From: Keir Fraser <keir.fraser@citrix.com>
Date: Tue, 6 May 2008 15:20:54 +0000 (+0100)
Subject: x86 hvm: Warn only once per time source when the periodic tiemout is
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14215^2~63
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/success/%22http:/www.example.com/cgi/success?a=commitdiff_plain;h=08fe56f0cd8c00e4b3e12874cfc5c98fa7466e3b;p=xen.git

x86 hvm: Warn only once per time source when the periodic tiemout is
set 'too small'.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
---

diff --git a/xen/arch/x86/hvm/vpt.c b/xen/arch/x86/hvm/vpt.c
index 16f886647d..832c9042d7 100644
--- a/xen/arch/x86/hvm/vpt.c
+++ b/xen/arch/x86/hvm/vpt.c
@@ -338,9 +338,9 @@ void create_periodic_time(
     /* Periodic timer must be at least 0.9ms. */
     if ( (period < 900000) && !one_shot )
     {
-        gdprintk(XENLOG_WARNING,
-                 "HVM_PlatformTime: program too small period %"PRIu64"\n",
-                 period);
+        if ( !test_and_set_bool(pt->warned_timeout_too_short) )
+            gdprintk(XENLOG_WARNING, "HVM_PlatformTime: program too "
+                     "small period %"PRIu64"\n", period);
         period = 900000;
     }
 
diff --git a/xen/include/asm-x86/hvm/vpt.h b/xen/include/asm-x86/hvm/vpt.h
index b7176e89b1..d05d0dfa27 100644
--- a/xen/include/asm-x86/hvm/vpt.h
+++ b/xen/include/asm-x86/hvm/vpt.h
@@ -78,6 +78,7 @@ struct periodic_time {
     bool_t one_shot;
     bool_t do_not_freeze;
     bool_t irq_issued;
+    bool_t warned_timeout_too_short;
 #define PTSRC_isa    1 /* ISA time source */
 #define PTSRC_lapic  2 /* LAPIC time source */
     u8 source;                  /* PTSRC_ */