target/arm: Consider GP an attribute in get_phys_addr_lpae

Both GP and DBM are in the upper attribute block.
Extend the computation of attrs to include them,
then simplify the setting of guarded.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20221024051851.3074715-11-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

target/arm/ptw.c

@@ -1058,7 +1058,6 @@ static bool get_phys_addr_lpae(CPUARMState *env, S1Translate *ptw,
     uint32_t el = regime_el(env, mmu_idx);
     uint64_t descaddrmask;
     bool aarch64 = arm_el_is_aa64(env, el);
-    bool guarded = false;
     uint64_t descriptor;
     bool nstable;
 
@@ -1324,15 +1323,14 @@ static bool get_phys_addr_lpae(CPUARMState *env, S1Translate *ptw,
     descaddr &= ~(hwaddr)(page_size - 1);
     descaddr |= (address & (page_size - 1));
     /* Extract attributes from the descriptor */
-    attrs = descriptor & (MAKE_64BIT_MASK(2, 10) | MAKE_64BIT_MASK(52, 12));
+    attrs = descriptor & (MAKE_64BIT_MASK(2, 10) | MAKE_64BIT_MASK(50, 14));
 
     if (regime_is_stage2(mmu_idx)) {
         /* Stage 2 table descriptors do not include any attribute fields */
         goto skip_attrs;
     }
     /* Merge in attributes from table descriptors */
     attrs |= nstable << 5; /* NS */
-    guarded = extract64(descriptor, 50, 1);  /* GP */
     if (param.hpd) {
         /* HPD disables all the table attributes except NSTable.  */
         goto skip_attrs;
@@ -1385,7 +1383,7 @@ static bool get_phys_addr_lpae(CPUARMState *env, S1Translate *ptw,
 
     /* When in aarch64 mode, and BTI is enabled, remember GP in the TLB.  */
     if (aarch64 && cpu_isar_feature(aa64_bti, cpu)) {
-        result->f.guarded = guarded;
+        result->f.guarded = extract64(attrs, 50, 1); /* GP */
     }
 
     if (regime_is_stage2(mmu_idx)) {