ uint32_t throughable_mask = 0;
+ pcibus_t r_size = 0;
+ uint32_t bar_emu_mask = 0;
+ uint32_t bar_ro_mask = 0;
+
+ r_size = d->io_regions[PCI_ROM_SLOT].size;
+ base = &s->bases[PCI_ROM_SLOT];
+ /* align memory type resource size */
+ r_size = xen_pt_get_emul_size(base->bar_flag, r_size);
+
+ /* set emulate mask and read-only mask */
+ bar_emu_mask = reg->emu_mask;
+ bar_ro_mask = (reg->ro_mask | (r_size - 1)) & ~PCI_ROM_ADDRESS_ENABLE;
+
+ /* modify emulate register */
+ writable_mask = ~bar_ro_mask & valid_mask;
+ cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~bar_emu_mask & valid_mask;
+ *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
+
+ return 0;
+}
+
+/* Header Type0 reg static infomation table */
+static XenPTRegInfo xen_pt_emu_reg_header0[] = {
+ /* Vendor ID reg */
+ {
+ .offset = PCI_VENDOR_ID,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFFFF,
+ .emu_mask = 0xFFFF,
+ .init = xen_pt_vendor_reg_init,
+ .u.w.read = xen_pt_word_reg_read,
+ .u.w.write = xen_pt_word_reg_write,
+ },
+ /* Device ID reg */
+ {
+ .offset = PCI_DEVICE_ID,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFFFF,
+ .emu_mask = 0xFFFF,
+ .init = xen_pt_device_reg_init,
+ .u.w.read = xen_pt_word_reg_read,
+ .u.w.write = xen_pt_word_reg_write,
+ },
+ /* Command reg */
+ {
+ .offset = PCI_COMMAND,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xF880,
+ .emu_mask = 0x0740,
+ .init = xen_pt_common_reg_init,
+ .u.w.read = xen_pt_cmd_reg_read,
+ .u.w.write = xen_pt_cmd_reg_write,
+ },
+ /* Capabilities Pointer reg */
+ {
+ .offset = PCI_CAPABILITY_LIST,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = xen_pt_ptr_reg_init,
+ .u.b.read = xen_pt_byte_reg_read,
+ .u.b.write = xen_pt_byte_reg_write,
+ },
+ /* Status reg */
+ /* use emulated Cap Ptr value to initialize,
+ * so need to be declared after Cap Ptr reg
+ */
+ {
+ .offset = PCI_STATUS,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0x06FF,
+ .emu_mask = 0x0010,
+ .init = xen_pt_status_reg_init,
+ .u.w.read = xen_pt_word_reg_read,
+ .u.w.write = xen_pt_word_reg_write,
+ },
+ /* Cache Line Size reg */
+ {
+ .offset = PCI_CACHE_LINE_SIZE,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0x00,
+ .emu_mask = 0xFF,
+ .init = xen_pt_common_reg_init,
+ .u.b.read = xen_pt_byte_reg_read,
+ .u.b.write = xen_pt_byte_reg_write,
+ },
+ /* Latency Timer reg */
+ {
+ .offset = PCI_LATENCY_TIMER,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0x00,
+ .emu_mask = 0xFF,
+ .init = xen_pt_common_reg_init,
+ .u.b.read = xen_pt_byte_reg_read,
+ .u.b.write = xen_pt_byte_reg_write,
+ },
+ /* Header Type reg */
+ {
+ .offset = PCI_HEADER_TYPE,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0x00,
+ .init = xen_pt_header_type_reg_init,
+ .u.b.read = xen_pt_byte_reg_read,
+ .u.b.write = xen_pt_byte_reg_write,
+ },
+ /* Interrupt Line reg */
+ {
+ .offset = PCI_INTERRUPT_LINE,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0x00,
+ .emu_mask = 0xFF,
+ .init = xen_pt_common_reg_init,
+ .u.b.read = xen_pt_byte_reg_read,
+ .u.b.write = xen_pt_byte_reg_write,
+ },
+ /* Interrupt Pin reg */
+ {
+ .offset = PCI_INTERRUPT_PIN,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = xen_pt_irqpin_reg_init,
+ .u.b.read = xen_pt_byte_reg_read,
+ .u.b.write = xen_pt_byte_reg_write,
+ },
+ /* BAR 0 reg */
+ /* mask of BAR need to be decided later, depends on IO/MEM type */
+ {
+ .offset = PCI_BASE_ADDRESS_0,
+ .size = 4,
+ .init_val = 0x00000000,
+ .init = xen_pt_bar_reg_init,
+ .u.dw.read = xen_pt_bar_reg_read,
+ .u.dw.write = xen_pt_bar_reg_write,
+ },
+ /* BAR 1 reg */
+ {
+ .offset = PCI_BASE_ADDRESS_1,
+ .size = 4,
+ .init_val = 0x00000000,
+ .init = xen_pt_bar_reg_init,
+ .u.dw.read = xen_pt_bar_reg_read,
+ .u.dw.write = xen_pt_bar_reg_write,
+ },
+ /* BAR 2 reg */
+ {
+ .offset = PCI_BASE_ADDRESS_2,
+ .size = 4,
+ .init_val = 0x00000000,
+ .init = xen_pt_bar_reg_init,
+ .u.dw.read = xen_pt_bar_reg_read,
+ .u.dw.write = xen_pt_bar_reg_write,
+ },
+ /* BAR 3 reg */
+ {
+ .offset = PCI_BASE_ADDRESS_3,
+ .size = 4,
+ .init_val = 0x00000000,
+ .init = xen_pt_bar_reg_init,
+ .u.dw.read = xen_pt_bar_reg_read,
+ .u.dw.write = xen_pt_bar_reg_write,
+ },
+ /* BAR 4 reg */
+ {
+ .offset = PCI_BASE_ADDRESS_4,
+ .size = 4,
+ .init_val = 0x00000000,
+ .init = xen_pt_bar_reg_init,
+ .u.dw.read = xen_pt_bar_reg_read,
+ .u.dw.write = xen_pt_bar_reg_write,
+ },
+ /* BAR 5 reg */
+ {
+ .offset = PCI_BASE_ADDRESS_5,
+ .size = 4,
+ .init_val = 0x00000000,
+ .init = xen_pt_bar_reg_init,
+ .u.dw.read = xen_pt_bar_reg_read,
+ .u.dw.write = xen_pt_bar_reg_write,
+ },
+ /* Expansion ROM BAR reg */
+ {
+ .offset = PCI_ROM_ADDRESS,
+ .size = 4,
+ .init_val = 0x00000000,
+ .ro_mask = 0x000007FE,
+ .emu_mask = 0xFFFFF800,
+ .init = xen_pt_bar_reg_init,
+ .u.dw.read = xen_pt_long_reg_read,
+ .u.dw.write = xen_pt_exp_rom_bar_reg_write,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/*********************************
+ * Vital Product Data Capability
+ */
+
+/* Vital Product Data Capability Structure reg static infomation table */
+static XenPTRegInfo xen_pt_emu_reg_vpd[] = {
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = xen_pt_ptr_reg_init,
+ .u.b.read = xen_pt_byte_reg_read,
+ .u.b.write = xen_pt_byte_reg_write,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/**************************************
+ * Vendor Specific Capability
+ */
+
+/* Vendor Specific Capability Structure reg static infomation table */
+static XenPTRegInfo xen_pt_emu_reg_vendor[] = {
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = xen_pt_ptr_reg_init,
+ .u.b.read = xen_pt_byte_reg_read,
+ .u.b.write = xen_pt_byte_reg_write,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/*****************************
+ * PCI Express Capability
+ */
+
+static inline uint8_t get_capability_version(XenPCIPassthroughState *s,
+ uint32_t offset)
+{
+ uint8_t flags = pci_get_byte(s->dev.config + offset + PCI_EXP_FLAGS);
+ return flags & PCI_EXP_FLAGS_VERS;
+}
+
+static inline uint8_t get_device_type(XenPCIPassthroughState *s,
+ uint32_t offset)
+{
+ uint8_t flags = pci_get_byte(s->dev.config + offset + PCI_EXP_FLAGS);
+ return (flags & PCI_EXP_FLAGS_TYPE) >> 4;
+}
+
+/* initialize Link Control register */
+static int xen_pt_linkctrl_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ uint8_t cap_ver = get_capability_version(s, real_offset - reg->offset);
+ uint8_t dev_type = get_device_type(s, real_offset - reg->offset);
+
+ /* no need to initialize in case of Root Complex Integrated Endpoint
+ * with cap_ver 1.x
+ */
+ if ((dev_type == PCI_EXP_TYPE_RC_END) && (cap_ver == 1)) {
