[RFC,v2,4/5] cxl: Add extended linear cache address alias emission for cxl events

Message ID	20241112221335.432583-5-dave.jiang@intel.com
State	New
Headers	show Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D029121A710; Tue, 12 Nov 2024 22:13:43 +0000 (UTC) From: Dave Jiang <dave.jiang@intel.com> To: linux-cxl@vger.kernel.org, linux-acpi@vger.kernel.org Cc: rafael@kernel.org, bp@alien8.de, dan.j.williams@intel.com, tony.luck@intel.com, dave@stgolabs.net, jonathan.cameron@huawei.com, alison.schofield@intel.com, ira.weiny@intel.com Subject: [RFC PATCH v2 4/5] cxl: Add extended linear cache address alias emission for cxl events Date: Tue, 12 Nov 2024 15:12:36 -0700 Message-ID: <20241112221335.432583-5-dave.jiang@intel.com> In-Reply-To: <20241112221335.432583-1-dave.jiang@intel.com> References: <20241112221335.432583-1-dave.jiang@intel.com> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	acpi/hmat / cxl: Add exclusive caching enumeration and RAS support \| expand [RFC,v2,0/6] acpi/hmat / cxl: Add exclusive caching enumeration and RAS support [RFC,v2,1/5] acpi: numa: Add support to enumerate and store extended linear address mode [RFC,v2,2/5] acpi/hmat / cxl: Add extended linear cache support for CXL [RFC,v2,3/5] acpi/hmat: Add helper functions to provide extended linear cache translation [RFC,v2,4/5] cxl: Add extended linear cache address alias emission for cxl events [RFC,v2,5/5] cxl: Add mce notifier to emit aliased address for extended linear cache

diff --git a/drivers/cxl/core/acpi.c b/drivers/cxl/core/acpi.c index f13b4dae6ac5..f74136320fc3 100644 --- a/drivers/cxl/core/acpi.c +++ b/drivers/cxl/core/acpi.c @@ -9,3 +9,13 @@ int cxl_acpi_get_extended_linear_cache_size(struct resource *backing_res, { return hmat_get_extended_linear_cache_size(backing_res, nid, size); } + +int cxl_acpi_extended_linear_cache_address_xlat(u64 *address, u64 alias, int nid) +{ + return hmat_extended_linear_cache_address_xlat(address, alias, nid); +} + +int cxl_acpi_extended_linear_cache_alias_xlat(u64 address, u64 *alias, int nid) +{ + return hmat_extended_linear_cache_alias_xlat(address, alias, nid); +} diff --git a/drivers/cxl/core/core.h b/drivers/cxl/core/core.h index c4dc9aefe25f..9b10039b0ca7 100644 --- a/drivers/cxl/core/core.h +++ b/drivers/cxl/core/core.h @@ -30,8 +30,13 @@ 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_dpa_to_hpa(struct cxl_region *cxlr, const struct cxl_memdev *cxlmd, u64 dpa); +int cxl_region_nid(struct cxl_region *cxlr); #else +static inline int cxl_region_nid(struct cxl_region *cxlr) +{ + return NUMA_NO_NODE; +} static inline u64 cxl_dpa_to_hpa(struct cxl_region *cxlr, const struct cxl_memdev *cxlmd, u64 dpa) { @@ -112,5 +117,7 @@ int cxl_port_get_switch_dport_bandwidth(struct cxl_port *port, int cxl_acpi_get_extended_linear_cache_size(struct resource *backing_res, int nid, resource_size_t *size); +int cxl_acpi_extended_linear_cache_address_xlat(u64 *address, u64 alias, int nid); +int cxl_acpi_extended_linear_cache_alias_xlat(u64 address, u64 *alias, int nid); #endif /* __CXL_CORE_H__ */ diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 5175138c4fb7..3fa9c658a253 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -856,6 +856,39 @@ int cxl_enumerate_cmds(struct cxl_memdev_state *mds) } EXPORT_SYMBOL_NS_GPL(cxl_enumerate_cmds, CXL); +static u64 cxlr_hpa_cache_alias(struct cxl_region *cxlr, u64 hpa) +{ + struct cxl_region_params *p = &cxlr->params; + u64 alias, address; + int nid, rc; + + if (!p->cache_size) + return ~0ULL; + + nid = cxl_region_nid(cxlr); + if (nid == NUMA_NO_NODE) + nid = 