[PULL 82/96] target/ppc: Add function to get protection key for hash32 MMU

[Nicholas Piggin <npiggin@gmail.com>]

From: BALATON Zoltan <balaton@eik.bme.hu>

Add a function to get key bit from SR and use it instead of open coded
version.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 target/ppc/mmu-hash32.c | 9 ++++++---
 target/ppc/mmu-hash32.h | 5 +++++
 target/ppc/mmu_common.c | 3 +--
 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/target/ppc/mmu-hash32.c b/target/ppc/mmu-hash32.c
index 8a446c8a7d..93559447ff 100644
--- a/target/ppc/mmu-hash32.c
+++ b/target/ppc/mmu-hash32.c
@@ -42,7 +42,7 @@ static int ppc_hash32_pte_prot(int mmu_idx,
 {
     unsigned pp, key;
 
-    key = !!(mmuidx_pr(mmu_idx) ? (sr & SR32_KP) : (sr & SR32_KS));
+    key = ppc_hash32_key(mmuidx_pr(mmu_idx), sr);
     pp = pte.pte1 & HPTE32_R_PP;
 
     return ppc_hash32_prot(key, pp, !!(sr & SR32_NX));
@@ -145,7 +145,6 @@ static bool ppc_hash32_direct_store(PowerPCCPU *cpu, target_ulong sr,
 {
     CPUState *cs = CPU(cpu);
     CPUPPCState *env = &cpu->env;
-    int key = !!(mmuidx_pr(mmu_idx) ? (sr & SR32_KP) : (sr & SR32_KS));
 
     qemu_log_mask(CPU_LOG_MMU, "direct store...\n");
 
@@ -206,7 +205,11 @@ static bool ppc_hash32_direct_store(PowerPCCPU *cpu, target_ulong sr,
         cpu_abort(cs, "ERROR: insn should not need address translation\n");
     }
 
-    *prot = key ? PAGE_READ | PAGE_WRITE : PAGE_READ;
+    if (ppc_hash32_key(mmuidx_pr(mmu_idx), sr)) {
+        *prot = PAGE_READ | PAGE_WRITE;
+    } else {
+        *prot = PAGE_READ;
+    }
     if (check_prot_access_type(*prot, access_type)) {
         *raddr = eaddr;
         return true;
diff --git a/target/ppc/mmu-hash32.h b/target/ppc/mmu-hash32.h
index bc4eedbecc..5902cf8333 100644
--- a/target/ppc/mmu-hash32.h
+++ b/target/ppc/mmu-hash32.h
@@ -102,6 +102,11 @@ static inline void ppc_hash32_store_hpte1(PowerPCCPU *cpu,
     stl_phys(CPU(cpu)->as, base + pte_offset + HASH_PTE_SIZE_32 / 2, pte1);
 }
 
+static inline bool ppc_hash32_key(bool pr, target_ulong sr)
+{
+    return pr ? (sr & SR32_KP) : (sr & SR32_KS);
+}
+
 static inline int ppc_hash32_prot(bool key, int pp, bool nx)
 {
     int prot;
diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c
index 339df377e8..1ed2f45ac7 100644
--- a/target/ppc/mmu_common.c
+++ b/target/ppc/mmu_common.c
@@ -310,8 +310,7 @@ static int mmu6xx_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
     pr = FIELD_EX64(env->msr, MSR, PR);
 
     sr = env->sr[eaddr >> 28];
-    ctx->key = (((sr & 0x20000000) && pr) ||
-                ((sr & 0x40000000) && !pr)) ? 1 : 0;
+    ctx->key = ppc_hash32_key(pr, sr);
     ds = sr & SR32_T;
     nx = sr & SR32_NX;
     vsid = sr & SR32_VSID;
-- 
2.45.2