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hv: timer: add calibrate tsc hz by cpuid 0x15

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Get tsc hz by cpuid 0x15 if we supported, otherwise
calibrate tsc by pit timer.

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Li, Fei1
2018-04-23 13:24:12 +08:00
committed by Jack Ren
parent cfc87903b2
commit dace32eca1
6 changed files with 50 additions and 21 deletions
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2
hypervisor/include/arch/x86/cpu.h
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@@ -258,8 +258,6 @@ extern struct cpuinfo_x86 boot_cpu_data;
/* Function prototypes */
void cpu_dead(uint32_t logical_id);
uint64_t cpu_cycles_per_second(void);
uint64_t tsc_cycles_in_period(uint16_t timer_period_in_us);
void cpu_secondary_reset(void);
int hv_main(int cpu_id);
bool is_vapic_supported(void);

1
hypervisor/include/arch/x86/timer.h
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@@ -42,5 +42,6 @@ int timer_softirq(int pcpu_id);
void timer_init(void);
void timer_cleanup(void);
void check_tsc(void);
void calibrate_tsc(void);
#endif /* TIMER_H */

8
hypervisor/include/lib/rtl.h
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@@ -65,12 +65,12 @@ void *memcpy_s(void *d, size_t dmax, const void *s, size_t slen);
int udiv64(uint64_t dividend, uint64_t divisor, struct udiv_result *res);
int udiv32(uint32_t dividend, uint32_t divisor, struct udiv_result *res);
extern uint64_t tsc_clock_freq;
#define US_TO_TICKS(x) ((x)*tsc_clock_freq/1000000UL)
extern uint64_t tsc_hz;
#define US_TO_TICKS(x) ((x) * tsc_hz / 1000000UL)
#define CYCLES_PER_MS US_TO_TICKS(1000UL)
#define TICKS_TO_US(x) ((((x) * (1000000UL >> 8)) / tsc_clock_freq) << 8)
#define TICKS_TO_MS(x) (((x) * 1000UL) / tsc_clock_freq)
#define TICKS_TO_US(x) ((((x) * (1000000UL >> 8)) / tsc_hz) << 8)
#define TICKS_TO_MS(x) (((x) * 1000UL) / tsc_hz)
static inline uint64_t rdtsc(void)
{