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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen staging] libxl_pci: Use ev_qmp in do_pci_add
commit 34bf484e4e4ae7f5995723f7468b746ec7ec5b3d
Author: Anthony PERARD <anthony.perard@xxxxxxxxxx>
AuthorDate: Sun May 12 11:27:58 2019 +0100
Commit: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
CommitDate: Fri Sep 20 10:42:43 2019 +0100
libxl_pci: Use ev_qmp in do_pci_add
This patch also replaces the use of
libxl__wait_for_device_model_deprecated() by its equivalent
without the need for a thread.
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
tools/libxl/libxl_internal.h | 1 -
tools/libxl/libxl_pci.c | 288 +++++++++++++++++++++++++++++++++++++++----
tools/libxl/libxl_qmp.c | 96 ---------------
3 files changed, 265 insertions(+), 120 deletions(-)
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 18c665d3db..d60b9c416a 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -1982,7 +1982,6 @@ typedef struct libxl__qmp_handler libxl__qmp_handler;
*/
_hidden libxl__qmp_handler *libxl__qmp_initialize(libxl__gc *gc,
uint32_t domid);
-_hidden int libxl__qmp_pci_add(libxl__gc *gc, int d, libxl_device_pci *pcidev);
_hidden int libxl__qmp_pci_del(libxl__gc *gc, int domid,
libxl_device_pci *pcidev);
/* Resume hvm domain */
diff --git a/tools/libxl/libxl_pci.c b/tools/libxl/libxl_pci.c
index 503db6c260..3477f3aba6 100644
--- a/tools/libxl/libxl_pci.c
+++ b/tools/libxl/libxl_pci.c
@@ -23,6 +23,7 @@
#define PCI_BDF_VDEVFN "%04x:%02x:%02x.%01x@%02x"
#define PCI_OPTIONS "msitranslate=%d,power_mgmt=%d"
#define PCI_BDF_XSPATH "%04x-%02x-%02x-%01x"
+#define PCI_PT_QDEV_ID "pci-pt-%02x_%02x.%01x"
static unsigned int pcidev_encode_bdf(libxl_device_pci *pcidev)
{
@@ -991,33 +992,40 @@ typedef struct pci_add_state {
void (*callback)(libxl__egc *, struct pci_add_state *, int rc);
/* private to do_pci_add */
+ libxl__xswait_state xswait;
+ libxl__ev_qmp qmp;
+ libxl__ev_time timeout;
libxl_device_pci *pcidev;
int pci_domid;
} pci_add_state;
+static void pci_add_qemu_trad_watch_state_cb(libxl__egc *egc,
+ libxl__xswait_state *xswa, int rc, const char *state);
+static void pci_add_qmp_device_add(libxl__egc *, pci_add_state *);
+static void pci_add_qmp_device_add_cb(libxl__egc *,
+ libxl__ev_qmp *, const libxl__json_object *, int rc);
+static void pci_add_qmp_query_pci_cb(libxl__egc *,
+ libxl__ev_qmp *, const libxl__json_object *, int rc);
+static void pci_add_timeout(libxl__egc *egc, libxl__ev_time *ev,
+ const struct timeval *requested_abs, int rc);
+static void pci_add_dm_done(libxl__egc *,
+ pci_add_state *, int rc);
+
static void do_pci_add(libxl__egc *egc,
libxl_domid domid,
libxl_device_pci *pcidev,
pci_add_state *pas)
{
STATE_AO_GC(pas->aodev->ao);
- libxl_ctx *ctx = libxl__gc_owner(gc);
libxl_domain_type type = libxl__domain_type(gc, domid);
- char *sysfs_path;
- FILE *f;
- unsigned long long start, end, flags, size;
- int irq, i, rc, hvm = 0;
- uint32_t flag = XEN_DOMCTL_DEV_RDM_RELAXED;
- uint32_t domainid = domid;
- bool isstubdom = libxl_is_stubdom(ctx, domid, &domainid);
- int r;
-
- /* Convenience aliases */
