From 9e4f8153248f3db4e240e803759c764d83a0e54c Mon Sep 17 00:00:00 2001 From: Keir Fraser Date: Tue, 9 Mar 2010 09:57:25 +0000 Subject: [PATCH] hvm: correct time offset update in RTC write emulation mktime takes a month in 1..12 form while tm->tm_mon contains 0..11 so we need to add 1. Without this fix setting the month back or forward a month inside the guest would lead to the wrong number of days being added/subtracted. Signed-off-by: Ian Campbell --- xen/arch/x86/hvm/rtc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/xen/arch/x86/hvm/rtc.c b/xen/arch/x86/hvm/rtc.c index 174a111535..1eb4854276 100644 --- a/xen/arch/x86/hvm/rtc.c +++ b/xen/arch/x86/hvm/rtc.c @@ -165,7 +165,7 @@ static void rtc_set_time(RTCState *s) ASSERT(spin_is_locked(&s->lock)); - before = mktime(tm->tm_year, tm->tm_mon, tm->tm_mday, + before = mktime(tm->tm_year, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); tm->tm_sec = from_bcd(s, s->hw.cmos_data[RTC_SECONDS]); @@ -179,7 +179,7 @@ static void rtc_set_time(RTCState *s) tm->tm_mon = from_bcd(s, s->hw.cmos_data[RTC_MONTH]) - 1; tm->tm_year = from_bcd(s, s->hw.cmos_data[RTC_YEAR]) + 100; - after = mktime(tm->tm_year, tm->tm_mon, tm->tm_mday, + after = mktime(tm->tm_year, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); /* We use the guest's setting of the RTC to define the local-time -- 2.30.2