[PATCH v18 1/6] hw/arm/virt: Introduce RAS platform version and RAS machine option

[Xiang Zheng <zhengxiang9@xxxxxxxxxx>]

From: Dongjiu Geng <gengdongjiu@xxxxxxxxxx>

Support RAS Virtualization feature since version 4.2, disable it by
default in the old versions. Also add a machine option which allows user
to enable it explicitly.

Signed-off-by: Dongjiu Geng <gengdongjiu@xxxxxxxxxx>
Signed-off-by: Xiang Zheng <zhengxiang9@xxxxxxxxxx>
---
 hw/arm/virt.c         | 33 +++++++++++++++++++++++++++++++++
 include/hw/arm/virt.h |  2 ++
 2 files changed, 35 insertions(+)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index d74538b021..e0451433c8 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1783,6 +1783,20 @@ static void virt_set_its(Object *obj, bool value, Error **errp)
     vms->its = value;
 }
 
+static bool virt_get_ras(Object *obj, Error **errp)
+{
+    VirtMachineState *vms = VIRT_MACHINE(obj);
+
+    return vms->ras;
+}
+
+static void virt_set_ras(Object *obj, bool value, Error **errp)
+{
+    VirtMachineState *vms = VIRT_MACHINE(obj);
+
+    vms->ras = value;
+}
+
 static char *virt_get_gic_version(Object *obj, Error **errp)
 {
     VirtMachineState *vms = VIRT_MACHINE(obj);
@@ -2026,6 +2040,19 @@ static void virt_instance_init(Object *obj)
                                     "Valid values are none and smmuv3",
                                     NULL);
 
+    if (vmc->no_ras) {
+        vms->ras = false;
+    } else {
+        /* Default disallows RAS instantiation */
+        vms->ras = false;
+        object_property_add_bool(obj, "ras", virt_get_ras,
+                                 virt_set_ras, NULL);
+        object_property_set_description(obj, "ras",
+                                        "Set on/off to enable/disable "
+                                        "RAS instantiation",
+                                        NULL);
+    }
+
     vms->irqmap = a15irqmap;
 
     virt_flash_create(vms);
@@ -2058,8 +2085,14 @@ DEFINE_VIRT_MACHINE_AS_LATEST(4, 2)
 
 static void virt_machine_4_1_options(MachineClass *mc)
 {
+    VirtMachineClass *vmc = VIRT_MACHINE_CLASS(OBJECT_CLASS(mc));
+
     virt_machine_4_2_options(mc);
     compat_props_add(mc->compat_props, hw_compat_4_1, hw_compat_4_1_len);
+    /* Disable memory recovery feature for 4.1 as RAS support was
+     * introduced with 4.2.
+     */
+    vmc->no_ras = true;
 }
 DEFINE_VIRT_MACHINE(4, 1)
 
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index a72094204e..04ab42ca42 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -103,6 +103,7 @@ typedef struct {
     bool disallow_affinity_adjustment;
     bool no_its;
     bool no_pmu;
+    bool no_ras;
     bool claim_edge_triggered_timers;
     bool smbios_old_sys_ver;
     bool no_highmem_ecam;
@@ -119,6 +120,7 @@ typedef struct {
     bool highmem_ecam;
     bool its;
     bool virt;
+    bool ras;
     int32_t gic_version;
     VirtIOMMUType iommu;
     struct arm_boot_info bootinfo;
-- 
2.19.1