- bool starting = pas->starting;
+ int rc;
/* init pci_add_state */
+ libxl__xswait_init(&pas->xswait);
+ libxl__ev_qmp_init(&pas->qmp);
pas->pcidev = pcidev;
pas->pci_domid = domid;
+ libxl__ev_time_init(&pas->timeout);
if (type == LIBXL_DOMAIN_TYPE_INVALID) {
rc = ERROR_FAIL;
@@ -1025,26 +1033,259 @@ static void do_pci_add(libxl__egc *egc,
}
if (type == LIBXL_DOMAIN_TYPE_HVM) {
- hvm = 1;
switch (libxl__device_model_version_running(gc, domid)) {
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL:
- if (libxl__wait_for_device_model_deprecated(gc, domid,
- "running", NULL, NULL, NULL) < 0) {
- rc = ERROR_FAIL;
- goto out;
- }
- rc = qemu_pci_add_xenstore(gc, domid, pcidev);
- break;
+ pas->xswait.ao = ao;
+ pas->xswait.what = "Device Model";
+ pas->xswait.path = DEVICE_MODEL_XS_PATH(gc,
+ libxl_get_stubdom_id(CTX, domid), domid, "/state");
+ pas->xswait.timeout_ms = LIBXL_DEVICE_MODEL_START_TIMEOUT *
1000;
+ pas->xswait.callback = pci_add_qemu_trad_watch_state_cb;
+ rc = libxl__xswait_start(gc, &pas->xswait);
+ if (rc) goto out;
+ return;
case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
- rc = libxl__qmp_pci_add(gc, domid, pcidev);
- break;
+ pci_add_qmp_device_add(egc, pas); /* must be last */
+ return;
default:
rc = ERROR_INVAL;
+ break;
}
- if ( rc )
+ }
+
+ rc = 0;
+
+out:
+ pci_add_dm_done(egc, pas, rc); /* must be last */
+}
+
+static void pci_add_qemu_trad_watch_state_cb(libxl__egc *egc,
+ libxl__xswait_state *xswa,
+ int rc,
+ const char *state)
+{
+ pci_add_state *pas = CONTAINER_OF(xswa, *pas, xswait);
+ STATE_AO_GC(pas->aodev->ao);
+
+ /* Convenience aliases */
+ libxl_domid domid = pas->domid;
+ libxl_device_pci *pcidev = pas->pcidev;
+
+ if (rc) {
+ if (rc == ERROR_TIMEDOUT) {
+ LOGD(ERROR, domid, "%s not ready", xswa->what);
+ }
+ goto out;
+ }
+
+ if (!state)
+ return;
+ if (strcmp(state, "running"))
+ return;
+
+ rc = qemu_pci_add_xenstore(gc, domid, pcidev);
+out:
+ libxl__xswait_stop(gc, xswa);
+ pci_add_dm_done(egc, pas, rc); /* must be last */
+}
+
+static void pci_add_qmp_device_add(libxl__egc *egc, pci_add_state *pas)
+{
+ STATE_AO_GC(pas->aodev->ao);
+ libxl__json_object *args = NULL;
+ int rc;
+
+ /* Convenience aliases */
+ libxl_domid domid = pas->domid;
+ libxl_device_pci *pcidev = pas->pcidev;
+ libxl__ev_qmp *const qmp = &pas->qmp;
+
+ rc = libxl__ev_time_register_rel(ao, &pas->timeout,
+ pci_add_timeout,
+ LIBXL_QMP_CMD_TIMEOUT * 1000);
+ if (rc) goto out;
+
+ libxl__qmp_param_add_string(gc, &args, "driver",
+ "xen-pci-passthrough");
+ QMP_PARAMETERS_SPRINTF(&args, "id", PCI_PT_QDEV_ID,
+ pcidev->bus, pcidev->dev, pcidev->func);
+ QMP_PARAMETERS_SPRINTF(&args, "hostaddr",
+ "%04x:%02x:%02x.%01x", pcidev->domain,
+ pcidev->bus, pcidev->dev, pcidev->func);
+ if (pcidev->vdevfn) {
+ QMP_PARAMETERS_SPRINTF(&args, "addr", "%x.%x",
+ PCI_SLOT(pcidev->vdevfn),
+ PCI_FUNC(pcidev->vdevfn));
+ }
+ /*
+ * Version of QEMU prior to the XSA-131 fix did not support
+ * this property and were effectively always in permissive
+ * mode. The fix for XSA-131 switched the default to be
+ * restricted by default and added the permissive property.
