diff options
| -rw-r--r-- | MAINTAINERS | 2 | ||||
| -rw-r--r-- | drivers/acpi/apei/ghes.c | 84 | ||||
| -rw-r--r-- | drivers/cxl/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/cxl/acpi.c | 93 | ||||
| -rw-r--r-- | drivers/cxl/core/core.h | 14 | ||||
| -rw-r--r-- | drivers/cxl/core/hdm.c | 13 | ||||
| -rw-r--r-- | drivers/cxl/core/mbox.c | 48 | ||||
| -rw-r--r-- | drivers/cxl/core/memdev.c | 44 | ||||
| -rw-r--r-- | drivers/cxl/core/region.c | 177 | ||||
| -rw-r--r-- | drivers/cxl/core/trace.c | 91 | ||||
| -rw-r--r-- | drivers/cxl/core/trace.h | 50 | ||||
| -rw-r--r-- | drivers/cxl/cxl.h | 7 | ||||
| -rw-r--r-- | drivers/cxl/cxlmem.h | 3 | ||||
| -rw-r--r-- | drivers/cxl/pci.c | 71 | ||||
| -rw-r--r-- | drivers/cxl/pmem.c | 2 | ||||
| -rw-r--r-- | include/linux/cxl-event.h | 39 | ||||
| -rw-r--r-- | include/uapi/linux/cxl_mem.h | 3 | ||||
| -rw-r--r-- | tools/testing/cxl/test/mem.c | 19 |
18 files changed, 527 insertions, 234 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index c4a192a73adb..c4e39b7cd472 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5407,7 +5407,7 @@ M: Dan Williams <dan.j.williams@intel.com> L: linux-cxl@vger.kernel.org S: Maintained F: drivers/cxl/ -F: include/linux/cxl-einj.h +F: include/linux/einj-cxl.h F: include/linux/cxl-event.h F: include/uapi/linux/cxl_mem.h F: tools/testing/cxl/ diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 512067cac170..623cc0cb4a65 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -26,6 +26,8 @@ #include <linux/interrupt.h> #include <linux/timer.h> #include <linux/cper.h> +#include <linux/cleanup.h> +#include <linux/cxl-event.h> #include <linux/platform_device.h> #include <linux/mutex.h> #include <linux/ratelimit.h> @@ -33,6 +35,7 @@ #include <linux/irq_work.h> #include <linux/llist.h> #include <linux/genalloc.h> +#include <linux/kfifo.h> #include <linux/pci.h> #include <linux/pfn.h> #include <linux/aer.h> @@ -673,6 +676,75 @@ static void ghes_defer_non_standard_event(struct acpi_hest_generic_data *gdata, schedule_work(&entry->work); } +/* Room for 8 entries for each of the 4 event log queues */ +#define CXL_CPER_FIFO_DEPTH 32 +DEFINE_KFIFO(cxl_cper_fifo, struct cxl_cper_work_data, CXL_CPER_FIFO_DEPTH); + +/* Synchronize schedule_work() with cxl_cper_work changes */ +static DEFINE_SPINLOCK(cxl_cper_work_lock); +struct work_struct *cxl_cper_work; + +static void cxl_cper_post_event(enum cxl_event_type event_type, + struct cxl_cper_event_rec *rec) +{ + struct cxl_cper_work_data wd; + + if (rec->hdr.length <= sizeof(rec->hdr) || + rec->hdr.length > sizeof(*rec)) { + pr_err(FW_WARN "CXL CPER Invalid section length (%u)\n", + rec->hdr.length); + return; + } + + if (!(rec->hdr.validation_bits & CPER_CXL_COMP_EVENT_LOG_VALID)) { + pr_err(FW_WARN "CXL CPER invalid event\n"); + return; + } + + guard(spinlock_irqsave)(&cxl_cper_work_lock); + + if (!cxl_cper_work) + return; + + wd.event_type = event_type; + memcpy(&wd.rec, rec, sizeof(wd.rec)); + + if (!kfifo_put(&cxl_cper_fifo, wd)) { + pr_err_ratelimited("CXL CPER kfifo overflow\n"); + return; + } + + schedule_work(cxl_cper_work); +} + +int cxl_cper_register_work(struct work_struct *work) +{ + if (cxl_cper_work) + return -EINVAL; + + guard(spinlock)(&cxl_cper_work_lock); + cxl_cper_work = work; + return 0; +} +EXPORT_SYMBOL_NS_GPL(cxl_cper_register_work, CXL); + +int cxl_cper_unregister_work(struct work_struct *work) +{ + if (cxl_cper_work != work) + return -EINVAL; + + guard(spinlock)(&cxl_cper_work_lock); + cxl_cper_work = NULL; + return 0; +} +EXPORT_SYMBOL_NS_GPL(cxl_cper_unregister_work, CXL); + +int cxl_cper_kfifo_get(struct cxl_cper_work_data *wd) +{ + return kfifo_get(&cxl_cper_fifo, wd); +} +EXPORT_SYMBOL_NS_GPL(cxl_cper_kfifo_get, CXL); + static bool ghes_do_proc(struct ghes *ghes, const struct acpi_hest_generic_status *estatus) { @@ -707,6 +779,18 @@ static bool ghes_do_proc(struct ghes *ghes, } else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) { queued = ghes_handle_arm_hw_error(gdata, sev, sync); + } else if (guid_equal(sec_type, &CPER_SEC_CXL_GEN_MEDIA_GUID)) { + struct cxl_cper_event_rec *rec = acpi_hest_get_payload(gdata); + + cxl_cper_post_event(CXL_CPER_EVENT_GEN_MEDIA, rec); + } else if (guid_equal(sec_type, &CPER_SEC_CXL_DRAM_GUID)) { + struct cxl_cper_event_rec *rec = acpi_hest_get_payload(gdata); + + cxl_cper_post_event(CXL_CPER_EVENT_DRAM, rec); + } else if (guid_equal(sec_type, &CPER_SEC_CXL_MEM_MODULE_GUID)) { + struct cxl_cper_event_rec *rec = acpi_hest_get_payload(gdata); + + cxl_cper_post_event(CXL_CPER_EVENT_MEM_MODULE, rec); } else { void *err = acpi_hest_get_payload(gdata); diff --git a/drivers/cxl/Kconfig b/drivers/cxl/Kconfig