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Tue, 5 May 2020 10:44:48 +0000 (UTC) Date: Tue, 5 May 2020 12:44:46 +0200 From: Igor Mammedov To: Dongjiu Geng Subject: Re: [PATCH v25 08/10] ACPI: Record Generic Error Status Block(GESB) table Message-ID: <20200505124446.2972f407@redhat.com> In-Reply-To: <20200410114639.32844-9-gengdongjiu@huawei.com> References: <20200410114639.32844-1-gengdongjiu@huawei.com> <20200410114639.32844-9-gengdongjiu@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Received-SPF: pass client-ip=205.139.110.120; envelope-from=imammedo@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/05 03:48:16 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fam@euphon.net, peter.maydell@linaro.org, xiaoguangrong.eric@gmail.com, kvm@vger.kernel.org, mst@redhat.com, mtosatti@redhat.com, qemu-devel@nongnu.org, ehabkost@redhat.com, linuxarm@huawei.com, shannon.zhaosl@gmail.com, zhengxiang9@huawei.com, qemu-arm@nongnu.org, Jonathan.Cameron@huawei.com, pbonzini@redhat.com, rth@twiddle.net Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Fri, 10 Apr 2020 19:46:37 +0800 Dongjiu Geng wrote: > kvm_arch_on_sigbus_vcpu() error injection uses source_id as > index in etc/hardware_errors to find out Error Status Data > Block entry corresponding to error source. So supported source_id > values should be assigned here and not be changed afterwards to > make sure that guest will write error into expected Error Status > Data Block. > > Before QEMU writes a new error to ACPI table, it will check whether > previous error has been acknowledged. If not acknowledged, the new > errors will be ignored and not be recorded. For the errors section > type, QEMU simulate it to memory section error. > > Signed-off-by: Dongjiu Geng > Signed-off-by: Xiang Zheng Reviewed-by: Igor Mammedov Also we should ratelimit error messages that could be triggered at runtime from acpi_ghes_record_errors() and functions it's calling. It could be a patch on top. > --- > change since v24: > 1. Using g_array_append_vals() to replace build_append_int_noprefix() to build FRU Text. > 2. Remove the judgement that judge whether acpi_ged_state is NULL. > 3. Add le64_to_cpu() to error_block_address > --- > hw/acpi/ghes.c | 219 +++++++++++++++++++++++++++++++++++++++++++++++++ > include/hw/acpi/ghes.h | 1 + > 2 files changed, 220 insertions(+) > > diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c > index e74af23..a3ab2e4 100644 > --- a/hw/acpi/ghes.c > +++ b/hw/acpi/ghes.c > @@ -26,6 +26,7 @@ > #include "qemu/error-report.h" > #include "hw/acpi/generic_event_device.h" > #include "hw/nvram/fw_cfg.h" > +#include "qemu/uuid.h" > > #define ACPI_GHES_ERRORS_FW_CFG_FILE "etc/hardware_errors" > #define ACPI_GHES_DATA_ADDR_FW_CFG_FILE "etc/hardware_errors_addr" > @@ -43,6 +44,36 @@ > #define GAS_ADDR_OFFSET 4 > > /* > + * The total size of Generic Error Data Entry > + * ACPI 6.1/6.2: 18.3.2.7.1 Generic Error Data, > + * Table 18-343 Generic Error Data Entry > + */ > +#define ACPI_GHES_DATA_LENGTH 72 > + > +/* The memory section CPER size, UEFI 2.6: N.2.5 Memory Error Section */ > +#define ACPI_GHES_MEM_CPER_LENGTH 80 > + > +/* Masks for block_status flags */ > +#define ACPI_GEBS_UNCORRECTABLE 1 > + > +/* > + * Total size for Generic Error Status Block except Generic Error Data Entries > + * ACPI 6.2: 18.3.2.7.1 Generic Error Data, > + * Table 18-380 Generic Error Status Block > + */ > +#define ACPI_GHES_GESB_SIZE 20 > + > +/* > + * Values for error_severity field > + */ > +enum AcpiGenericErrorSeverity { > + ACPI_CPER_SEV_RECOVERABLE = 0, > + ACPI_CPER_SEV_FATAL = 1, > + ACPI_CPER_SEV_CORRECTED = 