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| author | Sergey Fedorov | 2016-04-09 00:00:23 +0200 |
|---|---|---|
| committer | Richard Henderson | 2016-05-13 02:06:42 +0200 |
| commit | 90aa39a1cc4837360889f0e033ca25cc82100308 (patch) | |
| tree | b8f857f456fec4ecd5b5931f41c7b17b52a353eb /target-alpha | |
| parent | tcg: Clean up direct block chaining safety checks (diff) | |
| download | qemu-90aa39a1cc4837360889f0e033ca25cc82100308.tar.gz qemu-90aa39a1cc4837360889f0e033ca25cc82100308.tar.xz qemu-90aa39a1cc4837360889f0e033ca25cc82100308.zip | |
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-alpha')
| -rw-r--r-- | target-alpha/translate.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/target-alpha/translate.c b/target-alpha/translate.c index 5b86992dd3..8c2183a418 100644 --- a/target-alpha/translate.c +++ b/target-alpha/translate.c @@ -460,12 +460,16 @@ static bool use_goto_tb(DisasContext *ctx, uint64_t dest) || ctx->singlestep_enabled || singlestep) { return false; } +#ifndef CONFIG_USER_ONLY /* If the destination is in the superpage, the page perms can't change. */ if (in_superpage(ctx, dest)) { return true; } /* Check for the dest on the same page as the start of the TB. */ return ((ctx->tb->pc ^ dest) & TARGET_PAGE_MASK) == 0; +#else + return true; +#endif } static ExitStatus gen_bdirect(DisasContext *ctx, int ra, int32_t disp) |