[PATCH v5 02/20] target/arm: Update SCR and HCR for RME

[Richard Henderson]

Define the missing SCR and HCR bits, allow SCR_NSE and {SCR,HCR}_GPF
to be set, and invalidate TLBs when NSE changes.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/cpu.h    |  5 +++--
 target/arm/helper.c | 10 ++++++++--
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index c84ec2752f..318d1033b8 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1655,7 +1655,7 @@ static inline void xpsr_write(CPUARMState *env, uint32_t 
val, uint32_t mask)
 #define HCR_TERR      (1ULL << 36)
 #define HCR_TEA       (1ULL << 37)
 #define HCR_MIOCNCE   (1ULL << 38)
-/* RES0 bit 39 */
+#define HCR_TME       (1ULL << 39)
 #define HCR_APK       (1ULL << 40)
 #define HCR_API       (1ULL << 41)
 #define HCR_NV        (1ULL << 42)
@@ -1664,7 +1664,7 @@ static inline void xpsr_write(CPUARMState *env, uint32_t 
val, uint32_t mask)
 #define HCR_NV2       (1ULL << 45)
 #define HCR_FWB       (1ULL << 46)
 #define HCR_FIEN      (1ULL << 47)
-/* RES0 bit 48 */
+#define HCR_GPF       (1ULL << 48)
 #define HCR_TID4      (1ULL << 49)
 #define HCR_TICAB     (1ULL << 50)
 #define HCR_AMVOFFEN  (1ULL << 51)
@@ -1729,6 +1729,7 @@ static inline void xpsr_write(CPUARMState *env, uint32_t 
val, uint32_t mask)
 #define SCR_TRNDR             (1ULL << 40)
 #define SCR_ENTP2             (1ULL << 41)
 #define SCR_GPF               (1ULL << 48)
+#define SCR_NSE               (1ULL << 62)
 
 #define HSTR_TTEE (1 << 16)
 #define HSTR_TJDBX (1 << 17)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index d4bee43bd0..d2f0d9226e 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -1874,6 +1874,9 @@ static void scr_write(CPUARMState *env, const 
ARMCPRegInfo *ri, uint64_t value)
         if (cpu_isar_feature(aa64_fgt, cpu)) {
             valid_mask |= SCR_FGTEN;
         }
+        if (cpu_isar_feature(aa64_rme, cpu)) {
+            valid_mask |= SCR_NSE | SCR_GPF;
+        }
     } else {
         valid_mask &= ~(SCR_RW | SCR_ST);
         if (cpu_isar_feature(aa32_ras, cpu)) {
@@ -1903,10 +1906,10 @@ static void scr_write(CPUARMState *env, const 
ARMCPRegInfo *ri, uint64_t value)
     env->cp15.scr_el3 = value;
 
     /*
-     * If SCR_EL3.NS changes, i.e. arm_is_secure_below_el3, then
+     * If SCR_EL3.{NS,NSE} changes, i.e. change of security state,
      * we must invalidate all TLBs below EL3.
      */
-    if (changed & SCR_NS) {
+    if (changed & (SCR_NS | SCR_NSE)) {
         tlb_flush_by_mmuidx(env_cpu(env), (ARMMMUIdxBit_E10_0 |
                                            ARMMMUIdxBit_E20_0 |
                                            ARMMMUIdxBit_E10_1 |
@@ -5654,6 +5657,9 @@ static void do_hcr_write(CPUARMState *env, uint64_t 
value, uint64_t valid_mask)
         if (cpu_isar_feature(aa64_fwb, cpu)) {
             valid_mask |= HCR_FWB;
         }
+        if (cpu_isar_feature(aa64_rme, cpu)) {
+            valid_mask |= HCR_GPF;
+        }
     }
 
     if (cpu_isar_feature(any_evt, cpu)) {
-- 
2.34.1