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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] User tools send evtchn notifications via /dev/xen/evtchn
# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 76a7a7aa27e40022fbfeacdd8d6ed9395e875894
# Parent 4083eb31def03aa7cb98edf4a390e2f94459efe2
User tools send evtchn notifications via /dev/xen/evtchn
rather than using hypercall directly.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
diff -r 4083eb31def0 -r 76a7a7aa27e4
linux-2.6-xen-sparse/drivers/xen/evtchn/evtchn.c
--- a/linux-2.6-xen-sparse/drivers/xen/evtchn/evtchn.c Thu Oct 6 15:07:52 2005
+++ b/linux-2.6-xen-sparse/drivers/xen/evtchn/evtchn.c Thu Oct 6 16:02:38 2005
@@ -297,6 +297,24 @@
break;
}
+ case IOCTL_EVTCHN_NOTIFY: {
+ struct ioctl_evtchn_notify notify;
+
+ rc = -EFAULT;
+ if (copy_from_user(¬ify, (void *)arg, sizeof(notify)))
+ break;
+
+ if (notify.port >= NR_EVENT_CHANNELS) {
+ rc = -EINVAL;
+ } else if (port_user[notify.port] != u) {
+ rc = -ENOTCONN;
+ } else {
+ notify_remote_via_evtchn(notify.port);
+ rc = 0;
+ }
+ break;
+ }
+
case IOCTL_EVTCHN_RESET: {
/* Initialise the ring to empty. Clear errors. */
u->ring_cons = u->ring_prod = u->ring_overflow = 0;
diff -r 4083eb31def0 -r 76a7a7aa27e4
linux-2.6-xen-sparse/include/asm-xen/linux-public/evtchn.h
--- a/linux-2.6-xen-sparse/include/asm-xen/linux-public/evtchn.h Thu Oct
6 15:07:52 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/linux-public/evtchn.h Thu Oct
6 16:02:38 2005
@@ -72,9 +72,18 @@
unsigned int port;
};
+/*
+ * Unbind previously allocated @port.
+ */
+#define IOCTL_EVTCHN_NOTIFY \
+ _IOC(_IOC_NONE, 'E', 4, sizeof(struct ioctl_evtchn_notify))
+struct ioctl_evtchn_notify {
+ unsigned int port;
+};
+
/* Clear and reinitialise the event buffer. Clear error condition. */
#define IOCTL_EVTCHN_RESET \
- _IOC(_IOC_NONE, 'E', 4, 0)
+ _IOC(_IOC_NONE, 'E', 5, 0)
#endif /* __LINUX_PUBLIC_EVTCHN_H__ */
diff -r 4083eb31def0 -r 76a7a7aa27e4 tools/console/daemon/io.c
--- a/tools/console/daemon/io.c Thu Oct 6 15:07:52 2005
+++ b/tools/console/daemon/io.c Thu Oct 6 16:02:38 2005
@@ -81,6 +81,13 @@
#define XENCONS_FULL(ring) (((ring)->prod - (ring)->cons) == XENCONS_RING_SIZE)
#define XENCONS_SPACE(ring) (XENCONS_RING_SIZE - ((ring)->prod - (ring)->cons))
+static void evtchn_notify(struct domain *dom)
+{
+ struct ioctl_evtchn_notify notify;
+ notify.port = dom->local_port;
+ (void)ioctl(dom->evtchn_fd, IOCTL_EVTCHN_NOTIFY, ¬ify);
+}
+
static void buffer_append(struct domain *dom)
{
struct buffer *buffer = &dom->buffer;
@@ -121,7 +128,7 @@
}
if (notify)
- xc_evtchn_send(xc, dom->local_port);
+ evtchn_notify(dom);
}
static bool buffer_empty(struct buffer *buffer)
@@ -440,7 +447,7 @@
inring->buf[XENCONS_IDX(inring->prod)] = msg[i];
inring->prod++;
}
- xc_evtchn_send(xc, dom->local_port);
+ evtchn_notify(dom);
} else {
close(dom->tty_fd);
dom->tty_fd = -1;
diff -r 4083eb31def0 -r 76a7a7aa27e4 tools/ioemu/target-i386-dm/helper2.c
--- a/tools/ioemu/target-i386-dm/helper2.c Thu Oct 6 15:07:52 2005
+++ b/tools/ioemu/target-i386-dm/helper2.c Thu Oct 6 16:02:38 2005