+ *data = XEN_PT_INVALID_REG;
+ }
+
+ *data = reg->init_val;
+ return 0;
+}
+/* initialize Device Control 2 register */
+static int xen_pt_devctrl2_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ uint8_t cap_ver = get_capability_version(s, real_offset - reg->offset);
+
+ /* no need to initialize in case of cap_ver 1.x */
+ if (cap_ver == 1) {
+ *data = XEN_PT_INVALID_REG;
+ }
+
+ *data = reg->init_val;
+ return 0;
+}
+/* initialize Link Control 2 register */
+static int xen_pt_linkctrl2_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ uint8_t cap_ver = get_capability_version(s, real_offset - reg->offset);
+ uint32_t reg_field = 0;
+
+ /* no need to initialize in case of cap_ver 1.x */
+ if (cap_ver == 1) {
+ reg_field = XEN_PT_INVALID_REG;
+ } else {
+ /* set Supported Link Speed */
+ uint8_t lnkcap = pci_get_byte(s->dev.config + real_offset - reg->offset
+ + PCI_EXP_LNKCAP);
+ reg_field |= PCI_EXP_LNKCAP_SLS & lnkcap;
+ }
+
+ *data = reg_field;
+ return 0;
+}
+
+/* PCI Express Capability Structure reg static infomation table */
+static XenPTRegInfo xen_pt_emu_reg_pcie[] = {
+ /* Next Pointer reg */
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = xen_pt_ptr_reg_init,
+ .u.b.read = xen_pt_byte_reg_read,
+ .u.b.write = xen_pt_byte_reg_write,
+ },
+ /* Device Capabilities reg */
+ {
+ .offset = PCI_EXP_DEVCAP,
+ .size = 4,
+ .init_val = 0x00000000,
+ .ro_mask = 0x1FFCFFFF,
+ .emu_mask = 0x10000000,
+ .init = xen_pt_common_reg_init,
+ .u.dw.read = xen_pt_long_reg_read,
+ .u.dw.write = xen_pt_long_reg_write,
+ },
+ /* Device Control reg */
+ {
+ .offset = PCI_EXP_DEVCTL,
+ .size = 2,
+ .init_val = 0x2810,
+ .ro_mask = 0x8400,
+ .emu_mask = 0xFFFF,
+ .init = xen_pt_common_reg_init,
+ .u.w.read = xen_pt_word_reg_read,
+ .u.w.write = xen_pt_word_reg_write,
+ },
+ /* Link Control reg */
+ {
+ .offset = PCI_EXP_LNKCTL,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFC34,
+ .emu_mask = 0xFFFF,
+ .init = xen_pt_linkctrl_reg_init,
+ .u.w.read = xen_pt_word_reg_read,
+ .u.w.write = xen_pt_word_reg_write,
+ },
+ /* Device Control 2 reg */
+ {
+ .offset = 0x28,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFFE0,
+ .emu_mask = 0xFFFF,
+ .init = xen_pt_devctrl2_reg_init,
+ .u.w.read = xen_pt_word_reg_read,
+ .u.w.write = xen_pt_word_reg_write,
+ },
+ /* Link Control 2 reg */
+ {
+ .offset = 0x30,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xE040,
+ .emu_mask = 0xFFFF,
+ .init = xen_pt_linkctrl2_reg_init,
+ .u.w.read = xen_pt_word_reg_read,
+ .u.w.write = xen_pt_word_reg_write,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/*********************************
+ * Power Management Capability
+ */
+
+/* read Power Management Control/Status register */
+static int xen_pt_pmcsr_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t valid_emu_mask = reg->emu_mask;
+
+ valid_emu_mask |= PCI_PM_CTRL_STATE_MASK | PCI_PM_CTRL_NO_SOFT_RESET;
+
+ valid_emu_mask = valid_emu_mask & valid_mask;
+ *value = XEN_PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
+
+ return 0;
+}
+/* write Power Management Control/Status register */
+static int xen_pt_pmcsr_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint16_t *val,
+ uint16_t dev_value, uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t emu_mask = reg->emu_mask;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+
+ emu_mask |= PCI_PM_CTRL_STATE_MASK | PCI_PM_CTRL_NO_SOFT_RESET;
+
+ /* modify emulate register */
+ writable_mask = emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~emu_mask & valid_mask;
+ *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
+
+ return 0;
+}
+
+/* Power Management Capability reg static infomation table */
+static XenPTRegInfo xen_pt_emu_reg_pm[] = {
+ /* Next Pointer reg */
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = xen_pt_ptr_reg_init,
+ .u.b.read = xen_pt_byte_reg_read,
+ .u.b.write = xen_pt_byte_reg_write,
+ },
+ /* Power Management Capabilities reg */
+ {
+ .offset = PCI_CAP_FLAGS,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFFFF,
+ .emu_mask = 0xF9C8,
+ .init = xen_pt_common_reg_init,
+ .u.w.read = xen_pt_word_reg_read,
+ .u.w.write = xen_pt_word_reg_write,
+ },
+ /* PCI Power Management Control/Status reg */
+ {
+ .offset = PCI_PM_CTRL,
+ .size = 2,
+ .init_val = 0x0008,
+ .ro_mask = 0xE1FC,
+ .emu_mask = 0x8100,
+ .init = xen_pt_common_reg_init,
+ .u.w.read = xen_pt_pmcsr_reg_read,
+ .u.w.write = xen_pt_pmcsr_reg_write,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/********************************
+ * MSI Capability
+ */
+
+/* Helper */
+static bool xen_pt_msgdata_check_type(uint32_t offset, uint16_t flags)
+{
+ /* check the offset whether matches the type or not */
+ bool is_32 = (offset == PCI_MSI_DATA_32) && !(flags & PCI_MSI_FLAGS_64BIT);
+ bool is_64 = (offset == PCI_MSI_DATA_64) && (flags & PCI_MSI_FLAGS_64BIT);
+ return is_32 || is_64;
+}
+
+/* Message Control register */
+static int xen_pt_msgctrl_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ PCIDevice *d = &s->dev;
+ XenPTMSI *msi = s->msi;
+ uint16_t reg_field = 0;
+
+ /* use I/O device register's value as initial value */
+ reg_field = pci_get_word(d->config + real_offset);
+
+ if (reg_field & PCI_MSI_FLAGS_ENABLE) {
+ XEN_PT_LOG(&s->dev, "MSI already enabled, disabling it first\n");
+ xen_host_pci_set_word(&s->real_device, real_offset,
+ reg_field & ~PCI_MSI_FLAGS_ENABLE);
+ }
+ msi->flags |= reg_field;
+ msi->ctrl_offset = real_offset;
+ msi->initialized = false;
+ msi->mapped = false;
+
+ *data = reg->init_val;
+ return 0;
+}
+static int xen_pt_msgctrl_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint16_t *val,
+ uint16_t dev_value, uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ XenPTMSI *msi = s->msi;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+ uint16_t raw_val;
+
+ /* Currently no support for multi-vector */
+ if (*val & PCI_MSI_FLAGS_QSIZE) {
+ XEN_PT_WARN(&s->dev, "Tries to set more than 1 vector ctrl %x\n", *val);
+ }
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
+ msi->flags |= cfg_entry->data & ~PCI_MSI_FLAGS_ENABLE;
+
+ /* create value for writing to I/O device register */
+ raw_val = *val;
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
+
+ /* update MSI */
+ if (raw_val & PCI_MSI_FLAGS_ENABLE) {
+ /* setup MSI pirq for the first time */
+ if (!msi->initialized) {
+ /* Init physical one */
+ XEN_PT_LOG(&s->dev, "setup MSI\n");
+ if (xen_pt_msi_setup(s)) {
+ /* We do not broadcast the error to the framework code, so
+ * that MSI errors are contained in MSI emulation code and
+ * QEMU can go on running.
