From 79b2c4b1e77358364db6f60b2cf49ddd70fa2281 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Mon, 5 Mar 2018 13:54:03 -0500
Subject: [PATCH] target/arm: Convert get_phys_addr_pmsav5() to not return FSC
 values

Make get_phys_addr_pmsav5() return a fault type in the ARMMMUFaultInfo
structure, which we convert to the FSC at the callsite.

Note that PMSAv5 does not define any guest-visible fault status
register, so the different "fsr" values we were previously
returning are entirely arbitrary. So we can just switch to using
the most appropriae fi->type values without worrying that we
need to special-case FaultInfo->FSC conversion for PMSAv5.

Backports commit 53a4e5c5b07b2f50c538511b74b0d3d4964695ea from qemu
---
 qemu/target/arm/helper.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/qemu/target/arm/helper.c b/qemu/target/arm/helper.c
index db4987c2..a723ec39 100644
--- a/qemu/target/arm/helper.c
+++ b/qemu/target/arm/helper.c
@@ -8728,7 +8728,8 @@ static bool get_phys_addr_pmsav8(CPUARMState *env, uint32_t address,
 
 static bool get_phys_addr_pmsav5(CPUARMState *env, uint32_t address,
                                  MMUAccessType access_type, ARMMMUIdx mmu_idx,
-                                 hwaddr *phys_ptr, int *prot, uint32_t *fsr)
+                                 hwaddr *phys_ptr, int *prot,
+                                 ARMMMUFaultInfo *fi)
 {
     int n;
     uint32_t mask;
@@ -8758,7 +8759,7 @@ static bool get_phys_addr_pmsav5(CPUARMState *env, uint32_t address,
         }
     }
     if (n < 0) {
-        *fsr = 2;
+        fi->type = ARMFault_Background;
         return true;
     }
 
@@ -8770,11 +8771,13 @@ static bool get_phys_addr_pmsav5(CPUARMState *env, uint32_t address,
     mask = (mask >> (n * 4)) & 0xf;
     switch (mask) {
     case 0:
-        *fsr = 1;
+        fi->type = ARMFault_Permission;
+        fi->level = 1;
         return true;
     case 1:
         if (is_user) {
-            *fsr = 1;
+            fi->type = ARMFault_Permission;
+            fi->level = 1;
             return true;
         }
         *prot = PAGE_READ | PAGE_WRITE;
@@ -8790,7 +8793,8 @@ static bool get_phys_addr_pmsav5(CPUARMState *env, uint32_t address,
         break;
     case 5:
         if (is_user) {
-            *fsr = 1;
+            fi->type = ARMFault_Permission;
+            fi->level = 1;
             return true;
         }
         *prot = PAGE_READ;
@@ -8800,7 +8804,8 @@ static bool get_phys_addr_pmsav5(CPUARMState *env, uint32_t address,
         break;
     default:
         /* Bad permission.  */
-        *fsr = 1;
+        fi->type = ARMFault_Permission;
+        fi->level = 1;
         return true;
     }
     *prot |= PAGE_EXEC;
@@ -9003,7 +9008,8 @@ static bool get_phys_addr(CPUARMState *env, target_ulong address,
         } else {
             /* Pre-v7 MPU */
             ret = get_phys_addr_pmsav5(env, address, access_type, mmu_idx,
-                                       phys_ptr, prot, fsr);
+                                       phys_ptr, prot, fi);
+            *fsr = arm_fi_to_sfsc(fi);
         }
         qemu_log_mask(CPU_LOG_MMU, "PMSA MPU lookup for %s at 0x%08" PRIx32
                       " mmu_idx %u -> %s (prot %c%c%c)\n",