target/arm: Add ARM_FEATURE_V7VE for v7 Virtualization Extensions

Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org>
Message-id: 1529699547-17044-5-git-send-email-alindsay@codeaurora.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 14 insertions, 7 deletions

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index aa62315cea..4584cd01bc 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -800,9 +800,20 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
 
     /* Some features automatically imply others: */
     if (arm_feature(env, ARM_FEATURE_V8)) {
-        set_feature(env, ARM_FEATURE_V7);
+        set_feature(env, ARM_FEATURE_V7VE);
+    }
+    if (arm_feature(env, ARM_FEATURE_V7VE)) {
+        /* v7 Virtualization Extensions. In real hardware this implies
+         * EL2 and also the presence of the Security Extensions.
+         * For QEMU, for backwards-compatibility we implement some
+         * CPUs or CPU configs which have no actual EL2 or EL3 but do
+         * include the various other features that V7VE implies.
+         * Presence of EL2 itself is ARM_FEATURE_EL2, and of the
+         * Security Extensions is ARM_FEATURE_EL3.
+         */
         set_feature(env, ARM_FEATURE_ARM_DIV);
         set_feature(env, ARM_FEATURE_LPAE);
+        set_feature(env, ARM_FEATURE_V7);
     }
     if (arm_feature(env, ARM_FEATURE_V7)) {
         set_feature(env, ARM_FEATURE_VAPA);
@@ -1524,15 +1535,13 @@ static void cortex_a7_initfn(Object *obj)
     ARMCPU *cpu = ARM_CPU(obj);
 
     cpu->dtb_compatible = "arm,cortex-a7";
-    set_feature(&cpu->env, ARM_FEATURE_V7);
+    set_feature(&cpu->env, ARM_FEATURE_V7VE);
     set_feature(&cpu->env, ARM_FEATURE_VFP4);
     set_feature(&cpu->env, ARM_FEATURE_NEON);
     set_feature(&cpu->env, ARM_FEATURE_THUMB2EE);
-    set_feature(&cpu->env, ARM_FEATURE_ARM_DIV);
     set_feature(&cpu->env, ARM_FEATURE_GENERIC_TIMER);
     set_feature(&cpu->env, ARM_FEATURE_DUMMY_C15_REGS);
     set_feature(&cpu->env, ARM_FEATURE_CBAR_RO);
-    set_feature(&cpu->env, ARM_FEATURE_LPAE);
     set_feature(&cpu->env, ARM_FEATURE_EL3);
     cpu->kvm_target = QEMU_KVM_ARM_TARGET_CORTEX_A7;
     cpu->midr = 0x410fc075;
@@ -1569,15 +1578,13 @@ static void cortex_a15_initfn(Object *obj)
     ARMCPU *cpu = ARM_CPU(obj);
 
     cpu->dtb_compatible = "arm,cortex-a15";
-    set_feature(&cpu->env, ARM_FEATURE_V7);
+    set_feature(&cpu->env, ARM_FEATURE_V7VE);
     set_feature(&cpu->env, ARM_FEATURE_VFP4);
     set_feature(&cpu->env, ARM_FEATURE_NEON);
     set_feature(&cpu->env, ARM_FEATURE_THUMB2EE);
-    set_feature(&cpu->env, ARM_FEATURE_ARM_DIV);
     set_feature(&cpu->env, ARM_FEATURE_GENERIC_TIMER);
     set_feature(&cpu->env, ARM_FEATURE_DUMMY_C15_REGS);
     set_feature(&cpu->env, ARM_FEATURE_CBAR_RO);
-    set_feature(&cpu->env, ARM_FEATURE_LPAE);
     set_feature(&cpu->env, ARM_FEATURE_EL3);
     cpu->kvm_target = QEMU_KVM_ARM_TARGET_CORTEX_A15;
     cpu->midr = 0x412fc0f1;