+ * Guest MSI would be actually not working.
+ */
+ *val &= ~PCI_MSI_FLAGS_ENABLE;
+ XEN_PT_WARN(&s->dev, "Can not map MSI.\n");
+ return 0;
+ }
+ if (xen_pt_msi_update(s)) {
+ *val &= ~PCI_MSI_FLAGS_ENABLE;
+ XEN_PT_WARN(&s->dev, "Can not bind MSI\n");
+ return 0;
+ }
+ msi->initialized = true;
+ msi->mapped = true;
+ }
+ msi->flags |= PCI_MSI_FLAGS_ENABLE;
+ } else {
+ msi->flags &= ~PCI_MSI_FLAGS_ENABLE;
+ }
+
+ /* pass through MSI_ENABLE bit */
+ *val &= ~PCI_MSI_FLAGS_ENABLE;
+ *val |= raw_val & PCI_MSI_FLAGS_ENABLE;
+
+ return 0;
+}
+
+/* initialize Message Upper Address register */
+static int xen_pt_msgaddr64_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ /* no need to initialize in case of 32 bit type */
+ if (!(s->msi->flags & PCI_MSI_FLAGS_64BIT)) {
+ *data = XEN_PT_INVALID_REG;
+ } else {
+ *data = reg->init_val;
+ }
+
+ return 0;
+}
+/* this function will be called twice (for 32 bit and 64 bit type) */
+/* initialize Message Data register */
+static int xen_pt_msgdata_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ uint32_t flags = s->msi->flags;
+ uint32_t offset = reg->offset;
+
+ /* check the offset whether matches the type or not */
+ if (xen_pt_msgdata_check_type(offset, flags)) {
+ *data = reg->init_val;
+ } else {
+ *data = XEN_PT_INVALID_REG;
+ }
+ return 0;
+}
+
+/* write Message Address register */
+static int xen_pt_msgaddr32_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint32_t *val,
+ uint32_t dev_value, uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t writable_mask = 0;
+ uint32_t throughable_mask = 0;
+ uint32_t old_addr = cfg_entry->data;
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
+ s->msi->addr_lo = cfg_entry->data;
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
+
+ /* update MSI */
+ if (cfg_entry->data != old_addr) {
+ if (s->msi->mapped) {
+ xen_pt_msi_update(s);
+ }
+ }
+
+ return 0;
+}
+/* write Message Upper Address register */
+static int xen_pt_msgaddr64_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint32_t *val,
+ uint32_t dev_value, uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t writable_mask = 0;
+ uint32_t throughable_mask = 0;
+ uint32_t old_addr = cfg_entry->data;
+
+ /* check whether the type is 64 bit or not */
+ if (!(s->msi->flags & PCI_MSI_FLAGS_64BIT)) {
+ XEN_PT_ERR(&s->dev,
+ "Can't write to the upper address without 64 bit support\n");
+ return -1;
+ }
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
+ /* update the msi_info too */
+ s->msi->addr_hi = cfg_entry->data;
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
+
+ /* update MSI */
+ if (cfg_entry->data != old_addr) {
+ if (s->msi->mapped) {
+ xen_pt_msi_update(s);
+ }
+ }
+
+ return 0;
+}
+
+
+/* this function will be called twice (for 32 bit and 64 bit type) */
+/* write Message Data register */
+static int xen_pt_msgdata_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint16_t *val,
+ uint16_t dev_value, uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ XenPTMSI *msi = s->msi;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+ uint16_t old_data = cfg_entry->data;
+ uint32_t offset = reg->offset;
+
+ /* check the offset whether matches the type or not */
+ if (!xen_pt_msgdata_check_type(offset, msi->flags)) {
+ /* exit I/O emulator */
+ XEN_PT_ERR(&s->dev, "the offset does not match the 32/64 bit type!\n");
+ return -1;
+ }
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
+ /* update the msi_info too */
+ msi->data = cfg_entry->data;
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
+
+ /* update MSI */
+ if (cfg_entry->data != old_data) {
+ if (msi->mapped) {
+ xen_pt_msi_update(s);
+ }
+ }
+
+ return 0;
+}
+
+/* MSI Capability Structure reg static infomation table */
+static XenPTRegInfo xen_pt_emu_reg_msi[] = {
+ /* Next Pointer reg */
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = xen_pt_ptr_reg_init,
+ .u.b.read = xen_pt_byte_reg_read,
+ .u.b.write = xen_pt_byte_reg_write,
+ },
+ /* Message Control reg */
+ {
+ .offset = PCI_MSI_FLAGS,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFF8E,
+ .emu_mask = 0x007F,
+ .init = xen_pt_msgctrl_reg_init,
+ .u.w.read = xen_pt_word_reg_read,
+ .u.w.write = xen_pt_msgctrl_reg_write,
+ },
+ /* Message Address reg */
+ {
+ .offset = PCI_MSI_ADDRESS_LO,
+ .size = 4,
+ .init_val = 0x00000000,
+ .ro_mask = 0x00000003,
+ .emu_mask = 0xFFFFFFFF,
+ .no_wb = 1,
+ .init = xen_pt_common_reg_init,
+ .u.dw.read = xen_pt_long_reg_read,
+ .u.dw.write = xen_pt_msgaddr32_reg_write,
+ },
+ /* Message Upper Address reg (if PCI_MSI_FLAGS_64BIT set) */
+ {
+ .offset = PCI_MSI_ADDRESS_HI,
+ .size = 4,
+ .init_val = 0x00000000,
+ .ro_mask = 0x00000000,
+ .emu_mask = 0xFFFFFFFF,
+ .no_wb = 1,
+ .init = xen_pt_msgaddr64_reg_init,
+ .u.dw.read = xen_pt_long_reg_read,
+ .u.dw.write = xen_pt_msgaddr64_reg_write,
+ },
+ /* Message Data reg (16 bits of data for 32-bit devices) */
+ {
+ .offset = PCI_MSI_DATA_32,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0x0000,
+ .emu_mask = 0xFFFF,
+ .no_wb = 1,
+ .init = xen_pt_msgdata_reg_init,
+ .u.w.read = xen_pt_word_reg_read,
+ .u.w.write = xen_pt_msgdata_reg_write,
+ },
+ /* Message Data reg (16 bits of data for 64-bit devices) */
+ {
+ .offset = PCI_MSI_DATA_64,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0x0000,
+ .emu_mask = 0xFFFF,
+ .no_wb = 1,
+ .init = xen_pt_msgdata_reg_init,
+ .u.w.read = xen_pt_word_reg_read,
+ .u.w.write = xen_pt_msgdata_reg_write,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/**************************************
+ * MSI-X Capability
+ */
+
+/* Message Control register for MSI-X */
+static int xen_pt_msixctrl_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ PCIDevice *d = &s->dev;