+ *
+ * Therefore in order to support both old and new QEMU we only
+ * set the permissive flag if it is true. Users of older QEMU
+ * have no reason to set the flag so this is ok.
+ */
+ if (pcidev->permissive)
+ libxl__qmp_param_add_bool(gc, &args, "permissive", true);
+
+ qmp->ao = pas->aodev->ao;
+ qmp->domid = domid;
+ qmp->payload_fd = -1;
+ qmp->callback = pci_add_qmp_device_add_cb;
+ rc = libxl__ev_qmp_send(gc, qmp, "device_add", args);
+ if (rc) goto out;
+ return;
+
+out:
+ pci_add_dm_done(egc, pas, rc); /* must be last */
+}
+
+static void pci_add_qmp_device_add_cb(libxl__egc *egc,
+ libxl__ev_qmp *qmp,
+ const libxl__json_object *response,
+ int rc)
+{
+ EGC_GC;
+ pci_add_state *pas = CONTAINER_OF(qmp, *pas, qmp);
+
+ if (rc) goto out;
+
+ qmp->callback = pci_add_qmp_query_pci_cb;
+ rc = libxl__ev_qmp_send(gc, qmp, "query-pci", NULL);
+ if (rc) goto out;
+ return;
+
+out:
+ pci_add_dm_done(egc, pas, rc); /* must be last */
+}
+
+static void pci_add_qmp_query_pci_cb(libxl__egc *egc,
+ libxl__ev_qmp *qmp,
+ const libxl__json_object *response,
+ int rc)
+{
+ EGC_GC;
+ pci_add_state *pas = CONTAINER_OF(qmp, *pas, qmp);
+ const libxl__json_object *bus = NULL;
+ char *asked_id;
+ int i, j;
+ const libxl__json_object *devices = NULL;
+ const libxl__json_object *device = NULL;
+ const libxl__json_object *o = NULL;
+ const char *id = NULL;
+ int dev_slot, dev_func;
+
+ /* Convenience aliases */
+ libxl_device_pci *pcidev = pas->pcidev;
+
+ if (rc) goto out;
+
+ /* `query-pci' returns:
+ * [
+ * {'bus': 'int',
+ * 'devices': [
+ * {'bus': 'int', 'slot': 'int', 'function': 'int',
+ * 'class_info': 'PciDeviceClass', 'id': 'PciDeviceId',
+ * '*irq': 'int', 'qdev_id': 'str',
+ * '*pci_bridge': 'PciBridgeInfo',
+ * 'regions': ['PciMemoryRegion']
+ * }
+ * ]
+ * }
+ * ]
+ * (See qemu.git/qapi/ for the struct that aren't detailed here)
+ */
+
+ asked_id = GCSPRINTF(PCI_PT_QDEV_ID,
+ pcidev->bus, pcidev->dev, pcidev->func);
+
+ for (i = 0; (bus = libxl__json_array_get(response, i)); i++) {
+ devices = libxl__json_map_get("devices", bus, JSON_ARRAY);
+ if (!devices) {
+ rc = ERROR_QEMU_API;
goto out;
+ }
+
+ for (j = 0; (device = libxl__json_array_get(devices, j)); j++) {
+ o = libxl__json_map_get("qdev_id", device, JSON_STRING);
+ if (!o) {
+ rc = ERROR_QEMU_API;
+ goto out;
+ }
+ id = libxl__json_object_get_string(o);
+ if (!id || strcmp(asked_id, id))
+ continue;
+
+ o = libxl__json_map_get("slot", device, JSON_INTEGER);
+ if (!o) {
+ rc = ERROR_QEMU_API;
+ goto out;
+ }
+ dev_slot = libxl__json_object_get_integer(o);
