[v4,02/40] target/arm: Enable HCR_E2H for VHE

Message ID 20191203022937.1474-3-richard.henderson@linaro.org
State Superseded
Headers show
Series
  • target/arm: Implement ARMv8.1-VHE
Related show

Commit Message

Richard Henderson Dec. 3, 2019, 2:28 a.m.
Reviewed-by: Alex Bennée <alex.bennee@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(-)

-- 
2.17.1

Patch

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 994cad2014..9729e62d2c 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1387,13 +1387,6 @@  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 0bf8f53d4b..d81daadf45 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -4672,7 +4672,8 @@  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;
@@ -4686,6 +4687,9 @@  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;
     }