accel/tcg: Widen plugin_gen_empty_mem_callback to i64

Since we do this inside gen_empty_mem_cb anyway, let's do this earlier inside tcg expansion. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
qemu · May 16, 2023 · f0a9867 · f0a9867
1 parent 1935c32
commit f0a9867
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Showing 3 changed files with 25 additions and 16 deletions.
diff --git a/accel/tcg/plugin-gen.c b/accel/tcg/plugin-gen.c
@@ -124,23 +124,20 @@ static void gen_empty_inline_cb(void)
     tcg_temp_free_i64(val);
 }
 
-static void gen_empty_mem_cb(TCGv addr, uint32_t info)
+static void gen_empty_mem_cb(TCGv_i64 addr, uint32_t info)
 {
     TCGv_i32 cpu_index = tcg_temp_ebb_new_i32();
     TCGv_i32 meminfo = tcg_temp_ebb_new_i32();
-    TCGv_i64 addr64 = tcg_temp_ebb_new_i64();
     TCGv_ptr udata = tcg_temp_ebb_new_ptr();
 
     tcg_gen_movi_i32(meminfo, info);
     tcg_gen_movi_ptr(udata, 0);
     tcg_gen_ld_i32(cpu_index, cpu_env,
                    -offsetof(ArchCPU, env) + offsetof(CPUState, cpu_index));
-    tcg_gen_extu_tl_i64(addr64, addr);
 
-    gen_helper_plugin_vcpu_mem_cb(cpu_index, meminfo, addr64, udata);
+    gen_helper_plugin_vcpu_mem_cb(cpu_index, meminfo, addr, udata);
 
     tcg_temp_free_ptr(udata);
-    tcg_temp_free_i64(addr64);
     tcg_temp_free_i32(meminfo);
     tcg_temp_free_i32(cpu_index);
 }
@@ -197,7 +194,7 @@ static void plugin_gen_empty_callback(enum plugin_gen_from from)
     }
 }
 
-void plugin_gen_empty_mem_callback(TCGv addr, uint32_t info)
+void plugin_gen_empty_mem_callback(TCGv_i64 addr, uint32_t info)
 {
     enum qemu_plugin_mem_rw rw = get_plugin_meminfo_rw(info);
 

diff --git a/include/exec/plugin-gen.h b/include/exec/plugin-gen.h
@@ -27,7 +27,7 @@ void plugin_gen_insn_start(CPUState *cpu, const struct DisasContextBase *db);
 void plugin_gen_insn_end(void);
 
 void plugin_gen_disable_mem_helpers(void);
-void plugin_gen_empty_mem_callback(TCGv addr, uint32_t info);
+void plugin_gen_empty_mem_callback(TCGv_i64 addr, uint32_t info);
 
 static inline void plugin_insn_append(abi_ptr pc, const void *from, size_t size)
 {
@@ -69,7 +69,7 @@ static inline void plugin_gen_tb_end(CPUState *cpu)
 static inline void plugin_gen_disable_mem_helpers(void)
 { }
 
-static inline void plugin_gen_empty_mem_callback(TCGv addr, uint32_t info)
+static inline void plugin_gen_empty_mem_callback(TCGv_i64 addr, uint32_t info)
 { }
 
 static inline void plugin_insn_append(abi_ptr pc, const void *from, size_t size)

diff --git a/tcg/tcg-op-ldst.c b/tcg/tcg-op-ldst.c
@@ -115,30 +115,42 @@ static void tcg_gen_req_mo(TCGBar type)
 }
 
 /* Only required for loads, where value might overlap addr. */
-static TCGv plugin_maybe_preserve_addr(TCGv vaddr)
+static TCGv_i64 plugin_maybe_preserve_addr(TCGv vaddr)
 {
 #ifdef CONFIG_PLUGIN
     if (tcg_ctx->plugin_insn != NULL) {
         /* Save a copy of the vaddr for use after a load.  */
-        TCGv temp = tcg_temp_new();
-        tcg_gen_mov_tl(temp, vaddr);
+        TCGv_i64 temp = tcg_temp_ebb_new_i64();
+        tcg_gen_extu_tl_i64(temp, vaddr);
         return temp;
     }
 #endif
     return NULL;
 }
 
 static void
-plugin_gen_mem_callbacks(TCGv copy_addr, TCGv orig_addr, MemOpIdx oi,
+plugin_gen_mem_callbacks(TCGv_i64 copy_addr, TCGv orig_addr, MemOpIdx oi,
                          enum qemu_plugin_mem_rw rw)
 {
 #ifdef CONFIG_PLUGIN
     if (tcg_ctx->plugin_insn != NULL) {
         qemu_plugin_meminfo_t info = make_plugin_meminfo(oi, rw);
-        plugin_gen_empty_mem_callback(copy_addr ? : orig_addr, info);
+
+#if TARGET_LONG_BITS == 64
         if (copy_addr) {
-            tcg_temp_free(copy_addr);
+            plugin_gen_empty_mem_callback(copy_addr, info);
+            tcg_temp_free_i64(copy_addr);
+        } else {
+            plugin_gen_empty_mem_callback(orig_addr, info);
         }
+#else
+        if (!copy_addr) {
+            copy_addr = tcg_temp_ebb_new_i64();
+            tcg_gen_extu_tl_i64(copy_addr, orig_addr);
+        }
+        plugin_gen_empty_mem_callback(copy_addr, info);
+        tcg_temp_free_i64(copy_addr);
+#endif
     }
 #endif
 }
@@ -147,7 +159,7 @@ void tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, MemOp memop)
 {
     MemOp orig_memop;
     MemOpIdx oi;
-    TCGv copy_addr;
+    TCGv_i64 copy_addr;
 
     tcg_gen_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD);
     memop = tcg_canonicalize_memop(memop, 0, 0);
@@ -223,7 +235,7 @@ void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop)
 {
     MemOp orig_memop;
     MemOpIdx oi;
-    TCGv copy_addr;
+    TCGv_i64 copy_addr;
 
     if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) {
         tcg_gen_qemu_ld_i32(TCGV_LOW(val), addr, idx, memop);