@@ -486,11 +486,9 @@
do_ioapic();
#endif
if (env->send_event) {
- int ret;
- ret = xc_evtchn_send(xc_handle, ioreq_local_port);
- if (ret == -1) {
- fprintf(logfile, "evtchn_send failed on port:
%d\n", ioreq_local_port);
- }
+ struct ioctl_evtchn_notify notify;
+ notify.port = ioreq_local_port;
+ (void)ioctl(evtchn_fd, IOCTL_EVTCHN_NOTIFY, ¬ify);
}
}
destroy_vmx_domain();
diff -r 4083eb31def0 -r 76a7a7aa27e4 tools/libxc/xc_evtchn.c
--- a/tools/libxc/xc_evtchn.c Thu Oct 6 15:07:52 2005
+++ b/tools/libxc/xc_evtchn.c Thu Oct 6 16:02:38 2005
@@ -33,92 +33,19 @@
int xc_evtchn_alloc_unbound(int xc_handle,
- u32 remote_dom,
u32 dom,
- int *port)
+ u32 remote_dom)
{
int rc;
evtchn_op_t op = {
.cmd = EVTCHNOP_alloc_unbound,
- .u.alloc_unbound.remote_dom = (domid_t)remote_dom,
- .u.alloc_unbound.dom = (domid_t)dom,
- .u.alloc_unbound.port = (port != NULL) ? *port : 0 };
+ .u.alloc_unbound.dom = (domid_t)dom,
+ .u.alloc_unbound.remote_dom = (domid_t)remote_dom };
if ( (rc = do_evtchn_op(xc_handle, &op)) == 0 )
- {
- if ( port != NULL )
- *port = op.u.alloc_unbound.port;
- }
+ rc = op.u.alloc_unbound.port;
return rc;
-}
-
-
-int xc_evtchn_bind_interdomain(int xc_handle,
- u32 dom1,
- u32 dom2,
- int *port1,
- int *port2)
-{
- int rc;
- evtchn_op_t op = {
- .cmd = EVTCHNOP_bind_interdomain,
- .u.bind_interdomain.dom1 = (domid_t)dom1,
- .u.bind_interdomain.dom2 = (domid_t)dom2,
- .u.bind_interdomain.port1 = (port1 != NULL) ? *port1 : 0,
- .u.bind_interdomain.port2 = (port2 != NULL) ? *port2 : 0 };
-
- if ( (rc = do_evtchn_op(xc_handle, &op)) == 0 )
- {
- if ( port1 != NULL )
- *port1 = op.u.bind_interdomain.port1;
- if ( port2 != NULL )
- *port2 = op.u.bind_interdomain.port2;
- }
-
- return rc;
-}
-
-
-int xc_evtchn_bind_virq(int xc_handle,
- int virq,
- int *port)
-{
- int rc;
- evtchn_op_t op = {
- .cmd = EVTCHNOP_bind_virq,
- .u.bind_virq.virq = (u32)virq,
- .u.bind_virq.vcpu = 0 };
-
- if ( (rc = do_evtchn_op(xc_handle, &op)) == 0 )
- {
- if ( port != NULL )
- *port = op.u.bind_virq.port;
- }
-
- return rc;
-}
-
-
-int xc_evtchn_close(int xc_handle,
- u32 dom,
- int port)
-{
- evtchn_op_t op = {
- .cmd = EVTCHNOP_close,
- .u.close.dom = (domid_t)dom,
- .u.close.port = port };
- return do_evtchn_op(xc_handle, &op);
-}
-
-
-int xc_evtchn_send(int xc_handle,
- int local_port)
-{
- evtchn_op_t op = {
- .cmd = EVTCHNOP_send,
- .u.send.local_port = local_port };
- return do_evtchn_op(xc_handle, &op);
}
diff -r 4083eb31def0 -r 76a7a7aa27e4 tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h Thu Oct 6 15:07:52 2005
+++ b/tools/libxc/xenctrl.h Thu Oct 6 16:02:38 2005
@@ -306,68 +306,14 @@
* well-known port within a domain to receive events on.
*
* @parm xc_handle a handle to an open hypervisor interface
+ * @parm dom the ID of the local domain (the 'allocatee')
* @parm remote_dom the ID of the domain who will later bind
- * @parm dom the ID of the local domain (the 'allocatee')
- * @parm port a pointer to a port. This is an in/out parameter. If *port is
- * 0, then a new port will be assigned, if port is > 0 then that
- * port is allocated if the port is unallocated.