2, > + ACPI_CPER_SEV_NONE = 3, > +}; > + > +/* > * Hardware Error Notification > * ACPI 4.0: 17.3.2.7 Hardware Error Notification > * Composes dummy Hardware Error Notification descriptor of specified type > @@ -73,6 +104,138 @@ static void build_ghes_hw_error_notification(GArray *table, const uint8_t type) > } > > /* > + * Generic Error Data Entry > + * ACPI 6.1: 18.3.2.7.1 Generic Error Data > + */ > +static void acpi_ghes_generic_error_data(GArray *table, > + const uint8_t *section_type, uint32_t error_severity, > + uint8_t validation_bits, uint8_t flags, > + uint32_t error_data_length, QemuUUID fru_id, > + uint64_t time_stamp) > +{ > + const uint8_t fru_text[20] = {0}; > + > + /* Section Type */ > + g_array_append_vals(table, section_type, 16); > + > + /* Error Severity */ > + build_append_int_noprefix(table, error_severity, 4); > + /* Revision */ > + build_append_int_noprefix(table, 0x300, 2); > + /* Validation Bits */ > + build_append_int_noprefix(table, validation_bits, 1); > + /* Flags */ > + build_append_int_noprefix(table, flags, 1); > + /* Error Data Length */ > + build_append_int_noprefix(table, error_data_length, 4); > + > + /* FRU Id */ > + g_array_append_vals(table, fru_id.data, ARRAY_SIZE(fru_id.data)); > + > + /* FRU Text */ > + g_array_append_vals(table, fru_text, sizeof(fru_text)); > + > + /* Timestamp */ > + build_append_int_noprefix(table, time_stamp, 8); > +} > + > +/* > + * Generic Error Status Block > + * ACPI 6.1: 18.3.2.7.1 Generic Error Data > + */ > +static void acpi_ghes_generic_error_status(GArray *table, uint32_t block_status, > + uint32_t raw_data_offset, uint32_t raw_data_length, > + uint32_t data_length, uint32_t error_severity) > +{ > + /* Block Status */ > + build_append_int_noprefix(table, block_status, 4); > + /* Raw Data Offset */ > + build_append_int_noprefix(table, raw_data_offset, 4); > + /* Raw Data Length */ > + build_append_int_noprefix(table, raw_data_length, 4); > + /* Data Length */ > + build_append_int_noprefix(table, data_length, 4); > + /* Error Severity */ > + build_append_int_noprefix(table, error_severity, 4); > +} > + > +/* UEFI 2.6: N.2.5 Memory Error Section */ > +static void acpi_ghes_build_append_mem_cper(GArray *table, > + uint64_t error_physical_addr) > +{ > + /* > + * Memory Error Record > + */ > + > + /* Validation Bits */ > + build_append_int_noprefix(table, > + (1ULL << 14) | /* Type Valid */ > + (1ULL << 1) /* Physical Address Valid */, > + 8); > + /* Error Status */ > + build_append_int_noprefix(table, 0, 8); > + /* Physical Address */ > + build_append_int_noprefix(table, error_physical_addr, 8); > + /* Skip all the detailed information normally found in such a record */ > + build_append_int_noprefix(table, 0, 48); > + /* Memory Error Type */ > + build_append_int_noprefix(table, 0 /* Unknown error */, 1); > + /* Skip all the detailed information normally found in such a record */ > + build_append_int_noprefix(table, 0, 7); > +} > + > +static int acpi_ghes_record_mem_error(uint64_t error_block_address, > + uint64_t error_physical_addr) > +{ > + GArray *block; > + > + /* Memory Error Section Type */ > + const uint8_t uefi_cper_mem_sec[] = > + UUID_LE(0xA5BC1114, 0x6F64, 0x4EDE, 0xB8, 0x63, 0x3E, 0x83, \ > + 0xED, 0x7C, 0x83, 0xB1); > + > + /* invalid fru id: ACPI 4.0: 17.3.2.6.1 Generic Error Data, > + * Table 17-13 Generic Error Data Entry > + */ > + QemuUUID fru_id = {}; > + uint32_t data_length; > + > + block = g_array_new(false, true /* clear */, 1); > + > + /* This is the length if adding a new generic error data entry*/ > + data_length = ACPI_GHES_DATA_LENGTH + ACPI_GHES_MEM_CPER_LENGTH; > + > + /* > + * Check