6873def900
There is at least one bug in core_busy_loop(), we use r0, but it's not in the clobber list. We were getting away with this it seems but that was luck. It's also fishy to be touching the stack, even if we do it below the stack pointer. It seems we get away with it, but looking at the generated code that may just be luck. So move it into assembler, do all the stack handling by hand. We create a stack frame to save the non-volatiles in, so we can muck around with them. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/*
|
|
* Copyright 2014, Michael Ellerman, IBM Corp.
|
|
* Licensed under GPLv2.
|
|
*/
|
|
|
|
#ifndef _SELFTESTS_POWERPC_PMU_EBB_EBB_H
|
|
#define _SELFTESTS_POWERPC_PMU_EBB_EBB_H
|
|
|
|
#include "../event.h"
|
|
#include "../lib.h"
|
|
#include "trace.h"
|
|
#include "reg.h"
|
|
|
|
#define PMC_INDEX(pmc) ((pmc)-1)
|
|
|
|
#define NUM_PMC_VALUES 128
|
|
|
|
struct ebb_state
|
|
{
|
|
struct {
|
|
u64 pmc_count[6];
|
|
volatile int ebb_count;
|
|
int spurious;
|
|
int negative;
|
|
int no_overflow;
|
|
} stats;
|
|
|
|
bool pmc_enable[6];
|
|
struct trace_buffer *trace;
|
|
};
|
|
|
|
extern struct ebb_state ebb_state;
|
|
|
|
#define COUNTER_OVERFLOW 0x80000000ull
|
|
|
|
static inline uint32_t pmc_sample_period(uint32_t value)
|
|
{
|
|
return COUNTER_OVERFLOW - value;
|
|
}
|
|
|
|
static inline void ebb_enable_pmc_counting(int pmc)
|
|
{
|
|
ebb_state.pmc_enable[PMC_INDEX(pmc)] = true;
|
|
}
|
|
|
|
bool ebb_check_count(int pmc, u64 sample_period, int fudge);
|
|
void event_leader_ebb_init(struct event *e);
|
|
void event_ebb_init(struct event *e);
|
|
void event_bhrb_init(struct event *e, unsigned ifm);
|
|
void setup_ebb_handler(void (*callee)(void));
|
|
void standard_ebb_callee(void);
|
|
int ebb_event_enable(struct event *e);
|
|
void ebb_global_enable(void);
|
|
void ebb_global_disable(void);
|
|
void ebb_freeze_pmcs(void);
|
|
void ebb_unfreeze_pmcs(void);
|
|
void event_ebb_init(struct event *e);
|
|
void event_leader_ebb_init(struct event *e);
|
|
int count_pmc(int pmc, uint32_t sample_period);
|
|
void dump_ebb_state(void);
|
|
void dump_summary_ebb_state(void);
|
|
void dump_ebb_hw_state(void);
|
|
void clear_ebb_stats(void);
|
|
void write_pmc(int pmc, u64 value);
|
|
u64 read_pmc(int pmc);
|
|
void reset_ebb_with_clear_mask(unsigned long mmcr0_clear_mask);
|
|
void reset_ebb(void);
|
|
int ebb_check_mmcr0(void);
|
|
|
|
extern u64 sample_period;
|
|
|
|
int core_busy_loop(void);
|
|
int ebb_child(union pipe read_pipe, union pipe write_pipe);
|
|
int catch_sigill(void (*func)(void));
|
|
void write_pmc1(void);
|
|
|
|
#endif /* _SELFTESTS_POWERPC_PMU_EBB_EBB_H */
|