+ uint16_t reg_field = 0;
+
+ /* use I/O device register's value as initial value */
+ reg_field = pci_get_word(d->config + real_offset);
+
+ if (reg_field & PCI_MSIX_FLAGS_ENABLE) {
+ XEN_PT_LOG(d, "MSIX already enabled, disabling it first\n");
+ xen_host_pci_set_word(&s->real_device, real_offset,
+ reg_field & ~PCI_MSIX_FLAGS_ENABLE);
+ }
+
+ s->msix->ctrl_offset = real_offset;
+
+ *data = reg->init_val;
+ return 0;
+}
+static int xen_pt_msixctrl_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint16_t *val,
+ uint16_t dev_value, uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+ int debug_msix_enabled_old;
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
+
+ /* update MSI-X */
+ if ((*val & PCI_MSIX_FLAGS_ENABLE)
+ && !(*val & PCI_MSIX_FLAGS_MASKALL)) {
+ xen_pt_msix_update(s);
+ }
+
+ debug_msix_enabled_old = s->msix->enabled;
+ s->msix->enabled = !!(*val & PCI_MSIX_FLAGS_ENABLE);
+ if (s->msix->enabled != debug_msix_enabled_old) {
+ XEN_PT_LOG(&s->dev, "%s MSI-X\n",
+ s->msix->enabled ? "enable" : "disable");
+ }
+
+ return 0;
+}
+
+/* MSI-X Capability Structure reg static infomation table */
+static XenPTRegInfo xen_pt_emu_reg_msix[] = {
+ /* Next Pointer reg */
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = xen_pt_ptr_reg_init,
+ .u.b.read = xen_pt_byte_reg_read,
+ .u.b.write = xen_pt_byte_reg_write,
+ },
+ /* Message Control reg */
+ {
+ .offset = PCI_MSI_FLAGS,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0x3FFF,
+ .emu_mask = 0x0000,
+ .init = xen_pt_msixctrl_reg_init,
+ .u.w.read = xen_pt_word_reg_read,
+ .u.w.write = xen_pt_msixctrl_reg_write,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/****************************
+ * Capabilities
+ */
+
+/* capability structure register group size functions */
+
+static int xen_pt_reg_grp_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset, uint8_t *size)
+{
+ *size = grp_reg->grp_size;
+ return 0;
+}
+/* get Vendor Specific Capability Structure register group size */
+static int xen_pt_vendor_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset, uint8_t *size)
+{
+ *size = pci_get_byte(s->dev.config + base_offset + 0x02);
+ return 0;
+}
+/* get PCI Express Capability Structure register group size */
+static int xen_pt_pcie_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset, uint8_t *size)
+{
+ PCIDevice *d = &s->dev;
+ uint8_t version = get_capability_version(s, base_offset);
+ uint8_t type = get_device_type(s, base_offset);
+ uint8_t pcie_size = 0;
+
+
+ /* calculate size depend on capability version and device/port type */
+ /* in case of PCI Express Base Specification Rev 1.x */
+ if (version == 1) {
+ /* The PCI Express Capabilities, Device Capabilities, and Device
+ * Status/Control registers are required for all PCI Express devices.
+ * The Link Capabilities and Link Status/Control are required for all
+ * Endpoints that are not Root Complex Integrated Endpoints. Endpoints
+ * are not required to implement registers other than those listed
+ * above and terminate the capability structure.
+ */
+ switch (type) {
+ case PCI_EXP_TYPE_ENDPOINT:
+ case PCI_EXP_TYPE_LEG_END:
+ pcie_size = 0x14;
+ break;
+ case PCI_EXP_TYPE_RC_END:
+ /* has no link */
+ pcie_size = 0x0C;
+ break;
+ /* only EndPoint passthrough is supported */
+ case PCI_EXP_TYPE_ROOT_PORT:
+ case PCI_EXP_TYPE_UPSTREAM:
+ case PCI_EXP_TYPE_DOWNSTREAM:
+ case PCI_EXP_TYPE_PCI_BRIDGE:
+ case PCI_EXP_TYPE_PCIE_BRIDGE:
+ case PCI_EXP_TYPE_RC_EC:
+ default:
+ XEN_PT_ERR(d, "Unsupported device/port type %#x.\n", type);
+ return -1;
+ }
+ }
+ /* in case of PCI Express Base Specification Rev 2.0 */
+ else if (version == 2) {
+ switch (type) {
+ case PCI_EXP_TYPE_ENDPOINT:
+ case PCI_EXP_TYPE_LEG_END:
+ case PCI_EXP_TYPE_RC_END:
+ /* For Functions that do not implement the registers,
+ * these spaces must be hardwired to 0b.
+ */
+ pcie_size = 0x3C;
+ break;
+ /* only EndPoint passthrough is supported */
+ case PCI_EXP_TYPE_ROOT_PORT:
+ case PCI_EXP_TYPE_UPSTREAM:
+ case PCI_EXP_TYPE_DOWNSTREAM:
+ case PCI_EXP_TYPE_PCI_BRIDGE:
+ case PCI_EXP_TYPE_PCIE_BRIDGE:
+ case PCI_EXP_TYPE_RC_EC:
+ default:
+ XEN_PT_ERR(d, "Unsupported device/port type %#x.\n", type);
+ return -1;
+ }
+ } else {
+ XEN_PT_ERR(d, "Unsupported capability version %#x.\n", version);
+ return -1;
+ }
+
+ *size = pcie_size;
+ return 0;
+}
+/* get MSI Capability Structure register group size */
+static int xen_pt_msi_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset, uint8_t *size)
+{
+ PCIDevice *d = &s->dev;
+ uint16_t msg_ctrl = 0;
+ uint8_t msi_size = 0xa;
+
+ msg_ctrl = pci_get_word(d->config + (base_offset + PCI_MSI_FLAGS));
+
+ /* check if 64-bit address is capable of per-vector masking */
+ if (msg_ctrl & PCI_MSI_FLAGS_64BIT) {
+ msi_size += 4;
+ }
+ if (msg_ctrl & PCI_MSI_FLAGS_MASKBIT) {
+ msi_size += 10;
+ }
+
+ s->msi = g_new0(XenPTMSI, 1);
+ s->msi->pirq = XEN_PT_UNASSIGNED_PIRQ;
+
+ *size = msi_size;
+ return 0;
+}
+/* get MSI-X Capability Structure register group size */
+static int xen_pt_msix_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset, uint8_t *size)
+{
+ int rc = 0;
+
+ rc = xen_pt_msix_init(s, base_offset);
+
+ if (rc < 0) {
+ XEN_PT_ERR(&s->dev, "Internal error: Invalid xen_pt_msix_init.\n");
+ return rc;
+ }
+
+ *size = grp_reg->grp_size;
+ return 0;
+}
+
+
+static const XenPTRegGroupInfo xen_pt_emu_reg_grps[] = {
+ /* Header Type0 reg group */
+ {
+ .grp_id = 0xFF,
+ .grp_type = XEN_PT_GRP_TYPE_EMU,
+ .grp_size = 0x40,
+ .size_init = xen_pt_reg_grp_size_init,
+ .emu_regs = xen_pt_emu_reg_header0,
+ },
+ /* PCI PowerManagement Capability reg group */
+ {
+ .grp_id = PCI_CAP_ID_PM,
+ .grp_type = XEN_PT_GRP_TYPE_EMU,