whether it will run out of the preallocated memory if adding a new > + * generic error data entry > + */ > + if ((data_length + ACPI_GHES_GESB_SIZE) > ACPI_GHES_MAX_RAW_DATA_LENGTH) { > + error_report("Not enough memory to record new CPER!!!"); > + g_array_free(block, true); > + return -1; > + } > + > + /* Build the new generic error status block header */ > + acpi_ghes_generic_error_status(block, ACPI_GEBS_UNCORRECTABLE, > + 0, 0, data_length, ACPI_CPER_SEV_RECOVERABLE); > + > + /* Build this new generic error data entry header */ > + acpi_ghes_generic_error_data(block, uefi_cper_mem_sec, > + ACPI_CPER_SEV_RECOVERABLE, 0, 0, > + ACPI_GHES_MEM_CPER_LENGTH, fru_id, 0); > + > + /* Build the memory section CPER for above new generic error data entry */ > + acpi_ghes_build_append_mem_cper(block, error_physical_addr); > + > + /* Write the generic error data entry into guest memory */ > + cpu_physical_memory_write(error_block_address, block->data, block->len); > + > + g_array_free(block, true); > + > + return 0; > +} > + > +/* > * Build table for the hardware error fw_cfg blob. > * Initialize "etc/hardware_errors" and "etc/hardware_errors_addr" fw_cfg blobs. > * See docs/specs/acpi_hest_ghes.rst for blobs format. > @@ -227,3 +390,59 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s, > fw_cfg_add_file_callback(s, ACPI_GHES_DATA_ADDR_FW_CFG_FILE, NULL, NULL, > NULL, &(ags->ghes_addr_le), sizeof(ags->ghes_addr_le), false); > } > > +int acpi_ghes_record_errors(uint8_t source_id, uint64_t physical_address) > +{ > + uint64_t error_block_addr, read_ack_register_addr, read_ack_register = 0; > + uint64_t start_addr; > + bool ret = -1; > + AcpiGedState *acpi_ged_state; > + AcpiGhesState *ags; > + > + assert(source_id < ACPI_HEST_SRC_ID_RESERVED); > + > + acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED, > + NULL)); > + g_assert(acpi_ged_state); > + ags = &acpi_ged_state->ghes_state; > + > + start_addr = le64_to_cpu(ags->ghes_addr_le); > + > + if (physical_address) { > + > + if (source_id < ACPI_HEST_SRC_ID_RESERVED) { > + start_addr += source_id * sizeof(uint64_t); > + } > + > + cpu_physical_memory_read(start_addr, &error_block_addr, > + sizeof(error_block_addr)); > + > + error_block_addr = le64_to_cpu(error_block_addr); > + > + read_ack_register_addr = start_addr + > + ACPI_GHES_ERROR_SOURCE_COUNT * sizeof(uint64_t); > + > + cpu_physical_memory_read(read_ack_register_addr, > + &read_ack_register, sizeof(read_ack_register)); > + > + /* zero means OSPM does not acknowledge the error */ > + if (!read_ack_register) { > + error_report("OSPM does not acknowledge previous error," > + " so can not record CPER for current error anymore"); > + } else if (error_block_addr) { > + read_ack_register = cpu_to_le64(0); > + /* > + * Clear the Read Ack Register, OSPM will write it to 1 when > + * it acknowledges this error. > + */ > + cpu_physical_memory_write(read_ack_register_addr, > + &read_ack_register, sizeof(uint64_t)); > + > + ret = acpi_ghes_record_mem_error(error_block_addr, > + physical_address); > + } else > + error_report("can not find Generic Error Status Block"); > + } > + > + return ret; > +} > diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h > index a3420fc..4ad025e 100644 > --- a/include/hw/acpi/ghes.h > +++ b/include/hw/acpi/ghes.h > @@ -70,4 +70,5 @@ void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker); > void acpi_build_hest(GArray *table_data, BIOSLinker *linker); > void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s, > GArray *hardware_errors); > +int acpi_ghes_record_errors(uint8_t notify, uint64_t error_physical_addr); > #endif