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Fixed time processing.

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- arm64: Get TSC corresponding to boot time from IHK.

- x86_64: Calculate the current time using vdso.

Refs: #1186
Fujitsu: POSTK_DEBUG_ARCH_DEP_52
Change-Id: I293ba4bbe5390d50dea44b8a5b7471f59237daff
This commit is contained in:
Tomoki Shirasawa
2019-02-17 16:37:29 +09:00
committed by Masamichi Takagi
parent 07aa96ef95
commit 5bc54a3bbe
15 changed files with 471 additions and 88 deletions
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6
kernel/init.c
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@@ -170,7 +170,8 @@ static void parse_kargs(void)
}
}
extern void ihk_mc_get_boot_time(unsigned long *tv_sec, unsigned long *tv_nsec);
extern void ihk_mc_get_boot_time(unsigned long *tv_sec, unsigned long *tv_nsec,
unsigned long *tsc);
extern unsigned long ihk_mc_get_ns_per_tsc(void);
static void time_init(void)
@@ -179,7 +180,7 @@ static void time_init(void)
unsigned long ns_per_kclock;
unsigned long tsc;
ihk_mc_get_boot_time(&tv_sec, &tv_nsec);
ihk_mc_get_boot_time(&tv_sec, &tv_nsec, &tsc);
ns_per_kclock = ihk_mc_get_ns_per_tsc();
tod_data.origin.tv_sec = tv_sec;
@@ -188,7 +189,6 @@ static void time_init(void)
if (ns_per_kclock) {
tod_data.clocks_per_sec = (1000L * NS_PER_SEC) / ns_per_kclock;
tsc = rdtsc();
tod_data.origin.tv_sec -= tsc / tod_data.clocks_per_sec;
tod_data.origin.tv_nsec -= NS_PER_SEC * (tsc % tod_data.clocks_per_sec)
/ tod_data.clocks_per_sec;