+ .grp_size = PCI_PM_SIZEOF,
+ .size_init = xen_pt_reg_grp_size_init,
+ .emu_regs = xen_pt_emu_reg_pm,
+ },
+ /* AGP Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_AGP,
+ .grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
+ .grp_size = 0x30,
+ .size_init = xen_pt_reg_grp_size_init,
+ },
+ /* Vital Product Data Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_VPD,
+ .grp_type = XEN_PT_GRP_TYPE_EMU,
+ .grp_size = 0x08,
+ .size_init = xen_pt_reg_grp_size_init,
+ .emu_regs = xen_pt_emu_reg_vpd,
+ },
+ /* Slot Identification reg group */
+ {
+ .grp_id = PCI_CAP_ID_SLOTID,
+ .grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
+ .grp_size = 0x04,
+ .size_init = xen_pt_reg_grp_size_init,
+ },
+ /* MSI Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_MSI,
+ .grp_type = XEN_PT_GRP_TYPE_EMU,
+ .grp_size = 0xFF,
+ .size_init = xen_pt_msi_size_init,
+ .emu_regs = xen_pt_emu_reg_msi,
+ },
+ /* PCI-X Capabilities List Item reg group */
+ {
+ .grp_id = PCI_CAP_ID_PCIX,
+ .grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
+ .grp_size = 0x18,
+ .size_init = xen_pt_reg_grp_size_init,
+ },
+ /* Vendor Specific Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_VNDR,
+ .grp_type = XEN_PT_GRP_TYPE_EMU,
+ .grp_size = 0xFF,
+ .size_init = xen_pt_vendor_size_init,
+ .emu_regs = xen_pt_emu_reg_vendor,
+ },
+ /* SHPC Capability List Item reg group */
+ {
+ .grp_id = PCI_CAP_ID_SHPC,
+ .grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
+ .grp_size = 0x08,
+ .size_init = xen_pt_reg_grp_size_init,
+ },
+ /* Subsystem ID and Subsystem Vendor ID Capability List Item reg group */
+ {
+ .grp_id = PCI_CAP_ID_SSVID,
+ .grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
+ .grp_size = 0x08,
+ .size_init = xen_pt_reg_grp_size_init,
+ },
+ /* AGP 8x Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_AGP3,
+ .grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
+ .grp_size = 0x30,
+ .size_init = xen_pt_reg_grp_size_init,
+ },
+ /* PCI Express Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_EXP,
+ .grp_type = XEN_PT_GRP_TYPE_EMU,
+ .grp_size = 0xFF,
+ .size_init = xen_pt_pcie_size_init,
+ .emu_regs = xen_pt_emu_reg_pcie,
+ },
+ /* MSI-X Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_MSIX,
+ .grp_type = XEN_PT_GRP_TYPE_EMU,
+ .grp_size = 0x0C,
+ .size_init = xen_pt_msix_size_init,
+ .emu_regs = xen_pt_emu_reg_msix,
+ },
+ {
+ .grp_size = 0,
+ },
+};
+
+/* initialize Capabilities Pointer or Next Pointer register */
+static int xen_pt_ptr_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ int i;
+ uint8_t *config = s->dev.config;
+ uint32_t reg_field = pci_get_byte(config + real_offset);
+ uint8_t cap_id = 0;
+
+ /* find capability offset */
+ while (reg_field) {
+ for (i = 0; xen_pt_emu_reg_grps[i].grp_size != 0; i++) {
+ if (xen_pt_hide_dev_cap(&s->real_device,
+ xen_pt_emu_reg_grps[i].grp_id)) {
+ continue;
+ }
+
+ cap_id = pci_get_byte(config + reg_field + PCI_CAP_LIST_ID);
+ if (xen_pt_emu_reg_grps[i].grp_id == cap_id) {
+ if (xen_pt_emu_reg_grps[i].grp_type == XEN_PT_GRP_TYPE_EMU) {
+ goto out;
+ }
+ /* ignore the 0 hardwired capability, find next one */
+ break;
+ }
+ }
+
+ /* next capability */
+ reg_field = pci_get_byte(config + reg_field + PCI_CAP_LIST_NEXT);
+ }
+
+out:
+ *data = reg_field;
+ return 0;
+}
+
+
+/*************
+ * Main
+ */
+
+static uint8_t find_cap_offset(XenPCIPassthroughState *s, uint8_t cap)
+{
+ uint8_t id;
+ unsigned max_cap = PCI_CAP_MAX;
+ uint8_t pos = PCI_CAPABILITY_LIST;
+ uint8_t status = 0;
+
+ if (xen_host_pci_get_byte(&s->real_device, PCI_STATUS, &status)) {
+ return 0;
+ }
+ if ((status & PCI_STATUS_CAP_LIST) == 0) {
+ return 0;
+ }
+
+ while (max_cap--) {
+ if (xen_host_pci_get_byte(&s->real_device, pos, &pos)) {
+ break;
+ }
+ if (pos < PCI_CONFIG_HEADER_SIZE) {
+ break;
+ }
+
+ pos &= ~3;
+ if (xen_host_pci_get_byte(&s->real_device,
+ pos + PCI_CAP_LIST_ID, &id)) {
+ break;
+ }
+
+ if (id == 0xff) {
+ break;
+ }
+ if (id == cap) {
+ return pos;
+ }
+
+ pos += PCI_CAP_LIST_NEXT;
+ }
+ return 0;
+}
+
+static int xen_pt_config_reg_init(XenPCIPassthroughState *s,
+ XenPTRegGroup *reg_grp, XenPTRegInfo *reg)
+{
+ XenPTReg *reg_entry;
+ uint32_t data = 0;
+ int rc = 0;
+
+ reg_entry = g_new0(XenPTReg, 1);
+ reg_entry->reg = reg;
+
+ if (reg->init) {
+ /* initialize emulate register */
+ rc = reg->init(s, reg_entry->reg,
+ reg_grp->base_offset + reg->offset, &data);
+ if (rc < 0) {
+ free(reg_entry);
+ return rc;
+ }
+ if (data == XEN_PT_INVALID_REG) {
+ /* free unused BAR register entry */
+ free(reg_entry);
+ return 0;
+ }
+ /* set register value */
+ reg_entry->data = data;
+ }
+ /* list add register entry */
+ QLIST_INSERT_HEAD(&reg_grp->reg_tbl_list, reg_entry, entries);
+
+ return 0;
+}
+
+int xen_pt_config_init(XenPCIPassthroughState *s)
+{
+ int i, rc;
+
+ QLIST_INIT(&s->reg_grps);
+
+ for (i = 0; xen_pt_emu_reg_grps[i].grp_size != 0; i++) {
+ uint32_t reg_grp_offset = 0;
+ XenPTRegGroup *reg_grp_entry = NULL;
+
+ if (xen_pt_emu_reg_grps[i].grp_id != 0xFF) {
+ if (xen_pt_hide_dev_cap(&s->real_device,
+ xen_pt_emu_reg_grps[i].grp_id)) {
+ continue;
+ }
+
+ reg_grp_offset = find_cap_offset(s, xen_pt_emu_reg_grps[i].grp_id);
+
+ if (!reg_grp_offset) {
+ continue;
+ }
+ }
+
+ reg_grp_entry = g_new0(XenPTRegGroup, 1);
+ QLIST_INIT(&reg_grp_entry->reg_tbl_list);
+ QLIST_INSERT_HEAD(&s->reg_grps, reg_grp_entry, entries);
+
+ reg_grp_entry->base_offset = reg_grp_offset;
+ reg_grp_entry->reg_grp = xen_pt_emu_reg_grps + i;
+ if (xen_pt_emu_reg_grps[i].size_init) {
+ /* get register group size */
+ rc = xen_pt_emu_reg_grps[i].size_init(s, reg_grp_entry->reg_grp,
+ reg_grp_offset,
+ &reg_grp_entry->size);
+ if (rc < 0) {
+ xen_pt_config_delete(s);
+ return rc;