0; + + if (hpa >= p->res->start + p->cache_size) { + address = hpa - p->cache_size; + alias = hpa; + rc = cxl_acpi_extended_linear_cache_address_xlat(&address, + alias, nid); + if (rc) + return rc; + + return address; + } + + address = hpa; + alias = hpa + p->cache_size; + rc = cxl_acpi_extended_linear_cache_alias_xlat(address, &alias, nid); + if (rc) + return rc; + + return alias; +} + void cxl_event_trace_record(const struct cxl_memdev *cxlmd, enum cxl_event_log_type type, enum cxl_event_type event_type, @@ -871,7 +904,7 @@ void cxl_event_trace_record(const struct cxl_memdev *cxlmd, } if (trace_cxl_general_media_enabled() || trace_cxl_dram_enabled()) { - u64 dpa, hpa = ULLONG_MAX; + u64 dpa, hpa = ULLONG_MAX, hpa_alias; struct cxl_region *cxlr; /* @@ -887,11 +920,14 @@ void cxl_event_trace_record(const struct cxl_memdev *cxlmd, if (cxlr) hpa = cxl_dpa_to_hpa(cxlr, cxlmd, dpa); + hpa_alias = cxlr_hpa_cache_alias(cxlr, hpa); + if (event_type == CXL_CPER_EVENT_GEN_MEDIA) trace_cxl_general_media(cxlmd, type, cxlr, hpa, - &evt->gen_media); + hpa_alias, &evt->gen_media); else if (event_type == CXL_CPER_EVENT_DRAM) - trace_cxl_dram(cxlmd, type, cxlr, hpa, &evt->dram); + trace_cxl_dram(cxlmd, type, cxlr, hpa, hpa_alias, + &evt->dram); } } EXPORT_SYMBOL_NS_GPL(cxl_event_trace_record, CXL); diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index a37923c030a3..a7479b4aad8d 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -2405,6 +2405,18 @@ static bool cxl_region_update_coordinates(struct cxl_region *cxlr, int nid) return true; } +int cxl_region_nid(struct cxl_region *cxlr) +{ + struct cxl_region_params *p = &cxlr->params; + struct resource *res; + + guard(rwsem_read)(&cxl_region_rwsem); + res = p->res; + if (!res) + return NUMA_NO_NODE; + return phys_to_target_node(res->start); +} + static int cxl_region_perf_attrs_callback(struct notifier_block *nb, unsigned long action, void *arg) { diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h index 8672b42ee4d1..a63183e23ac8 100644 --- a/drivers/cxl/core/trace.h +++ b/drivers/cxl/core/trace.h @@ -316,9 +316,10 @@ 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_region *cxlr, u64 hpa, struct cxl_event_gen_media *rec), + struct cxl_region *cxlr, u64 hpa, u64 hpa_alias, + struct cxl_event_gen_media *rec), - TP_ARGS(cxlmd, log, cxlr, hpa, rec), + TP_ARGS(cxlmd, log, cxlr, hpa, hpa_alias, rec), TP_STRUCT__entry( CXL_EVT_TP_entry @@ -332,6 +333,7 @@ TRACE_EVENT(cxl_general_media, __array(u8, comp_id, CXL_EVENT_GEN_MED_COMP_ID_SIZE) /* Following are out of order to pack trace record */ __field(u64, hpa) + __field(u64, hpa_alias) __field_struct(uuid_t, region_uuid) __field(u16, validity_flags) __field(u8, rank) @@ -358,6 +360,7 @@ TRACE_EVENT(cxl_general_media, CXL_EVENT_GEN_MED_COMP_ID_SIZE); __entry->validity_flags = get_unaligned_le16(&rec->media_hdr.validity_flags); __entry->hpa = hpa; + __entry->hpa_alias = hpa_alias; if (cxlr) { __assign_str(region_name); uuid_copy(&__entry->region_uuid, &cxlr->params.uuid); @@ -370,7 +373,7 @@ TRACE_EVENT(cxl_general_media, 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' " \ - "hpa=%llx region=%s region_uuid=%pUb", + "hpa=%llx hpa_alias=%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), @@ -378,7 +381,8 @@ TRACE_EVENT(cxl_general_media, __entry->channel, __entry->rank, __entry->device, __print_hex(__entry->comp_id, CXL_EVENT_GEN_MED_COMP_ID_SIZE), show_valid_flags(__entry->validity_flags), - __entry->hpa, __get_str(region_name), &__entry->region_uuid + __entry->hpa, __entry->hpa_alias, __get_str(region_name), + &__entry->region_uuid ) ); @@ -413,9 +417,10 @@ TRACE_EVENT(cxl_general_media, TRACE_EVENT(cxl_dram, TP_PROTO(const struct cxl_memdev *cxlmd, enum cxl_event_log_type log, - struct cxl_region *cxlr, u64 hpa, struct cxl_event_dram *rec), + struct cxl_region *cxlr, u64 hpa, u64 hpa_alias, + struct cxl_event_dram *rec), - TP_ARGS(cxlmd, log, cxlr, hpa, rec), + TP_ARGS(cxlmd, log, cxlr, hpa, hpa_alias, rec), TP_STRUCT__entry( CXL_EVT_TP_entry @@ -431,6 +436,7 @@ TRACE_EVENT(cxl_dram, __field(u32, row) __array(u8, cor_mask, CXL_EVENT_DER_CORRECTION_MASK_SIZE) __field(u64, hpa) + __field(u64, hpa_alias) __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 */ @@ -461,6 +467,7 @@ TRACE_EVENT(cxl_dram, memcpy(__entry->cor_mask, &rec->correction_mask, CXL_EVENT_DER_CORRECTION_MASK_SIZE); __entry->hpa = hpa; + __entry->hpa_alias = hpa_alias; if (cxlr) { __assign_str(region_name); uuid_copy(&__entry->region_uuid, &cxlr->params.uuid); @@ -474,7 +481,7 @@ TRACE_EVENT(cxl_dram, "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' " \ - "hpa=%llx region=%s region_uuid=%pUb", + "hpa=%llx hpa_alias=%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), @@ -484,7 +491,8 @@ TRACE_EVENT(cxl_dram, __entry->row, __entry->column, __print_hex(__entry->cor_mask, CXL_EVENT_DER_CORRECTION_MASK_SIZE), show_dram_valid_flags(__entry->validity_flags), - __entry->hpa, __get_str(region_name), &__entry->region_uuid + __entry->hpa_alias, __entry->hpa, __get_str(region_name), + &__entry->region_uuid ) ); diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 18a94d382d40..cdf6d42f5a94 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -436,34 +436,12 @@ int thermal_acpi_critical_trip_temp(struct acpi_device *adev, int *ret_temp); #ifdef CONFIG_ACPI_HMAT int acpi_get_genport_coordinates(u32 uid, struct access_coordinate *coord); -int hmat_get_extended_linear_cache_size(struct resource *backing_res, int nid, - resource_size_t *size); -int hmat_extended_linear_cache_alias_xlat(u64 address, u64 *alias, int nid); -int hmat_extended_linear_cache_address_xlat(u64 *address, u64 alias, int nid); #else static inline int acpi_get_genport_coordinates(u32 uid, struct access_coordinate *coord) { return -EOPNOTSUPP; } - -static inline int hmat_get_extended_linear_cache_size(struct resource *backing_res, - int nid, resource_size_t *size) -{ - return -EOPNOTSUPP; -} - -static inline int hmat_extended_linear_cache_alias_xlat(u64 address, - u64 *alias, int nid) -{ - return -EOPNOTSUPP; -} - -static inline int hmat_extended_linear_cache_address_xlat(u64 *address, - u64 alias, int nid) -{ - return -EOPNOTSUPP; -} #endif #ifdef CONFIG_ACPI_NUMA @@ -1115,12 +1093,26 @@ static inline acpi_handle acpi_get_processor_handle(int cpu) #ifdef CONFIG_ACPI_HMAT int hmat_get_extended_linear_cache_size(struct resource *backing_res, int nid, resource_size_t *size); +int hmat_extended_linear_cache_alias_xlat(u64 address, u64 *alias, int nid); +int hmat_extended_linear_cache_address_xlat(u64 *address, u64 alias, int nid); #else static inline int hmat_get_extended_linear_cache_size(struct resource *backing_res, int nid, resource_size_t *size) { return -EOPNOTSUPP; } + +static inline int hmat_extended_linear_cache_alias_xlat(u64 address, + u64 *alias, int nid) +{ + return -EOPNOTSUPP; +} + +static inline int hmat_extended_linear_cache_address_xlat(u64 *address, + u64 alias, int nid) +{ + return -EOPNOTSUPP; +} #endif extern void arch_post_acpi_subsys_init(void);

[RFC,v2,4/5] cxl: Add extended linear cache address alias emission for cxl events

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Patch