[PATCH v2 7/7] xen/arm: set the system time in Xen via the XENPF_settime64 hypercall
arnd at arndb.de
Tue Nov 10 04:39:44 PST 2015
On Tuesday 10 November 2015 11:57:55 Stefano Stabellini wrote:
> + op.u.settime64.nsecs = now.tv_nsec;
> + op.u.settime64.system_time = arch_timer_read_counter() * (u64)NSEC_PER_SEC;
> + do_div(op.u.settime64.system_time, arch_timer_get_rate());
NSEC_PER_SEC is a large number, doesn't that multiplication overflow the
64-bit system_time variable?
> + printk("GTOD: Setting to %llu.%u at %llu\n",
so you get the leading zeroes.
> + op.u.settime64.secs,
> + op.u.settime64.nsecs,
> + op.u.settime64.system_time);
> + (void)HYPERVISOR_platform_op(&op);
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