- * @return 0 on success, -1 on failure
+ * @return allocated port (in @dom) on success, -1 on failure
*/
int xc_evtchn_alloc_unbound(int xc_handle,
- u32 remote_dom,
u32 dom,
- int *port);
-
-/**
- * This function creates a pair of ports between two domains. A port can only
- * be bound once within a domain.
- *
- * @parm xc_handle a handle to an open hypervisor interface
- * @parm dom1 one of the two domains to connect. Can be DOMID_SELF.
- * @parm dom2 the other domain to connect. Can be DOMID_SELF.
- * @parm port1 an in/out parameter. If > 0, then try to connect *port. If
- * 0, then allocate a new port and store the port in *port.
- * @parm port2 the port connected on port2. This parameter behaves the same
- * way as port1.
- * @return 0 on success, -1 on error.
- */
-int xc_evtchn_bind_interdomain(int xc_handle,
- u32 dom1,
- u32 dom2,
- int *port1,
- int *port2);
-int xc_evtchn_bind_virq(int xc_handle,
- int virq,
- int *port);
-
-/**
- * This function will close a single port on an event channel.
- *
- * @parm xc_handle a handle to an open hypervisor interface
- * @parm dom the domain that the port exists on. May be DOMID_SELF.
- * @parm port the port to close
- * @return 0 on success, -1 on error
- */
-int xc_evtchn_close(int xc_handle,
- u32 dom, /* may be DOMID_SELF */
- int port);
-
-/**
- * This function generates a notify event on a bound port.
- *
- * Notifies can be read within Linux by opening /dev/xen/evtchn and reading
- * a 16 bit value. The result will be the port the event occurred on. When
- * events occur, the port is masked until the 16 bit port value is written back
- * to the file. When /dev/xen/evtchn is opened, it has to be bound via an
- * ioctl to each port to listen on. The ioctl for binding is _IO('E', 2). The
- * parameter is the port to listen on.
- *
- * @parm xc_handle a handle to an open hypervisor interface
- * @parm local_port the port to generate the notify on
- * @return 0 on success, -1 on error
- */
-int xc_evtchn_send(int xc_handle,
- int local_port);
+ u32 remote_dom);
+
int xc_evtchn_status(int xc_handle,
u32 dom, /* may be DOMID_SELF */
int port,
diff -r 4083eb31def0 -r 76a7a7aa27e4 tools/python/xen/lowlevel/xc/xc.c
--- a/tools/python/xen/lowlevel/xc/xc.c Thu Oct 6 15:07:52 2005
+++ b/tools/python/xen/lowlevel/xc/xc.c Thu Oct 6 16:02:38 2005
@@ -433,7 +433,7 @@
XcObject *xc = (XcObject *)self;
u32 dom = DOMID_SELF, remote_dom;
- int port = 0;
+ int port;
static char *kwd_list[] = { "remote_dom", "dom", NULL };
@@ -441,95 +441,10 @@
&remote_dom, &dom) )
return NULL;
- if ( xc_evtchn_alloc_unbound(xc->xc_handle, remote_dom, dom, &port) != 0 )
+ if ( (port = xc_evtchn_alloc_unbound(xc->xc_handle, dom, remote_dom)) < 0 )
return PyErr_SetFromErrno(xc_error);
return PyInt_FromLong(port);
-}
-
-static PyObject *pyxc_evtchn_bind_interdomain(PyObject *self,
- PyObject *args,
- PyObject *kwds)
-{
- XcObject *xc = (XcObject *)self;
-
- u32 dom1 = DOMID_SELF, dom2 = DOMID_SELF;
- int port1 = 0, port2 = 0;
-
- static char *kwd_list[] = { "dom1", "dom2", "port1", "port2", NULL };
-
- if ( !PyArg_ParseTupleAndKeywords(args, kwds, "|iiii", kwd_list,
- &dom1, &dom2, &port1, &port2) )
- return NULL;
-
