Date: Mon, 2 May 2016 16:15:28 +0000 (UTC) From: =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= <royger@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r298929 - head/sys/dev/xen/timer Message-ID: <201605021615.u42GFSeR052375@repo.freebsd.org>
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Author: royger Date: Mon May 2 16:15:28 2016 New Revision: 298929 URL: https://svnweb.freebsd.org/changeset/base/298929 Log: xen/time: allow Dom0 to set the host time Dom0 should be able to set the host time. This is implemented by first writing to the RTC (as would be done on bare metal), and then using the XENPF_settime64 hypercall in order to force Xen to update the wallclock shared page of all domains. Sponsored by: Citrix Systems R&D Modified: head/sys/dev/xen/timer/timer.c Modified: head/sys/dev/xen/timer/timer.c ============================================================================== --- head/sys/dev/xen/timer/timer.c Mon May 2 16:14:55 2016 (r298928) +++ head/sys/dev/xen/timer/timer.c Mon May 2 16:15:28 2016 (r298929) @@ -53,6 +53,7 @@ __FBSDID("$FreeBSD$"); #include <xen/hypervisor.h> #include <xen/interface/io/xenbus.h> #include <xen/interface/vcpu.h> +#include <xen/error.h> #include <machine/cpu.h> #include <machine/cpufunc.h> @@ -63,6 +64,8 @@ __FBSDID("$FreeBSD$"); #include <dev/xen/timer/timer.h> +#include <isa/rtc.h> + #include "clock_if.h" static devclass_t xentimer_devclass; @@ -211,11 +214,32 @@ xen_fetch_uptime(struct timespec *ts) static int xentimer_settime(device_t dev __unused, struct timespec *ts) { + struct xen_platform_op settime; + int ret; + /* * Don't return EINVAL here; just silently fail if the domain isn't * privileged enough to set the TOD. */ - return (0); + if (!xen_initial_domain()) + return (0); + + /* Set the native RTC. */ + atrtc_set(ts); + + settime.cmd = XENPF_settime64; + settime.u.settime64.mbz = 0; + settime.u.settime64.secs = ts->tv_sec; + settime.u.settime64.nsecs = ts->tv_nsec; + settime.u.settime64.system_time = + xen_fetch_vcpu_time(DPCPU_GET(vcpu_info)); + + ret = HYPERVISOR_platform_op(&settime); + ret = ret != 0 ? xen_translate_error(ret) : 0; + if (ret != 0 && bootverbose) + device_printf(dev, "failed to set Xen PV clock: %d\n", ret); + + return (ret); } /**
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