target/ppc: Change partition-scope translate interface

Rather than always performing partition scope page table translation
with access type of 0 (MMU_DATA_LOAD), pass through the processor
access type which first initiated the translation sequence. Process-
scoped page table loads are then set to MMU_DATA_LOAD access type in
the xlate function.

This will allow more information to be passed to the exception
handler in the next patch.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

target/ppc/mmu-radix64.c

@@ -380,6 +380,14 @@ static int ppc_radix64_partition_scoped_xlate(PowerPCCPU *cpu,
     hwaddr pte_addr;
     uint64_t pte;
 
+    if (pde_addr) {
+        /*
+         * Translation of process-scoped tables/directories is performed as
+         * a read-access.
+         */
+        access_type = MMU_DATA_LOAD;
+    }
+
     qemu_log_mask(CPU_LOG_MMU, "%s for %s @0x%"VADDR_PRIx
                   " mmu_idx %u 0x%"HWADDR_PRIx"\n",
                   __func__, access_str(access_type),
@@ -477,10 +485,10 @@ static int ppc_radix64_process_scoped_xlate(PowerPCCPU *cpu,
          * is only used to translate the effective addresses of the
          * process table entries.
          */
-        ret = ppc_radix64_partition_scoped_xlate(cpu, 0, eaddr, prtbe_addr,
-                                                 pate, &h_raddr, &h_prot,
-                                                 &h_page_size, true,
-            /* mmu_idx is 5 because we're translating from hypervisor scope */
+        /* mmu_idx is 5 because we're translating from hypervisor scope */
+        ret = ppc_radix64_partition_scoped_xlate(cpu, access_type, eaddr,
+                                                 prtbe_addr, pate, &h_raddr,
+                                                 &h_prot, &h_page_size, true,
                                                  5, guest_visible);
         if (ret) {
             return ret;
@@ -519,11 +527,11 @@ static int ppc_radix64_process_scoped_xlate(PowerPCCPU *cpu,
          * translation
          */
         do {
-            ret = ppc_radix64_partition_scoped_xlate(cpu, 0, eaddr, pte_addr,
-                                                     pate, &h_raddr, &h_prot,
-                                                     &h_page_size, true,
             /* mmu_idx is 5 because we're translating from hypervisor scope */
-                                                     5, guest_visible);
+            ret = ppc_radix64_partition_scoped_xlate(cpu, access_type, eaddr,
+                                                     pte_addr, pate, &h_raddr,
+                                                     &h_prot, &h_page_size,
+                                                     true, 5, guest_visible);
             if (ret) {
                 return ret;
             }