- if ( xc_evtchn_bind_interdomain(xc->xc_handle, dom1,
- dom2, &port1, &port2) != 0 )
- return PyErr_SetFromErrno(xc_error);
-
- return Py_BuildValue("{s:i,s:i}",
- "port1", port1,
- "port2", port2);
-}
-
-static PyObject *pyxc_evtchn_bind_virq(PyObject *self,
- PyObject *args,
- PyObject *kwds)
-{
- XcObject *xc = (XcObject *)self;
-
- int virq, port;
-
- static char *kwd_list[] = { "virq", NULL };
-
- if ( !PyArg_ParseTupleAndKeywords(args, kwds, "i", kwd_list, &virq) )
- return NULL;
-
- if ( xc_evtchn_bind_virq(xc->xc_handle, virq, &port) != 0 )
- return PyErr_SetFromErrno(xc_error);
-
- return PyInt_FromLong(port);
-}
-
-static PyObject *pyxc_evtchn_close(PyObject *self,
- PyObject *args,
- PyObject *kwds)
-{
- XcObject *xc = (XcObject *)self;
-
- u32 dom = DOMID_SELF;
- int port;
-
- static char *kwd_list[] = { "port", "dom", NULL };
-
- if ( !PyArg_ParseTupleAndKeywords(args, kwds, "i|i", kwd_list,
- &port, &dom) )
- return NULL;
-
- if ( xc_evtchn_close(xc->xc_handle, dom, port) != 0 )
- return PyErr_SetFromErrno(xc_error);
-
- Py_INCREF(zero);
- return zero;
-}
-
-static PyObject *pyxc_evtchn_send(PyObject *self,
- PyObject *args,
- PyObject *kwds)
-{
- XcObject *xc = (XcObject *)self;
-
- int port;
-
- static char *kwd_list[] = { "port", NULL };
-
- if ( !PyArg_ParseTupleAndKeywords(args, kwds, "i", kwd_list, &port) )
- return NULL;
-
- if ( xc_evtchn_send(xc->xc_handle, port) != 0 )
- return PyErr_SetFromErrno(xc_error);
-
- Py_INCREF(zero);
- return zero;
}
static PyObject *pyxc_evtchn_status(PyObject *self,
@@ -1032,38 +947,6 @@
" dom [int]: Remote domain to accept connections from.\n\n"
"Returns: [int] Unbound event-channel port.\n" },
- { "evtchn_bind_interdomain",
- (PyCFunction)pyxc_evtchn_bind_interdomain,
- METH_VARARGS | METH_KEYWORDS, "\n"
- "Open an event channel between two domains.\n"
- " dom1 [int, SELF]: First domain to be connected.\n"
- " dom2 [int, SELF]: Second domain to be connected.\n\n"
- "Returns: [dict] dictionary is empty on failure.\n"
- " port1 [int]: Port-id for endpoint at dom1.\n"
- " port2 [int]: Port-id for endpoint at dom2.\n" },
-
- { "evtchn_bind_virq",
- (PyCFunction)pyxc_evtchn_bind_virq,
- METH_VARARGS | METH_KEYWORDS, "\n"
- "Bind an event channel to the specified VIRQ.\n"
- " virq [int]: VIRQ to bind.\n\n"
- "Returns: [int] Bound event-channel port.\n" },
-
- { "evtchn_close",
- (PyCFunction)pyxc_evtchn_close,
- METH_VARARGS | METH_KEYWORDS, "\n"
- "Close an event channel. If interdomain, sets remote end to 'unbound'.\n"
- " dom [int, SELF]: Dom-id of one endpoint of the channel.\n"
- " port [int]: Port-id of one endpoint of the channel.\n\n"
- "Returns: [int] 0 on success; -1 on error.\n" },
-
- { "evtchn_send",
- (PyCFunction)pyxc_evtchn_send,
- METH_VARARGS | METH_KEYWORDS, "\n"
- "Send an event along a locally-connected event channel.\n"
- " port [int]: Port-id of a local channel endpoint.\n\n"
- "Returns: [int] 0 on success; -1 on error.\n" },
-
{ "evtchn_status",
(PyCFunction)pyxc_evtchn_status,
METH_VARARGS | METH_KEYWORDS, "\n"
diff -r 4083eb31def0 -r 76a7a7aa27e4 tools/xenstore/Makefile
--- a/tools/xenstore/Makefile Thu Oct 6 15:07:52 2005
+++ b/tools/xenstore/Makefile Thu Oct 6 16:02:38 2005
@@ -29,7 +29,7 @@
