The initial creation of the PAPR RTC qdev class left a wart - the rtc's offset was left in the sPAPREnvironment structure, accessed via a global. This patch moves it into the RTC device's own state structure, were it belongs. This requires a small change to the migration stream format. In order to handle incoming streams from older versions, we also need to retain the rtc_offset field in the sPAPREnvironment structure, so that it can be loaded into via the vmsd, then pushed into the RTC device. Since we're changing the migration format, this also takes the opportunity to: * Change the rtc offset from a value in seconds to a value in nanoseconds, allowing nanosecond offsets between host and guest rtc time, if desired. * Remove both the already unused "next_irq" field and now unused "rtc_offset" field from the new version of the spapr migration stream Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
206 lines
5.6 KiB
C
206 lines
5.6 KiB
C
/*
|
|
* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
|
|
*
|
|
* RTAS Real Time Clock
|
|
*
|
|
* Copyright (c) 2010-2011 David Gibson, IBM Corporation.
|
|
* Copyright 2014 David Gibson, Red Hat.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
*/
|
|
#include "cpu.h"
|
|
#include "sysemu/sysemu.h"
|
|
#include "hw/ppc/spapr.h"
|
|
#include "qapi-event.h"
|
|
|
|
#define SPAPR_RTC(obj) \
|
|
OBJECT_CHECK(sPAPRRTCState, (obj), TYPE_SPAPR_RTC)
|
|
|
|
typedef struct sPAPRRTCState sPAPRRTCState;
|
|
struct sPAPRRTCState {
|
|
/*< private >*/
|
|
SysBusDevice parent_obj;
|
|
int64_t ns_offset;
|
|
};
|
|
|
|
#define NSEC_PER_SEC 1000000000LL
|
|
|
|
void spapr_rtc_read(DeviceState *dev, struct tm *tm, uint32_t *ns)
|
|
{
|
|
sPAPRRTCState *rtc = SPAPR_RTC(dev);
|
|
int64_t host_ns = qemu_clock_get_ns(rtc_clock);
|
|
int64_t guest_ns;
|
|
time_t guest_s;
|
|
|
|
assert(rtc);
|
|
|
|
guest_ns = host_ns + rtc->ns_offset;
|
|
guest_s = guest_ns / NSEC_PER_SEC;
|
|
|
|
if (tm) {
|
|
gmtime_r(&guest_s, tm);
|
|
}
|
|
if (ns) {
|
|
*ns = guest_ns;
|
|
}
|
|
}
|
|
|
|
int spapr_rtc_import_offset(DeviceState *dev, int64_t legacy_offset)
|
|
{
|
|
sPAPRRTCState *rtc;
|
|
|
|
if (!dev) {
|
|
return -ENODEV;
|
|
}
|
|
|
|
rtc = SPAPR_RTC(dev);
|
|
|
|
rtc->ns_offset = legacy_offset * NSEC_PER_SEC;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rtas_get_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
struct tm tm;
|
|
uint32_t ns;
|
|
|
|
if ((nargs != 0) || (nret != 8)) {
|
|
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
|
|
return;
|
|
}
|
|
|
|
if (!spapr->rtc) {
|
|
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
|
|
return;
|
|
}
|
|
|
|
spapr_rtc_read(spapr->rtc, &tm, &ns);
|
|
|
|
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
|
|
rtas_st(rets, 1, tm.tm_year + 1900);
|
|
rtas_st(rets, 2, tm.tm_mon + 1);
|
|
rtas_st(rets, 3, tm.tm_mday);
|
|
rtas_st(rets, 4, tm.tm_hour);
|
|
rtas_st(rets, 5, tm.tm_min);
|
|
rtas_st(rets, 6, tm.tm_sec);
|
|
rtas_st(rets, 7, ns);
|
|
}
|
|
|
|
static void rtas_set_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
sPAPRRTCState *rtc;
|
|
struct tm tm;
|
|
time_t new_s;
|
|
int64_t host_ns;
|
|
|
|
if ((nargs != 7) || (nret != 1)) {
|
|
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
|
|
return;
|
|
}
|
|
|
|
if (!spapr->rtc) {
|
|
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
|
|
return;
|
|
}
|
|
|
|
tm.tm_year = rtas_ld(args, 0) - 1900;
|
|
tm.tm_mon = rtas_ld(args, 1) - 1;
|
|
tm.tm_mday = rtas_ld(args, 2);
|
|
tm.tm_hour = rtas_ld(args, 3);
|
|
tm.tm_min = rtas_ld(args, 4);
|
|
tm.tm_sec = rtas_ld(args, 5);
|
|
|
|
new_s = mktimegm(&tm);
|
|
if (new_s == -1) {
|
|
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
|
|
return;
|
|
}
|
|
|
|
/* Generate a monitor event for the change */
|
|
qapi_event_send_rtc_change(qemu_timedate_diff(&tm), &error_abort);
|
|
|
|
rtc = SPAPR_RTC(spapr->rtc);
|
|
|
|
host_ns = qemu_clock_get_ns(rtc_clock);
|
|
|
|
rtc->ns_offset = (new_s * NSEC_PER_SEC) - host_ns;
|
|
|
|
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
|
|
}
|
|
|
|
static void spapr_rtc_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
sPAPRRTCState *rtc = SPAPR_RTC(dev);
|
|
struct tm tm;
|
|
time_t host_s;
|
|
int64_t rtc_ns;
|
|
|
|
/* Initialize the RTAS RTC from host time */
|
|
|
|
qemu_get_timedate(&tm, 0);
|
|
host_s = mktimegm(&tm);
|
|
rtc_ns = qemu_clock_get_ns(rtc_clock);
|
|
rtc->ns_offset = host_s * NSEC_PER_SEC - rtc_ns;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_spapr_rtc = {
|
|
.name = "spapr/rtc",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_INT64(ns_offset, sPAPRRTCState),
|
|
VMSTATE_END_OF_LIST()
|
|
},
|
|
};
|
|
|
|
static void spapr_rtc_class_init(ObjectClass *oc, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(oc);
|
|
|
|
dc->realize = spapr_rtc_realize;
|
|
dc->vmsd = &vmstate_spapr_rtc;
|
|
|
|
spapr_rtas_register(RTAS_GET_TIME_OF_DAY, "get-time-of-day",
|
|
rtas_get_time_of_day);
|
|
spapr_rtas_register(RTAS_SET_TIME_OF_DAY, "set-time-of-day",
|
|
rtas_set_time_of_day);
|
|
}
|
|
|
|
static const TypeInfo spapr_rtc_info = {
|
|
.name = TYPE_SPAPR_RTC,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(sPAPRRTCState),
|
|
.class_size = sizeof(XICSStateClass),
|
|
.class_init = spapr_rtc_class_init,
|
|
};
|
|
|
|
static void spapr_rtc_register_types(void)
|
|
{
|
|
type_register_static(&spapr_rtc_info);
|
|
}
|
|
type_init(spapr_rtc_register_types)
|