+ o = libxl__json_map_get("function", device, JSON_INTEGER);
+ if (!o) {
+ rc = ERROR_QEMU_API;
+ goto out;
+ }
+ dev_func = libxl__json_object_get_integer(o);
+
+ pcidev->vdevfn = PCI_DEVFN(dev_slot, dev_func);
+
+ rc = 0;
+ goto out;
+ }
}
+ rc = ERROR_FAIL;
+ LOGD(ERROR, qmp->domid,
+ "PCI device id '%s' wasn't found in QEMU's 'query-pci' response.",
+ asked_id);
+
+out:
+ if (rc == ERROR_QEMU_API) {
+ LOGD(ERROR, qmp->domid,
+ "Unexpected response to QMP cmd 'query-pci', received:\n%s",
+ JSON(response));
+ }
+ pci_add_dm_done(egc, pas, rc); /* must be last */
+}
+
+static void pci_add_timeout(libxl__egc *egc, libxl__ev_time *ev,
+ const struct timeval *requested_abs,
+ int rc)
+{
+ pci_add_state *pas = CONTAINER_OF(ev, *pas, timeout);
+
+ pci_add_dm_done(egc, pas, rc);
+}
+
+static void pci_add_dm_done(libxl__egc *egc,
+ pci_add_state *pas,
+ int rc)
+{
+ STATE_AO_GC(pas->aodev->ao);
+ libxl_ctx *ctx = libxl__gc_owner(gc);
+ libxl_domid domid = pas->pci_domid;
+ char *sysfs_path;
+ FILE *f;
+ unsigned long long start, end, flags, size;
+ int irq, i;
+ int r;
+ uint32_t flag = XEN_DOMCTL_DEV_RDM_RELAXED;
+ uint32_t domainid = domid;
+ bool isstubdom = libxl_is_stubdom(ctx, domid, &domainid);
+
+ /* Convenience aliases */
+ bool starting = pas->starting;
+ libxl_device_pci *pcidev = pas->pcidev;
+ bool hvm = libxl__domain_type(gc, domid) == LIBXL_DOMAIN_TYPE_HVM;
+
+ libxl__ev_qmp_dispose(gc, &pas->qmp);
+
+ if (rc) goto out;
+
sysfs_path = GCSPRINTF(SYSFS_PCI_DEV"/"PCI_BDF"/resource", pcidev->domain,
pcidev->bus, pcidev->dev, pcidev->func);
f = fopen(sysfs_path, "r");
@@ -1145,6 +1386,7 @@ out_no_irq:
else
rc = 0;
out:
+ libxl__ev_time_deregister(gc, &pas->timeout);
pas->callback(egc, pas, rc);
}
diff --git a/tools/libxl/libxl_qmp.c b/tools/libxl/libxl_qmp.c
index c78ef4637d..38ba63d5b9 100644
--- a/tools/libxl/libxl_qmp.c
+++ b/tools/libxl/libxl_qmp.c
@@ -736,54 +736,6 @@ void libxl__qmp_cleanup(libxl__gc *gc, uint32_t domid)
}
}
-static int pci_add_callback(libxl__qmp_handler *qmp,
- const libxl__json_object *response, void *opaque)
-{
- libxl_device_pci *pcidev = opaque;
- const libxl__json_object *bus = NULL;
- GC_INIT(qmp->ctx);
- int i, j, rc = -1;
- char *asked_id = GCSPRINTF(PCI_PT_QDEV_ID,
- pcidev->bus, pcidev->dev, pcidev->func);
-
- for (i = 0; (bus = libxl__json_array_get(response, i)); i++) {
- const libxl__json_object *devices = NULL;
- const libxl__json_object *device = NULL;
- const libxl__json_object *o = NULL;
- const char *id = NULL;
-
- devices = libxl__json_map_get("devices", bus, JSON_ARRAY);
