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Following arm64-support to development branch

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This includes the following fixes:
* fix build of arch/arm64/kernel/vdso

Change-Id: I73b05034d29f7f8731ac17f9736edbba4fb2c639
This commit is contained in:
Takehiro Shiratori
2019-01-30 16:27:03 +09:00
committed by Dominique Martinet
parent e52d748744
commit d4d78e9c61
66 changed files with 3110 additions and 1209 deletions
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70
arch/arm64/kernel/vdso/gettimeofday.c
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@@ -1,58 +1,25 @@
/* gettimeofday.c COPYRIGHT FUJITSU LIMITED 2016 */
#include <affinity.h>
#include <arch-memory.h>
/* gettimeofday.c COPYRIGHT FUJITSU LIMITED 2016-2018 */
#include <time.h>
#include <memory.h>
#include <affinity.h>
#include <syscall.h>
#include <registers.h>
#include <ihk/atomic.h>
extern int __kernel_gettimeofday(struct timeval *tv, void *tz);
static inline void cpu_pause_for_vsyscall(void)
#define UNUSED(x) ((void)(x))
void vdso_gettimeofday_unused_funcs(void)
{
asm volatile ("yield" ::: "memory");
return;
}
static inline void calculate_time_from_tsc(struct timespec *ts,
struct tod_data_s *tod_data)
{
long ver;
unsigned long current_tsc;
__time_t sec_delta;
long ns_delta;
for (;;) {
while ((ver = ihk_atomic64_read(&tod_data->version)) & 1) {
/* settimeofday() is in progress */
cpu_pause_for_vsyscall();
}
rmb();
*ts = tod_data->origin;
rmb();
if (ver == ihk_atomic64_read(&tod_data->version)) {
break;
}
/* settimeofday() has intervened */
cpu_pause_for_vsyscall();
}
current_tsc = rdtsc();
sec_delta = current_tsc / tod_data->clocks_per_sec;
ns_delta = NS_PER_SEC * (current_tsc % tod_data->clocks_per_sec)
/ tod_data->clocks_per_sec;
/* calc. of ns_delta overflows if clocks_per_sec exceeds 18.44 GHz */
ts->tv_sec += sec_delta;
ts->tv_nsec += ns_delta;
if (ts->tv_nsec >= NS_PER_SEC) {
ts->tv_nsec -= NS_PER_SEC;
++ts->tv_sec;
}
return;
UNUSED(xgetbv);
UNUSED(xsetbv);
UNUSED(rdpmc);
UNUSED(rdmsr);
UNUSED(set_perfctl);
UNUSED(start_perfctr);
UNUSED(stop_perfctr);
UNUSED(clear_perfctl);
UNUSED(set_perfctr);
UNUSED(read_perfctr);
UNUSED(xos_is_tchip);
}
static inline struct tod_data_s *get_tod_data_addr(void)
@@ -82,7 +49,7 @@ int __kernel_gettimeofday(struct timeval *tv, void *tz)
/* DO it locally if supported */
if (!tz && tod_data->do_local) {
calculate_time_from_tsc(&ats, tod_data);
calculate_time_from_tsc(&ats);
tv->tv_sec = ats.tv_sec;
tv->tv_usec = ats.tv_nsec / 1000;
@@ -106,7 +73,6 @@ int __kernel_gettimeofday(struct timeval *tv, void *tz)
return (int)ret;
}
/*
* The IDs of the various system clocks (for POSIX.1b interval timers):
* @ref.impl include/uapi/linux/time.h
@@ -146,7 +112,7 @@ int __kernel_clock_gettime(clockid_t clk_id, struct timespec *tp)
/* DO it locally if supported */
if (tod_data->do_local && clk_id == CLOCK_REALTIME) {
calculate_time_from_tsc(&ats, tod_data);
calculate_time_from_tsc(&ats);
tp->tv_sec = ats.tv_sec;
tp->tv_nsec = ats.tv_nsec;