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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] Mini-OS to use evtchn_port_t for ports and other improvements
The enclosed patch modifies Mini-OS so it uses evtchn_port_t for
ports, instead of the current mixture of u32's and int's. It provides
a name for the type of an event channel handler in events.h. It
modifies evtchn_alloc_unbound so that it can be used to set up an
event channel to a domain other than zero. It adds
evtchn_bind_interdomain to support the other half of event channel set
up. Finally, adds a routine that translates grant table operation
status values to their string equivalent.
John
Signed-off-by: John D. Ramsdell <ramsdell@xxxxxxxxx>
Only in xen-unstable/extras/mini-os/console: console.o
diff -ur oxen-unstable/extras/mini-os/console/xencons_ring.c
xen-unstable/extras/mini-os/console/xencons_ring.c
--- oxen-unstable/extras/mini-os/console/xencons_ring.c 2006-07-22
01:09:59.000000000 -0400
+++ xen-unstable/extras/mini-os/console/xencons_ring.c 2006-07-22
17:11:09.000000000 -0400
@@ -53,7 +53,7 @@
-static void handle_input(int port, struct pt_regs *regs, void *ign)
+static void handle_input(evtchn_port_t port, struct pt_regs *regs, void *ign)
{
struct xencons_interface *intf = xencons_interface();
XENCONS_RING_IDX cons, prod;
Only in xen-unstable/extras/mini-os/console: xencons_ring.c~
Only in xen-unstable/extras/mini-os/console: xencons_ring.o
diff -ur oxen-unstable/extras/mini-os/events.c
xen-unstable/extras/mini-os/events.c
--- oxen-unstable/extras/mini-os/events.c 2006-07-22 01:09:59.000000000
-0400
+++ xen-unstable/extras/mini-os/events.c 2006-07-22 17:09:34.000000000
-0400
@@ -26,20 +26,20 @@
/* this represents a event handler. Chaining or sharing is not allowed */
typedef struct _ev_action_t {
- void (*handler)(int, struct pt_regs *, void *);
+ evtchn_handler_t handler;
void *data;
u32 count;
} ev_action_t;
static ev_action_t ev_actions[NR_EVS];
-void default_handler(int port, struct pt_regs *regs, void *data);
+void default_handler(evtchn_port_t port, struct pt_regs *regs, void *data);
/*
* Demux events to different handlers.
*/
-int do_event(u32 port, struct pt_regs *regs)
+int do_event(evtchn_port_t port, struct pt_regs *regs)
{
ev_action_t *action;
if (port >= NR_EVS) {
@@ -60,8 +60,8 @@
}
-int bind_evtchn( u32 port, void (*handler)(int, struct pt_regs *, void *),
- void *data )
+evtchn_port_t bind_evtchn(evtchn_port_t port, evtchn_handler_t handler,
+ void *data)
{
if(ev_actions[port].handler != default_handler)
printk("WARN: Handler for port %d already registered, replacing\n",
@@ -77,7 +77,7 @@
return port;
}
-void unbind_evtchn( u32 port )
+void unbind_evtchn(evtchn_port_t port)
{
if (ev_actions[port].handler == default_handler)
printk("WARN: No handler for port %d when unbinding\n", port);
@@ -86,8 +86,7 @@
ev_actions[port].data = NULL;
}
-int bind_virq( u32 virq, void (*handler)(int, struct pt_regs *, void *data),
- void *data)
+int bind_virq(evtchn_port_t virq, evtchn_handler_t handler, void *data)
{
evtchn_op_t op;
@@ -105,7 +104,7 @@
return 0;
}
-void unbind_virq( u32 port )
+void unbind_virq(evtchn_port_t port)
{
unbind_evtchn(port);
}
@@ -142,32 +141,57 @@
}
}
-void default_handler(int port, struct pt_regs *regs, void *ignore)
+void default_handler(evtchn_port_t port, struct pt_regs *regs, void *ignore)
{
printk("[Port %d] - event received\n", port);
}
+/* Create a port available to the pal for exchanging notifications.
