diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index 4e34b16a6ca9..c88717fb1bef 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -251,17 +251,18 @@ static int acpi_ghes_record_mem_error(uint64_t error_block_address,
  * Initialize "etc/hardware_errors" and "etc/hardware_errors_addr" fw_cfg blobs.
  * See docs/specs/acpi_hest_ghes.rst for blobs format.
  */
-static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
+static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker,
+                                   int num_sources)
 {
     int i, error_status_block_offset;
 
     /* Build error_block_address */
-    for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+    for (i = 0; i < num_sources; i++) {
         build_append_int_noprefix(hardware_errors, 0, sizeof(uint64_t));
     }
 
     /* Build read_ack_register */
-    for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+    for (i = 0; i < num_sources; i++) {
         /*
          * Initialize the value of read_ack_register to 1, so GHES can be
          * writable after (re)boot.
@@ -276,13 +277,13 @@ static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
 
     /* Reserve space for Error Status Data Block */
     acpi_data_push(hardware_errors,
-        ACPI_GHES_MAX_RAW_DATA_LENGTH * ACPI_GHES_ERROR_SOURCE_COUNT);
+        ACPI_GHES_MAX_RAW_DATA_LENGTH * num_sources);
 
     /* Tell guest firmware to place hardware_errors blob into RAM */
     bios_linker_loader_alloc(linker, ACPI_GHES_ERRORS_FW_CFG_FILE,
                              hardware_errors, sizeof(uint64_t), false);
 
-    for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+    for (i = 0; i < num_sources; i++) {
         /*
          * Tell firmware to patch error_block_address entries to point to
          * corresponding "Generic Error Status Block"
@@ -304,10 +305,12 @@ static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
 /* Build Generic Hardware Error Source version 2 (GHESv2) */
 static void build_ghes_v2(GArray *table_data,
                           BIOSLinker *linker,
-                          enum AcpiGhesNotifyType notify,
-                          uint16_t source_id)
+                          const AcpiNotificationSourceId *notif_src,
+                          uint16_t index, int num_sources)
 {
     uint64_t address_offset;
+    const uint16_t notify = notif_src->notify;
+    const uint16_t source_id = notif_src->source_id;
 
     /*
      * Type:
@@ -336,7 +339,7 @@ static void build_ghes_v2(GArray *table_data,
                      4 /* QWord access */, 0);
     bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
         address_offset + GAS_ADDR_OFFSET, sizeof(uint64_t),
-        ACPI_GHES_ERRORS_FW_CFG_FILE, source_id * sizeof(uint64_t));
+        ACPI_GHES_ERRORS_FW_CFG_FILE, index * sizeof(uint64_t));
 
     /* Notification Structure */
     build_ghes_hw_error_notification(table_data, notify);
@@ -353,9 +356,10 @@ static void build_ghes_v2(GArray *table_data,
     build_append_gas(table_data, AML_AS_SYSTEM_MEMORY, 0x40, 0,
                      4 /* QWord access */, 0);
     bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
-        address_offset + GAS_ADDR_OFFSET,
-        sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE,
-        (ACPI_GHES_ERROR_SOURCE_COUNT + source_id) * sizeof(uint64_t));
+                                   address_offset + GAS_ADDR_OFFSET,
+                                   sizeof(uint64_t),
+                                   ACPI_GHES_ERRORS_FW_CFG_FILE,
+                                   (num_sources + index) * sizeof(uint64_t));
 
     /*
      * Read Ack Preserve field
@@ -370,12 +374,15 @@ static void build_ghes_v2(GArray *table_data,
 /* Build Hardware Error Source Table */
 void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
                      BIOSLinker *linker,
+                     const AcpiNotificationSourceId * const notif_source,
+                     int num_sources,
                      const char *oem_id, const char *oem_table_id)
 {
     AcpiTable table = { .sig = "HEST", .rev = 1,
                         .oem_id = oem_id, .oem_table_id = oem_table_id };
+    int i;
 
-    build_ghes_error_table(hardware_errors, linker);
+    build_ghes_error_table(hardware_errors, linker, num_sources);
 
     acpi_table_begin(&table, table_data);
 
@@ -383,9 +390,10 @@ void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
     int hest_offset = table_data->len;
 
