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[v2,1/6] target/arm: Implement RAZ/WI HACTLR2

Message ID 20180820153020.21478-2-peter.maydell@linaro.org
State New
Headers show
Series target/arm: Some pieces of support for 32-bit Hyp mode | expand

Commit Message

Peter Maydell Aug. 20, 2018, 3:30 p.m. UTC 
The v8 AArch32 HACTLR2 register maps to bits [63:32] of ACTLR_EL2.
We implement ACTLR_EL2 as RAZ/WI, so make HACTLR2 also RAZ/WI.
(We put the regdef next to ACTLR_EL2 as a reminder in case we
ever make ACTLR_EL2 something other than RAZ/WI).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
changes from v1: only define in ARMv8, not v7
---
 target/arm/helper.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
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Patch

diff --git a/target/arm/helper.c b/target/arm/helper.c
index c9bce1efcb2..22547d8e739 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -5459,6 +5459,16 @@  void register_cp_regs_for_features(ARMCPU *cpu)
             REGINFO_SENTINEL
         };
         define_arm_cp_regs(cpu, auxcr_reginfo);
+        if (arm_feature(env, ARM_FEATURE_V8)) {
+            /* HACTLR2 maps to ACTLR_EL2[63:32] and is not in ARMv7 */
+            ARMCPRegInfo hactlr2_reginfo = {
+                .name = "HACTLR2", .state = ARM_CP_STATE_AA32,
+                .cp = 15, .opc1 = 4, .crn = 1, .crm = 0, .opc2 = 3,
+                .access = PL2_RW, .type = ARM_CP_CONST,
+                .resetvalue = 0
+            };
+            define_one_arm_cp_reg(cpu, &hactlr2_reginfo);
+        }
     }
 
     if (arm_feature(env, ARM_FEATURE_CBAR)) {