index 5f3c9c5529b9..99b5c25be079 100644 --- a/drivers/cxl/Kconfig +++ b/drivers/cxl/Kconfig @@ -6,6 +6,7 @@ menuconfig CXL_BUS select FW_UPLOAD select PCI_DOE select FIRMWARE_TABLE + select NUMA_KEEP_MEMINFO if (NUMA && X86) help CXL is a bus that is electrically compatible with PCI Express, but layers three protocols on that signalling (CXL.io, CXL.cache, and diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c index cb8c155a2c9b..571069863c62 100644 --- a/drivers/cxl/acpi.c +++ b/drivers/cxl/acpi.c @@ -316,28 +316,59 @@ static const struct cxl_root_ops acpi_root_ops = { .qos_class = cxl_acpi_qos_class, }; +static void del_cxl_resource(struct resource *res) +{ + if (!res) + return; + kfree(res->name); + kfree(res); +} + +static struct resource *alloc_cxl_resource(resource_size_t base, + resource_size_t n, int id) +{ + struct resource *res __free(kfree) = kzalloc(sizeof(*res), GFP_KERNEL); + + if (!res) + return NULL; + + res->start = base; + res->end = base + n - 1; + res->flags = IORESOURCE_MEM; + res->name = kasprintf(GFP_KERNEL, "CXL Window %d", id); + if (!res->name) + return NULL; + + return no_free_ptr(res); +} + +static int add_or_reset_cxl_resource(struct resource *parent, struct resource *res) +{ + int rc = insert_resource(parent, res); + + if (rc) + del_cxl_resource(res); + return rc; +} + +DEFINE_FREE(put_cxlrd, struct cxl_root_decoder *, + if (!IS_ERR_OR_NULL(_T)) put_device(&_T->cxlsd.cxld.dev)) +DEFINE_FREE(del_cxl_resource, struct resource *, if (_T) del_cxl_resource(_T)) static int __cxl_parse_cfmws(struct acpi_cedt_cfmws *cfmws, struct cxl_cfmws_context *ctx) { int target_map[CXL_DECODER_MAX_INTERLEAVE]; struct cxl_port *root_port = ctx->root_port; - struct resource *cxl_res = ctx->cxl_res; struct cxl_cxims_context cxims_ctx; - struct cxl_root_decoder *cxlrd; struct device *dev = ctx->dev; cxl_calc_hb_fn cxl_calc_hb; struct cxl_decoder *cxld; unsigned int ways, i, ig; - struct resource *res; int rc; rc = cxl_acpi_cfmws_verify(dev, cfmws); - if (rc) { - dev_err(dev, "CFMWS range %#llx-%#llx not registered\n", - cfmws->base_hpa, - cfmws->base_hpa + cfmws->window_size - 1); + if (rc) return rc; - } rc = eiw_to_ways(cfmws->interleave_ways, &ways); if (rc) @@ -348,29 +379,23 @@ static int __cxl_parse_cfmws(struct acpi_cedt_cfmws *cfmws, for (i = 0; i < ways; i++) target_map[i] = cfmws->interleave_targets[i]; - res = kzalloc(sizeof(*res), GFP_KERNEL); + struct resource *res __free(del_cxl_resource) = alloc_cxl_resource( + cfmws->base_hpa, cfmws->window_size, ctx->id++); if (!res) return -ENOMEM; - res->name = kasprintf(GFP_KERNEL, "CXL Window %d", ctx->id++); - if (!res->name) - goto err_name; - - res->start = cfmws->base_hpa; - res->end = cfmws->base_hpa + cfmws->window_size - 1; - res->flags = IORESOURCE_MEM; - /* add to the local resource tracking to establish a sort order */ - rc = insert_resource(cxl_res, res); + rc = add_or_reset_cxl_resource(ctx->cxl_res, no_free_ptr(res)); if (rc) - goto err_insert; + return rc; if (cfmws->interleave_arithmetic == ACPI_CEDT_CFMWS_ARITHMETIC_MODULO) cxl_calc_hb = cxl_hb_modulo; else cxl_calc_hb = cxl_hb_xor; - cxlrd = cxl_root_decoder_alloc(root_port, ways, cxl_calc_hb); + struct cxl_root_decoder *cxlrd __free(put_cxlrd) = + cxl_root_decoder_alloc(root_port, ways, cxl_calc_hb); if (IS_ERR(cxlrd)) return PTR_ERR(cxlrd); @@ -378,8 +403,8 @@ static int __cxl_parse_cfmws(struct acpi_cedt_cfmws *cfmws, cxld->flags = cfmws_to_decoder_flags(cfmws->restrictions); cxld->target_type = CXL_DECODER_HOSTONLYMEM; cxld->hpa_range = (struct range) { - .start = res->start, - .end = res->end, + .start = cfmws->base_hpa, + .end = cfmws->base_hpa + cfmws->window_size - 1, }; cxld->interleave_ways = ways; /* @@ -399,11 +424,10 @@ static int __cxl_parse_cfmws(struct acpi_cedt_cfmws *cfmws, rc = acpi_table_parse_cedt(ACPI_CEDT_TYPE_CXIMS, cxl_parse_cxims, &cxims_ctx); if (rc < 0) - goto err_xormap; + return rc; if (!cxlrd->platform_data) { dev_err(dev, "No CXIMS for HBIG %u\n", ig); - rc = -EINVAL; - goto err_xormap; + return -EINVAL; } } } @@ -411,18 +435,9 @@ static int __cxl_parse_cfmws(struct acpi_cedt_cfmws *cfmws, cxlrd->qos_class = cfmws->qtg_id; rc = cxl_decoder_add(cxld, target_map); -err_xormap: if (rc) - put_device(&cxld->dev); - else - rc = cxl_decoder_autoremove(dev, cxld); - return rc; - -err_insert: - kfree(res->name); -err_name: - kfree(res); - return -ENOMEM; + return rc; + return cxl_root_decoder_autoremove(dev, no_free_ptr(cxlrd)); } static int cxl_parse_cfmws(union acpi_subtable_headers *header, void *arg, @@ -683,12 +698,6 @@ static void cxl_acpi_lock_reset_class(void *dev) device_lock_reset_class(dev); } -static void