     /* Error Source Count */
-    build_append_int_noprefix(table_data, ACPI_GHES_ERROR_SOURCE_COUNT, 4);
-    build_ghes_v2(table_data, linker,
-                  ACPI_GHES_NOTIFY_SEA, ACPI_HEST_SRC_ID_SEA);
+    build_append_int_noprefix(table_data, num_sources, 4);
+    for (i = 0; i < num_sources; i++) {
+        build_ghes_v2(table_data, linker, &notif_source[i], i, num_sources);
+    }
 
     acpi_table_end(linker, &table);
 
@@ -421,13 +429,11 @@ int acpi_ghes_record_errors(int source_id, uint64_t physical_address)
     uint64_t hest_read_ack_start_addr, read_ack_start_addr;
     uint64_t hest_addr, cper_addr, err_source_struct;
     uint64_t hest_err_block_addr, error_block_addr;
-    uint32_t i, ret;
+    uint32_t num_sources, i, ret;
     AcpiGedState *acpi_ged_state;
     AcpiGhesState *ags;
     uint64_t read_ack;
 
-    assert(source_id < ACPI_GHES_ERROR_SOURCE_COUNT);
-
     acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
                                                        NULL));
     g_assert(acpi_ged_state);
@@ -435,16 +441,18 @@ int acpi_ghes_record_errors(int source_id, uint64_t physical_address)
 
     hest_addr = le64_to_cpu(ags->hest_addr_le);
 
+    cpu_physical_memory_read(hest_addr, &num_sources, sizeof(num_sources));
     if (!physical_address) {
         return -1;
     }
 
-    err_source_struct = hest_addr + ACPI_GHES_ERROR_SOURCE_COUNT;
+    err_source_struct = hest_addr + sizeof(num_sources);
 
     /*
      * Currently, HEST Error source navigates only for GHESv2 tables
      */
-    for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+
+    for (i = 0; i < num_sources; i++) {
         uint64_t addr = err_source_struct;
         uint16_t type, src_id;
 
@@ -463,9 +471,8 @@ int acpi_ghes_record_errors(int source_id, uint64_t physical_address)
 
         err_source_struct += HEST_GHES_V2_TABLE_SIZE;
     }
-    if (i == ACPI_GHES_ERROR_SOURCE_COUNT) {
-        error_report("can not find Generic Error Status Block");
-
+    if (i == num_sources) {
+        error_report("HEST: Source %d not found.", source_id);
         return -1;
     }
 
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index bafd9a56c217..476c365851c4 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -890,6 +890,10 @@ static void acpi_align_size(GArray *blob, unsigned align)
     g_array_set_size(blob, ROUND_UP(acpi_data_len(blob), align));
 }
 
+static const AcpiNotificationSourceId hest_ghes_notify[] = {
+    {ACPI_HEST_SRC_ID_SYNC, ACPI_GHES_NOTIFY_SEA},
+};
+
 static
 void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
 {
@@ -945,6 +949,7 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
     if (vms->ras) {
         acpi_add_table(table_offsets, tables_blob);
         acpi_build_hest(tables_blob, tables->hardware_errors, tables->linker,
+                        hest_ghes_notify, ARRAY_SIZE(hest_ghes_notify),
                         vms->oem_id, vms->oem_table_id);
     }
 
diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index 6471934d7775..344919f1f75c 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -57,21 +57,28 @@ enum AcpiGhesNotifyType {
     ACPI_GHES_NOTIFY_RESERVED = 12
 };
 
-enum {
-    ACPI_HEST_SRC_ID_SEA = 0,
-    /* future ids go here */
-
-    ACPI_GHES_ERROR_SOURCE_COUNT
-};
-
 typedef struct AcpiGhesState {
     uint64_t hest_addr_le;
     uint64_t ghes_addr_le;
     bool present; /* True if GHES is present at all on this board */
 } AcpiGhesState;
 
+/*
+ * ID numbers used to fill HEST source ID field
+ */
+enum AcpiGhesSourceID {
+    ACPI_HEST_SRC_ID_SYNC,
+};
+
+typedef struct AcpiNotificationSourceId {
+    enum AcpiGhesSourceID source_id;
+    enum AcpiGhesNotifyType notify;
+} AcpiNotificationSourceId;
+
 void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
                      BIOSLinker *linker,
+                     const AcpiNotificationSourceId * const notif_source,
+                     int num_sources,
                      const char *oem_id, const char *oem_table_id);
 void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
                           GArray *hardware_errors);
