Re: [PATCH 31/36] vl: extract softmmu/rtc.c

[Igor Mammedov]

On Mon, 23 Nov 2020 09:14:30 -0500
Paolo Bonzini <pbonzini@redhat.com> wrote:

> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> ---
>  include/sysemu/sysemu.h |   2 +
>  softmmu/meson.build     |   1 +
>  softmmu/rtc.c           | 190 ++++++++++++++++++++++++++++++++++++++++
>  softmmu/vl.c            | 156 ---------------------------------
>  4 files changed, 193 insertions(+), 156 deletions(-)
>  create mode 100644 softmmu/rtc.c
> 
> diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
> index 1b62deaf2b..18cf586cd0 100644
> --- a/include/sysemu/sysemu.h
> +++ b/include/sysemu/sysemu.h
> @@ -22,6 +22,8 @@ void qemu_run_machine_init_done_notifiers(void);
>  void qemu_add_machine_init_done_notifier(Notifier *notify);
>  void qemu_remove_machine_init_done_notifier(Notifier *notify);
>  
> +void configure_rtc(QemuOpts *opts);
> +
>  extern int autostart;
>  
>  typedef enum {
> diff --git a/softmmu/meson.build b/softmmu/meson.build
> index 7b52339e7a..d098d89653 100644
> --- a/softmmu/meson.build
> +++ b/softmmu/meson.build
> @@ -6,6 +6,7 @@ specific_ss.add(when: 'CONFIG_SOFTMMU', if_true: [files(
>    'datadir.c',
>    'physmem.c',
>    'ioport.c',
> +  'rtc.c',
>    'memory.c',
>    'memory_mapping.c',
>    'qtest.c',
> diff --git a/softmmu/rtc.c b/softmmu/rtc.c
> new file mode 100644
> index 0000000000..e1e15ef613
> --- /dev/null
> +++ b/softmmu/rtc.c
> @@ -0,0 +1,190 @@
> +/*
> + * RTC configuration and clock read
> + *
> + * Copyright (c) 2003-2020 QEMU contributors
> + *
> + * 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 "qemu/osdep.h"
> +#include "qemu-common.h"
> +#include "qemu/cutils.h"
> +#include "qapi/error.h"
> +#include "qapi/qmp/qerror.h"
> +#include "qemu/error-report.h"
> +#include "qemu/option.h"
> +#include "qemu/timer.h"
> +#include "qom/object.h"
> +#include "sysemu/replay.h"
> +#include "sysemu/sysemu.h"
> +
> +static enum {
> +    RTC_BASE_UTC,
> +    RTC_BASE_LOCALTIME,
> +    RTC_BASE_DATETIME,
> +} rtc_base_type = RTC_BASE_UTC;
> +static time_t rtc_ref_start_datetime;
> +static int rtc_realtime_clock_offset; /* used only with QEMU_CLOCK_REALTIME 
> */
> +static int rtc_host_datetime_offset = -1; /* valid & used only with
> +                                             RTC_BASE_DATETIME */
> +QEMUClockType rtc_clock;
> +/***********************************************************/
> +/* RTC reference time/date access */
> +static time_t qemu_ref_timedate(QEMUClockType clock)
> +{
> +    time_t value = qemu_clock_get_ms(clock) / 1000;
> +    switch (clock) {
> +    case QEMU_CLOCK_REALTIME:
> +        value -= rtc_realtime_clock_offset;
> +        /* fall through */
> +    case QEMU_CLOCK_VIRTUAL:
> +        value += rtc_ref_start_datetime;
> +        break;
> +    case QEMU_CLOCK_HOST:
> +        if (rtc_base_type == RTC_BASE_DATETIME) {
> +            value -= rtc_host_datetime_offset;
> +        }
> +        break;
> +    default:
> +        assert(0);
> +    }
> +    return value;
> +}
> +
> +void qemu_get_timedate(struct tm *tm, int offset)
> +{
> +    time_t ti = qemu_ref_timedate(rtc_clock);
> +
> +    ti += offset;
> +
> +    switch (rtc_base_type) {
> +    case RTC_BASE_DATETIME:
> +    case RTC_BASE_UTC:
> +        gmtime_r(&ti, tm);
> +        break;
> +    case RTC_BASE_LOCALTIME:
> +        localtime_r(&ti, tm);
> +        break;
> +    }
> +}
> +
> +int qemu_timedate_diff(struct tm *tm)
> +{
> +    time_t seconds;
> +
> +    switch (rtc_base_type) {
> +    case RTC_BASE_DATETIME:
> +    case RTC_BASE_UTC:
> +        seconds = mktimegm(tm);
> +        break;
> +    case RTC_BASE_LOCALTIME:
> +    {
> +        struct tm tmp = *tm;
> +        tmp.tm_isdst = -1; /* use timezone to figure it out */
> +        seconds = mktime(&tmp);
> +        break;
> +    }
> +    default:
> +        abort();
> +    }
> +
> +    return seconds - qemu_ref_timedate(QEMU_CLOCK_HOST);
> +}
> +
> +static void configure_rtc_base_datetime(const char *startdate)
> +{
> +    time_t rtc_start_datetime;
> +    struct tm tm;
> +
> +    if (sscanf(startdate, "%d-%d-%dT%d:%d:%d", &tm.tm_year, &tm.tm_mon,
