diff options
Diffstat (limited to 'fs/pstore/ram.c')
| -rw-r--r-- | fs/pstore/ram.c | 72 |
1 files changed, 55 insertions, 17 deletions
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 34294c32af0b..0ed3fec04c9b 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -87,7 +87,7 @@ MODULE_PARM_DESC(ramoops_ecc, struct ramoops_context { struct persistent_ram_zone **przs; struct persistent_ram_zone *cprz; - struct persistent_ram_zone *fprz; + struct persistent_ram_zone **fprzs; struct persistent_ram_zone *mprz; phys_addr_t phys_addr; unsigned long size; @@ -97,12 +97,14 @@ struct ramoops_context { size_t ftrace_size; size_t pmsg_size; int dump_oops; + u32 flags; struct persistent_ram_ecc_info ecc_info; unsigned int max_dump_cnt; unsigned int dump_write_cnt; /* _read_cnt need clear on ramoops_pstore_open */ unsigned int dump_read_cnt; unsigned int console_read_cnt; + unsigned int max_ftrace_cnt; unsigned int ftrace_read_cnt; unsigned int pmsg_read_cnt; struct pstore_info pstore; @@ -219,9 +221,17 @@ static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, if (!prz_ok(prz)) prz = ramoops_get_next_prz(&cxt->cprz, &cxt->console_read_cnt, 1, id, type, PSTORE_TYPE_CONSOLE, 0); - if (!prz_ok(prz)) - prz = ramoops_get_next_prz(&cxt->fprz, &cxt->ftrace_read_cnt, - 1, id, type, PSTORE_TYPE_FTRACE, 0); + if (!prz_ok(prz)) { + while (cxt->ftrace_read_cnt < cxt->max_ftrace_cnt && !prz) { + prz = ramoops_get_next_prz(cxt->fprzs, + &cxt->ftrace_read_cnt, + cxt->max_ftrace_cnt, id, type, + PSTORE_TYPE_FTRACE, 0); + if (!prz_ok(prz)) + continue; + } + } + if (!prz_ok(prz)) prz = ramoops_get_next_prz(&cxt->mprz, &cxt->pmsg_read_cnt, 1, id, type, PSTORE_TYPE_PMSG, 0); @@ -283,9 +293,19 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type, persistent_ram_write(cxt->cprz, buf, size); return 0; } else if (type == PSTORE_TYPE_FTRACE) { - if (!cxt->fprz) + int zonenum; + + if (!cxt->fprzs) return -ENOMEM; - persistent_ram_write(cxt->fprz, buf, size); + /* + * Choose zone by if we're using per-cpu buffers. + */ + if (cxt->flags & RAMOOPS_FLAG_FTRACE_PER_CPU) + zonenum = smp_processor_id(); + else + zonenum = 0; + + persistent_ram_write(cxt->fprzs[zonenum], buf, size); return 0; } else if (type == PSTORE_TYPE_PMSG) { pr_warn_ratelimited("PMSG shouldn't call %s\n", __func__); @@ -363,7 +383,9 @@ static int ramoops_pstore_erase(enum pstore_type_id type, u64 id, int count, prz = cxt->cprz; break; case PSTORE_TYPE_FTRACE: - prz = cxt->fprz; + if (id >= cxt->max_ftrace_cnt) + return -EINVAL; + prz = cxt->fprzs[id]; break; case PSTORE_TYPE_PMSG: prz = cxt->mprz; @@ -394,14 +416,22 @@ static void ramoops_free_przs(struct ramoops_context *cxt) { int i; - if (!cxt->przs) - return; + /* Free dump PRZs */ + if (cxt->przs) { + for (i = 0; i < cxt->max_dump_cnt; i++) + persistent_ram_free(cxt->przs[i]); - for (i = 0; i < cxt->max_dump_cnt; i++) - persistent_ram_free(cxt->przs[i]); + kfree(cxt->przs); + cxt->max_dump_cnt = 0; + } - kfree(cxt->przs); - cxt->max_dump_cnt = 0; + /* Free ftrace PRZs */ + if (cxt->fprzs) { + for (i = 0; i < cxt->max_ftrace_cnt; i++) + persistent_ram_free(cxt->fprzs[i]); + kfree(cxt->fprzs); + cxt->max_ftrace_cnt = 0; + } } static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt, @@ -567,6 +597,7 @@ static int ramoops_parse_dt(struct platform_device *pdev, parse_size("ftrace-size", pdata->ftrace_size); parse_size("pmsg-size", pdata->pmsg_size); parse_size("ecc-size", pdata->ecc_info.ecc_size); + parse_size("flags", pdata->flags); #undef parse_size @@ -624,6 +655,7 @@ static int ramoops_probe(struct platform_device *pdev) cxt->ftrace_size = pdata->ftrace_size; cxt->pmsg_size = pdata->pmsg_size; cxt->dump_oops = pdata->dump_oops; + cxt->flags = pdata->flags; cxt->ecc_info = pdata->ecc_info; paddr = cxt->phys_addr; @@ -640,8 +672,14 @@ static int ramoops_probe(struct platform_device *pdev) if (err) goto fail_init_cprz; - err = ramoops_init_prz(dev, cxt, &cxt->fprz, &paddr, cxt->ftrace_size, - LINUX_VERSION_CODE); + cxt->max_ftrace_cnt = (cxt->flags & RAMOOPS_FLAG_FTRACE_PER_CPU) + ? nr_cpu_ids + : 1; + err = ramoops_init_przs(dev, cxt, &cxt->fprzs, &paddr, cxt->ftrace_size, + -1, &cxt->max_ftrace_cnt, + LINUX_VERSION_CODE, + (cxt->flags & RAMOOPS_FLAG_FTRACE_PER_CPU) + ? PRZ_FLAG_NO_LOCK : 0); if (err) goto fail_init_fprz; @@ -705,7 +743,6 @@ fail_clear: cxt->pstore.bufsize = 0; persistent_ram_free(cxt->mprz); fail_init_mprz: - persistent_ram_free(cxt->fprz); fail_init_fprz: persistent_ram_free(cxt->cprz); fail_init_cprz: @@ -724,7 +761,6 @@ static int ramoops_remove(struct platform_device *pdev) cxt->pstore.bufsize = 0; persistent_ram_free(cxt->mprz); - persistent_ram_free(cxt->fprz); persistent_ram_free(cxt->cprz); ramoops_free_przs(cxt); @@ -766,6 +802,8 @@ static void ramoops_register_dummy(void) dummy_data->ftrace_size = ramoops_ftrace_size; dummy_data->pmsg_size = ramoops_pmsg_size; dummy_data->dump_oops = dump_oops; + dummy_data->flags = RAMOOPS_FLAG_FTRACE_PER_CPU; + /* * For backwards compatibility ramoops.ecc=1 means 16 bytes ECC * (using 1 byte for ECC isn't much of use anyway). |