[Xen-devel] [PATCH 1/3] xenstore: setup xenstore stubdom console interface properly

[Juergen Gross <jgross@xxxxxxxx>]

In order to be able to get access to the console of Xenstore stubdom
we need an appropriate granttab entry. So call xc_dom_gnttab_init()
when constructing the domain and preset some information needed
for that function in the dom structure.

We need to create the event channel for the console, too. Do that and
store all necessary data locally.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
 tools/helpers/init-xenstore-domain.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tools/helpers/init-xenstore-domain.c 
b/tools/helpers/init-xenstore-domain.c
index adb8408b63..a312bc38b8 100644
--- a/tools/helpers/init-xenstore-domain.c
+++ b/tools/helpers/init-xenstore-domain.c
@@ -24,6 +24,8 @@ static char *param;
 static char *name = "Xenstore";
 static int memory;
 static int maxmem;
+static xen_pfn_t console_mfn;
+static unsigned int console_evtchn;
 
 static struct option options[] = {
     { "kernel", 1, NULL, 'k' },
@@ -113,6 +115,7 @@ static int build(xc_interface *xch)
         fprintf(stderr, "xc_domain_setmaxmem failed\n");
         goto err;
     }
+    console_evtchn = xc_evtchn_alloc_unbound(xch, domid, 0);
     rv = xc_domain_set_memmap_limit(xch, domid, limit_kb);
     if ( rv )
     {
@@ -133,6 +136,9 @@ static int build(xc_interface *xch)
         snprintf(cmdline, 512, "--event %d --internal-db", rv);
 
     dom = xc_dom_allocate(xch, cmdline, NULL);
+    dom->container_type = XC_DOM_PV_CONTAINER;
+    dom->xenstore_domid = domid;
+    dom->console_evtchn = console_evtchn;
     rv = xc_dom_kernel_file(dom, kernel);
     if ( rv )
     {
@@ -186,6 +192,12 @@ static int build(xc_interface *xch)
         fprintf(stderr, "xc_dom_boot_image failed\n");
         goto err;
     }
+    rv = xc_dom_gnttab_init(dom);
+    if ( rv )
+    {
+        fprintf(stderr, "xc_dom_gnttab_init failed\n");
+        goto err;
+    }
 
     rv = xc_domain_set_virq_handler(xch, domid, VIRQ_DOM_EXC);
     if ( rv )
@@ -201,6 +213,7 @@ static int build(xc_interface *xch)
     }
 
     rv = 0;
+    console_mfn = xc_dom_p2m(dom, dom->console_pfn);
 
 err:
     if ( dom )
-- 
2.16.4


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