util: Enhance flush_icache_range with separate data pointer

We are shortly going to have a split rw/rx jit buffer.  Depending
on the host, we need to flush the dcache at the rw data pointer and
flush the icache at the rx code pointer.

For now, the two passed pointers are identical, so there is no
effective change in behaviour.

Reviewed-by: Joelle van Dyne <j@getutm.app>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/tcg/tcg.c b/tcg/tcg.c
index 9bdc450..759a41d 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1079,7 +1079,8 @@ void tcg_prologue_init(TCGContext *s)
 
     buf1 = s->code_ptr;
 #ifndef CONFIG_TCG_INTERPRETER
-    flush_icache_range((uintptr_t)buf0, (uintptr_t)buf1);
+    flush_idcache_range((uintptr_t)buf0, (uintptr_t)buf0,
+                        tcg_ptr_byte_diff(buf1, buf0));
 #endif
 
     /* Deduct the prologue from the buffer.  */
@@ -4328,7 +4329,8 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb)
 
 #ifndef CONFIG_TCG_INTERPRETER
     /* flush instruction cache */
-    flush_icache_range((uintptr_t)s->code_buf, (uintptr_t)s->code_ptr);
+    flush_idcache_range((uintptr_t)s->code_buf, (uintptr_t)s->code_buf,
+                        tcg_ptr_byte_diff(s->code_ptr, s->code_buf));
 #endif
 
     return tcg_current_code_size(s);