+ }
+ }
+
+ if (xen_pt_emu_reg_grps[i].grp_type == XEN_PT_GRP_TYPE_EMU) {
+ if (xen_pt_emu_reg_grps[i].emu_regs) {
+ int j = 0;
+ XenPTRegInfo *regs = xen_pt_emu_reg_grps[i].emu_regs;
+ /* initialize capability register */
+ for (j = 0; regs->size != 0; j++, regs++) {
+ /* initialize capability register */
+ rc = xen_pt_config_reg_init(s, reg_grp_entry, regs);
+ if (rc < 0) {
+ xen_pt_config_delete(s);
+ return rc;
+ }
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+/* delete all emulate register */
+void xen_pt_config_delete(XenPCIPassthroughState *s)
+{
+ struct XenPTRegGroup *reg_group, *next_grp;
+ struct XenPTReg *reg, *next_reg;
+
+ /* free MSI/MSI-X info table */
+ if (s->msix) {
+ xen_pt_msix_delete(s);
+ }
+ if (s->msi) {
+ g_free(s->msi);
+ }
+
+ /* free all register group entry */
+ QLIST_FOREACH_SAFE(reg_group, &s->reg_grps, entries, next_grp) {
+ /* free all register entry */
+ QLIST_FOREACH_SAFE(reg, &reg_group->reg_tbl_list, entries, next_reg) {
+ QLIST_REMOVE(reg, entries);
+ g_free(reg);
+ }
+
+ QLIST_REMOVE(reg_group, entries);
+ g_free(reg_group);
+ }
+}
diff --git a/hw/xen_pt_msi.c b/hw/xen_pt_msi.c
new file mode 100644
index 0000000000..2299cc7772
--- /dev/null
+++ b/hw/xen_pt_msi.c
@@ -0,0 +1,620 @@
+/*
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ * Jiang Yunhong <yunhong.jiang@intel.com>
+ *
+ * This file implements direct PCI assignment to a HVM guest
+ */
+
+#include <sys/mman.h>
+
+#include "xen_backend.h"
+#include "xen_pt.h"
+#include "apic-msidef.h"
+
+
+#define XEN_PT_AUTO_ASSIGN -1
+
+/* shift count for gflags */
+#define XEN_PT_GFLAGS_SHIFT_DEST_ID 0
+#define XEN_PT_GFLAGS_SHIFT_RH 8
+#define XEN_PT_GFLAGS_SHIFT_DM 9
+#define XEN_PT_GFLAGSSHIFT_DELIV_MODE 12
+#define XEN_PT_GFLAGSSHIFT_TRG_MODE 15
+
+
+/*
+ * Helpers
+ */
+
+static inline uint8_t msi_vector(uint32_t data)
+{
+ return (data & MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
+}
+
+static inline uint8_t msi_dest_id(uint32_t addr)
+{
+ return (addr & MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
+}
+
+static inline uint32_t msi_ext_dest_id(uint32_t addr_hi)
+{
+ return addr_hi & 0xffffff00;
+}
+
+static uint32_t msi_gflags(uint32_t data, uint64_t addr)
+{
+ uint32_t result = 0;
+ int rh, dm, dest_id, deliv_mode, trig_mode;
+
+ rh = (addr >> MSI_ADDR_REDIRECTION_SHIFT) & 0x1;
+ dm = (addr >> MSI_ADDR_DEST_MODE_SHIFT) & 0x1;
+ dest_id = msi_dest_id(addr);
+ deliv_mode = (data >> MSI_DATA_DELIVERY_MODE_SHIFT) & 0x7;
+ trig_mode = (data >> MSI_DATA_TRIGGER_SHIFT) & 0x1;
+
+ result = dest_id | (rh << XEN_PT_GFLAGS_SHIFT_RH)
+ | (dm << XEN_PT_GFLAGS_SHIFT_DM)
+ | (deliv_mode << XEN_PT_GFLAGSSHIFT_DELIV_MODE)
+ | (trig_mode << XEN_PT_GFLAGSSHIFT_TRG_MODE);
+
+ return result;
+}
+
+static inline uint64_t msi_addr64(XenPTMSI *msi)
+{
+ return (uint64_t)msi->addr_hi << 32 | msi->addr_lo;
+}
+
+static int msi_msix_enable(XenPCIPassthroughState *s,
+ uint32_t address,
+ uint16_t flag,
+ bool enable)
+{
+ uint16_t val = 0;
+
+ if (!address) {
+ return -1;
+ }
+
+ xen_host_pci_get_word(&s->real_device, address, &val);
+ if (enable) {
+ val |= flag;
+ } else {
+ val &= ~flag;
+ }
+ xen_host_pci_set_word(&s->real_device, address, val);
+ return 0;
+}
+
+static int msi_msix_setup(XenPCIPassthroughState *s,
+ uint64_t addr,
+ uint32_t data,
+ int *ppirq,
+ bool is_msix,
+ int msix_entry,
+ bool is_not_mapped)
+{
+ uint8_t gvec = msi_vector(data);
+ int rc = 0;
+
+ assert((!is_msix && msix_entry == 0) || is_msix);
+
+ if (gvec == 0) {
+ /* if gvec is 0, the guest is asking for a particular pirq that
+ * is passed as dest_id */
+ *ppirq = msi_ext_dest_id(addr >> 32) | msi_dest_id(addr);
+ if (!*ppirq) {
+ /* this probably identifies an misconfiguration of the guest,
+ * try the emulated path */
+ *ppirq = XEN_PT_UNASSIGNED_PIRQ;
+ } else {
+ XEN_PT_LOG(&s->dev, "requested pirq %d for MSI%s"
+ " (vec: %#x, entry: %#x)\n",
+ *ppirq, is_msix ? "-X" : "", gvec, msix_entry);
+ }
+ }
+
+ if (is_not_mapped) {
+ uint64_t table_base = 0;
+
+ if (is_msix) {
+ table_base = s->msix->table_base;
+ }
+
+ rc = xc_physdev_map_pirq_msi(xen_xc, xen_domid, XEN_PT_AUTO_ASSIGN,
+ ppirq, PCI_DEVFN(s->real_device.dev,
+ s->real_device.func),
+ s->real_device.bus,
+ msix_entry, table_base);
+ if (rc) {
+ XEN_PT_ERR(&s->dev,
+ "Mapping of MSI%s (rc: %i, vec: %#x, entry %#x)\n",
+ is_msix ? "-X" : "", rc, gvec, msix_entry);
+ return rc;
+ }
+ }
+
+ return 0;
+}
+static int msi_msix_update(XenPCIPassthroughState *s,
+ uint64_t addr,
+ uint32_t data,
+ int pirq,
+ bool is_msix,
+ int msix_entry,
+ int *old_pirq)
+{
+ PCIDevice *d = &s->dev;
+ uint8_t gvec = msi_vector(data);
+ uint32_t gflags = msi_gflags(data, addr);
+ int rc = 0;
+ uint64_t table_addr = 0;
+
+ XEN_PT_LOG(d, "Updating MSI%s with pirq %d gvec %#x gflags %#x"
+ " (entry: %#x)\n",
+ is_msix ? "-X" : "", pirq, gvec, gflags, msix_entry);
+
+ if (is_msix) {
+ table_addr = s->msix->mmio_base_addr;
+ }
+
+ rc = xc_domain_update_msi_irq(xen_xc, xen_domid, gvec,
+ pirq, gflags, table_addr);
+
+ if (rc) {
+ XEN_PT_ERR(d, "Updating of MSI%s failed. (rc: %d)\n",
+ is_msix ? "-X" : "", rc);
+
+ if (xc_physdev_unmap_pirq(xen_xc, xen_domid, *old_pirq)) {
+ XEN_PT_ERR(d, "Unmapping of MSI%s pirq %d failed.\n",
+ is_msix ? "-X" : "", *old_pirq);
+ }
+ *old_pirq = XEN_PT_UNASSIGNED_PIRQ;
+ }
+ return rc;
+}
+
+static int msi_msix_disable(XenPCIPassthroughState *s,
+ uint64_t addr,
+ uint32_t data,
+ int pirq,
+ bool is_msix,
+ bool is_binded)
+{
+ PCIDevice *d = &s->dev;
+ uint8_t gvec = msi_vector(data);
+ uint32_t gflags = msi_gflags(data, addr);
+ int rc = 0;
+
+ if (pirq == XEN_PT_UNASSIGNED_PIRQ) {
+ return 0;
+ }
+
+ if (is_binded) {