del_cxl_resource(struct resource *res) -{ - kfree(res->name); - kfree(res); -} - static void cxl_set_public_resource(struct resource *priv, struct resource *pub) { priv->desc = (unsigned long) pub; diff --git a/drivers/cxl/core/core.h b/drivers/cxl/core/core.h index bc5a95665aa0..625394486459 100644 --- a/drivers/cxl/core/core.h +++ b/drivers/cxl/core/core.h @@ -27,7 +27,21 @@ void cxl_decoder_kill_region(struct cxl_endpoint_decoder *cxled); int cxl_region_init(void); void cxl_region_exit(void); int cxl_get_poison_by_endpoint(struct cxl_port *port); +struct cxl_region *cxl_dpa_to_region(const struct cxl_memdev *cxlmd, u64 dpa); +u64 cxl_trace_hpa(struct cxl_region *cxlr, const struct cxl_memdev *cxlmd, + u64 dpa); + #else +static inline u64 +cxl_trace_hpa(struct cxl_region *cxlr, const struct cxl_memdev *cxlmd, u64 dpa) +{ + return ULLONG_MAX; +} +static inline +struct cxl_region *cxl_dpa_to_region(const struct cxl_memdev *cxlmd, u64 dpa) +{ + return NULL; +} static inline int cxl_get_poison_by_endpoint(struct cxl_port *port) { return 0; diff --git a/drivers/cxl/core/hdm.c b/drivers/cxl/core/hdm.c index 7d97790b893d..784843fa2a22 100644 --- a/drivers/cxl/core/hdm.c +++ b/drivers/cxl/core/hdm.c @@ -319,8 +319,8 @@ static int __cxl_dpa_reserve(struct cxl_endpoint_decoder *cxled, else if (resource_contains(&cxlds->ram_res, res)) cxled->mode = CXL_DECODER_RAM; else { - dev_dbg(dev, "decoder%d.%d: %pr mixed\n", port->id, - cxled->cxld.id, cxled->dpa_res); + dev_warn(dev, "decoder%d.%d: %pr mixed mode not supported\n", + port->id, cxled->cxld.id, cxled->dpa_res); cxled->mode = CXL_DECODER_MIXED; } @@ -519,8 +519,7 @@ int cxl_dpa_alloc(struct cxl_endpoint_decoder *cxled, unsigned long long size) if (size > avail) { dev_dbg(dev, "%pa exceeds available %s capacity: %pa\n", &size, - cxled->mode == CXL_DECODER_RAM ? "ram" : "pmem", - &avail); + cxl_decoder_mode_name(cxled->mode), &avail); rc = -ENOSPC; goto out; } @@ -888,8 +887,12 @@ static int init_hdm_decoder(struct cxl_port *port, struct cxl_decoder *cxld, } rc = eig_to_granularity(FIELD_GET(CXL_HDM_DECODER0_CTRL_IG_MASK, ctrl), &cxld->interleave_granularity); - if (rc) + if (rc) { + dev_warn(&port->dev, + "decoder%d.%d: Invalid interleave granularity (ctrl: %#x)\n", + port->id, cxld->id, ctrl); return rc; + } dev_dbg(&port->dev, "decoder%d.%d: range: %#llx-%#llx iw: %d ig: %d\n", port->id, cxld->id, cxld->hpa_range.start, cxld->hpa_range.end, diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 65185c9fa001..2626f3fff201 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -56,6 +56,9 @@ static struct cxl_mem_command cxl_mem_commands[CXL_MEM_COMMAND_ID_MAX] = { CXL_CMD(GET_LSA, 0x8, CXL_VARIABLE_PAYLOAD, 0), CXL_CMD(GET_HEALTH_INFO, 0, 0x12, 0), CXL_CMD(GET_LOG, 0x18, CXL_VARIABLE_PAYLOAD, CXL_CMD_FLAG_FORCE_ENABLE), + CXL_CMD(GET_LOG_CAPS, 0x10, 0x4, 0), + CXL_CMD(CLEAR_LOG, 0x10, 0, 0), + CXL_CMD(GET_SUP_LOG_SUBLIST, 0x2, CXL_VARIABLE_PAYLOAD, 0), CXL_CMD(SET_PARTITION_INFO, 0x0a, 0, 0), CXL_CMD(SET_LSA, CXL_VARIABLE_PAYLOAD, 0, 0), CXL_CMD(GET_ALERT_CONFIG, 0, 0x10, 0), @@ -331,6 +334,15 @@ static bool cxl_payload_from_user_allowed(u16 opcode, void *payload_in) return false; break; } + case CXL_MBOX_OP_CLEAR_LOG: { + const uuid_t *uuid = (uuid_t *)payload_in; + + /* + * Restrict the ‘Clear log’ action to only apply to + * Vendor debug logs. + */ + return uuid_equal(uuid, &DEFINE_CXL_VENDOR_DEBUG_UUID); + } default: break; } @@ -842,14 +854,38 @@ void cxl_event_trace_record(const struct cxl_memdev *cxlmd, enum cxl_event_type event_type, const uuid_t *uuid, union cxl_event *evt) { - if (event_type == CXL_CPER_EVENT_GEN_MEDIA) - trace_cxl_general_media(cxlmd, type, &evt->gen_media); - else if (event_type == CXL_CPER_EVENT_DRAM) - trace_cxl_dram(cxlmd, type, &evt->dram); - else if (event_type == CXL_CPER_EVENT_MEM_MODULE) + if (event_type == CXL_CPER_EVENT_MEM_MODULE) { trace_cxl_memory_module(cxlmd, type, &evt->mem_module); - else + return; + } + if (event_type == CXL_CPER_EVENT_GENERIC) { trace_cxl_generic_event(cxlmd, type, uuid, &evt->generic); + return; + } + + if (trace_cxl_general_media_enabled() || trace_cxl_dram_enabled()) { + u64 dpa, hpa = ULLONG_MAX; + struct cxl_region *cxlr; + + /* + * These trace points are annotated with HPA and region + * translations. Take topology mutation locks and lookup + * { HPA, REGION } from { DPA, MEMDEV } in the event record. + */ + guard(rwsem_read)(&cxl_region_rwsem); + guard(rwsem_read)(&cxl_dpa_rwsem); + + dpa = le64_to_cpu(evt->common.phys_addr) & CXL_DPA_MASK; + cxlr = cxl_dpa_to_region(cxlmd, dpa); + if (cxlr) + hpa = cxl_trace_hpa(cxlr, cxlmd, dpa); + + if (event_type == CXL_CPER_EVENT_GEN_MEDIA) + trace_cxl_general_media(cxlmd, type, cxlr, hpa, + &evt->gen_media); + else if (event_type == CXL_CPER_EVENT_DRAM) + trace_cxl_dram(cxlmd, type, cxlr, hpa, &evt->dram); + } } EXPORT_SYMBOL_NS_GPL(cxl_event_trace_record, CXL); diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c index d4e259f3a7e9..0277726afd04 100644 --- a/drivers/cxl/core/memdev.c +++ b/drivers/cxl/core/memdev.c @@ -251,50 +251,6 @@ int cxl_trigger_poison_list(struct cxl_memdev *cxlmd) } EXPORT_SYMBOL_NS_GPL(cxl_trigger_poison_list, CXL); -struct cxl_dpa_to_region_context { - struct cxl_region *cxlr; - u64 dpa; -}; - -static int __cxl_dpa_to_region(struct device *dev, void *arg) -{ - struct cxl_dpa_to_region_context *ctx = arg; - struct cxl_endpoint_decoder *cxled; - u64 dpa = ctx->dpa; - - if (!is_endpoint_decoder(dev)) - return 0; - - cxled = to_cxl_endpoint_decoder(dev); - if (!cxled->dpa_res || !resource_size(cxled->dpa_res)) - return 0; - - if (dpa > cxled->dpa_res->end || dpa < cxled->dpa_res->start) - return 0; - - dev_dbg(dev, "dpa:0x%llx mapped in region:%s\n", dpa, - dev_name(&cxled->cxld.region->dev)); - - ctx->cxlr = cxled->cxld.region; - - return 1; -} - -static struct cxl_region *cxl_dpa_to_region(struct cxl_memdev *cxlmd, u64 dpa) -{ - struct cxl_dpa_to_region_context ctx; - struct cxl_port *port; - - ctx = (struct cxl_dpa_to_region_context) { - .dpa = dpa, - }; - port = cxlmd->endpoint; - if (port && is_cxl_endpoint(port) && cxl_num_decoders_committed(port)) - device_for_each_child(&port->dev, &ctx, __cxl_dpa_to_region); - - return ctx.cxlr; -} - static int cxl_validate_poison_dpa(struct cxl_memdev *cxlmd, u64 dpa) { struct cxl_dev_state *cxlds = cxlmd->cxlds; diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index 5c186e0a39b9..00a9f0eef8dd 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -2679,28 +2679,158 @@ int cxl_get_poison_by_endpoint(struct cxl_port *port) return rc; } +struct cxl_dpa_to_region_context { + struct cxl_region *cxlr; + u64 dpa; +}; + +static int __cxl_dpa_to_region(struct device *dev, void *arg) +{ + struct cxl_dpa_to_region_context *ctx = arg; + struct cxl_endpoint_decoder *cxled; + u64 dpa = ctx->dpa; + + if (!is_endpoint_decoder(dev)) + return 0; + + cxled = to_cxl_endpoint_decoder(dev); + if (!cxled->dpa_res || !resource_size(cxled->dpa_res)) + return 0; + + if (dpa > cxled->dpa_res->end || dpa < cxled->dpa_res->start) + return 0; + + dev_dbg(dev, "dpa:0x%llx mapped in region:%s\n", dpa, + dev_name(&cxled->cxld.region->dev)); + + ctx->cxlr = cxled->cxld.region; + + return 1; +} + +struct cxl_region *cxl_dpa_to_region(const struct cxl_memdev *cxlmd, u64 dpa) +{ + struct cxl_dpa_to_region_context ctx; + struct cxl_port *port; + + ctx = (struct cxl_dpa_to_region_context) { + .dpa = dpa, + }; + port = cxlmd->endpoint; + if (port && is_cxl_endpoint(port) && cxl_num_decoders_committed(port)) + device_for_each_child(&port->dev, &ctx, __cxl_dpa_to_region); + + return ctx.cxlr; +} + +static bool cxl_is_hpa_in_range(u64 hpa, struct cxl_region *cxlr, int pos) +{ + struct cxl_region_params *p = &cxlr->params; + int gran = p->interleave_granularity; + int ways = p->interleave_ways; + u64 offset; + + /* Is the hpa within this region at all */ + if (hpa < p->res->start || hpa > p->res->end) { + dev_dbg(&cxlr->dev, + "Addr trans fail: hpa 0x%llx not in region\n", hpa); + return false; + } + + /* Is the hpa in an expected chunk for its pos(-ition) */ + offset = hpa - p->res->start; + offset = do_div(offset, gran * ways); + if ((offset >= pos * gran) && (offset < (pos + 1) * gran)) + return true; + + dev_dbg(&cxlr->dev, + "Addr trans fail: hpa 0x%llx not in expected chunk\n", hpa); + + return false; +} + +static u64 cxl_dpa_to_hpa(u64 dpa, struct cxl_region *cxlr, + struct cxl_endpoint_decoder *cxled) +{ + u64 dpa_offset, hpa_offset, bits_upper, mask_upper, hpa; + struct cxl_region_params *p = &cxlr->params; + int pos = cxled->pos; + u16 eig = 0; + u8 eiw = 0; + + ways_to_eiw(p->interleave_ways, &eiw); + granularity_to_eig(p->interleave_granularity, &eig); + + /* + * The device position in the region interleave set was removed + * from the offset at HPA->DPA translation. To reconstruct the + * HPA, place the 'pos' in the offset. + * + * The placement of 'pos' in the HPA is determined by interleave + * ways and granularity and is defined in the CXL Spec 3.0 Section + * 8.2.4.19.13 Implementation Note: Device Decode Logic + */ + + /* Remove the dpa base */ + dpa_offset = dpa - cxl_dpa_resource_start(cxled); + + mask_upper = GENMASK_ULL(51, eig + 8); + + if (eiw < 8) { + hpa_offset = (dpa_offset & mask_upper) << eiw; + hpa_offset |= pos << (eig + 8); + } else { + bits_upper = (dpa_offset & mask_upper) >> (eig + 8); + bits_upper = bits_upper * 3; + hpa_offset = ((bits_upper << (eiw - 8)) + pos) << (eig + 8); + } + + /* The lower bits remain unchanged */ + hpa_offset |= dpa_offset & GENMASK_ULL(eig + 7, 0); + + /* Apply the hpa_offset to the region base address */ + hpa = hpa_offset + p->res->start; + + if (!cxl_is_hpa_in_range(hpa, cxlr, cxled->pos)) + return ULLONG_MAX; + + return hpa; +} + +u64 cxl_trace_hpa(struct cxl_region *cxlr, const struct cxl_memdev *cxlmd, + u64 dpa) +{ + struct cxl_region_params *p = &cxlr->params; + struct cxl_endpoint_decoder *cxled = NULL; + + for (int i = 0; i < p->nr_targets; i++) { + cxled = p->targets[i]; + if (cxlmd == cxled_to_memdev(cxled)) + break; + } + if (!cxled || cxlmd != cxled_to_memdev(cxled)) + return ULLONG_MAX; + + return cxl_dpa_to_hpa(dpa, cxlr, cxled); +} + static struct lock_class_key cxl_pmem_region_key; -static struct cxl_pmem_region *cxl_pmem_region_alloc(struct cxl_region *cxlr) +static int cxl_pmem_region_alloc(struct cxl_region *cxlr) { struct cxl_region_params *p = &cxlr->params; struct cxl_nvdimm_bridge *cxl_nvb; - struct cxl_pmem_region *cxlr_pmem; struct device *dev; int i; - down_read(&cxl_region_rwsem); - if (p->state != CXL_CONFIG_COMMIT) { - cxlr_pmem = ERR_PTR(-ENXIO); - goto out; - } + guard(rwsem_read)(&cxl_region_rwsem); + if (p->state != CXL_CONFIG_COMMIT) + return -ENXIO; - cxlr_pmem = kzalloc(struct_size(cxlr_pmem, mapping, p->nr_targets), - GFP_KERNEL); - if (!cxlr_pmem) { - cxlr_pmem = ERR_PTR(-ENOMEM); - goto out; - } + struct cxl_pmem_region *cxlr_pmem __free(kfree) = + kzalloc(struct_size(cxlr_pmem, mapping, p->nr_targets), GFP_KERNEL); + if (!cxlr_pmem) + return -ENOMEM; cxlr_pmem->hpa_range.start = p->res->start; cxlr_pmem->hpa_range.end = p->res->end; @@ -2718,10 +2848,8 @@ static struct cxl_pmem_region *cxl_pmem_region_alloc(struct cxl_region *cxlr) */ if (i == 0) { cxl_nvb = cxl_find_nvdimm_bridge(cxlmd); - if (!cxl_nvb) { - cxlr_pmem = ERR_PTR(-ENODEV); - goto out; - } + if (!cxl_nvb) + return -ENODEV; cxlr->cxl_nvb = cxl_nvb; } m->cxlmd = cxlmd; @@ -2732,18 +2860,16 @@ static struct cxl_pmem_region *cxl_pmem_region_alloc(struct cxl_region *cxlr) } dev = &cxlr_pmem->dev; - cxlr_pmem->cxlr = cxlr; - cxlr->cxlr_pmem = cxlr_pmem; device_initialize(dev); lockdep_set_class(&dev->mutex, &cxl_pmem_region_key); device_set_pm_not_required(dev); dev->parent = &cxlr->dev; dev->bus = &cxl_bus_type; dev->type = &cxl_pmem_region_type; -out: - up_read(&cxl_region_rwsem); + cxlr_pmem->cxlr = cxlr; + cxlr->cxlr_pmem = no_free_ptr(cxlr_pmem); - return cxlr_pmem; + return 0; } static void cxl_dax_region_release(struct device *dev) @@ -2860,9 +2986,10 @@ static int devm_cxl_add_pmem_region(struct cxl_region *cxlr) struct device *dev; int rc; - cxlr_pmem = cxl_pmem_region_alloc(cxlr); - if (IS_ERR(cxlr_pmem)) - return PTR_ERR(cxlr_pmem); + rc = cxl_pmem_region_alloc(cxlr); + if (rc) + return rc; + cxlr_pmem = cxlr->cxlr_pmem; cxl_nvb = cxlr->cxl_nvb; dev = &cxlr_pmem->dev; diff --git a/drivers/cxl/core/trace.c b/drivers/cxl/core/trace.c index d0403dc3c8ab..7f2a9dd0d0e3 100644 --- a/drivers/cxl/core/trace.c +++ b/drivers/cxl/core/trace.c @@ -6,94 +6,3 @@ #define CREATE_TRACE_POINTS #include "trace.h" - -static bool cxl_is_hpa_in_range(u64 hpa, struct cxl_region *cxlr, int pos) -{ - struct cxl_region_params *p = &cxlr->params; - int gran = p->interleave_granularity; - int ways = p->interleave_ways; - u64 offset; - - /* Is the hpa within this region at all */ - if (hpa < p->res->start || hpa > p->res->end) { - dev_dbg(&cxlr->dev, - "Addr trans fail: hpa 0x%llx not in region\n", hpa); - return false; - } - - /* Is the hpa in an expected chunk for its pos(-ition) */ - offset = hpa - p->res->start; - offset = do_div(offset, gran * ways); - if ((offset >= pos * gran) && (offset < (pos + 1) * gran)) - return true; - - dev_dbg(&cxlr->dev, - "Addr trans fail: hpa 0x%llx not in expected chunk\n", hpa); - - return false; -} - -static u64 cxl_dpa_to_hpa(u64 dpa, struct cxl_region *cxlr, - struct cxl_endpoint_decoder *cxled) -{ - u64 dpa_offset, hpa_offset, bits_upper, mask_upper, hpa; - struct cxl_region_params *p = &cxlr->params; - int pos = cxled->pos; - u16 eig = 0; - u8 eiw = 0; - - ways_to_eiw(p->interleave_ways, &eiw); - granularity_to_eig(p->interleave_granularity, &eig); - - /* - * The device position in the region interleave set was removed - * from the offset at HPA->DPA translation. To reconstruct the - * HPA, place the 'pos' in the offset. - * - * The placement of 'pos' in the HPA is determined by interleave - * ways and granularity and is defined in the CXL Spec 3.0 Section - * 8.2.4.19.13 