[PATCH v3 5/5] accel/tcg: Always call tcg_flush_jmp_cache() on reset

[Philippe Mathieu-Daudé]

In commit bb6cf6f016 ("accel/tcg: Factor tcg_cpu_reset_hold() out")
we unfortunately restricted the tcg_flush_jmp_cache() to system
emulation. Move it to the common tcg_exec_cpu_reset_hold() handler
so user emulation gets the jmp_cache initialized when threads
are created.

Remove the NULL check in tcg_flush_jmp_cache() from commit 4e4fa6c12d
("accel/tcg: Complete cpu initialization before registration") which
was a band-aid fix for incorrect commit bb6cf6f016.

Cc: qemu-sta...@nongnu.org
Fixes: bb6cf6f016 ("accel/tcg: Factor tcg_cpu_reset_hold() out")
Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
---
 accel/tcg/cpu-exec.c             | 2 ++
 accel/tcg/sysemu/tcg-accel-ops.c | 2 --
 accel/tcg/translate-all.c        | 5 -----
 3 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index 1bf85c324d..7e04df2902 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -36,6 +36,7 @@
 #include "exec/replay-core.h"
 #include "sysemu/tcg.h"
 #include "exec/helper-proto-common.h"
+#include "exec/tb-flush.h"
 #include "tb-jmp-cache.h"
 #include "tb-hash.h"
 #include "tb-context.h"
@@ -1099,4 +1100,5 @@ void tcg_exec_unrealizefn(CPUState *cpu)
 
 void tcg_exec_cpu_reset_hold(CPUState *cpu)
 {
+    tcg_flush_jmp_cache(cpu);
 }
diff --git a/accel/tcg/sysemu/tcg-accel-ops.c b/accel/tcg/sysemu/tcg-accel-ops.c
index 82c8368f87..13e450c088 100644
--- a/accel/tcg/sysemu/tcg-accel-ops.c
+++ b/accel/tcg/sysemu/tcg-accel-ops.c
@@ -34,7 +34,6 @@
 #include "qemu/timer.h"
 #include "exec/exec-all.h"
 #include "exec/hwaddr.h"
-#include "exec/tb-flush.h"
 #include "exec/gdbstub.h"
 #include "../internal-common.h"
 #include "hw/core/cpu.h"
@@ -83,7 +82,6 @@ int tcg_cpu_exec(CPUState *cpu)
 static void tcg_cpu_reset_hold(CPUState *cpu)
 {
     tcg_exec_cpu_reset_hold(cpu);
-    tcg_flush_jmp_cache(cpu);
 
     tlb_flush(cpu);
 }
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index 83cc14fbde..93202fa3c1 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -663,11 +663,6 @@ void tcg_flush_jmp_cache(CPUState *cpu)
 {
     CPUJumpCache *jc = cpu->tb_jmp_cache;
 
-    /* During early initialization, the cache may not yet be allocated. */
-    if (unlikely(jc == NULL)) {
-        return;
-    }
-
     for (int i = 0; i < TB_JMP_CACHE_SIZE; i++) {
         qatomic_set(&jc->array[i].tb, NULL);
     }
-- 
2.41.0