> +               &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) == 6) {
> +        /* OK */
> +    } else if (sscanf(startdate, "%d-%d-%d",
> +                      &tm.tm_year, &tm.tm_mon, &tm.tm_mday) == 3) {
> +        tm.tm_hour = 0;
> +        tm.tm_min = 0;
> +        tm.tm_sec = 0;
> +    } else {
> +        goto date_fail;
> +    }
> +    tm.tm_year -= 1900;
> +    tm.tm_mon--;
> +    rtc_start_datetime = mktimegm(&tm);
> +    if (rtc_start_datetime == -1) {
> +    date_fail:
> +        error_report("invalid datetime format");
> +        error_printf("valid formats: "
> +                     "'2006-06-17T16:01:21' or '2006-06-17'\n");
> +        exit(1);
> +    }
> +    rtc_host_datetime_offset = rtc_ref_start_datetime - rtc_start_datetime;
> +    rtc_ref_start_datetime = rtc_start_datetime;
> +}
> +
> +void configure_rtc(QemuOpts *opts)
> +{
> +    const char *value;
> +
> +    /* Set defaults */
> +    rtc_clock = QEMU_CLOCK_HOST;
> +    rtc_ref_start_datetime = qemu_clock_get_ms(QEMU_CLOCK_HOST) / 1000;
> +    rtc_realtime_clock_offset = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) / 
> 1000;
> +
> +    value = qemu_opt_get(opts, "base");
> +    if (value) {
> +        if (!strcmp(value, "utc")) {
> +            rtc_base_type = RTC_BASE_UTC;
> +        } else if (!strcmp(value, "localtime")) {
> +            Error *blocker = NULL;
> +            rtc_base_type = RTC_BASE_LOCALTIME;
> +            error_setg(&blocker, QERR_REPLAY_NOT_SUPPORTED,
> +                      "-rtc base=localtime");
> +            replay_add_blocker(blocker);
> +        } else {
> +            rtc_base_type = RTC_BASE_DATETIME;
> +            configure_rtc_base_datetime(value);
> +        }
> +    }
> +    value = qemu_opt_get(opts, "clock");
> +    if (value) {
> +        if (!strcmp(value, "host")) {
> +            rtc_clock = QEMU_CLOCK_HOST;
> +        } else if (!strcmp(value, "rt")) {
> +            rtc_clock = QEMU_CLOCK_REALTIME;
> +        } else if (!strcmp(value, "vm")) {
> +            rtc_clock = QEMU_CLOCK_VIRTUAL;
> +        } else {
> +            error_report("invalid option value '%s'", value);
> +            exit(1);
> +        }
> +    }
> +    value = qemu_opt_get(opts, "driftfix");
> +    if (value) {
> +        if (!strcmp(value, "slew")) {
> +            object_register_sugar_prop("mc146818rtc",
> +                                       "lost_tick_policy",
> +                                       "slew");
> +        } else if (!strcmp(value, "none")) {
> +            /* discard is default */
> +        } else {
> +            error_report("invalid option value '%s'", value);
> +            exit(1);
> +        }
> +    }
> +}
> diff --git a/softmmu/vl.c b/softmmu/vl.c
> index 7e13bb4a59..c9bb205c42 100644
> --- a/softmmu/vl.c
> +++ b/softmmu/vl.c
> @@ -152,16 +152,6 @@ bool enable_cpu_pm = false;
>  int nb_nics;
>  NICInfo nd_table[MAX_NICS];
>  int autostart = 1;
> -static enum {
> -    RTC_BASE_UTC,
> -    RTC_BASE_LOCALTIME,
> -    RTC_BASE_DATETIME,
> -} rtc_base_type = RTC_BASE_UTC;
> -static time_t rtc_ref_start_datetime;
> -static int rtc_realtime_clock_offset; /* used only with QEMU_CLOCK_REALTIME 
> */
> -static int rtc_host_datetime_offset = -1; /* valid & used only with
> -                                             RTC_BASE_DATETIME */
> -QEMUClockType rtc_clock;
>  int vga_interface_type = VGA_NONE;
>  static const char *vga_model = NULL;
>  static DisplayOptions dpy;
> @@ -766,152 +756,6 @@ void qemu_system_vmstop_request(RunState state)
>      qemu_mutex_unlock(&vmstop_lock);
>      qemu_notify_event();
>  }
> -
> -/***********************************************************/
> -/* RTC reference time/date access */
> -static time_t qemu_ref_timedate(QEMUClockType clock)
> -{
> -    time_t value = qemu_clock_get_ms(clock) / 1000;
> -    switch (clock) {
> -    case QEMU_CLOCK_REALTIME:
> -        value -= rtc_realtime_clock_offset;
> -        /* fall through */
> -    case QEMU_CLOCK_VIRTUAL:
> -        value += rtc_ref_start_datetime;
> -        break;
> -    case QEMU_CLOCK_HOST:
