[Qemu-devel] [PATCH for-4.2 07/24] target/arm: Enable HCR_E2H for VHE

[Richard Henderson <richard.henderson@linaro.org>]

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/cpu.h    | 7 -------
 target/arm/helper.c | 6 +++++-
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index e6a76d14c6..e37008a4f7 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1366,13 +1366,6 @@ static inline void xpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
 #define HCR_ATA       (1ULL << 56)
 #define HCR_DCT       (1ULL << 57)
 
-/*
- * When we actually implement ARMv8.1-VHE we should add HCR_E2H to
- * HCR_MASK and then clear it again if the feature bit is not set in
- * hcr_write().
- */
-#define HCR_MASK      ((1ULL << 34) - 1)
-
 #define SCR_NS                (1U << 0)
 #define SCR_IRQ               (1U << 1)
 #define SCR_FIQ               (1U << 2)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 3a9f35bf4b..0a55096770 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -4623,7 +4623,8 @@ static const ARMCPRegInfo el3_no_el2_v8_cp_reginfo[] = {
 static void hcr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
 {
     ARMCPU *cpu = env_archcpu(env);
-    uint64_t valid_mask = HCR_MASK;
+    /* Begin with bits defined in base ARMv8.0.  */
+    uint64_t valid_mask = MAKE_64BIT_MASK(0, 34);
 
     if (arm_feature(env, ARM_FEATURE_EL3)) {
         valid_mask &= ~HCR_HCD;
@@ -4637,6 +4638,9 @@ static void hcr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
          */
         valid_mask &= ~HCR_TSC;
     }
+    if (cpu_isar_feature(aa64_vh, cpu)) {
+        valid_mask |= HCR_E2H;
+    }
     if (cpu_isar_feature(aa64_lor, cpu)) {
         valid_mask |= HCR_TLOR;
     }
-- 
2.17.1