diff options
Diffstat (limited to 'kmod/cachepc.c')
| -rwxr-xr-x | kmod/cachepc.c | 43 |
1 files changed, 11 insertions, 32 deletions
diff --git a/kmod/cachepc.c b/kmod/cachepc.c index 702cfad..ed36ac7 100755 --- a/kmod/cachepc.c +++ b/kmod/cachepc.c @@ -18,49 +18,28 @@ static uint16_t get_virt_cache_set(cache_ctx *ctx, void *ptr); static void *aligned_alloc(size_t alignment, size_t size); void -cachepc_init_counters(void) +cachepc_init_pmc(uint8_t index, uint8_t event_no, uint8_t event_mask) { - uint64_t event, event_no, event_mask; + uint64_t event; uint64_t reg_addr; - /* SEE: https://developer.amd.com/resources/developer-guides-manuals (PPR 17H 31H, P.166) + /* REF: https://developer.amd.com/resources/developer-guides-manuals (PPR 17H 31H, P.166) * - * performance event selection is done via 0xC001_020X with X = (0..A)[::2] - * performance event reading is done viea 0XC001_020X with X = (1..B)[::2] - * - * 6 slots total + * performance event selection via 0xC001_020X with X = (0..A)[::2] + * performance event reading viea 0XC001_020X with X = (1..B)[::2] */ - reg_addr = 0xc0010200; - event_no = 0x70; - event_mask = 0xFF; - event = event_no | (event_mask << 8); - event |= (1ULL << 17); /* OS (kernel) events only */ - event |= (1ULL << 22); /* enable performance counter */ - event |= (1ULL << 40); /* Host events only */ - printk(KERN_WARNING "CachePC: Initialized event %llu\n", event); - asm volatile ("wrmsr" : : "c"(reg_addr), "a"(event), "d"(0x00)); + WARN_ON(index >= 6); + if (index >= 6) return; - reg_addr = 0xc0010202; - event_no = 0x71; - event_mask = 0xFF; - event = event_no | (event_mask << 8); - event |= (1ULL << 17); /* OS (kernel) events only */ - event |= (1ULL << 22); /* enable performance counter */ - event |= (1ULL << 40); /* Host events only */ - printk(KERN_WARNING "CachePC: Initialized event %llu\n", event); - asm volatile ("wrmsr" : : "c"(reg_addr), "a"(event), "d"(0x00)); - - reg_addr = 0xc0010204; - event_no = 0x72; - event_mask = 0xFF; - event = event_no | (event_mask << 8); + reg_addr = 0xc0010200 + index * 2; + event = event_no | (event_mask << 8); event |= (1ULL << 17); /* OS (kernel) events only */ event |= (1ULL << 22); /* enable performance counter */ event |= (1ULL << 40); /* Host events only */ - printk(KERN_WARNING "CachePC: Initialized event %llu\n", event); + printk(KERN_WARNING "CachePC: Initialized %i. PMC %02X:%02X\n", + index, event_no, event_mask); asm volatile ("wrmsr" : : "c"(reg_addr), "a"(event), "d"(0x00)); - } cache_ctx * |