all: libxenstore.so xenstored $(CLIENTS) xs_tdb_dump
-testcode: xs_test xenstored_test xs_random xs_dom0_test
+testcode: xs_test xenstored_test xs_random
xenstored: xenstored_core.o xenstored_watch.o xenstored_domain.o
xenstored_transaction.o xs_lib.o talloc.o utils.o tdb.o
$(LINK.o) $^ $(LOADLIBES) $(LDLIBS) -lxenctrl -o $@
@@ -74,7 +74,7 @@
clean: testsuite-clean
rm -f *.o *.opic *.so
rm -f xenstored xs_random xs_stress xs_crashme
- rm -f xs_test xenstored_test xs_dom0_test
+ rm -f xs_test xenstored_test
$(RM) $(PROG_DEP)
print-dir:
@@ -120,9 +120,6 @@
rm -rf $(TESTDIR)/store $(TESTDIR)/transactions
export $(TESTENV); PID=`./xenstored_test --output-pid
--trace-file=/tmp/trace`; ./xs_stress 5000; ret=$$?; kill $$PID; exit $$ret
-xs_dom0_test: xs_dom0_test.o utils.o
- $(LINK.o) $^ $(LOADLIBES) $(LDLIBS) -lxenctrl -o $@
-
TAGS:
etags `find . -name '*.[ch]'`
diff -r 4083eb31def0 -r 76a7a7aa27e4 tools/xenstore/fake_libxc.c
--- a/tools/xenstore/fake_libxc.c Thu Oct 6 15:07:52 2005
+++ b/tools/xenstore/fake_libxc.c Thu Oct 6 16:02:38 2005
@@ -36,12 +36,11 @@
static u16 port;
/* The event channel maps to a signal, shared page to an mmapped file. */
-int xc_evtchn_send(int xc_handle __attribute__((unused)), int local_port)
+void evtchn_notify(int local_port)
{
assert(local_port == port);
if (kill(xs_test_pid, SIGUSR2) != 0)
barf_perror("fake event channel failed");
- return 0;
}
void *xc_map_foreign_range(int xc_handle, u32 dom __attribute__((unused)),
@@ -107,15 +106,6 @@
return 1;
}
-int xc_evtchn_bind_virq(int xc_handle __attribute__((unused)),
- int virq __attribute__((unused)),
- int *port)
-{
- if (port)
- *port = 0;
- return 0;
-}
-
static void send_to_fd(int signo __attribute__((unused)))
{
int saved_errno = errno;
diff -r 4083eb31def0 -r 76a7a7aa27e4 tools/xenstore/xenstored_core.c
--- a/tools/xenstore/xenstored_core.c Thu Oct 6 15:07:52 2005
+++ b/tools/xenstore/xenstored_core.c Thu Oct 6 16:02:38 2005
@@ -51,6 +51,8 @@
#include "xenstored_domain.h"
#include "xenctrl.h"
#include "tdb.h"
+
+int event_fd;
static bool verbose;
LIST_HEAD(connections);
@@ -309,8 +311,7 @@
return 0;
}
-static int initialize_set(fd_set *inset, fd_set *outset, int sock, int ro_sock,
- int event_fd)
+static int initialize_set(fd_set *inset, fd_set *outset, int sock, int ro_sock)
{
struct connection *i;
int max;
@@ -1464,7 +1465,7 @@
int main(int argc, char *argv[])
{
- int opt, *sock, *ro_sock, event_fd, max;
+ int opt, *sock, *ro_sock, max;
struct sockaddr_un addr;
fd_set inset, outset;
bool dofork = true;
@@ -1568,7 +1569,7 @@
#endif
/* Get ready to listen to the tools. */
- max = initialize_set(&inset, &outset, *sock, *ro_sock, event_fd);
+ max = initialize_set(&inset, &outset, *sock, *ro_sock);
/* Main loop. */
/* FIXME: Rewrite so noone can starve. */
@@ -1588,7 +1589,7 @@
accept_connection(*ro_sock, false);
if (FD_ISSET(event_fd, &inset))
- handle_event(event_fd);
+ handle_event();
list_for_each_entry(i, &connections, list) {
if (i->domain)
@@ -1624,7 +1625,6 @@
}
}
- max = initialize_set(&inset, &outset, *sock, *ro_sock,
- event_fd);
- }
-}
+ max = initialize_set(&inset, &outset, *sock, *ro_sock);
+ }
+}
diff -r 4083eb31def0 -r 76a7a7aa27e4 tools/xenstore/xenstored_core.h