+ XEN_PT_LOG(d, "Unbind MSI%s with pirq %d, gvec %#x\n",
+ is_msix ? "-X" : "", pirq, gvec);
+ rc = xc_domain_unbind_msi_irq(xen_xc, xen_domid, gvec, pirq, gflags);
+ if (rc) {
+ XEN_PT_ERR(d, "Unbinding of MSI%s failed. (pirq: %d, gvec: %#x)\n",
+ is_msix ? "-X" : "", pirq, gvec);
+ return rc;
+ }
+ }
+
+ XEN_PT_LOG(d, "Unmap MSI%s pirq %d\n", is_msix ? "-X" : "", pirq);
+ rc = xc_physdev_unmap_pirq(xen_xc, xen_domid, pirq);
+ if (rc) {
+ XEN_PT_ERR(d, "Unmapping of MSI%s pirq %d failed. (rc: %i)\n",
+ is_msix ? "-X" : "", pirq, rc);
+ return rc;
+ }
+
+ return 0;
+}
+
+/*
+ * MSI virtualization functions
+ */
+
+int xen_pt_msi_set_enable(XenPCIPassthroughState *s, bool enable)
+{
+ XEN_PT_LOG(&s->dev, "%s MSI.\n", enable ? "enabling" : "disabling");
+
+ if (!s->msi) {
+ return -1;
+ }
+
+ return msi_msix_enable(s, s->msi->ctrl_offset, PCI_MSI_FLAGS_ENABLE,
+ enable);
+}
+
+/* setup physical msi, but don't enable it */
+int xen_pt_msi_setup(XenPCIPassthroughState *s)
+{
+ int pirq = XEN_PT_UNASSIGNED_PIRQ;
+ int rc = 0;
+ XenPTMSI *msi = s->msi;
+
+ if (msi->initialized) {
+ XEN_PT_ERR(&s->dev,
+ "Setup physical MSI when it has been properly initialized.\n");
+ return -1;
+ }
+
+ rc = msi_msix_setup(s, msi_addr64(msi), msi->data, &pirq, false, 0, true);
+ if (rc) {
+ return rc;
+ }
+
+ if (pirq < 0) {
+ XEN_PT_ERR(&s->dev, "Invalid pirq number: %d.\n", pirq);
+ return -1;
+ }
+
+ msi->pirq = pirq;
+ XEN_PT_LOG(&s->dev, "MSI mapped with pirq %d.\n", pirq);
+
+ return 0;
+}
+
+int xen_pt_msi_update(XenPCIPassthroughState *s)
+{
+ XenPTMSI *msi = s->msi;
+ return msi_msix_update(s, msi_addr64(msi), msi->data, msi->pirq,
+ false, 0, &msi->pirq);
+}
+
+void xen_pt_msi_disable(XenPCIPassthroughState *s)
+{
+ XenPTMSI *msi = s->msi;
+
+ if (!msi) {
+ return;
+ }
+
+ xen_pt_msi_set_enable(s, false);
+
+ msi_msix_disable(s, msi_addr64(msi), msi->data, msi->pirq, false,
+ msi->initialized);
+
+ /* clear msi info */
+ msi->flags = 0;
+ msi->mapped = false;
+ msi->pirq = XEN_PT_UNASSIGNED_PIRQ;
+}
+
+/*
+ * MSI-X virtualization functions
+ */
+
+static int msix_set_enable(XenPCIPassthroughState *s, bool enabled)
+{
+ XEN_PT_LOG(&s->dev, "%s MSI-X.\n", enabled ? "enabling" : "disabling");
+
+ if (!s->msix) {
+ return -1;
+ }
+
+ return msi_msix_enable(s, s->msix->ctrl_offset, PCI_MSIX_FLAGS_ENABLE,
+ enabled);
+}
+
+static int xen_pt_msix_update_one(XenPCIPassthroughState *s, int entry_nr)
+{
+ XenPTMSIXEntry *entry = NULL;
+ int pirq;
+ int rc;
+
+ if (entry_nr < 0 || entry_nr >= s->msix->total_entries) {
+ return -EINVAL;
+ }
+
+ entry = &s->msix->msix_entry[entry_nr];
+
+ if (!entry->updated) {
+ return 0;
+ }
+
+ pirq = entry->pirq;
+
+ rc = msi_msix_setup(s, entry->data, entry->data, &pirq, true, entry_nr,
+ entry->pirq == XEN_PT_UNASSIGNED_PIRQ);
+ if (rc) {
+ return rc;
+ }
+ if (entry->pirq == XEN_PT_UNASSIGNED_PIRQ) {
+ entry->pirq = pirq;
+ }
+
+ rc = msi_msix_update(s, entry->addr, entry->data, pirq, true,
+ entry_nr, &entry->pirq);
+
+ if (!rc) {
+ entry->updated = false;
+ }
+
+ return rc;
+}
+
+int xen_pt_msix_update(XenPCIPassthroughState *s)
+{
+ XenPTMSIX *msix = s->msix;
+ int i;
+
+ for (i = 0; i < msix->total_entries; i++) {
+ xen_pt_msix_update_one(s, i);
+ }
+
+ return 0;
+}
+
+void xen_pt_msix_disable(XenPCIPassthroughState *s)
+{
+ int i = 0;
+
+ msix_set_enable(s, false);
+
+ for (i = 0; i < s->msix->total_entries; i++) {
+ XenPTMSIXEntry *entry = &s->msix->msix_entry[i];
+
+ msi_msix_disable(s, entry->addr, entry->data, entry->pirq, true, true);
+
+ /* clear MSI-X info */
+ entry->pirq = XEN_PT_UNASSIGNED_PIRQ;
+ entry->updated = false;
+ }
+}
+
+int xen_pt_msix_update_remap(XenPCIPassthroughState *s, int bar_index)
+{
+ XenPTMSIXEntry *entry;
+ int i, ret;
+
+ if (!(s->msix && s->msix->bar_index == bar_index)) {
+ return 0;
+ }
+
+ for (i = 0; i < s->msix->total_entries; i++) {
+ entry = &s->msix->msix_entry[i];
+ if (entry->pirq != XEN_PT_UNASSIGNED_PIRQ) {
+ ret = xc_domain_unbind_pt_irq(xen_xc, xen_domid, entry->pirq,
+ PT_IRQ_TYPE_MSI, 0, 0, 0, 0);
+ if (ret) {
+ XEN_PT_ERR(&s->dev, "unbind MSI-X entry %d failed\n",
+ entry->pirq);
+ }
+ entry->updated = true;
+ }
+ }
+ return xen_pt_msix_update(s);
+}
+
+static uint32_t get_entry_value(XenPTMSIXEntry *e, int offset)
+{
+ switch (offset) {
+ case PCI_MSIX_ENTRY_LOWER_ADDR:
+ return e->addr & UINT32_MAX;
+ case PCI_MSIX_ENTRY_UPPER_ADDR:
+ return e->addr >> 32;
+ case PCI_MSIX_ENTRY_DATA:
+ return e->data;
+ case PCI_MSIX_ENTRY_VECTOR_CTRL:
+ return e->vector_ctrl;
+ default:
+ return 0;
+ }
+}
+
+static void set_entry_value(XenPTMSIXEntry *e, int offset, uint32_t val)
+{
+ switch (offset) {
+ case PCI_MSIX_ENTRY_LOWER_ADDR:
+ e->addr = (e->addr & ((uint64_t)UINT32_MAX << 32)) | val;
+ break;
+ case PCI_MSIX_ENTRY_UPPER_ADDR:
+ e->addr = (uint64_t)val << 32 | (e->addr & UINT32_MAX);
+ break;
+ case PCI_MSIX_ENTRY_DATA:
+ e->data = val;
+ break;
+ case PCI_MSIX_ENTRY_VECTOR_CTRL:
+ e->vector_ctrl = val;
+ break;
+ }
+}
+
+static void pci_msix_write(void *opaque, target_phys_addr_t addr,
+ uint64_t val, unsigned size)
+{
+ XenPCIPassthroughState *s = opaque;
+ XenPTMSIX *msix = s->msix;
+ XenPTMSIXEntry *entry;
+ int entry_nr, offset;
+
+ entry_nr = addr / PCI_MSIX_ENTRY_SIZE;
+ if (entry_nr < 0 || entry_nr >= msix->total_entries) {
+ XEN_PT_ERR(&s->dev, "asked MSI-X entry '%i' invalid!\n", entry_nr);
+ return;
+ }
+ entry = &msix->msix_entry[entry_nr];
+ offset = addr % PCI_MSIX_ENTRY_SIZE;
+
+ if (offset != PCI_MSIX_ENTRY_VECTOR_CTRL) {
+ const volatile uint32_t *vec_ctrl;
+
+ if (get_entry_value(entry, offset) == val) {
+ return;
+ }
+
+ /*
+ * If Xen intercepts the mask bit access, entry->vec_ctrl may not be
+ * up-to-date. Read from hardware directly.