+ Returns the result of the hypervisor call. */
+
/* Unfortunate confusion of terminology: the port is unbound as far
as Xen is concerned, but we automatically bind a handler to it
from inside mini-os. */
-int evtchn_alloc_unbound(void (*handler)(int, struct pt_regs *regs,
-
void *data),
- void *data)
-{
- u32 port;
- evtchn_op_t op;
- int err;
- op.cmd = EVTCHNOP_alloc_unbound;
- op.u.alloc_unbound.dom = DOMID_SELF;
- op.u.alloc_unbound.remote_dom = 0;
-
- err = HYPERVISOR_event_channel_op(&op);
- if (err) {
- printk("Failed to alloc unbound evtchn: %d.\n", err);
- return -1;
- }
- port = op.u.alloc_unbound.port;
- bind_evtchn(port, handler, data);
- return port;
+static inline evtchn_port_t
+maybe_bind_evtchn(evtchn_port_t port, evtchn_handler_t handler, void *data)
+{
+ if (handler)
+ return bind_evtchn(port, handler, data);
+ else
+ return port;
+}
+
+int evtchn_alloc_unbound(domid_t pal, evtchn_handler_t handler,
+ void *data, evtchn_port_t
*port)
+{
+ evtchn_op_t op;
+ op.cmd = EVTCHNOP_alloc_unbound;
+ op.u.alloc_unbound.dom = DOMID_SELF;
+ op.u.alloc_unbound.remote_dom = pal;
+ int err = HYPERVISOR_event_channel_op(&op);
+ if (err)
+ return err;
+ *port = maybe_bind_evtchn(op.u.alloc_unbound.port, handler, data);
+ return err;
+}
+
+/* Connect to a port so as to allow the exchange of notifications with
+ the pal. Returns the result of the hypervisor call. */
+
+int evtchn_bind_interdomain(domid_t pal, evtchn_port_t remote_port,
+ evtchn_handler_t
handler, void *data,
+ evtchn_port_t
*local_port)
+{
+ evtchn_op_t op;
+ op.cmd = EVTCHNOP_bind_interdomain;
+ op.u.bind_interdomain.remote_dom = pal;
+ op.u.bind_interdomain.remote_port = remote_port;
+ int err = HYPERVISOR_event_channel_op(&op);
+ if (err)
+ return err;
+ evtchn_port_t port = op.u.bind_interdomain.local_port;
+ clear_evtchn(port); /* Without, handler gets invoked now! */
+ *local_port = maybe_bind_evtchn(port, handler, data);
+ return err;
}
Only in xen-unstable/extras/mini-os: events.o
diff -ur oxen-unstable/extras/mini-os/gnttab.c
xen-unstable/extras/mini-os/gnttab.c
--- oxen-unstable/extras/mini-os/gnttab.c 2006-07-22 01:09:59.000000000
-0400
+++ xen-unstable/extras/mini-os/gnttab.c 2006-07-22 16:41:12.000000000
-0400
@@ -137,6 +137,24 @@
return gref;
}
+static char *gnttabop_error_msgs[] = GNTTABOP_error_msgs;
+
+static const size_t gnttabop_error_size =
+ sizeof(gnttabop_error_msgs)/sizeof(gnttabop_error_msgs[0]);
+
+const char *
+gnttabop_error(int16_t status)
+{
+ status = -status;
+ if (status < 0 || status >= gnttabop_error_size)
+ return "bad status";
+ const char *msg = gnttabop_error_msgs[status];
+ if (msg)
+ return msg;
+ else
+ return "bad status";
+}
+
void
init_gnttab(void)
{
Only in xen-unstable/extras/mini-os: gnttab.o
Only in xen-unstable/extras/mini-os: hypervisor.o
diff -ur oxen-unstable/extras/mini-os/include/events.h
xen-unstable/extras/mini-os/include/events.h
--- oxen-unstable/extras/mini-os/include/events.h 2006-07-22
01:09:59.000000000 -0400
+++ xen-unstable/extras/mini-os/include/events.h 2006-07-22
17:08:38.000000000 -0400
@@ -22,20 +22,24 @@
#include<traps.h>
#include <xen/event_channel.h>
+typedef void (*evtchn_handler_t)(evtchn_port_t, struct pt_regs *, void *);
+
/* prototypes */
-int do_event(u32 port, struct pt_regs *regs);
-int bind_virq( u32 virq, void (*handler)(int, struct pt_regs *, void *data),
