cpu: flush TB cache when loading VMState

Flushing TB cache is required because TBs key in the cache may match
different code which existed in the previous state.

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Signed-off-by: Maria Klimushenkova <maria.klimushenkova@ispras.ru>
Message-Id: <20180110134846.12940.99993.stgit@pasha-VirtualBox>
[Add comment suggested by Peter Maydell. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>

1 files changed, 7 insertions, 0 deletions

diff --git a/exec.c b/exec.c
index 9f4f4501a8..d28fc0cd3d 100644
--- a/exec.c
+++ b/exec.c
@@ -623,6 +623,13 @@ static int cpu_common_post_load(void *opaque, int version_id)
     cpu->interrupt_request &= ~0x01;
     tlb_flush(cpu);
 
+    /* loadvm has just updated the content of RAM, bypassing the
+     * usual mechanisms that ensure we flush TBs for writes to
+     * memory we've translated code from. So we must flush all TBs,
+     * which will now be stale.
+     */
+    tb_flush(cpu);
+
     return 0;
 }