[PATCH RESEND v2 1/3] acpi/ghes: Extend acpi_ghes_memory_errors() to support multiple CPERs

[Gavin Shan <gshan@redhat.com>]

In the situation where host and guest has 64KB and 4KB page sizes, one
error on the host's page affects 16 guest's pages. we need to send 16
consective errors in this specific case.

Extend acpi_ghes_memory_errors() to support multiple CPERs after the
hunk of code to generate the GHES error status is pulled out from
ghes_gen_err_data_uncorrectable_recoverable().

No functional changes intended.

Signed-off-by: Gavin Shan <gshan@redhat.com>
---
 hw/acpi/ghes-stub.c    |  2 +-
 hw/acpi/ghes.c         | 27 ++++++++++++++-------------
 include/hw/acpi/ghes.h |  2 +-
 target/arm/kvm.c       |  7 ++++++-
 4 files changed, 22 insertions(+), 16 deletions(-)

diff --git a/hw/acpi/ghes-stub.c b/hw/acpi/ghes-stub.c
index 40f660c246..c1f8c9bec9 100644
--- a/hw/acpi/ghes-stub.c
+++ b/hw/acpi/ghes-stub.c
@@ -12,7 +12,7 @@
 #include "hw/acpi/ghes.h"
 
 int acpi_ghes_memory_errors(AcpiGhesState *ags, uint16_t source_id,
-                            uint64_t physical_address)
+                            GArray *addresses)
 {
     return -1;
 }
diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index 06555905ce..045b77715f 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -214,18 +214,13 @@ static void acpi_ghes_build_append_mem_cper(GArray *table,
 
 static void
 ghes_gen_err_data_uncorrectable_recoverable(GArray *block,
-                                            const uint8_t *section_type,
-                                            int data_length)
+                                            const uint8_t *section_type)
 {
     /* invalid fru id: ACPI 4.0: 17.3.2.6.1 Generic Error Data,
      * Table 17-13 Generic Error Data Entry
      */
     QemuUUID fru_id = {};
 
-    /* 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, section_type,
         ACPI_CPER_SEV_RECOVERABLE, 0, 0,
@@ -557,19 +552,20 @@ void ghes_record_cper_errors(AcpiGhesState *ags, const void *cper, size_t len,
 }
 
 int acpi_ghes_memory_errors(AcpiGhesState *ags, uint16_t source_id,
-                            uint64_t physical_address)
+                            GArray *addresses)
 {
     /* Memory Error Section Type */
     const uint8_t guid[] =
           UUID_LE(0xA5BC1114, 0x6F64, 0x4EDE, 0xB8, 0x63, 0x3E, 0x83, \
                   0xED, 0x7C, 0x83, 0xB1);
     Error *errp = NULL;
-    int data_length;
+    int data_length, i;
     GArray *block;
 
     block = g_array_new(false, true /* clear */, 1);
 
-    data_length = ACPI_GHES_DATA_LENGTH + ACPI_GHES_MEM_CPER_LENGTH;
+    data_length = addresses->len *
+                  (ACPI_GHES_DATA_LENGTH + ACPI_GHES_MEM_CPER_LENGTH);
     /*
      * It should not run out of the preallocated memory if adding a new generic
      * error data entry
@@ -577,10 +573,15 @@ int acpi_ghes_memory_errors(AcpiGhesState *ags, uint16_t source_id,
     assert((data_length + ACPI_GHES_GESB_SIZE) <=
             ACPI_GHES_MAX_RAW_DATA_LENGTH);
 
-    ghes_gen_err_data_uncorrectable_recoverable(block, guid, data_length);
-
-    /* Build the memory section CPER for above new generic error data entry */
-    acpi_ghes_build_append_mem_cper(block, physical_address);
+    /* 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);
+    for (i = 0; i < addresses->len; i++) {
+        ghes_gen_err_data_uncorrectable_recoverable(block, guid);
+        /* Memory section CPER on top of the generic error data entry */
+        acpi_ghes_build_append_mem_cper(block,
+                                        g_array_index(addresses, uint64_t, i));
+    }
 
     /* Report the error */
     ghes_record_cper_errors(ags, block->data, block->len, source_id, &errp);
diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index df2ecbf6e4..a8cbc520d5 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -99,7 +99,7 @@ void acpi_build_hest(AcpiGhesState *ags, GArray *table_data,
 void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
                           GArray *hardware_errors);
 int acpi_ghes_memory_errors(AcpiGhesState *ags, uint16_t source_id,
-                            uint64_t error_physical_addr);
+                            GArray *addresses);
 void ghes_record_cper_errors(AcpiGhesState *ags, const void *cper, size_t len,
                              uint16_t source_id, Error **errp);
 
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index 4f769d69b3..9a47ac9e3a 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -2434,6 +2434,7 @@ void kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr)
     ram_addr_t ram_addr;
     hwaddr paddr;
     AcpiGhesState *ags;
+    GArray *addresses;
 
     assert(code == BUS_MCEERR_AR || code == BUS_MCEERR_AO);
 
@@ -2442,6 +2443,7 @@ void kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr)
         ram_addr = qemu_ram_addr_from_host(addr);
         if (ram_addr != RAM_ADDR_INVALID &&
             kvm_physical_memory_addr_from_host(c->kvm_state, addr, &paddr)) {
+            addresses = g_array_new(false, false, sizeof(paddr));
             kvm_hwpoison_page_add(ram_addr);
             /*
              * If this is a BUS_MCEERR_AR, we know we have been called
@@ -2454,16 +2456,19 @@ void kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr)
              * later from the main thread, so doing the injection of
              * the error would be more complicated.
              */
+            g_array_append_vals(addresses, &paddr, 1);
             if (code == BUS_MCEERR_AR) {
                 kvm_cpu_synchronize_state(c);
                 if (!acpi_ghes_memory_errors(ags, ACPI_HEST_SRC_ID_SYNC,
-                                             paddr)) {
+                                             addresses)) {
                     kvm_inject_arm_sea(c);
                 } else {
                     error_report("failed to record the error");
                     abort();
                 }
             }
+
+            g_array_free(addresses, true);
             return;
         }
         if (code == BUS_MCEERR_AO) {
-- 
2.51.0