[PATCH 10/14] hw/i386/vmport: Add support for CMD_GET_VCPU_INFO

[Liran Alon <liran.alon@oracle.com>]

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.leshchenko@oracle.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
---
 hw/i386/vmport.c     | 13 +++++++++++++
 include/hw/i386/pc.h |  1 +
 2 files changed, 14 insertions(+)

diff --git a/hw/i386/vmport.c b/hw/i386/vmport.c
index 26231fc9d718..b33ef9c01d65 100644
--- a/hw/i386/vmport.c
+++ b/hw/i386/vmport.c
@@ -42,6 +42,13 @@ typedef enum {
    VMX_TYPE_WORKSTATION_ENTERPRISE /* Deprecated type used for ACE 1.x */
 } VMX_Type;
 
+/* 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 {
@@ -173,6 +180,11 @@ 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)
 {
@@ -219,6 +231,7 @@ static void vmport_realizefn(DeviceState *dev, Error **errp)
     vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, 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);
 }
 
 static Property vmport_properties[] = {
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 14d321e3cbbe..e880ca39ee3b 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -147,6 +147,7 @@ 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