[v6,20/48] target/ppc: Remove pp_check() and reuse ppc_hash32_pp_prot()

Commit Message

BALATON Zoltan May 11, 2024, 1:45 a.m. UTC

The ppc_hash32_pp_prot() function in mmu-hash32.c is the same as
pp_check() in mmu_common.c, merge these to remove duplicated code.
Define the common function in internal.h as static lnline otherwise
exporting the function from mmu-hash32.c would stop the compiler
inlining it which results in slightly lower performance.

Signed-off-by: BALATON Zoltan <[e-mail]>
Reviewed-by: Nicholas Piggin <[e-mail]>
---
 target/ppc/internal.h   | 35 ++++++++++++++++++++++++++++++++
 target/ppc/mmu-hash32.c | 45 -----------------------------------------
 target/ppc/mmu_common.c | 44 ++--------------------------------------
 3 files changed, 37 insertions(+), 87 deletions(-)

Patch

diff --git a/target/ppc/internal.h b/target/ppc/internal.h
index 98b41a970c..ffdf6c075d 100644
--- a/target/ppc/internal.h
+++ b/target/ppc/internal.h
@@ -256,6 +256,41 @@  static inline int prot_for_access_type(MMUAccessType access_type)
 #ifndef CONFIG_USER_ONLY
 
 /* PowerPC MMU emulation */
+static inline int ppc_hash32_pp_prot(int key, int pp, int nx)
+{
+    int prot;
+
+    if (key == 0) {
+        switch (pp) {
+        case 0x0:
+        case 0x1:
+        case 0x2:
+            prot = PAGE_READ | PAGE_WRITE;
+            break;
+        case 0x3:
+            prot = PAGE_READ;
+            break;
+        default:
+            g_assert_not_reached();
+        }
+    } else {
+        switch (pp) {
+        case 0x0:
+            prot = 0;
+            break;
+        case 0x1:
+        case 0x3:
+            prot = PAGE_READ;
+            break;
+        case 0x2:
+            prot = PAGE_READ | PAGE_WRITE;
+            break;
+        default:
+            g_assert_not_reached();
+        }
+    }
+    return nx ? prot : prot | PAGE_EXEC;
+}
 
 typedef struct mmu_ctx_t mmu_ctx_t;
 
diff --git a/target/ppc/mmu-hash32.c b/target/ppc/mmu-hash32.c
index da6e8b293c..21fc731771 100644
--- a/target/ppc/mmu-hash32.c
+++ b/target/ppc/mmu-hash32.c
@@ -37,51 +37,6 @@ 
 #  define LOG_BATS(...) do { } while (0)
 #endif
 
-static int ppc_hash32_pp_prot(int key, int pp, int nx)
-{
-    int prot;
-
-    if (key == 0) {
-        switch (pp) {
-        case 0x0:
-        case 0x1:
-        case 0x2:
-            prot = PAGE_READ | PAGE_WRITE;
-            break;
-
-        case 0x3:
-            prot = PAGE_READ;
-            break;
-
-        default:
-            abort();
-        }
-    } else {
-        switch (pp) {
-        case 0x0:
-            prot = 0;
-            break;
-
-        case 0x1:
-        case 0x3:
-            prot = PAGE_READ;
-            break;
-
-        case 0x2:
-            prot = PAGE_READ | PAGE_WRITE;
-            break;
-
-        default:
-            abort();
-        }
-    }
-    if (nx == 0) {
-        prot |= PAGE_EXEC;
-    }
-
-    return prot;
-}
-
 static int ppc_hash32_pte_prot(int mmu_idx,
                                target_ulong sr, ppc_hash_pte32_t pte)
 {
diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c
index 004ea2111d..ab082bd12d 100644
--- a/target/ppc/mmu_common.c
+++ b/target/ppc/mmu_common.c
@@ -65,44 +65,6 @@  void ppc_store_sdr1(CPUPPCState *env, target_ulong value)
 /*****************************************************************************/
 /* PowerPC MMU emulation */
 
-static int pp_check(int key, int pp, int nx)
-{
-    int access;
-
-    /* Compute access rights */
-    access = 0;
-    if (key == 0) {
-        switch (pp) {
-        case 0x0:
-        case 0x1:
-        case 0x2:
-            access |= PAGE_WRITE;
-            /* fall through */
-        case 0x3:
-            access |= PAGE_READ;
-            break;
-        }
-    } else {
-        switch (pp) {
-        case 0x0:
-            access = 0;
-            break;
-        case 0x1:
-        case 0x3:
-            access = PAGE_READ;
-            break;
-        case 0x2:
-            access = PAGE_READ | PAGE_WRITE;
-            break;
-        }
-    }
-    if (nx == 0) {
-        access |= PAGE_EXEC;
-    }
-
-    return access;
-}
-
 static int check_prot(int prot, MMUAccessType access_type)
 {
     return prot & prot_for_access_type(access_type) ? 0 : -2;
@@ -130,7 +92,7 @@  static int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx, target_ulong pte0,
                                 MMUAccessType access_type)
 {
     target_ulong ptem, mmask;
-    int access, ret, pteh, ptev, pp;
+    int ret, pteh, ptev, pp;
 
     ret = -1;
     /* Check validity and table match */
@@ -149,11 +111,9 @@  static int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx, target_ulong pte0,
                     return -3;
                 }
             }
-            /* Compute access rights */
-            access = pp_check(ctx->key, pp, ctx->nx);
             /* Keep the matching PTE information */
             ctx->raddr = pte1;
-            ctx->prot = access;
+            ctx->prot = ppc_hash32_pp_prot(ctx->key, pp, ctx->nx);
             ret = check_prot(ctx->prot, access_type);
             if (ret == 0) {
                 /* Access granted */