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[RFC,PATCH-for-10.1,v2,6/7] tcg: Have tcg_req_mo() use TCGCPUOps::guest_default_memory_order

Message ID 20250321181549.3331-7-philmd@linaro.org
State New
Headers show
Series tcg: Move TCG_GUEST_DEFAULT_MO -> TCGCPUOps::guest_default_memory_order | expand

Commit Message

Philippe Mathieu-Daudé March 21, 2025, 6:15 p.m. UTC 
In order to use TCG with multiple targets, replace the
compile time use of TCG_GUEST_DEFAULT_MO by a runtime access
to TCGCPUOps::guest_default_memory_order via CPUState.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 accel/tcg/internal-target.h | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)
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Patch

diff --git a/accel/tcg/internal-target.h b/accel/tcg/internal-target.h
index 992362be7e6..d5b8c4b730b 100644
--- a/accel/tcg/internal-target.h
+++ b/accel/tcg/internal-target.h
@@ -44,16 +44,15 @@  G_NORETURN void cpu_io_recompile(CPUState *cpu, uintptr_t retaddr);
 
 /**
  * tcg_req_mo:
+ * @guest_mo: Guest default memory order
  * @type: TCGBar
  *
  * Filter @type to the barrier that is required for the guest
  * memory ordering vs the host memory ordering.  A non-zero
  * result indicates that some barrier is required.
- *
- * This is a macro so that it's constant even without optimization.
  */
-#define tcg_req_mo(type) \
-    ((type) & TCG_GUEST_DEFAULT_MO & ~TCG_TARGET_DEFAULT_MO)
+#define tcg_req_mo(guest_mo, type) \
+    ((type) & guest_mo & ~TCG_TARGET_DEFAULT_MO)
 
 /**
  * cpu_req_mo:
@@ -65,7 +64,7 @@  G_NORETURN void cpu_io_recompile(CPUState *cpu, uintptr_t retaddr);
  */
 #define cpu_req_mo(cpu, type)     \
     do {                          \
-        if (tcg_req_mo(type)) {   \
+        if (tcg_req_mo(cpu->cc->tcg_ops->guest_default_memory_order, type)) { \
             smp_mb();             \
         }                         \
     } while (0)