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pseries: Implement set-time-of-day RTAS function 

Currently there is no implementation for set-time-of-day rtas function,
which causes the following warning "setting the clock failed (-1)" on
the guest.

This patch just creates this function, get the timedate diff and store in
the papr environment, so that the correct value will be returned by
get-time-of-day.

In order to try it, just adjust the hardware time, run hwclock --systohc,
so that, on when the system runs hwclock --hctosys, the value is correctly
adjusted, i.e. the host time plus the timediff.

Signed-off-by: Breno Leitao <brenohl@br.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Breno Leitao 2011-09-28 16:53:16 +00:00 committed by Alexander Graf
parent e6c866d417
commit ac26f8c389
2 changed files with 24 additions and 1 deletions
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1
hw/spapr.h
View File

@ -18,6 +18,7 @@ typedef struct sPAPREnvironment {
void *fdt_skel;
target_ulong entry_point;
int next_irq;
int rtc_offset;
} sPAPREnvironment;
#define H_SUCCESS 0

24
hw/spapr_rtas.c
View File

@ -67,7 +67,7 @@ static void rtas_get_time_of_day(sPAPREnvironment *spapr,
return;
}
qemu_get_timedate(&tm, 0);
qemu_get_timedate(&tm, spapr->rtc_offset);
rtas_st(rets, 0, 0); /* Success */
rtas_st(rets, 1, tm.tm_year + 1900);
@ -79,6 +79,27 @@ static void rtas_get_time_of_day(sPAPREnvironment *spapr,
rtas_st(rets, 7, 0); /* we don't do nanoseconds */
}
static void rtas_set_time_of_day(sPAPREnvironment *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)
{
struct tm tm;
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);
/* Just generate a monitor event for the change */
rtc_change_mon_event(&tm);
spapr->rtc_offset = qemu_timedate_diff(&tm);
rtas_st(rets, 0, 0); /* Success */
}
static void rtas_power_off(sPAPREnvironment *spapr,
uint32_t token, uint32_t nargs, target_ulong args,
uint32_t nret, target_ulong rets)
@ -271,6 +292,7 @@ static void register_core_rtas(void)
{
spapr_rtas_register("display-character", rtas_display_character);
spapr_rtas_register("get-time-of-day", rtas_get_time_of_day);
spapr_rtas_register("set-time-of-day", rtas_set_time_of_day);
spapr_rtas_register("power-off", rtas_power_off);
spapr_rtas_register("query-cpu-stopped-state",
rtas_query_cpu_stopped_state);