Date: Thu, 2 Jan 2014 16:43:37 +0100 From: Roger Pau Monne <roger.pau@citrix.com> To: <freebsd-xen@freebsd.org>, <freebsd-current@freebsd.org>, <xen-devel@lists.xen.org>, <gibbs@freebsd.org>, <jhb@freebsd.org>, <kib@freebsd.org>, <julien.grall@citrix.com> Cc: Roger Pau Monne <roger.pau@citrix.com> Subject: [PATCH v9 03/19] xen: add and enable Xen console for PVH guests Message-ID: <1388677433-49525-4-git-send-email-roger.pau@citrix.com> In-Reply-To: <1388677433-49525-1-git-send-email-roger.pau@citrix.com> References: <1388677433-49525-1-git-send-email-roger.pau@citrix.com>
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This adds and enables the console used on XEN kernels.
---
sys/conf/files | 4 +-
sys/dev/xen/console/console.c | 37 +++++++++++++++++++++++++++++------
sys/dev/xen/console/xencons_ring.c | 15 +++++++++----
sys/i386/include/xen/xen-os.h | 1 -
sys/i386/xen/xen_machdep.c | 17 ----------------
sys/x86/xen/pv.c | 4 +++
sys/xen/xen-os.h | 4 +++
7 files changed, 50 insertions(+), 32 deletions(-)
diff --git a/sys/conf/files b/sys/conf/files
index a73d31e..f55479d 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -2523,8 +2523,8 @@ dev/xe/if_xe_pccard.c optional xe pccard
dev/xen/balloon/balloon.c optional xen | xenhvm
dev/xen/blkfront/blkfront.c optional xen | xenhvm
dev/xen/blkback/blkback.c optional xen | xenhvm
-dev/xen/console/console.c optional xen
-dev/xen/console/xencons_ring.c optional xen
+dev/xen/console/console.c optional xen | xenhvm
+dev/xen/console/xencons_ring.c optional xen | xenhvm
dev/xen/control/control.c optional xen | xenhvm
dev/xen/netback/netback.c optional xen | xenhvm
dev/xen/netfront/netfront.c optional xen | xenhvm
diff --git a/sys/dev/xen/console/console.c b/sys/dev/xen/console/console.c
index 23eaee2..899dffc 100644
--- a/sys/dev/xen/console/console.c
+++ b/sys/dev/xen/console/console.c
@@ -69,11 +69,14 @@ struct mtx cn_mtx;
static char wbuf[WBUF_SIZE];
static char rbuf[RBUF_SIZE];
static int rc, rp;
-static unsigned int cnsl_evt_reg;
+unsigned int cnsl_evt_reg;
static unsigned int wc, wp; /* write_cons, write_prod */
xen_intr_handle_t xen_intr_handle;
device_t xencons_dev;
+/* Virtual address of the shared console page */
+char *console_page;
+
#ifdef KDB
static int xc_altbrk;
#endif
@@ -110,9 +113,26 @@ static struct ttydevsw xc_ttydevsw = {
.tsw_outwakeup = xcoutwakeup,
};
+/*----------------------------- Debug function -------------------------------*/
+#define XC_PRINTF_BUFSIZE 1024
+void
+xc_printf(const char *fmt, ...)
