acpi: x86: set enabled when composing _MAT entries

Instead of composing disabled _MAT entry and then later on
patching it to enabled for hotpluggbale CPUs in DSDT,
set it to enabled at the time _MAT entry is built.

It will allow to drop usage of packed structures in
following patches when build_madt() is switched to use
build_append_int_noprefix() API.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-24-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/acpi/acpi-x86-stub.c

@@ -3,7 +3,8 @@
 #include "hw/i386/acpi-build.h"
 
 void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
-                       const CPUArchIdList *apic_ids, GArray *entry)
+                       const CPUArchIdList *apic_ids, GArray *entry,
+                       bool force_enabled)
 {
 }
 

hw/acpi/cpu.c

@@ -669,21 +669,8 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
 
             /* build _MAT object */
             assert(adevc && adevc->madt_cpu);
-            adevc->madt_cpu(adev, i, arch_ids, madt_buf);
+            adevc->madt_cpu(adev, i, arch_ids, madt_buf,
-            switch (madt_buf->data[0]) {
+                            true); /* set enabled flag */
-            case ACPI_APIC_PROCESSOR: {
-                AcpiMadtProcessorApic *apic = (void *)madt_buf->data;
-                apic->flags = cpu_to_le32(1);
-                break;
-            }
-            case ACPI_APIC_LOCAL_X2APIC: {
-                AcpiMadtProcessorX2Apic *apic = (void *)madt_buf->data;
-                apic->flags = cpu_to_le32(1);
-                break;
-            }
-            default:
-                assert(0);
-            }
             aml_append(dev, aml_name_decl("_MAT",
                 aml_buffer(madt_buf->len, (uint8_t *)madt_buf->data)));
             g_array_free(madt_buf, true);

hw/i386/acpi-common.c

@@ -34,9 +34,11 @@
 #include "acpi-common.h"
 
 void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
-                       const CPUArchIdList *apic_ids, GArray *entry)
+                       const CPUArchIdList *apic_ids, GArray *entry,
+                       bool force_enabled)
 {
     uint32_t apic_id = apic_ids->cpus[uid].arch_id;
+    uint32_t flags = apic_ids->cpus[uid].cpu != NULL || force_enabled ? 1 : 0;
 
     /* ACPI spec says that LAPIC entry for non present
      * CPU may be omitted from MADT or it must be marked
@@ -51,11 +53,7 @@ void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
         apic->length = sizeof(*apic);
         apic->processor_id = uid;
         apic->local_apic_id = apic_id;
-        if (apic_ids->cpus[uid].cpu != NULL) {
+        apic->flags = cpu_to_le32(flags);
-            apic->flags = cpu_to_le32(1);
-        } else {
-            apic->flags = cpu_to_le32(0);
-        }
     } else {
         AcpiMadtProcessorX2Apic *apic = acpi_data_push(entry, sizeof *apic);
 
@@ -63,11 +61,7 @@ void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
         apic->length = sizeof(*apic);
         apic->uid = cpu_to_le32(uid);
         apic->x2apic_id = cpu_to_le32(apic_id);
-        if (apic_ids->cpus[uid].cpu != NULL) {
+        apic->flags = cpu_to_le32(flags);
-            apic->flags = cpu_to_le32(1);
-        } else {
-            apic->flags = cpu_to_le32(0);
-        }
     }
 }
 
@@ -96,7 +90,7 @@ void acpi_build_madt(GArray *table_data, BIOSLinker *linker,
     build_append_int_noprefix(table_data, 1 /* PCAT_COMPAT */, 4); /* Flags */
 
     for (i = 0; i < apic_ids->len; i++) {
-        adevc->madt_cpu(adev, i, apic_ids, table_data);
+        adevc->madt_cpu(adev, i, apic_ids, table_data, false);
         if (apic_ids->cpus[i].arch_id > 254) {
             x2apic_mode = true;
         }

include/hw/acpi/acpi_dev_interface.h

@@ -53,6 +53,7 @@ struct AcpiDeviceIfClass {
     void (*ospm_status)(AcpiDeviceIf *adev, ACPIOSTInfoList ***list);
     void (*send_event)(AcpiDeviceIf *adev, AcpiEventStatusBits ev);
     void (*madt_cpu)(AcpiDeviceIf *adev, int uid,
-                     const CPUArchIdList *apic_ids, GArray *entry);
+                     const CPUArchIdList *apic_ids, GArray *entry,
+                     bool force_enabled);
 };
 #endif

include/hw/i386/pc.h

@@ -190,10 +190,10 @@ bool pc_system_ovmf_table_find(const char *entry, uint8_t **data,
                                int *data_len);
 void pc_system_parse_ovmf_flash(uint8_t *flash_ptr, size_t flash_size);
 
-
+/* hw/i386/acpi-common.c */
-/* acpi-build.c */
 void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
-                       const CPUArchIdList *apic_ids, GArray *entry);
+                       const CPUArchIdList *apic_ids, GArray *entry,
+                       bool force_enabled);
 
 /* sgx.c */
 void pc_machine_init_sgx_epc(PCMachineState *pcms);