--- a/tools/xenstore/xenstored_core.h Thu Oct 6 15:07:52 2005
+++ b/tools/xenstore/xenstored_core.h Thu Oct 6 16:02:38 2005
@@ -173,4 +173,6 @@
void trace_watch_timeout(const struct connection *conn, const char *node,
const char *token);
void trace(const char *fmt, ...);
+extern int event_fd;
+
#endif /* _XENSTORED_CORE_H */
diff -r 4083eb31def0 -r 76a7a7aa27e4 tools/xenstore/xenstored_domain.c
--- a/tools/xenstore/xenstored_domain.c Thu Oct 6 15:07:52 2005
+++ b/tools/xenstore/xenstored_domain.c Thu Oct 6 16:02:38 2005
@@ -79,6 +79,17 @@
char buf[0];
} __attribute__((packed));
+#ifndef TESTING
+static void evtchn_notify(int port)
+{
+ struct ioctl_evtchn_notify notify;
+ notify.port = port;
+ (void)ioctl(event_fd, IOCTL_EVTCHN_NOTIFY, ¬ify);
+}
+#else
+extern void evtchn_notify(int port);
+#endif
+
/* FIXME: Mark connection as broken (close it?) when this happens. */
static bool check_buffer(const struct ringbuf_head *h)
{
@@ -164,9 +175,7 @@
memcpy(dest, data, len);
mb();
update_output_chunk(conn->domain->output, len);
- /* FIXME: Probably not neccessary. */
- mb();
- xc_evtchn_send(*xc_handle, conn->domain->port);
+ evtchn_notify(conn->domain->port);
return len;
}
@@ -199,7 +208,7 @@
/* If it was full, tell them we've taken some. */
if (was_full)
- xc_evtchn_send(*xc_handle, conn->domain->port);
+ evtchn_notify(conn->domain->port);
return len;
}
@@ -249,7 +258,7 @@
}
/* We scan all domains rather than use the information given here. */
-void handle_event(int event_fd)
+void handle_event(void)
{
u16 port;
diff -r 4083eb31def0 -r 76a7a7aa27e4 tools/xenstore/xenstored_domain.h
--- a/tools/xenstore/xenstored_domain.h Thu Oct 6 15:07:52 2005
+++ b/tools/xenstore/xenstored_domain.h Thu Oct 6 16:02:38 2005
@@ -20,7 +20,7 @@
#ifndef _XENSTORED_DOMAIN_H
#define _XENSTORED_DOMAIN_H
-void handle_event(int event_fd);
+void handle_event(void);
/* domid, mfn, eventchn, path */
void do_introduce(struct connection *conn, struct buffered_data *in);
diff -r 4083eb31def0 -r 76a7a7aa27e4 tools/xenstore/xs_dom0_test.c
--- a/tools/xenstore/xs_dom0_test.c Thu Oct 6 15:07:52 2005
+++ /dev/null Thu Oct 6 16:02:38 2005
@@ -1,43 +0,0 @@
-/* Test introduction of domain 0 */
-#include <linux/ioctl.h>
-#include <sys/ioctl.h>
-#include "xs.h"
-#include "utils.h"
-#include <xenctrl.h>
-#include <xen/linux/privcmd.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <sys/mman.h>
-
-int main()
-{
- int h, local = 0, kernel = 0;
- long err;
- void *page;
-
- h = xc_interface_open();
- if (h < 0)
- barf_perror("Failed to open xc");
-
- if (xc_evtchn_bind_interdomain(h, DOMID_SELF, 0, &local, &kernel) != 0)
- barf_perror("Failed to bind interdomain");
-
- printf("Got ports %i & %i\n", local, kernel);
-
- err = ioctl(h, IOCTL_PRIVCMD_INITDOMAIN_STORE, kernel);
- if (err < 0)
- barf_perror("Failed to initialize store");
- printf("Got mfn %li\n", err);
-
- page = xc_map_foreign_range(h, 0, getpagesize(), PROT_READ|PROT_WRITE,
- err);
- if (!page)
- barf_perror("Failed to map page %li", err);
- printf("Mapped page at %p\n", page);
- printf("Page says %s\n", (char *)page);
- munmap(page, getpagesize());
- printf("unmapped\n");
-
- return 0;
-}
-
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