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Do not set RTC frequency if already set (Aurelien Jarno). 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3954 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
balrog 2008-02-03 03:45:47 +00:00
parent c717d8bf13
commit b5a23ad40c
1 changed files with 4 additions and 1 deletions
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5
vl.c
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@ -1305,11 +1305,14 @@ static void hpet_stop_timer(struct qemu_alarm_timer *t)
static int rtc_start_timer(struct qemu_alarm_timer *t)
{
int rtc_fd;
unsigned long current_rtc_freq = 0;
TFR(rtc_fd = open("/dev/rtc", O_RDONLY));
if (rtc_fd < 0)
return -1;
if (ioctl(rtc_fd, RTC_IRQP_SET, RTC_FREQ) < 0) {
ioctl(rtc_fd, RTC_IRQP_READ, &current_rtc_freq);
if (current_rtc_freq != RTC_FREQ &&
ioctl(rtc_fd, RTC_IRQP_SET, RTC_FREQ) < 0) {
fprintf(stderr, "Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a fatal\n"
"error, but for better emulation accuracy either use a 2.6 host Linux kernel or\n"
"type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root.\n");