From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: David Hildenbrand <david@redhat.com>
Subject: [PATCH 21/26] target/s390x: Remove use_exit_tb
Date: Sun, 20 Jun 2021 18:34:34 -0700 [thread overview]
Message-ID: <20210621013439.1791385-22-richard.henderson@linaro.org> (raw)
In-Reply-To: <20210621013439.1791385-1-richard.henderson@linaro.org>
We have not needed to end a TB for I/O since ba3e7926691
("icount: clean up cpu_can_io at the entry to the block").
In use_goto_tb, the check for singlestep_enabled is in the
generic translator_use_goto_tb. In s390x_tr_tb_stop, the
check for singlestep_enabled is in the preceeding do_debug test.
Which leaves only FLAG_MASK_PER: fold that test alone into
the two callers of use_exit tb.
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/s390x/translate.c | 11 ++---------
1 file changed, 2 insertions(+), 9 deletions(-)
diff --git a/target/s390x/translate.c b/target/s390x/translate.c
index 4bb5d82a37..de7d846461 100644
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -685,16 +685,9 @@ static void gen_op_calc_cc(DisasContext *s)
set_cc_static(s);
}
-static bool use_exit_tb(DisasContext *s)
-{
- return s->base.singlestep_enabled ||
- (tb_cflags(s->base.tb) & CF_LAST_IO) ||
- (s->base.tb->flags & FLAG_MASK_PER);
-}
-
static bool use_goto_tb(DisasContext *s, uint64_t dest)
{
- if (unlikely(use_exit_tb(s))) {
+ if (unlikely(s->base.tb->flags & FLAG_MASK_PER)) {
return false;
}
return translator_use_goto_tb(&s->base, dest);
@@ -6634,7 +6627,7 @@ static void s390x_tr_tb_stop(DisasContextBase *dcbase, CPUState *cs)
/* Exit the TB, either by raising a debug exception or by return. */
if (dc->do_debug) {
gen_exception(EXCP_DEBUG);
- } else if (use_exit_tb(dc) ||
+ } else if ((dc->base.tb->flags & FLAG_MASK_PER) ||
dc->base.is_jmp == DISAS_PC_STALE_NOCHAIN) {
tcg_gen_exit_tb(NULL, 0);
} else {
--
2.25.1
next prev parent reply other threads:[~2021-06-21 1:52 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-21 1:34 [PATCH 00/26] accel/tcg: Introduce translator_use_goto_tb Richard Henderson
2021-06-21 1:34 ` [PATCH 01/26] " Richard Henderson
2021-06-21 6:24 ` Max Filippov
2021-06-21 12:50 ` Philippe Mathieu-Daudé
2021-06-21 13:47 ` Richard Henderson
2021-06-21 15:03 ` Philippe Mathieu-Daudé
2021-06-21 13:45 ` Luis Fernando Fujita Pires
2021-06-21 1:34 ` [PATCH 02/26] target/alpha: Remove use_exit_tb Richard Henderson
2021-06-21 1:34 ` [PATCH 03/26] target/alpha: Remove in_superpage Richard Henderson
2021-06-21 1:34 ` [PATCH 04/26] target/alpha: Use translator_use_goto_tb Richard Henderson
2021-06-21 1:34 ` [PATCH 05/26] target/arm: " Richard Henderson
2021-06-21 10:20 ` Peter Maydell
2021-06-21 1:34 ` [PATCH 06/26] target/avr: " Richard Henderson
2021-06-21 1:34 ` [PATCH 07/26] target/avr: Mark some helpers noreturn Richard Henderson
2021-06-21 5:39 ` Michael Rolnik
2021-06-21 12:31 ` Philippe Mathieu-Daudé
2021-06-21 1:34 ` [PATCH 08/26] target/cris: Use translator_use_goto_tb Richard Henderson
2021-06-21 1:34 ` [PATCH 09/26] target/hppa: " Richard Henderson
2021-06-21 1:34 ` [PATCH 10/26] target/i386: " Richard Henderson
2021-06-21 1:34 ` [PATCH 11/26] target/m68k: " Richard Henderson
2021-06-21 7:35 ` Laurent Vivier
2021-06-21 1:34 ` [PATCH 12/26] target/microblaze: " Richard Henderson
2021-06-21 1:34 ` [PATCH 13/26] target/mips: " Richard Henderson
2021-06-21 1:34 ` [PATCH 14/26] target/mips: Fix missing else in gen_goto_tb Richard Henderson
2021-06-21 12:25 ` Philippe Mathieu-Daudé
2021-06-21 1:34 ` [PATCH 15/26] target/nios2: Use translator_use_goto_tb Richard Henderson
2021-06-21 1:34 ` [PATCH 16/26] target/openrisc: " Richard Henderson
2021-06-21 1:34 ` [PATCH 17/26] target/ppc: " Richard Henderson
2021-06-21 13:45 ` Luis Fernando Fujita Pires
2021-06-21 1:34 ` [PATCH 18/26] target/riscv: " Richard Henderson
2021-06-21 22:22 ` Alistair Francis
2021-06-21 1:34 ` [PATCH 19/26] target/rx: " Richard Henderson
2021-06-21 1:34 ` [PATCH 20/26] target/s390x: " Richard Henderson
2021-06-21 1:34 ` Richard Henderson [this message]
2021-06-21 1:34 ` [PATCH 22/26] target/sh4: " Richard Henderson
2021-06-21 1:34 ` [PATCH 23/26] target/sparc: " Richard Henderson
2021-06-21 9:09 ` Mark Cave-Ayland
2021-06-21 1:34 ` [PATCH 24/26] target/tricore: " Richard Henderson
2021-06-21 14:27 ` Bastian Koppelmann
2021-06-21 1:34 ` [PATCH 25/26] target/tricore: Use tcg_gen_lookup_and_goto_ptr Richard Henderson
2021-06-21 14:32 ` Bastian Koppelmann
2021-06-21 1:34 ` [PATCH 26/26] target/xtensa: Use translator_use_goto_tb Richard Henderson
2021-06-21 6:24 ` Max Filippov
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