target/ppc: Extend ppc_radix64_check_prot() with a 'partition_scoped' bool

This prepares ground for partition-scoped Radix translation.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Message-Id: <20200403140056.59465-3-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

diff --git a/target/ppc/mmu-radix64.c b/target/ppc/mmu-radix64.c
index 4b0d0ff50a3c2e8f9f632fa562ca35223761ea3d..11b3c6d48c654332b875e94d09389a605c423a26 100644 (file)
--- a/target/ppc/mmu-radix64.c
+++ b/target/ppc/mmu-radix64.c
@@ -105,7 +105,8 @@ static void ppc_radix64_raise_si(PowerPCCPU *cpu, int rwx, vaddr eaddr,
 
 
 static bool ppc_radix64_check_prot(PowerPCCPU *cpu, int rwx, uint64_t pte,
-                                   int *fault_cause, int *prot)
+                                   int *fault_cause, int *prot,
+                                   bool partition_scoped)
 {
     CPUPPCState *env = &cpu->env;
     const int need_prot[] = { PAGE_READ, PAGE_WRITE, PAGE_EXEC };
@@ -121,11 +122,11 @@ static bool ppc_radix64_check_prot(PowerPCCPU *cpu, int rwx, uint64_t pte,
     }
 
     /* Determine permissions allowed by Encoded Access Authority */
-    if ((pte & R_PTE_EAA_PRIV) && msr_pr) { /* Insufficient Privilege */
+    if (!partition_scoped && (pte & R_PTE_EAA_PRIV) && msr_pr) {
         *prot = 0;
-    } else if (msr_pr || (pte & R_PTE_EAA_PRIV)) {
+    } else if (msr_pr || (pte & R_PTE_EAA_PRIV) || partition_scoped) {
         *prot = ppc_radix64_get_prot_eaa(pte);
-    } else { /* !msr_pr && !(pte & R_PTE_EAA_PRIV) */
+    } else { /* !msr_pr && !(pte & R_PTE_EAA_PRIV) && !partition_scoped */
         *prot = ppc_radix64_get_prot_eaa(pte);
         *prot &= ppc_radix64_get_prot_amr(cpu); /* Least combined permissions */
     }
@@ -250,7 +251,7 @@ static int ppc_radix64_process_scoped_xlate(PowerPCCPU *cpu, int rwx,
                                 g_raddr, g_page_size, &fault_cause, &pte_addr);
 
     if (!(pte & R_PTE_VALID) ||
-        ppc_radix64_check_prot(cpu, rwx, pte, &fault_cause, g_prot)) {
+        ppc_radix64_check_prot(cpu, rwx, pte, &fault_cause, g_prot, false)) {
         /* No valid pte or access denied due to protection */
         if (cause_excp) {
             ppc_radix64_raise_si(cpu, rwx, eaddr, fault_cause);