[Qemu-devel] [RFC PATCH v3 09/11] hw/arm/virt-acpi-build: Generate RSDT table

[Shannon Zhao]

RDST points to other tables FADT, MADT, GTDT.

Signed-off-by: Shannon Zhao <zhaoshengl...@huawei.com>
---
 hw/arm/virt-acpi-build.c |   31 ++++++++++++++++++++++++++++++-
 1 files changed, 30 insertions(+), 1 deletions(-)

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index bee2e7f..245770a 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -176,6 +176,31 @@ static void acpi_dsdt_add_virtio(Aml *scope, const hwaddr 
*mmio_addrs,
     }
 }
 
+/* RSDT */
+static void
+build_rsdt(GArray *table_data, GArray *linker, GArray *table_offsets)
+{
+    AcpiRsdtDescriptorRev1 *rsdt;
+    size_t rsdt_len;
+    int i;
+
+    rsdt_len = sizeof(*rsdt) + sizeof(uint32_t) * table_offsets->len;
+    rsdt = acpi_data_push(table_data, rsdt_len);
+    memcpy(rsdt->table_offset_entry, table_offsets->data,
+           sizeof(uint32_t) * table_offsets->len);
+    for (i = 0; i < table_offsets->len; ++i) {
+        /* rsdt->table_offset_entry to be filled by Guest linker */
+        bios_linker_loader_add_pointer(linker,
+                                       ACPI_BUILD_TABLE_FILE,
+                                       ACPI_BUILD_TABLE_FILE,
+                                       table_data, 
&rsdt->table_offset_entry[i],
+                                       sizeof(uint32_t));
+    }
+    build_header(linker, table_data, (void *)rsdt, "RSDT",
+                 ACPI_BUILD_APPNAME6, ACPI_BUILD_APPNAME4,
+                 rsdt_len, 1);
+}
+
 /* GTDT */
 static void
 build_gtdt(GArray *table_data, GArray *linker, VirtGuestInfo *guest_info)
@@ -311,7 +336,7 @@ static
 void virt_acpi_build(VirtGuestInfo *guest_info, AcpiBuildTables *tables)
 {
     GArray *table_offsets;
-    unsigned dsdt;
+    unsigned dsdt, rsdt;
     VirtAcpiCpuInfo cpuinfo;
     GArray *tables_blob = tables->table_data->buf;
        
@@ -347,6 +372,10 @@ void virt_acpi_build(VirtGuestInfo *guest_info, 
AcpiBuildTables *tables)
     acpi_add_table(table_offsets, tables_blob);
     build_gtdt(tables_blob, tables->linker, guest_info);
 
+    /* RSDT is pointed to by RSDP */
+    rsdt = tables_blob->len;
+    build_rsdt(tables_blob, tables->linker, table_offsets);
+
     /* Cleanup memory that's no longer used. */
     g_array_free(table_offsets, true);
 }
-- 
1.7.1