Implementation Note: Device Decode Logic - */ - - /* Remove the dpa base */ - dpa_offset = dpa - cxl_dpa_resource_start(cxled); - - mask_upper = GENMASK_ULL(51, eig + 8); - - if (eiw < 8) { - hpa_offset = (dpa_offset & mask_upper) << eiw; - hpa_offset |= pos << (eig + 8); - } else { - bits_upper = (dpa_offset & mask_upper) >> (eig + 8); - bits_upper = bits_upper * 3; - hpa_offset = ((bits_upper << (eiw - 8)) + pos) << (eig + 8); - } - - /* The lower bits remain unchanged */ - hpa_offset |= dpa_offset & GENMASK_ULL(eig + 7, 0); - - /* Apply the hpa_offset to the region base address */ - hpa = hpa_offset + p->res->start; - - if (!cxl_is_hpa_in_range(hpa, cxlr, cxled->pos)) - return ULLONG_MAX; - - return hpa; -} - -u64 cxl_trace_hpa(struct cxl_region *cxlr, struct cxl_memdev *cxlmd, - u64 dpa) -{ - struct cxl_region_params *p = &cxlr->params; - struct cxl_endpoint_decoder *cxled = NULL; - - for (int i = 0; i < p->nr_targets; i++) { - cxled = p->targets[i]; - if (cxlmd == cxled_to_memdev(cxled)) - break; - } - if (!cxled || cxlmd != cxled_to_memdev(cxled)) - return ULLONG_MAX; - - return cxl_dpa_to_hpa(dpa, cxlr, cxled); -} diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h index e5f13260fc52..07a0394b1d99 100644 --- a/drivers/cxl/core/trace.h +++ b/drivers/cxl/core/trace.h @@ -253,8 +253,8 @@ TRACE_EVENT(cxl_generic_event, * DRAM Event Record * CXL rev 3.0 section 8.2.9.2.1.2; Table 8-44 */ -#define CXL_DPA_FLAGS_MASK 0x3F -#define CXL_DPA_MASK (~CXL_DPA_FLAGS_MASK) +#define CXL_DPA_FLAGS_MASK GENMASK(1, 0) +#define CXL_DPA_MASK GENMASK_ULL(63, 6) #define CXL_DPA_VOLATILE BIT(0) #define CXL_DPA_NOT_REPAIRABLE BIT(1) @@ -316,9 +316,9 @@ TRACE_EVENT(cxl_generic_event, TRACE_EVENT(cxl_general_media, TP_PROTO(const struct cxl_memdev *cxlmd, enum cxl_event_log_type log, - struct cxl_event_gen_media *rec), + struct cxl_region *cxlr, u64 hpa, struct cxl_event_gen_media *rec), - TP_ARGS(cxlmd, log, rec), + TP_ARGS(cxlmd, log, cxlr, hpa, rec), TP_STRUCT__entry( CXL_EVT_TP_entry @@ -330,10 +330,13 @@ TRACE_EVENT(cxl_general_media, __field(u8, channel) __field(u32, device) __array(u8, comp_id, CXL_EVENT_GEN_MED_COMP_ID_SIZE) - __field(u16, validity_flags) /* Following are out of order to pack trace record */ + __field(u64, hpa) + __field_struct(uuid_t, region_uuid) + __field(u16, validity_flags) __field(u8, rank) __field(u8, dpa_flags) + __string(region_name, cxlr ? dev_name(&cxlr->dev) : "") ), TP_fast_assign( @@ -354,18 +357,28 @@ TRACE_EVENT(cxl_general_media, memcpy(__entry->comp_id, &rec->component_id, CXL_EVENT_GEN_MED_COMP_ID_SIZE); __entry->validity_flags = get_unaligned_le16(&rec->validity_flags); + __entry->hpa = hpa; + if (cxlr) { + __assign_str(region_name, dev_name(&cxlr->dev)); + uuid_copy(&__entry->region_uuid, &cxlr->params.uuid); + } else { + __assign_str(region_name, ""); + uuid_copy(&__entry->region_uuid, &uuid_null); + } ), CXL_EVT_TP_printk("dpa=%llx dpa_flags='%s' " \ "descriptor='%s' type='%s' transaction_type='%s' channel=%u rank=%u " \ - "device=%x comp_id=%s validity_flags='%s'", + "device=%x comp_id=%s validity_flags='%s' " \ + "hpa=%llx region=%s region_uuid=%pUb", __entry->dpa, show_dpa_flags(__entry->dpa_flags), show_event_desc_flags(__entry->descriptor), show_mem_event_type(__entry->type), show_trans_type(__entry->transaction_type), __entry->channel, __entry->rank, __entry->device, __print_hex(__entry->comp_id, CXL_EVENT_GEN_MED_COMP_ID_SIZE), - show_valid_flags(__entry->validity_flags) + show_valid_flags(__entry->validity_flags), + __entry->hpa, __get_str(region_name), &__entry->region_uuid ) ); @@ -400,9 +413,9 @@ TRACE_EVENT(cxl_general_media, TRACE_EVENT(cxl_dram, TP_PROTO(const struct cxl_memdev *cxlmd, enum cxl_event_log_type log, - struct cxl_event_dram *rec), + struct cxl_region *cxlr, u64 hpa, struct cxl_event_dram *rec), - TP_ARGS(cxlmd, log, rec), + TP_ARGS(cxlmd, log, cxlr, hpa, rec), TP_STRUCT__entry( CXL_EVT_TP_entry @@ -417,10 +430,13 @@ TRACE_EVENT(cxl_dram, __field(u32, nibble_mask) __field(u32, row) __array(u8, cor_mask, CXL_EVENT_DER_CORRECTION_MASK_SIZE) + __field(u64, hpa) + __field_struct(uuid_t, region_uuid) __field(u8, rank) /* Out of order to pack trace record */ __field(u8, bank_group) /* Out of order to pack trace record */ __field(u8, bank) /* Out of order to pack trace record */ __field(u8, dpa_flags) /* Out of order to pack trace record */ + __string(region_name, cxlr ? dev_name(&cxlr->dev) : "") ), TP_fast_assign( @@ -444,12 +460,21 @@ TRACE_EVENT(cxl_dram, __entry->column = get_unaligned_le16(rec->column); memcpy(__entry->cor_mask, &rec->correction_mask, CXL_EVENT_DER_CORRECTION_MASK_SIZE); + __entry->hpa = hpa; + if (cxlr) { + __assign_str(region_name, dev_name(&cxlr->dev)); + uuid_copy(&__entry->region_uuid, &cxlr->params.uuid); + } else { + __assign_str(region_name, ""); + uuid_copy(&__entry->region_uuid, &uuid_null); + } ), CXL_EVT_TP_printk("dpa=%llx dpa_flags='%s' descriptor='%s' type='%s' " \ "transaction_type='%s' channel=%u rank=%u nibble_mask=%x " \ "bank_group=%u bank=%u row=%u column=%u cor_mask=%s " \ - "validity_flags='%s'", + "validity_flags='%s' " \ + "hpa=%llx region=%s region_uuid=%pUb", __entry->dpa, show_dpa_flags(__entry->dpa_flags), show_event_desc_flags(__entry->descriptor), show_mem_event_type(__entry->type), @@ -458,7 +483,8 @@ TRACE_EVENT(cxl_dram, __entry->bank_group, __entry->bank, __entry->row, __entry->column, __print_hex(__entry->cor_mask, CXL_EVENT_DER_CORRECTION_MASK_SIZE), - show_dram_valid_flags(__entry->validity_flags) + show_dram_valid_flags(__entry->validity_flags), + __entry->hpa, __get_str(region_name), &__entry->region_uuid ) ); @@ -642,8 +668,6 @@ TRACE_EVENT(cxl_memory_module, #define cxl_poison_overflow(flags, time) \ (flags & CXL_POISON_FLAG_OVERFLOW ? le64_to_cpu(time) : 0) -u64 cxl_trace_hpa(struct cxl_region *cxlr, struct cxl_memdev *memdev, u64 dpa); - TRACE_EVENT(cxl_poison, TP_PROTO(struct cxl_memdev *cxlmd, struct cxl_region *cxlr, diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index 036d17db68e0..80f58b96dc1c 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -12,6 +12,8 @@ #include <linux/node.h> #include <linux/io.h> +extern const struct nvdimm_security_ops *cxl_security_ops; + /** * DOC: cxl objects * @@ -779,6 +781,11 @@ int cxl_decoder_add(struct cxl_decoder *cxld, int *target_map); struct cxl_endpoint_decoder *cxl_endpoint_decoder_alloc(struct cxl_port *port); int cxl_decoder_add_locked(struct cxl_decoder *cxld, int *target_map); int cxl_decoder_autoremove(struct device *host, struct cxl_decoder *cxld); +static inline int cxl_root_decoder_autoremove(struct device *host, + struct cxl_root_decoder *cxlrd) +{ + return cxl_decoder_autoremove(host, &cxlrd->cxlsd.cxld); +} int cxl_endpoint_autoremove(struct cxl_memdev *cxlmd, struct cxl_port *endpoint); /** diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index 36cee9c30ceb..19aba81cdf13 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -527,6 +527,9 @@ enum cxl_opcode { CXL_MBOX_OP_SET_TIMESTAMP = 0x0301, CXL_MBOX_OP_GET_SUPPORTED_LOGS = 0x0400, CXL_MBOX_OP_GET_LOG = 0x0401, + CXL_MBOX_OP_GET_LOG_CAPS = 0x0402, + CXL_MBOX_OP_CLEAR_LOG = 0x0403, + CXL_MBOX_OP_GET_SUP_LOG_SUBLIST = 0x0405, CXL_MBOX_OP_IDENTIFY = 0x4000, CXL_MBOX_OP_GET_PARTITION_INFO = 0x4100, CXL_MBOX_OP_SET_PARTITION_INFO = 0x4101, diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c index 2ff361e756d6..74876c9835e8 100644 --- a/drivers/cxl/pci.c +++ b/drivers/cxl/pci.c @@ -974,6 +974,75 @@ static struct pci_driver cxl_pci_driver = { }, }; -module_pci_driver(cxl_pci_driver); +#define CXL_EVENT_HDR_FLAGS_REC_SEVERITY GENMASK(1, 0) +static void cxl_handle_cper_event(enum cxl_event_type ev_type, + struct cxl_cper_event_rec *rec) +{ + struct cper_cxl_event_devid *device_id = &rec->hdr.device_id; + struct pci_dev *pdev __free(pci_dev_put) = NULL; + enum cxl_event_log_type log_type; + struct cxl_dev_state *cxlds; + unsigned int devfn; + u32 hdr_flags; + + pr_debug("CPER event %d for device %u:%u:%u.%u\n", ev_type, + device_id->segment_num, device_id->bus_num, + device_id->device_num, device_id->func_num); + + devfn = PCI_DEVFN(device_id->device_num, device_id->func_num); + pdev = pci_get_domain_bus_and_slot(device_id->segment_num, + device_id->bus_num, devfn); + if (!pdev) + return; + + guard(device)(&pdev->dev); + if (pdev->driver != &cxl_pci_driver) + return; + + cxlds = pci_get_drvdata(pdev); + if (!cxlds) + return; + + /* Fabricate a log type */ + hdr_flags = get_unaligned_le24(rec->event.generic.hdr.flags); + log_type = FIELD_GET(CXL_EVENT_HDR_FLAGS_REC_SEVERITY, hdr_flags); + + cxl_event_trace_record(cxlds->cxlmd, log_type, ev_type, + &uuid_null, &rec->event); +} + +static void cxl_cper_work_fn(struct work_struct *work) +{ + struct cxl_cper_work_data wd; + + while (cxl_cper_kfifo_get(&wd)) + cxl_handle_cper_event(wd.event_type, &wd.rec); +} +static DECLARE_WORK(cxl_cper_work, cxl_cper_work_fn); + +static int __init cxl_pci_driver_init(void) +{ + int rc; + + rc = pci_register_driver(&cxl_pci_driver); + if (rc) + return rc; + + rc = cxl_cper_register_work(&cxl_cper_work); + if (rc) + pci_unregister_driver(&cxl_pci_driver); + + return rc; +} + +static void __exit cxl_pci_driver_exit(void) +{ + cxl_cper_unregister_work(&cxl_cper_work); + cancel_work_sync(&cxl_cper_work); + pci_unregister_driver(&cxl_pci_driver); +} + +module_init(cxl_pci_driver_init); +module_exit(cxl_pci_driver_exit); MODULE_LICENSE("GPL