[PULL 08/26] target/arm: Introduce ARMMMUIdx_Phys_{Realm,Root}

[Peter Maydell <peter.maydell@linaro.org>]

From: Richard Henderson <richard.henderson@linaro.org>

With FEAT_RME, there are four physical address spaces.
For now, just define the symbols, and mention them in
the same spots as the other Phys indexes in ptw.c.

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>
Message-id: 20230620124418.805717-9-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/cpu.h | 23 +++++++++++++++++++++--
 target/arm/ptw.c | 10 ++++++++--
 2 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index b3386197759..590216b8559 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -2870,8 +2870,10 @@ typedef enum ARMMMUIdx {
     ARMMMUIdx_Stage2    = 9 | ARM_MMU_IDX_A,
 
     /* TLBs with 1-1 mapping to the physical address spaces. */
-    ARMMMUIdx_Phys_S    = 10 | ARM_MMU_IDX_A,
-    ARMMMUIdx_Phys_NS   = 11 | ARM_MMU_IDX_A,
+    ARMMMUIdx_Phys_S     = 10 | ARM_MMU_IDX_A,
+    ARMMMUIdx_Phys_NS    = 11 | ARM_MMU_IDX_A,
+    ARMMMUIdx_Phys_Root  = 12 | ARM_MMU_IDX_A,
+    ARMMMUIdx_Phys_Realm = 13 | ARM_MMU_IDX_A,
 
     /*
      * These are not allocated TLBs and are used only for AT system
@@ -2935,6 +2937,23 @@ typedef enum ARMASIdx {
     ARMASIdx_TagS = 3,
 } ARMASIdx;
 
+static inline ARMMMUIdx arm_space_to_phys(ARMSecuritySpace space)
+{
+    /* Assert the relative order of the physical mmu indexes. */
+    QEMU_BUILD_BUG_ON(ARMSS_Secure != 0);
+    QEMU_BUILD_BUG_ON(ARMMMUIdx_Phys_NS != ARMMMUIdx_Phys_S + ARMSS_NonSecure);
+    QEMU_BUILD_BUG_ON(ARMMMUIdx_Phys_Root != ARMMMUIdx_Phys_S + ARMSS_Root);
+    QEMU_BUILD_BUG_ON(ARMMMUIdx_Phys_Realm != ARMMMUIdx_Phys_S + ARMSS_Realm);
+
+    return ARMMMUIdx_Phys_S + space;
+}
+
+static inline ARMSecuritySpace arm_phys_to_space(ARMMMUIdx idx)
+{
+    assert(idx >= ARMMMUIdx_Phys_S && idx <= ARMMMUIdx_Phys_Realm);
+    return idx - ARMMMUIdx_Phys_S;
+}
+
 static inline bool arm_v7m_csselr_razwi(ARMCPU *cpu)
 {
     /* If all the CLIDR.Ctypem bits are 0 there are no caches, and
diff --git a/target/arm/ptw.c b/target/arm/ptw.c
index 3f3517f70b6..a742bc18263 100644
--- a/target/arm/ptw.c
+++ b/target/arm/ptw.c
@@ -215,8 +215,10 @@ static bool regime_translation_disabled(CPUARMState *env, ARMMMUIdx mmu_idx,
     case ARMMMUIdx_E3:
         break;
 
-    case ARMMMUIdx_Phys_NS:
     case ARMMMUIdx_Phys_S:
+    case ARMMMUIdx_Phys_NS:
+    case ARMMMUIdx_Phys_Root:
+    case ARMMMUIdx_Phys_Realm:
         /* No translation for physical address spaces. */
         return true;
 
@@ -2672,8 +2674,10 @@ static bool get_phys_addr_disabled(CPUARMState *env, target_ulong address,
     switch (mmu_idx) {
     case ARMMMUIdx_Stage2:
     case ARMMMUIdx_Stage2_S:
-    case ARMMMUIdx_Phys_NS:
     case ARMMMUIdx_Phys_S:
+    case ARMMMUIdx_Phys_NS:
+    case ARMMMUIdx_Phys_Root:
+    case ARMMMUIdx_Phys_Realm:
         break;
 
     default:
@@ -2861,6 +2865,8 @@ static bool get_phys_addr_with_struct(CPUARMState *env, S1Translate *ptw,
     switch (mmu_idx) {
     case ARMMMUIdx_Phys_S:
     case ARMMMUIdx_Phys_NS:
+    case ARMMMUIdx_Phys_Root:
+    case ARMMMUIdx_Phys_Realm:
         /* Checking Phys early avoids special casing later vs regime_el. */
         return get_phys_addr_disabled(env, address, access_type, mmu_idx,
                                       is_secure, result, fi);
-- 
2.34.1