projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
| fbe96f29 | 2 | #include <sys/types.h> |
| f67001a4 | 3 | #include <errno.h> |
| fbe96f29 SE |
4 | #include <unistd.h> |
| 5 | #include <stdio.h> | |
| 6 | #include <stdlib.h> | |
| 7 | #include <string.h> | |
| 531d2410 | 8 | #include <linux/stringify.h> |
| 379649cf | 9 | #include "header.h" |
| 33583e69 | 10 | #include "utils_header.h" |
| 1e1a873d KJ |
11 | #include "metricgroup.h" |
| 12 | #include <api/fs/fs.h> | |
| 54f9aa10 AR |
13 | #include <sys/auxv.h> |
| 14 | ||
| 15 | static bool is_compat_mode(void) | |
| 16 | { | |
| 7e442be7 LK |
17 | unsigned long base_platform = getauxval(AT_BASE_PLATFORM); |
| 18 | unsigned long platform = getauxval(AT_PLATFORM); | |
| 54f9aa10 AR |
19 | |
| 20 | if (!strcmp((char *)platform, (char *)base_platform)) | |
| 21 | return false; | |
| 22 | ||
| 23 | return true; | |
| 24 | } | |
| fbe96f29 | 25 | |
| fbe96f29 | 26 | int |
| cec0d657 | 27 | get_cpuid(char *buffer, size_t sz, struct perf_cpu cpu __maybe_unused) |
| fbe96f29 SE |
28 | { |
| 29 | unsigned long pvr; | |
| 30 | int nb; | |
| 31 | ||
| 32 | pvr = mfspr(SPRN_PVR); | |
| 33 | ||
| e7f01d1e | 34 | nb = scnprintf(buffer, sz, "%lu,%lu$", PVR_VER(pvr), PVR_REV(pvr)); |
| fbe96f29 SE |
35 | |
| 36 | /* look for end marker to ensure the entire data fit */ | |
| 37 | if (strchr(buffer, '$')) { | |
| 38 | buffer[nb-1] = '\0'; | |
| 39 | return 0; | |
| 40 | } | |
| f67001a4 | 41 | return ENOBUFS; |
| fbe96f29 | 42 | } |
| ce88f27c SB |
43 | |
| 44 | char * | |
| 494c403f | 45 | get_cpuid_str(struct perf_cpu cpu __maybe_unused) |
| ce88f27c SB |
46 | { |
| 47 | char *bufp; | |
| 54f9aa10 AR |
48 | unsigned long pvr; |
| 49 | ||
| 50 | /* | |
| 51 | * IBM Power System supports compatible mode. That is | |
| 52 | * Nth generation platform can support previous generation | |
| 53 | * OS in a mode called compatibile mode. For ex. LPAR can be | |
| 54 | * booted in a Power9 mode when the system is a Power10. | |
| 55 | * | |
| 56 | * In the compatible mode, care must be taken when generating | |
| 57 | * PVR value. When read, PVR will be of the AT_BASE_PLATFORM | |
| 58 | * To support generic events, return 0x00ffffff as pvr when | |
| 59 | * booted in compat mode. Based on this pvr value, json will | |
| 60 | * pick events from pmu-events/arch/powerpc/compat | |
| 61 | */ | |
| 62 | if (!is_compat_mode()) | |
| 63 | pvr = mfspr(SPRN_PVR); | |
| 64 | else | |
| 65 | pvr = 0x00ffffff; | |
| ce88f27c | 66 | |
| 54f9aa10 | 67 | if (asprintf(&bufp, "0x%.8lx", pvr) < 0) |
| ce88f27c SB |
68 | bufp = NULL; |
| 69 | ||
| 70 | return bufp; | |
| 71 | } | |
| 1e1a873d | 72 | |
| db95818e | 73 | int arch_get_runtimeparam(const struct pmu_metric *pm) |
| 1e1a873d KJ |
74 | { |
| 75 | int count; | |
| f5a489dc KJ |
76 | char path[PATH_MAX] = "/devices/hv_24x7/interface/"; |
| 77 | ||
| 1fa0c371 | 78 | strcat(path, pm->aggr_mode == PerChip ? "sockets" : "coresperchip"); |
| f5a489dc | 79 | return sysfs__read_int(path, &count) < 0 ? 1 : count; |
| 1e1a873d | 80 | } |