+ */
+ vec_ctrl = s->msix->phys_iomem_base + entry_nr * PCI_MSIX_ENTRY_SIZE
+ + PCI_MSIX_ENTRY_VECTOR_CTRL;
+
+ if (msix->enabled && !(*vec_ctrl & PCI_MSIX_ENTRY_CTRL_MASKBIT)) {
+ XEN_PT_ERR(&s->dev, "Can't update msix entry %d since MSI-X is"
+ " already enabled.\n", entry_nr);
+ return;
+ }
+
+ entry->updated = true;
+ }
+
+ set_entry_value(entry, offset, val);
+
+ if (offset == PCI_MSIX_ENTRY_VECTOR_CTRL) {
+ if (msix->enabled && !(val & PCI_MSIX_ENTRY_CTRL_MASKBIT)) {
+ xen_pt_msix_update_one(s, entry_nr);
+ }
+ }
+}
+
+static uint64_t pci_msix_read(void *opaque, target_phys_addr_t addr,
+ unsigned size)
+{
+ XenPCIPassthroughState *s = opaque;
+ XenPTMSIX *msix = s->msix;
+ int entry_nr, offset;
+
+ entry_nr = addr / PCI_MSIX_ENTRY_SIZE;
+ if (entry_nr < 0) {
+ XEN_PT_ERR(&s->dev, "asked MSI-X entry '%i' invalid!\n", entry_nr);
+ return 0;
+ }
+
+ offset = addr % PCI_MSIX_ENTRY_SIZE;
+
+ if (addr < msix->total_entries * PCI_MSIX_ENTRY_SIZE) {
+ return get_entry_value(&msix->msix_entry[entry_nr], offset);
+ } else {
+ /* Pending Bit Array (PBA) */
+ return *(uint32_t *)(msix->phys_iomem_base + addr);
+ }
+}
+
+static const MemoryRegionOps pci_msix_ops = {
+ .read = pci_msix_read,
+ .write = pci_msix_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ .unaligned = false,
+ },
+};
+
+int xen_pt_msix_init(XenPCIPassthroughState *s, uint32_t base)
+{
+ uint8_t id = 0;
+ uint16_t control = 0;
+ uint32_t table_off = 0;
+ int i, total_entries, bar_index;
+ XenHostPCIDevice *hd = &s->real_device;
+ PCIDevice *d = &s->dev;
+ int fd = -1;
+ XenPTMSIX *msix = NULL;
+ int rc = 0;
+
+ rc = xen_host_pci_get_byte(hd, base + PCI_CAP_LIST_ID, &id);
+ if (rc) {
+ return rc;
+ }
+
+ if (id != PCI_CAP_ID_MSIX) {
+ XEN_PT_ERR(d, "Invalid id %#x base %#x\n", id, base);
+ return -1;
+ }
+
+ xen_host_pci_get_word(hd, base + PCI_MSIX_FLAGS, &control);
+ total_entries = control & PCI_MSIX_FLAGS_QSIZE;
+ total_entries += 1;
+
+ s->msix = g_malloc0(sizeof (XenPTMSIX)
+ + total_entries * sizeof (XenPTMSIXEntry));
+ msix = s->msix;
+
+ msix->total_entries = total_entries;
+ for (i = 0; i < total_entries; i++) {
+ msix->msix_entry[i].pirq = XEN_PT_UNASSIGNED_PIRQ;
+ }
+
+ memory_region_init_io(&msix->mmio, &pci_msix_ops, s, "xen-pci-pt-msix",
+ (total_entries * PCI_MSIX_ENTRY_SIZE
+ + XC_PAGE_SIZE - 1)
+ & XC_PAGE_MASK);
+
+ xen_host_pci_get_long(hd, base + PCI_MSIX_TABLE, &table_off);
+ bar_index = msix->bar_index = table_off & PCI_MSIX_FLAGS_BIRMASK;
+ table_off = table_off & ~PCI_MSIX_FLAGS_BIRMASK;
+ msix->table_base = s->real_device.io_regions[bar_index].base_addr;
+ XEN_PT_LOG(d, "get MSI-X table BAR base 0x%"PRIx64"\n", msix->table_base);
+
+ fd = open("/dev/mem", O_RDWR);
+ if (fd == -1) {
+ rc = -errno;
+ XEN_PT_ERR(d, "Can't open /dev/mem: %s\n", strerror(errno));
+ goto error_out;
+ }
+ XEN_PT_LOG(d, "table_off = %#x, total_entries = %d\n",
+ table_off, total_entries);
+ msix->table_offset_adjust = table_off & 0x0fff;
+ msix->phys_iomem_base =
+ mmap(NULL,
+ total_entries * PCI_MSIX_ENTRY_SIZE + msix->table_offset_adjust,
+ PROT_READ,
+ MAP_SHARED | MAP_LOCKED,
+ fd,
+ msix->table_base + table_off - msix->table_offset_adjust);
+ close(fd);
+ if (msix->phys_iomem_base == MAP_FAILED) {
+ rc = -errno;
+ XEN_PT_ERR(d, "Can't map physical MSI-X table: %s\n", strerror(errno));
+ goto error_out;
+ }
+ msix->phys_iomem_base = (char *)msix->phys_iomem_base
+ + msix->table_offset_adjust;
+
+ XEN_PT_LOG(d, "mapping physical MSI-X table to %p\n",
+ msix->phys_iomem_base);
+
+ memory_region_add_subregion_overlap(&s->bar[bar_index], table_off,
+ &msix->mmio,
+ 2); /* Priority: pci default + 1 */
+
+ return 0;
+
+error_out:
+ memory_region_destroy(&msix->mmio);
+ g_free(s->msix);
+ s->msix = NULL;
+ return rc;
+}
+
+void xen_pt_msix_delete(XenPCIPassthroughState *s)
+{
+ XenPTMSIX *msix = s->msix;
+
+ if (!msix) {
+ return;
+ }
+
+ /* unmap the MSI-X memory mapped register area */
+ if (msix->phys_iomem_base) {
+ XEN_PT_LOG(&s->dev, "unmapping physical MSI-X table from %p\n",
+ msix->phys_iomem_base);
+ munmap(msix->phys_iomem_base, msix->total_entries * PCI_MSIX_ENTRY_SIZE
+ + msix->table_offset_adjust);
+ }
+
+ memory_region_del_subregion(&s->bar[msix->bar_index], &msix->mmio);
+ memory_region_destroy(&msix->mmio);
+
+ g_free(s->msix);
+ s->msix = NULL;
+}
diff --git a/qemu-common.h b/qemu-common.h
index 8f87e413a7..9d9e603c6e 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -275,6 +275,13 @@ typedef enum LostTickPolicy {
LOST_TICK_MAX
} LostTickPolicy;
+typedef struct PCIHostDeviceAddress {
+ unsigned int domain;
+ unsigned int bus;
+ unsigned int slot;
+ unsigned int function;
+} PCIHostDeviceAddress;
+
void tcg_exec_init(unsigned long tb_size);
bool tcg_enabled(void);
diff --git a/xen-all.c b/xen-all.c
index b5220cc6a3..59f232395e 100644
--- a/xen-all.c
+++ b/xen-all.c
@@ -1191,3 +1191,15 @@ void xen_register_framebuffer(MemoryRegion *mr)
{
framebuffer = mr;
}
+
+void xen_shutdown_fatal_error(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+ fprintf(stderr, "Will destroy the domain.\n");
+ /* destroy the domain */
+ qemu_system_shutdown_request();
+}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-18 02:59:39 +0000