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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: Ilya Leoshkevich <iii@linux.ibm.com>,
=?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@linaro.org>
Subject: [PULL 01/23] linux-user/main: Allow setting tb-size
Date: Sat, 8 Mar 2025 14:58:39 -0800
Message-ID: <20250308225902.1208237-2-richard.henderson@linaro.org>
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From: Ilya Leoshkevich <iii@linux.ibm.com>
While qemu-system can set tb-size using -accel tcg,tb-size=3Dn, there
is no similar knob for qemu-user. Add one in a way similar to how
one-insn-per-tb is already handled.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daud=C3=A9 <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20240730215532.1442-1-iii@linux.ibm.com>
---
linux-user/main.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/linux-user/main.c b/linux-user/main.c
index 5c74c52cc5..e2ec5970be 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -72,6 +72,7 @@ char *exec_path;
char real_exec_path[PATH_MAX];
=20
static bool opt_one_insn_per_tb;
+static unsigned long opt_tb_size;
static const char *argv0;
static const char *gdbstub;
static envlist_t *envlist;
@@ -425,6 +426,13 @@ static void handle_arg_one_insn_per_tb(const char *arg)
opt_one_insn_per_tb =3D true;
}
=20
+static void handle_arg_tb_size(const char *arg)
+{
+ if (qemu_strtoul(arg, NULL, 0, &opt_tb_size)) {
+ usage(EXIT_FAILURE);
+ }
+}
+
static void handle_arg_strace(const char *arg)
{
enable_strace =3D true;
@@ -517,6 +525,8 @@ static const struct qemu_argument arg_table[] =3D {
{"one-insn-per-tb",
"QEMU_ONE_INSN_PER_TB", false, handle_arg_one_insn_per=
_tb,
"", "run with one guest instruction per emulated TB"},
+ {"tb-size", "QEMU_TB_SIZE", true, handle_arg_tb_size,
+ "size", "TCG translation block cache size"},
{"strace", "QEMU_STRACE", false, handle_arg_strace,
"", "log system calls"},
{"seed", "QEMU_RAND_SEED", true, handle_arg_seed,
@@ -808,6 +818,8 @@ int main(int argc, char **argv, char **envp)
accel_init_interfaces(ac);
object_property_set_bool(OBJECT(accel), "one-insn-per-tb",
opt_one_insn_per_tb, &error_abort);
+ object_property_set_int(OBJECT(accel), "tb-size",
+ opt_tb_size, &error_abort);
ac->init_machine(NULL);
}
=20
--=20
2.43.0