[PATCH 05/10] hw/loongarch: Add smbios support

[Xiaojuan Yang]

Add smbios support for loongarch virt machine, and put them into fw_cfg
table so that bios can parse them quickly. The weblink of smbios spec:
https://www.dmtf.org/dsp/DSP0134, the version is 3.6.0.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
---
 hw/loongarch/Kconfig        |  1 +
 hw/loongarch/loongson3.c    | 36 ++++++++++++++++++++++++++++++++++++
 include/hw/loongarch/virt.h |  1 +
 3 files changed, 38 insertions(+)

diff --git a/hw/loongarch/Kconfig b/hw/loongarch/Kconfig
index 35b6680772..610552e522 100644
--- a/hw/loongarch/Kconfig
+++ b/hw/loongarch/Kconfig
@@ -14,3 +14,4 @@ config LOONGARCH_VIRT
     select LOONGARCH_PCH_MSI
     select LOONGARCH_EXTIOI
     select LS7A_RTC
+    select SMBIOS
diff --git a/hw/loongarch/loongson3.c b/hw/loongarch/loongson3.c
index c381a9c016..04251aed0b 100644
--- a/hw/loongarch/loongson3.c
+++ b/hw/loongarch/loongson3.c
@@ -30,11 +30,45 @@
 #include "hw/misc/unimp.h"
 #include "hw/loongarch/fw_cfg.h"
 #include "target/loongarch/cpu.h"
+#include "hw/firmware/smbios.h"
 
 #define PM_BASE 0x10080000
 #define PM_SIZE 0x100
 #define PM_CTRL 0x10
 
+static void virt_build_smbios(LoongArchMachineState *lams)
+{
+    MachineState *ms = MACHINE(lams);
+    MachineClass *mc = MACHINE_GET_CLASS(lams);
+    uint8_t *smbios_tables, *smbios_anchor;
+    size_t smbios_tables_len, smbios_anchor_len;
+    const char *product = "QEMU Virtual Machine";
+
+    if (!lams->fw_cfg) {
+        return;
+    }
+
+    smbios_set_defaults("QEMU", product, mc->name, false,
+                        true, SMBIOS_ENTRY_POINT_TYPE_64);
+
+    smbios_get_tables(ms, NULL, 0, &smbios_tables, &smbios_tables_len,
+                      &smbios_anchor, &smbios_anchor_len, &error_fatal);
+
+    if (smbios_anchor) {
+        fw_cfg_add_file(lams->fw_cfg, "etc/smbios/smbios-tables",
+                        smbios_tables, smbios_tables_len);
+        fw_cfg_add_file(lams->fw_cfg, "etc/smbios/smbios-anchor",
+                        smbios_anchor, smbios_anchor_len);
+    }
+}
+
+static void virt_machine_done(Notifier *notifier, void *data)
+{
+    LoongArchMachineState *lams = container_of(notifier,
+                                        LoongArchMachineState, machine_done);
+    virt_build_smbios(lams);
+}
+
 struct memmap_entry {
     uint64_t address;
     uint64_t length;
@@ -509,6 +543,8 @@ static void loongarch_init(MachineState *machine)
     }
     /* Initialize the IO interrupt subsystem */
     loongarch_irq_init(lams);
+    lams->machine_done.notify = virt_machine_done;
+    qemu_add_machine_init_done_notifier(&lams->machine_done);
 }
 
 static void loongarch_class_init(ObjectClass *oc, void *data)
diff --git a/include/hw/loongarch/virt.h b/include/hw/loongarch/virt.h
index ec37d86e44..9b7cdfae78 100644
--- a/include/hw/loongarch/virt.h
+++ b/include/hw/loongarch/virt.h
@@ -33,6 +33,7 @@ struct LoongArchMachineState {
     bool         bios_loaded;
     /* State for other subsystems/APIs: */
     FWCfgState  *fw_cfg;
+    Notifier     machine_done;
 };
 
 #define TYPE_LOONGARCH_MACHINE  MACHINE_TYPE_NAME("virt")
-- 
2.31.1