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| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-07-19 08:36:18 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-09-13 19:08:43 +0200 |
| commit | 6d21e4208f382dd8ca1f7995a6dd9ea7ca281163 (patch) | |
| tree | 81569f437586f0525ac788a09826af4e0c8020bb /include/exec | |
| parent | 118b07308a8cedc16ef63d7ab243a95f1701db40 (diff) | |
| download | qemu-6d21e4208f382dd8ca1f7995a6dd9ea7ca281163.zip qemu-6d21e4208f382dd8ca1f7995a6dd9ea7ca281163.tar.gz qemu-6d21e4208f382dd8ca1f7995a6dd9ea7ca281163.tar.bz2 | |
tcg: Prepare TB invalidation for lockless TB lookup
When invalidating a translation block, set an invalid flag into the
TranslationBlock structure first. It is also necessary to check whether
the target TB is still valid after acquiring 'tb_lock' but before calling
tb_add_jump() since TB lookup is to be performed out of 'tb_lock' in
future. Note that we don't have to check 'last_tb'; an already invalidated
TB will not be executed anyway and it is thus safe to patch it.
Suggested-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/exec-all.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index d008296..a0e87be 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -225,6 +225,8 @@ struct TranslationBlock { #define CF_USE_ICOUNT 0x20000 #define CF_IGNORE_ICOUNT 0x40000 /* Do not generate icount code */ + uint16_t invalid; + void *tc_ptr; /* pointer to the translated code */ uint8_t *tc_search; /* pointer to search data */ /* original tb when cflags has CF_NOCACHE */ |