+{
+ static char buf[XC_PRINTF_BUFSIZE];
+ __va_list ap;
+
+ va_start(ap, fmt);
+ vsnprintf(buf, sizeof(buf), fmt, ap);
+ va_end(ap);
+ HYPERVISOR_console_write(buf, strlen(buf));
+}
+
static void
xc_cnprobe(struct consdev *cp)
{
+ if (!xen_pv_domain())
+ return;
+
cp->cn_pri = CN_REMOTE;
sprintf(cp->cn_name, "%s0", driver_name);
}
@@ -175,7 +195,7 @@ static void
xc_cnputc(struct consdev *dev, int c)
{
- if (xen_start_info->flags & SIF_INITDOMAIN)
+ if (xen_initial_domain())
xc_cnputc_dom0(dev, c);
else
xc_cnputc_domu(dev, c);
@@ -206,8 +226,7 @@ xcons_putc(int c)
xcons_force_flush();
#endif
}
- if (cnsl_evt_reg)
- __xencons_tx_flush();
+ __xencons_tx_flush();
/* inform start path that we're pretty full */
return ((wp - wc) >= WBUF_SIZE - 100) ? TRUE : FALSE;
@@ -217,6 +236,10 @@ static void
xc_identify(driver_t *driver, device_t parent)
{
device_t child;
+
+ if (!xen_pv_domain())
+ return;
+
child = BUS_ADD_CHILD(parent, 0, driver_name, 0);
device_set_driver(child, driver);
device_set_desc(child, "Xen Console");
@@ -245,7 +268,7 @@ xc_attach(device_t dev)
cnsl_evt_reg = 1;
callout_reset(&xc_callout, XC_POLLTIME, xc_timeout, xccons);
- if (xen_start_info->flags & SIF_INITDOMAIN) {
+ if (xen_initial_domain()) {
error = xen_intr_bind_virq(dev, VIRQ_CONSOLE, 0, NULL,
xencons_priv_interrupt, NULL,
INTR_TYPE_TTY, &xen_intr_handle);
@@ -309,7 +332,7 @@ __xencons_tx_flush(void)
sz = wp - wc;
if (sz > (WBUF_SIZE - WBUF_MASK(wc)))
sz = WBUF_SIZE - WBUF_MASK(wc);
- if (xen_start_info->flags & SIF_INITDOMAIN) {
+ if (xen_initial_domain()) {
HYPERVISOR_console_io(CONSOLEIO_write, sz, &wbuf[WBUF_MASK(wc)]);
wc += sz;
} else {
@@ -424,7 +447,7 @@ xcons_force_flush(void)
{
int sz;
- if (xen_start_info->flags & SIF_INITDOMAIN)
+ if (xen_initial_domain())
return;
/* Spin until console data is flushed through to the domain controller. */
diff --git a/sys/dev/xen/console/xencons_ring.c b/sys/dev/xen/console/xencons_ring.c
index 3701551..d826363 100644
--- a/sys/dev/xen/console/xencons_ring.c
+++ b/sys/dev/xen/console/xencons_ring.c
@@ -32,9 +32,9 @@ __FBSDID("$FreeBSD$");
#define console_evtchn console.domU.evtchn
xen_intr_handle_t console_handle;
-extern char *console_page;
extern struct mtx cn_mtx;
extern device_t xencons_dev;
+extern int cnsl_evt_reg;
static inline struct xencons_interface *
xencons_interface(void)
@@ -60,6 +60,8 @@ xencons_ring_send(const char *data, unsigned len)
struct xencons_interface *intf;
XENCONS_RING_IDX cons, prod;
int sent;
+ struct evtchn_send send = { .port =
+ HYPERVISOR_start_info->console_evtchn };
intf = xencons_interface();
cons = intf->out_cons;
@@ -76,7 +78,10 @@ xencons_ring_send(const char *data, unsigned len)
wmb();
intf->out_prod = prod;
- xen_intr_signal(console_handle);
+ if (cnsl_evt_reg)
+ xen_intr_signal(console_handle);
+ else
+ HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
return sent;
@@ -125,11 +130,11 @@ xencons_ring_init(void)
{
int err;
- if (!xen_start_info->console_evtchn)
+ if (!HYPERVISOR_start_info->console_evtchn)
return 0;
err = xen_intr_bind_local_port(xencons_dev,
- xen_start_info->console_evtchn, NULL, xencons_handle_input, NULL,
+ HYPERVISOR_start_info->console_evtchn, NULL, xencons_handle_input, NULL,
INTR_TYPE_MISC | INTR_MPSAFE, &console_handle);
if (err) {
return err;
@@ -145,7 +150,7 @@ void
xencons_suspend(void)
{
- if (!xen_start_info->console_evtchn)
+ if (!HYPERVISOR_start_info->console_evtchn)
return;
xen_intr_unbind(&console_handle);
diff --git a/sys/i386/include/xen/xen-os.h b/sys/i386/include/xen/xen-os.h
index a8fba61..3d1ef04 100644
--- a/sys/i386/include/xen/xen-os.h
+++ b/sys/i386/include/xen/xen-os.h
@@ -45,7 +45,6 @@ static inline void rep_nop(void)
#define cpu_relax() rep_nop()
#ifndef XENHVM
-void xc_printf(const char *fmt, ...);
#ifdef SMP
extern int gdtset;
diff --git a/sys/i386/xen/xen_machdep.c b/sys/i386/xen/xen_machdep.c
index fd575ee..09c01f1 100644
--- a/sys/i386/xen/xen_machdep.c
+++ b/sys/i386/xen/xen_machdep.c
@@ -186,21 +186,6 @@ xen_boothowto(char *envp)
return howto;
}
-#define XC_PRINTF_BUFSIZE 1024
-void
-xc_printf(const char *fmt, ...)
