tcg: let plugins instrument virtual memory accesses

To capture all memory accesses we need hook into all the various
helper functions that are involved in memory operations as well as the
injected inline helper calls. A later commit will allow us to resolve
the actual guest HW addresses by replaying the lookup.

Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: drop haddr handling, just deal in vaddr]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index 81c33d6475..c01f59c743 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -268,6 +268,7 @@ void cpu_exec_step_atomic(CPUState *cpu)
             qemu_mutex_unlock_iothread();
         }
         assert_no_pages_locked();
+        qemu_plugin_disable_mem_helpers(cpu);
     }
 
     if (cpu_in_exclusive_context(cpu)) {
@@ -701,6 +702,8 @@ int cpu_exec(CPUState *cpu)
         if (qemu_mutex_iothread_locked()) {
             qemu_mutex_unlock_iothread();
         }
+        qemu_plugin_disable_mem_helpers(cpu);
+
         assert_no_pages_locked();
     }