v2"); MODULE_IMPORT_NS(CXL); diff --git a/drivers/cxl/pmem.c b/drivers/cxl/pmem.c index 7cb8994f8809..2ecdaee63021 100644 --- a/drivers/cxl/pmem.c +++ b/drivers/cxl/pmem.c @@ -11,8 +11,6 @@ #include "cxlmem.h" #include "cxl.h" -extern const struct nvdimm_security_ops *cxl_security_ops; - static __read_mostly DECLARE_BITMAP(exclusive_cmds, CXL_MEM_COMMAND_ID_MAX); static void clear_exclusive(void *mds) diff --git a/include/linux/cxl-event.h b/include/linux/cxl-event.h index 03fa6d50d46f..60b25020281f 100644 --- a/include/linux/cxl-event.h +++ b/include/linux/cxl-event.h @@ -3,6 +3,10 @@ #ifndef _LINUX_CXL_EVENT_H #define _LINUX_CXL_EVENT_H +#include <linux/types.h> +#include <linux/uuid.h> +#include <linux/workqueue_types.h> + /* * Common Event Record Format * CXL rev 3.0 section 8.2.9.2.1; Table 8-42 @@ -91,11 +95,21 @@ struct cxl_event_mem_module { u8 reserved[0x3d]; } __packed; +/* + * General Media or DRAM Event Common Fields + * - provides common access to phys_addr + */ +struct cxl_event_common { + struct cxl_event_record_hdr hdr; + __le64 phys_addr; +} __packed; + union cxl_event { struct cxl_event_generic generic; struct cxl_event_gen_media gen_media; struct cxl_event_dram dram; struct cxl_event_mem_module mem_module; + struct cxl_event_common common; } __packed; /* @@ -140,4 +154,29 @@ struct cxl_cper_event_rec { union cxl_event event; } __packed; +struct cxl_cper_work_data { + enum cxl_event_type event_type; + struct cxl_cper_event_rec rec; +}; + +#ifdef CONFIG_ACPI_APEI_GHES +int cxl_cper_register_work(struct work_struct *work); +int cxl_cper_unregister_work(struct work_struct *work); +int cxl_cper_kfifo_get(struct cxl_cper_work_data *wd); +#else +static inline int cxl_cper_register_work(struct work_struct *work) +{ + return 0; +} + +static inline int cxl_cper_unregister_work(struct work_struct *work) +{ + return 0; +} +static inline int cxl_cper_kfifo_get(struct cxl_cper_work_data *wd) +{ + return 0; +} +#endif + #endif /* _LINUX_CXL_EVENT_H */ diff --git a/include/uapi/linux/cxl_mem.h b/include/uapi/linux/cxl_mem.h index 42066f4eb890..c6c0fe27495d 100644 --- a/include/uapi/linux/cxl_mem.h +++ b/include/uapi/linux/cxl_mem.h @@ -47,6 +47,9 @@ ___DEPRECATED(SCAN_MEDIA, "Scan Media"), \ ___DEPRECATED(GET_SCAN_MEDIA, "Get Scan Media Results"), \ ___C(GET_TIMESTAMP, "Get Timestamp"), \ + ___C(GET_LOG_CAPS, "Get Log Capabilities"), \ + ___C(CLEAR_LOG, "Clear Log"), \ + ___C(GET_SUP_LOG_SUBLIST, "Get Supported Logs Sub-List"), \ ___C(MAX, "invalid / last command") #define ___C(a, b) CXL_MEM_COMMAND_ID_##a diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c index 35ee41e435ab..6584443144de 100644 --- a/tools/testing/cxl/test/mem.c +++ b/tools/testing/cxl/test/mem.c @@ -127,7 +127,7 @@ static struct { #define CXL_TEST_EVENT_CNT_MAX 15 /* Set a number of events to return at a time for simulation. */ -#define CXL_TEST_EVENT_CNT 3 +#define CXL_TEST_EVENT_RET_MAX 4 struct mock_event_log { u16 clear_idx; @@ -222,6 +222,12 @@ static void mes_add_event(struct mock_event_store *mes, log->nr_events++; } +/* + * Vary the number of events returned to simulate events occuring while the + * logs are being read. + */ +static int ret_limit = 0; + static int mock_get_event(struct device *dev, struct cxl_mbox_cmd *cmd) { struct cxl_get_event_payload *pl; @@ -233,14 +239,18 @@ static int mock_get_event(struct device *dev, struct cxl_mbox_cmd *cmd) if (cmd->size_in != sizeof(log_type)) return -EINVAL; - if (cmd->size_out < struct_size(pl, records, CXL_TEST_EVENT_CNT)) + ret_limit = (ret_limit + 1) % CXL_TEST_EVENT_RET_MAX; + if (!ret_limit) + ret_limit = 1; + + if (cmd->size_out < struct_size(pl, records, ret_limit)) return -EINVAL; log_type = *((u8 *)cmd->payload_in); if (log_type >= CXL_EVENT_TYPE_MAX) return -EINVAL; - memset(cmd->payload_out, 0, cmd->size_out); + memset(cmd->payload_out, 0, struct_size(pl, records, 0)); log = event_find_log(dev, log_type); if (!log || event_log_empty(log)) @@ -248,7 +258,7 @@ static int mock_get_event(struct device *dev, struct cxl_mbox_cmd *cmd) pl = cmd->payload_out; - for (i = 0; i < CXL_TEST_EVENT_CNT && !event_log_empty(log); i++) { + for (i = 0; i < ret_limit && !event_log_empty(log); i++) { memcpy(&pl->records[i], event_get_current(log), sizeof(pl->records[i])); pl->records[i].event.generic.hdr.handle = @@ -256,6 +266,7 @@ static int mock_get_event(struct device *dev, struct cxl_mbox_cmd *cmd) log->cur_idx++; } + cmd->size_out = struct_size(pl, records, i); pl->record_count = cpu_to_le16(i); if (!event_log_empty(log)) pl->flags |= CXL_GET_EVENT_FLAG_MORE_RECORDS; |