-
- for (j = 0; (device = libxl__json_array_get(devices, j)); j++) {
- o = libxl__json_map_get("qdev_id", device, JSON_STRING);
- id = libxl__json_object_get_string(o);
-
- if (id && strcmp(asked_id, id) == 0) {
- int dev_slot, dev_func;
-
- o = libxl__json_map_get("slot", device, JSON_INTEGER);
- if (!o)
- goto out;
- dev_slot = libxl__json_object_get_integer(o);
- o = libxl__json_map_get("function", device, JSON_INTEGER);
- if (!o)
- goto out;
- dev_func = libxl__json_object_get_integer(o);
-
- pcidev->vdevfn = PCI_DEVFN(dev_slot, dev_func);
-
- rc = 0;
- goto out;
- }
- }
- }
-
-
-out:
- GC_FREE;
- return rc;
-}
-
static int pci_del_callback(libxl__qmp_handler *qmp,
const libxl__json_object *response, void *opaque)
{
@@ -833,54 +785,6 @@ static int qmp_run_command(libxl__gc *gc, int domid,
return rc;
}
-int libxl__qmp_pci_add(libxl__gc *gc, int domid, libxl_device_pci *pcidev)
-{
- libxl__qmp_handler *qmp = NULL;
- libxl__json_object *args = NULL;
- char *hostaddr = NULL;
- int rc = 0;
-
- qmp = libxl__qmp_initialize(gc, domid);
- if (!qmp)
- return -1;
-
- hostaddr = GCSPRINTF("%04x:%02x:%02x.%01x", pcidev->domain,
- pcidev->bus, pcidev->dev, pcidev->func);
- if (!hostaddr)
- return -1;
-
- libxl__qmp_param_add_string(gc, &args, "driver", "xen-pci-passthrough");
- QMP_PARAMETERS_SPRINTF(&args, "id", PCI_PT_QDEV_ID,
- pcidev->bus, pcidev->dev, pcidev->func);
- libxl__qmp_param_add_string(gc, &args, "hostaddr", hostaddr);
- if (pcidev->vdevfn) {
- QMP_PARAMETERS_SPRINTF(&args, "addr", "%x.%x",
- PCI_SLOT(pcidev->vdevfn),
PCI_FUNC(pcidev->vdevfn));
- }
- /*
- * Version of QEMU prior to the XSA-131 fix did not support this
- * property and were effectively always in permissive mode. The
- * fix for XSA-131 switched the default to be restricted by
- * default and added the permissive property.
- *
- * Therefore in order to support both old and new QEMU we only set
- * the permissive flag if it is true. Users of older QEMU have no
- * reason to set the flag so this is ok.
- */
- if (pcidev->permissive)
- libxl__qmp_param_add_bool(gc, &args, "permissive", true);
-
- rc = qmp_synchronous_send(qmp, "device_add", args,
- NULL, NULL, qmp->timeout);
- if (rc == 0) {
- rc = qmp_synchronous_send(qmp, "query-pci", NULL,
- pci_add_callback, pcidev, qmp->timeout);
- }
-
- libxl__qmp_close(qmp);
- return rc;
-}
-
static int qmp_device_del(libxl__gc *gc, int domid, char *id)
{
libxl__json_object *args = NULL;
--
generated by git-patchbot for /home/xen/git/xen.git#staging
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