diff options
| author | Sergey Fedorov <serge.fdrv@gmail.com> | 2016-04-09 01:00:23 +0300 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-05-12 14:06:42 -1000 |
| commit | 90aa39a1cc4837360889f0e033ca25cc82100308 (patch) | |
| tree | b8f857f456fec4ecd5b5931f41c7b17b52a353eb /target-s390x/translate.c | |
| parent | 5b053a4a28278bca606eeff7d1c0730df1b047e9 (diff) | |
tcg: Allow goto_tb to any target PC in user mode
In user mode, there's only a static address translation, TBs are always
invalidated properly and direct jumps are reset when mapping change.
Thus the destination address is always valid for direct jumps and
there's no need to restrict it to the pages the TB resides in.
Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Blue Swirl <blauwirbel@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-s390x/translate.c')
| -rw-r--r-- | target-s390x/translate.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/target-s390x/translate.c b/target-s390x/translate.c index c5179fe05d..e99eb5cb01 100644 --- a/target-s390x/translate.c +++ b/target-s390x/translate.c @@ -608,12 +608,17 @@ static void gen_op_calc_cc(DisasContext *s) static int use_goto_tb(DisasContext *s, uint64_t dest) { - /* NOTE: we handle the case where the TB spans two pages here */ - return (((dest & TARGET_PAGE_MASK) == (s->tb->pc & TARGET_PAGE_MASK) - || (dest & TARGET_PAGE_MASK) == (s->pc & TARGET_PAGE_MASK)) - && !s->singlestep_enabled - && !(s->tb->cflags & CF_LAST_IO) - && !(s->tb->flags & FLAG_MASK_PER)); + if (unlikely(s->singlestep_enabled) || + (s->tb->cflags & CF_LAST_IO) || + (s->tb->flags & FLAG_MASK_PER)) { + return false; + } +#ifndef CONFIG_USER_ONLY + return (dest & TARGET_PAGE_MASK) == (s->tb->pc & TARGET_PAGE_MASK) || + (dest & TARGET_PAGE_MASK) == (s->pc & TARGET_PAGE_MASK); +#else + return true; +#endif } static void account_noninline_branch(DisasContext *s, int cc_op) |