hw/intc/gicv3: Add data fields for virtualization support

As the first step in adding support for the virtualization
extensions to the GICv3 emulation:
 * add the necessary data fields to the state structures
 * add the fields to the migration state, as a subsection
   which is only present if virtualization is enabled

The use of a subsection means we retain migration
compatibility as EL2 is not enabled on any CPUs currently.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 1483977924-14522-8-git-send-email-peter.maydell@linaro.org

1 files changed, 25 insertions, 0 deletions

diff --git a/hw/intc/arm_gicv3_common.c b/hw/intc/arm_gicv3_common.c
index 0ee67a40b5..16b9b0f7eb 100644
--- a/hw/intc/arm_gicv3_common.c
+++ b/hw/intc/arm_gicv3_common.c
@@ -49,6 +49,27 @@ static int gicv3_post_load(void *opaque, int version_id)
     return 0;
 }
 
+static bool virt_state_needed(void *opaque)
+{
+    GICv3CPUState *cs = opaque;
+
+    return cs->num_list_regs != 0;
+}
+
+static const VMStateDescription vmstate_gicv3_cpu_virt = {
+    .name = "arm_gicv3_cpu/virt",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = virt_state_needed,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT64_2DARRAY(ich_apr, GICv3CPUState, 3, 4),
+        VMSTATE_UINT64(ich_hcr_el2, GICv3CPUState),
+        VMSTATE_UINT64_ARRAY(ich_lr_el2, GICv3CPUState, GICV3_LR_MAX),
+        VMSTATE_UINT64(ich_vmcr_el2, GICv3CPUState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 static const VMStateDescription vmstate_gicv3_cpu = {
     .name = "arm_gicv3_cpu",
     .version_id = 1,
@@ -75,6 +96,10 @@ static const VMStateDescription vmstate_gicv3_cpu = {
         VMSTATE_UINT64_ARRAY(icc_igrpen, GICv3CPUState, 3),
         VMSTATE_UINT64(icc_ctlr_el3, GICv3CPUState),
         VMSTATE_END_OF_LIST()
+    },
+    .subsections = (const VMStateDescription * []) {
+        &vmstate_gicv3_cpu_virt,
+        NULL
     }
 };