[PATCH v2 09/16] hw/i386/vmport: Add support for CMD_GETBIOSUUID

[Liran Alon]

This is VMware documented functionallity that some guests rely on.
Returns the BIOS UUID of the current virtual machine.

Reviewed-by: Nikita Leshenko <address@hidden>
Signed-off-by: Liran Alon <address@hidden>
---
 hw/i386/vmport.c         | 17 +++++++++++++++++
 include/hw/i386/vmport.h |  1 +
 2 files changed, 18 insertions(+)

diff --git a/hw/i386/vmport.c b/hw/i386/vmport.c
index 0ea5e5f4dd14..ef94f4fe78c6 100644
--- a/hw/i386/vmport.c
+++ b/hw/i386/vmport.c
@@ -27,6 +27,7 @@
 #include "hw/i386/vmport.h"
 #include "hw/input/i8042.h"
 #include "hw/qdev-properties.h"
+#include "sysemu/sysemu.h"
 #include "sysemu/hw_accel.h"
 #include "qemu/log.h"
 #include "trace.h"
@@ -136,6 +137,18 @@ static uint32_t vmport_cmd_get_version(void *opaque, 
uint32_t addr)
     return port_state->vmx_version;
 }
 
+static uint32_t vmport_cmd_get_bios_uuid(void *opaque, uint32_t addr)
+{
+    X86CPU *cpu = X86_CPU(current_cpu);
+    uint32_t *uuid_parts = (uint32_t *)(qemu_uuid.data);
+
+    cpu->env.regs[R_EAX] = le32_to_cpu(uuid_parts[0]);
+    cpu->env.regs[R_EBX] = le32_to_cpu(uuid_parts[1]);
+    cpu->env.regs[R_ECX] = le32_to_cpu(uuid_parts[2]);
+    cpu->env.regs[R_EDX] = le32_to_cpu(uuid_parts[3]);
+    return cpu->env.regs[R_EAX];
+}
+
 static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr)
 {
     X86CPU *cpu = X86_CPU(current_cpu);
@@ -184,9 +197,13 @@ static void vmport_realizefn(DeviceState *dev, Error 
**errp)
     isa_register_ioport(isadev, &s->io, 0x5658);
 
     port_state = s;
+
     /* Register some generic port commands */
     vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL);
     vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL);
+    if (s->version > 1) {
+        vmport_register(VMPORT_CMD_GETBIOSUUID, vmport_cmd_get_bios_uuid, 
NULL);
+    }
 }
 
 static Property vmport_properties[] = {
diff --git a/include/hw/i386/vmport.h b/include/hw/i386/vmport.h
index 0501ccac6ddf..7f33512ca6f0 100644
--- a/include/hw/i386/vmport.h
+++ b/include/hw/i386/vmport.h
@@ -6,6 +6,7 @@ typedef uint32_t (VMPortReadFunc)(void *opaque, uint32_t 
address);
 
 typedef enum {
     VMPORT_CMD_GETVERSION       = 10,
+    VMPORT_CMD_GETBIOSUUID      = 19,
     VMPORT_CMD_GETRAMSIZE       = 20,
     VMPORT_CMD_VMMOUSE_DATA     = 39,
     VMPORT_CMD_VMMOUSE_STATUS   = 40,
-- 
2.20.1