When entering the grub2 shell during a pvgrub2 boot, there is no info about the
current
domU in the grubenv (set). Starting with a patch submitted by Olaf Herring I
exported
the xenstore cmdline only.
The env var, xen_cmdline, can then be used in the top level script used to make
the pvgrub2 kernel blob.
Signed-off-by: Mark Pryor <pryor...@gmail.com>
---
grub-core/kern/xen/init.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/grub-core/kern/xen/init.c b/grub-core/kern/xen/init.c
index 0559c03..2a3112d 100644
--- a/grub-core/kern/xen/init.c
+++ b/grub-core/kern/xen/init.c
@@ -524,6 +524,29 @@ map_all_pages (void)
grub_mm_init_region ((void *) heap_start, heap_end - heap_start);
}
+/*
+ * Find all name=val pairs in the provided cmd_line and export them
+ * so that scripts can evaluate the variables for their own purpose.
+ */
+static void
+export_cmdline (void)
+{
+ char *p;
+ const char *name="xen_cmdline";
+
+ p = grub_malloc (MAX_GUEST_CMDLINE + 1);
+ if (!p)
+ return;
+
+ grub_memcpy (p, grub_xen_start_page_addr->cmd_line, MAX_GUEST_CMDLINE);
+ p[MAX_GUEST_CMDLINE] = '\0';
+
+ grub_env_set (name, p);
+ grub_env_export (name);
+
+ grub_free (p);
+}
+
extern char _end[];
void
@@ -539,6 +562,8 @@ grub_machine_init (void)
map_all_pages ();
+ export_cmdline ();
+
grub_console_init ();
grub_tsc_init ();
--
2.1.4
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