From fdb9eb9f155bfc0f8dc2fc88f90448b30c78ad97 Mon Sep 17 00:00:00 2001
From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Date: Fri, 26 Mar 2010 11:21:22 -0700
Subject: [PATCH] xen/dom0: set wallclock time in Xen
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
arch/x86/xen/time.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 5158c505bef977..8c9cdfa246573b 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -200,8 +200,22 @@ static unsigned long xen_get_wallclock(void)
static int xen_set_wallclock(unsigned long now)
{
+ struct xen_platform_op op;
+ int rc;
+
/* do nothing for domU */
- return -1;
+ if (!xen_initial_domain())
+ return -1;
+
+ op.cmd = XENPF_settime;
+ op.u.settime.secs = now;
+ op.u.settime.nsecs = 0;
+ op.u.settime.system_time = xen_clocksource_read();
+
+ rc = HYPERVISOR_dom0_op(&op);
+ WARN(rc != 0, "XENPF_settime failed: now=%ld\n", now);
+
+ return rc;
}
static struct clocksource xen_clocksource __read_mostly = {
--
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