- void *data);
-int bind_evtchn( u32 virq, void (*handler)(int, struct pt_regs *, void *data),
- void *data );
-void unbind_evtchn( u32 port );
+int do_event(evtchn_port_t port, struct pt_regs *regs);
+int bind_virq(evtchn_port_t virq, evtchn_handler_t handler, void *data);
+evtchn_port_t bind_evtchn(evtchn_port_t virq, evtchn_handler_t handler,
+ void *data);
+void unbind_evtchn(evtchn_port_t port);
void init_events(void);
-void unbind_virq( u32 port );
-int evtchn_alloc_unbound(void (*handler)(int, struct pt_regs *regs,
-
void *data),
- void *data);
+void unbind_virq(evtchn_port_t port);
+int evtchn_alloc_unbound(domid_t pal, evtchn_handler_t handler,
+ void *data, evtchn_port_t
*port);
+
+int evtchn_bind_interdomain(domid_t pal, evtchn_port_t remote_port,
+ evtchn_handler_t
handler, void *data,
+ evtchn_port_t
*local_port);
-static inline int notify_remote_via_evtchn(int port)
+static inline int notify_remote_via_evtchn(evtchn_port_t port)
{
evtchn_op_t op;
op.cmd = EVTCHNOP_send;
Only in xen-unstable/extras/mini-os/include: events.h~
diff -ur oxen-unstable/extras/mini-os/include/gnttab.h
xen-unstable/extras/mini-os/include/gnttab.h
--- oxen-unstable/extras/mini-os/include/gnttab.h 2006-07-22
01:09:59.000000000 -0400
+++ xen-unstable/extras/mini-os/include/gnttab.h 2006-07-22
16:41:25.000000000 -0400
@@ -10,5 +10,6 @@
grant_ref_t gnttab_grant_transfer(domid_t domid, unsigned long pfn);
unsigned long gnttab_end_transfer(grant_ref_t gref);
int gnttab_end_access(grant_ref_t ref);
+const char *gnttabop_error(int16_t status);
#endif /* !__GNTTAB_H__ */
Only in xen-unstable/extras/mini-os/include: gnttab.h~
Only in xen-unstable/extras/mini-os/include: xen
Only in xen-unstable/extras/mini-os: kernel.o
Only in xen-unstable/extras/mini-os/lib: math.o
Only in xen-unstable/extras/mini-os/lib: printf.o
Only in xen-unstable/extras/mini-os/lib: string.o
Only in xen-unstable/extras/mini-os/lib: xmalloc.o
Only in xen-unstable/extras/mini-os: libminios.a
Only in xen-unstable/extras/mini-os: mini-os.elf
Only in xen-unstable/extras/mini-os: mini-os.gz
Only in xen-unstable/extras/mini-os: mm.o
Only in xen-unstable/extras/mini-os: sched.o
diff -ur oxen-unstable/extras/mini-os/time.c xen-unstable/extras/mini-os/time.c
--- oxen-unstable/extras/mini-os/time.c 2006-07-22 01:09:59.000000000 -0400
+++ xen-unstable/extras/mini-os/time.c 2006-07-22 17:10:15.000000000 -0400
@@ -215,7 +215,7 @@
/*
* Just a dummy
*/
-static void timer_handler(int ev, struct pt_regs *regs, void *ign)
+static void timer_handler(evtchn_port_t ev, struct pt_regs *regs, void *ign)
{
static int i;
Only in xen-unstable/extras/mini-os: time.o
Only in xen-unstable/extras/mini-os: traps.o
Only in xen-unstable/extras/mini-os: x86_32.o
diff -ur oxen-unstable/extras/mini-os/xenbus/xenbus.c
xen-unstable/extras/mini-os/xenbus/xenbus.c
--- oxen-unstable/extras/mini-os/xenbus/xenbus.c 2006-07-22
01:09:59.000000000 -0400
+++ xen-unstable/extras/mini-os/xenbus/xenbus.c 2006-07-22 17:10:48.000000000
-0400
@@ -112,7 +112,8 @@
}
}
-static void xenbus_evtchn_handler(int port, struct pt_regs *regs, void *ign)
+static void xenbus_evtchn_handler(evtchn_port_t port, struct pt_regs *regs,
+ void *ign)
{
wake_up(&xb_waitq);
}
Only in xen-unstable/extras/mini-os/xenbus: xenbus.c~
Only in xen-unstable/extras/mini-os/xenbus: xenbus.o
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