-{
- __va_list ap;
- int retval;
- static char buf[XC_PRINTF_BUFSIZE];
-
- va_start(ap, fmt);
- retval = vsnprintf(buf, XC_PRINTF_BUFSIZE - 1, fmt, ap);
- va_end(ap);
- buf[retval] = 0;
- (void)HYPERVISOR_console_write(buf, retval);
-}
-
#define XPQUEUE_SIZE 128
@@ -745,8 +730,6 @@ void initvalues(start_info_t *startinfo);
struct xenstore_domain_interface;
extern struct xenstore_domain_interface *xen_store;
-char *console_page;
-
void *
bootmem_alloc(unsigned int size)
{
diff --git a/sys/x86/xen/pv.c b/sys/x86/xen/pv.c
index 5571ecf..db3b7a3 100644
--- a/sys/x86/xen/pv.c
+++ b/sys/x86/xen/pv.c
@@ -70,9 +70,12 @@ hammer_time_xen(start_info_t *si, u_int64_t xenstack)
int i;
if ((si == NULL) || (xenstack == 0)) {
+ xc_printf("ERROR: invalid start_info or xen stack, halting\n");
HYPERVISOR_shutdown(SHUTDOWN_crash);
}
+ xc_printf("FreeBSD PVH running on %s\n", si->magic);
+
/* We use 3 pages of xen stack for the boot pagetables */
physfree = xenstack + 3 * PAGE_SIZE - KERNBASE;
@@ -90,6 +93,7 @@ hammer_time_xen(start_info_t *si, u_int64_t xenstack)
*/
xen_store = (struct xenstore_domain_interface *)
(ptoa(si->store_mfn) + KERNBASE);
+ console_page = (char *)(ptoa(si->console.domU.mfn) + KERNBASE);
xen_domain_type = XEN_PV_DOMAIN;
vm_guest = VM_GUEST_XEN;
diff --git a/sys/xen/xen-os.h b/sys/xen/xen-os.h
index e8a5a99..e005ccd 100644
--- a/sys/xen/xen-os.h
+++ b/sys/xen/xen-os.h
@@ -55,6 +55,7 @@ extern start_info_t *HYPERVISOR_start_info;
/* XXX: we need to get rid of this and use HYPERVISOR_start_info directly */
extern struct xenstore_domain_interface *xen_store;
+extern char *console_page;
enum xen_domain_type {
XEN_NATIVE, /* running on bare hardware */
@@ -89,6 +90,9 @@ xen_initial_domain(void)
HYPERVISOR_start_info->flags & SIF_INITDOMAIN);
}
+/* Debug function, prints directly to hypervisor console */
+void xc_printf(const char *, ...);
+
#ifndef xen_mb
#define xen_mb() mb()
#endif
--
1.7.7.5 (Apple Git-26)
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