[PATCH v2 05/22] hw/arm/virt: Add support for Arm RME

[Jean-Philippe Brucker <jean-philippe@linaro.org>]

When confidential-guest-support is enabled for the virt machine, call
the RME init function, and add the RME flag to the VM type.

Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
v1->v2:
* Don't explicitly disable steal_time, it's now done through KVM capabilities
* Split patch
---
 hw/arm/virt.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index a9a913aead..07ad31876e 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -224,6 +224,11 @@ static const int a15irqmap[] = {
     [VIRT_PLATFORM_BUS] = 112, /* ...to 112 + PLATFORM_BUS_NUM_IRQS -1 */
 };
 
+static bool virt_machine_is_confidential(VirtMachineState *vms)
+{
+    return MACHINE(vms)->cgs;
+}
+
 static void create_randomness(MachineState *ms, const char *node)
 {
     struct {
@@ -2111,10 +2116,11 @@ static void machvirt_init(MachineState *machine)
      * if the guest has EL2 then we will use SMC as the conduit,
      * and otherwise we will use HVC (for backwards compatibility and
      * because if we're using KVM then we must use HVC).
+     * Realm guests must also use SMC.
      */
     if (vms->secure && firmware_loaded) {
         vms->psci_conduit = QEMU_PSCI_CONDUIT_DISABLED;
-    } else if (vms->virt) {
+    } else if (vms->virt || virt_machine_is_confidential(vms)) {
         vms->psci_conduit = QEMU_PSCI_CONDUIT_SMC;
     } else {
         vms->psci_conduit = QEMU_PSCI_CONDUIT_HVC;
@@ -2917,6 +2923,7 @@ static HotplugHandler *virt_machine_get_hotplug_handler(MachineState *machine,
 static int virt_kvm_type(MachineState *ms, const char *type_str)
 {
     VirtMachineState *vms = VIRT_MACHINE(ms);
+    int rme_vm_type = kvm_arm_rme_vm_type(ms);
     int max_vm_pa_size, requested_pa_size;
     bool fixed_ipa;
 
@@ -2946,7 +2953,11 @@ static int virt_kvm_type(MachineState *ms, const char *type_str)
      * the implicit legacy 40b IPA setting, in which case the kvm_type
      * must be 0.
      */
-    return fixed_ipa ? 0 : requested_pa_size;
+    if (fixed_ipa) {
+        return 0;
+    }
+
+    return requested_pa_size | rme_vm_type;
 }
 
 static void virt_machine_class_init(ObjectClass *oc, void *data)
-- 
2.44.0