> -        if (rtc_base_type == RTC_BASE_DATETIME) {
> -            value -= rtc_host_datetime_offset;
> -        }
> -        break;
> -    default:
> -        assert(0);
> -    }
> -    return value;
> -}
> -
> -void qemu_get_timedate(struct tm *tm, int offset)
> -{
> -    time_t ti = qemu_ref_timedate(rtc_clock);
> -
> -    ti += offset;
> -
> -    switch (rtc_base_type) {
> -    case RTC_BASE_DATETIME:
> -    case RTC_BASE_UTC:
> -        gmtime_r(&ti, tm);
> -        break;
> -    case RTC_BASE_LOCALTIME:
> -        localtime_r(&ti, tm);
> -        break;
> -    }
> -}
> -
> -int qemu_timedate_diff(struct tm *tm)
> -{
> -    time_t seconds;
> -
> -    switch (rtc_base_type) {
> -    case RTC_BASE_DATETIME:
> -    case RTC_BASE_UTC:
> -        seconds = mktimegm(tm);
> -        break;
> -    case RTC_BASE_LOCALTIME:
> -    {
> -        struct tm tmp = *tm;
> -        tmp.tm_isdst = -1; /* use timezone to figure it out */
> -        seconds = mktime(&tmp);
> -        break;
> -    }
> -    default:
> -        abort();
> -    }
> -
> -    return seconds - qemu_ref_timedate(QEMU_CLOCK_HOST);
> -}
> -
> -static void configure_rtc_base_datetime(const char *startdate)
> -{
> -    time_t rtc_start_datetime;
> -    struct tm tm;
> -
> -    if (sscanf(startdate, "%d-%d-%dT%d:%d:%d", &tm.tm_year, &tm.tm_mon,
> -               &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) == 6) {
> -        /* OK */
> -    } else if (sscanf(startdate, "%d-%d-%d",
> -                      &tm.tm_year, &tm.tm_mon, &tm.tm_mday) == 3) {
> -        tm.tm_hour = 0;
> -        tm.tm_min = 0;
> -        tm.tm_sec = 0;
> -    } else {
> -        goto date_fail;
> -    }
> -    tm.tm_year -= 1900;
> -    tm.tm_mon--;
> -    rtc_start_datetime = mktimegm(&tm);
> -    if (rtc_start_datetime == -1) {
> -    date_fail:
> -        error_report("invalid datetime format");
> -        error_printf("valid formats: "
> -                     "'2006-06-17T16:01:21' or '2006-06-17'\n");
> -        exit(1);
> -    }
> -    rtc_host_datetime_offset = rtc_ref_start_datetime - rtc_start_datetime;
> -    rtc_ref_start_datetime = rtc_start_datetime;
> -}
> -
> -static void configure_rtc(QemuOpts *opts)
> -{
> -    const char *value;
> -
> -    /* Set defaults */
> -    rtc_clock = QEMU_CLOCK_HOST;
> -    rtc_ref_start_datetime = qemu_clock_get_ms(QEMU_CLOCK_HOST) / 1000;
> -    rtc_realtime_clock_offset = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) / 
> 1000;
> -
> -    value = qemu_opt_get(opts, "base");
> -    if (value) {
> -        if (!strcmp(value, "utc")) {
> -            rtc_base_type = RTC_BASE_UTC;
> -        } else if (!strcmp(value, "localtime")) {
> -            Error *blocker = NULL;
> -            rtc_base_type = RTC_BASE_LOCALTIME;
> -            error_setg(&blocker, QERR_REPLAY_NOT_SUPPORTED,
> -                      "-rtc base=localtime");
> -            replay_add_blocker(blocker);
> -        } else {
> -            rtc_base_type = RTC_BASE_DATETIME;
> -            configure_rtc_base_datetime(value);
> -        }
> -    }
> -    value = qemu_opt_get(opts, "clock");
> -    if (value) {
> -        if (!strcmp(value, "host")) {
> -            rtc_clock = QEMU_CLOCK_HOST;
> -        } else if (!strcmp(value, "rt")) {
> -            rtc_clock = QEMU_CLOCK_REALTIME;
> -        } else if (!strcmp(value, "vm")) {
> -            rtc_clock = QEMU_CLOCK_VIRTUAL;
> -        } else {
> -            error_report("invalid option value '%s'", value);
> -            exit(1);
> -        }
> -    }
> -    value = qemu_opt_get(opts, "driftfix");
> -    if (value) {
> -        if (!strcmp(value, "slew")) {
> -            object_register_sugar_prop("mc146818rtc",
> -                                       "lost_tick_policy",
> -                                       "slew");
> -        } else if (!strcmp(value, "none")) {
> -            /* discard is default */
> -        } else {
> -            error_report("invalid option value '%s'", value);
> -            exit(1);
> -        }
> -    }
> -}
> -
>  static int parse_name(void *opaque, QemuOpts *opts, Error **errp)
>  {
>      const char *proc_name;