[PATCH v3 12/16] hw/i386/vmport: Add support for CMD_GET_VCPU_INFO

[Liran Alon]

Command currently returns that it is unimplemented by setting
the reserved-bit in it's return value.

Following patches will return various useful vCPU information
to guest.

Reviewed-by: Nikita Leshenko <nikita.leshche...@oracle.com>
Signed-off-by: Liran Alon <liran.a...@oracle.com>
---
 hw/i386/vmport.c         | 14 ++++++++++++++
 include/hw/i386/vmport.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/hw/i386/vmport.c b/hw/i386/vmport.c
index 7e57eda4b526..2ce78aaf7b4c 100644
--- a/hw/i386/vmport.c
+++ b/hw/i386/vmport.c
@@ -55,6 +55,13 @@
 #define VMPORT_COMPAT_CMDS_V2                   \
     (1 << VMPORT_COMPAT_CMDS_V2_BIT)
 
+/* vCPU features reported by CMD_GET_VCPU_INFO */
+#define VCPU_INFO_SLC64_BIT             0
+#define VCPU_INFO_SYNC_VTSCS_BIT        1
+#define VCPU_INFO_HV_REPLAY_OK_BIT      2
+#define VCPU_INFO_LEGACY_X2APIC_BIT     3
+#define VCPU_INFO_RESERVED_BIT          31
+
 #define VMPORT(obj) OBJECT_CHECK(VMPortState, (obj), TYPE_VMPORT)
 
 typedef struct VMPortState {
@@ -199,6 +206,11 @@ static uint32_t vmport_cmd_time_full(void *opaque, 
uint32_t addr)
     return VMPORT_MAGIC;
 }
 
+static uint32_t vmport_cmd_get_vcpu_info(void *opaque, uint32_t addr)
+{
+    return 1 << VCPU_INFO_RESERVED_BIT;
+}
+
 /* vmmouse helpers */
 void vmmouse_get_data(uint32_t *data)
 {
@@ -247,6 +259,8 @@ static void vmport_realizefn(DeviceState *dev, Error **errp)
         vmport_register(VMPORT_CMD_GETBIOSUUID, vmport_cmd_get_bios_uuid, 
NULL);
         vmport_register(VMPORT_CMD_GETTIME, vmport_cmd_time, NULL);
         vmport_register(VMPORT_CMD_GETTIMEFULL, vmport_cmd_time_full, NULL);
+        vmport_register(VMPORT_CMD_GET_VCPU_INFO, vmport_cmd_get_vcpu_info,
+                        NULL);
     }
 }
 
diff --git a/include/hw/i386/vmport.h b/include/hw/i386/vmport.h
index 5d19963ed417..34cc050b1ffa 100644
--- a/include/hw/i386/vmport.h
+++ b/include/hw/i386/vmport.h
@@ -13,6 +13,7 @@ typedef enum {
     VMPORT_CMD_VMMOUSE_STATUS   = 40,
     VMPORT_CMD_VMMOUSE_COMMAND  = 41,
     VMPORT_CMD_GETTIMEFULL      = 46,
+    VMPORT_CMD_GET_VCPU_INFO    = 68,
     VMPORT_ENTRIES
 } VMPortCommand;
 
-- 
2.20.1