[PATCH v5 14/17] include/hw/core: Create struct CPUJumpCache

[Richard Henderson <richard.henderson@linaro.org>]

Wrap the bare TranslationBlock pointer into a structure.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 include/hw/core/cpu.h     | 8 ++++++--
 accel/tcg/cpu-exec.c      | 9 ++++++---
 accel/tcg/cputlb.c        | 2 +-
 accel/tcg/translate-all.c | 4 ++--
 4 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 9e47184513..ee5b75dea0 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -232,6 +232,10 @@ struct hvf_vcpu_state;
 #define TB_JMP_CACHE_BITS 12
 #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS)
 
+typedef struct {
+    TranslationBlock *tb;
+} CPUJumpCache;
+
 /* work queue */
 
 /* The union type allows passing of 64 bit target pointers on 32 bit
@@ -361,7 +365,7 @@ struct CPUState {
     IcountDecr *icount_decr_ptr;
 
     /* Accessed in parallel; all accesses must be atomic */
-    TranslationBlock *tb_jmp_cache[TB_JMP_CACHE_SIZE];
+    CPUJumpCache tb_jmp_cache[TB_JMP_CACHE_SIZE];
 
     struct GDBRegisterState *gdb_regs;
     int gdb_num_regs;
@@ -452,7 +456,7 @@ static inline void cpu_tb_jmp_cache_clear(CPUState *cpu)
     unsigned int i;
 
     for (i = 0; i < TB_JMP_CACHE_SIZE; i++) {
-        qatomic_set(&cpu->tb_jmp_cache[i], NULL);
+        qatomic_set(&cpu->tb_jmp_cache[i].tb, NULL);
     }
 }
 
diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index dd58a144a8..c6283d5798 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -252,7 +252,7 @@ static inline TranslationBlock *tb_lookup(CPUState *cpu, target_ulong pc,
     tcg_debug_assert(!(cflags & CF_INVALID));
 
     hash = tb_jmp_cache_hash_func(pc);
-    tb = qatomic_rcu_read(&cpu->tb_jmp_cache[hash]);
+    tb = qatomic_rcu_read(&cpu->tb_jmp_cache[hash].tb);
 
     if (likely(tb &&
                tb->pc == pc &&
@@ -266,7 +266,7 @@ static inline TranslationBlock *tb_lookup(CPUState *cpu, target_ulong pc,
     if (tb == NULL) {
         return NULL;
     }
-    qatomic_set(&cpu->tb_jmp_cache[hash], tb);
+    qatomic_set(&cpu->tb_jmp_cache[hash].tb, tb);
     return tb;
 }
 
@@ -987,6 +987,8 @@ int cpu_exec(CPUState *cpu)
 
             tb = tb_lookup(cpu, pc, cs_base, flags, cflags);
             if (tb == NULL) {
+                uint32_t h;
+
                 mmap_lock();
                 tb = tb_gen_code(cpu, pc, cs_base, flags, cflags);
                 mmap_unlock();
@@ -994,7 +996,8 @@ int cpu_exec(CPUState *cpu)
                  * We add the TB in the virtual pc hash table
                  * for the fast lookup
                  */
-                qatomic_set(&cpu->tb_jmp_cache[tb_jmp_cache_hash_func(pc)], tb);
+                h = tb_jmp_cache_hash_func(pc);
+                qatomic_set(&cpu->tb_jmp_cache[h].tb, tb);
             }
 
 #ifndef CONFIG_USER_ONLY
diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
index f5e6ca2da2..fb8f3087f1 100644
--- a/accel/tcg/cputlb.c
+++ b/accel/tcg/cputlb.c
@@ -103,7 +103,7 @@ static void tb_jmp_cache_clear_page(CPUState *cpu, target_ulong page_addr)
     unsigned int i, i0 = tb_jmp_cache_hash_page(page_addr);
 
     for (i = 0; i < TB_JMP_PAGE_SIZE; i++) {
-        qatomic_set(&cpu->tb_jmp_cache[i0 + i], NULL);
+        qatomic_set(&cpu->tb_jmp_cache[i0 + i].tb, NULL);
     }
 }
 
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index f429d33981..efa479ccf3 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -1187,8 +1187,8 @@ static void do_tb_phys_invalidate(TranslationBlock *tb, bool rm_from_page_list)
     /* remove the TB from the hash list */
     h = tb_jmp_cache_hash_func(tb->pc);
     CPU_FOREACH(cpu) {
-        if (qatomic_read(&cpu->tb_jmp_cache[h]) == tb) {
-            qatomic_set(&cpu->tb_jmp_cache[h], NULL);
+        if (qatomic_read(&cpu->tb_jmp_cache[h].tb) == tb) {
+            qatomic_set(&cpu->tb_jmp_cache[h].tb, NULL);
         }
     }
 
-- 
2.34.1