[RFC PATCH 12/12] virt/acpi: add SDEI table if SDEI is enabled

[Heyi Guo <guoheyi@huawei.com>]

Add SDEI table if SDEI is enabled, so that guest OS can get aware and
utilize the interfaces.

Signed-off-by: Heyi Guo <guoheyi@huawei.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Dave Martin <Dave.Martin@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Shannon Zhao <shannon.zhaosl@gmail.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
---
 hw/arm/virt-acpi-build.c    | 16 ++++++++++++++++
 include/hw/acpi/acpi-defs.h |  5 +++++
 2 files changed, 21 insertions(+)

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 6cdf156..1088214 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -32,6 +32,7 @@
 #include "trace.h"
 #include "hw/core/cpu.h"
 #include "target/arm/cpu.h"
+#include "target/arm/sdei.h"
 #include "hw/acpi/acpi-defs.h"
 #include "hw/acpi/acpi.h"
 #include "hw/nvram/fw_cfg.h"
@@ -475,6 +476,16 @@ build_iort(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
 }
 
 static void
+build_sdei(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
+{
+    int sdei_start = table_data->len;
+
+    (void)acpi_data_push(table_data, sizeof(AcpiSdei));
+    build_header(linker, table_data, (void *)(table_data->data + sdei_start),
+                 "SDEI", table_data->len - sdei_start, 1, NULL, NULL);
+}
+
+static void
 build_spcr(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
 {
     AcpiSerialPortConsoleRedirection *spcr;
@@ -796,6 +807,11 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
     acpi_add_table(table_offsets, tables_blob);
     build_spcr(tables_blob, tables->linker, vms);
 
+    if (sdei_enabled) {
+        acpi_add_table(table_offsets, tables_blob);
+        build_sdei(tables_blob, tables->linker, vms);
+    }
+
     if (ms->numa_state->num_nodes > 0) {
         acpi_add_table(table_offsets, tables_blob);
         build_srat(tables_blob, tables->linker, vms);
diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h
index 57a3f58..0a2265d 100644
--- a/include/hw/acpi/acpi-defs.h
+++ b/include/hw/acpi/acpi-defs.h
@@ -634,4 +634,9 @@ struct AcpiIortRC {
 } QEMU_PACKED;
 typedef struct AcpiIortRC AcpiIortRC;
 
+struct AcpiSdei {
+    ACPI_TABLE_HEADER_DEF     /* ACPI common table header */
+} QEMU_PACKED;
+typedef struct AcpiSdei AcpiSdei;
+
 #endif
-- 
1.8.3.1