-tb-size fits nicely in the new framework for accelerator-specific options. It
is a very niche option, so insta-deprecate it.
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
accel/tcg/tcg-all.c | 40 +++++++++++++++++++++++++++++++++++++---
include/sysemu/accel.h | 2 --
qemu-deprecated.texi | 6 ++++++
qemu-options.hx | 8 ++++++--
vl.c | 8 ++++----
5 files changed, 53 insertions(+), 11 deletions(-)
diff --git a/accel/tcg/tcg-all.c b/accel/tcg/tcg-all.c
index 7829f02..1dc384c 100644
--- a/accel/tcg/tcg-all.c
+++ b/accel/tcg/tcg-all.c
@@ -34,11 +34,13 @@
#include "include/qapi/error.h"
#include "include/qemu/error-report.h"
#include "include/hw/boards.h"
+#include "qapi/qapi-builtin-visit.h"
typedef struct TCGState {
AccelState parent_obj;
bool mttcg_enabled;
+ unsigned long tb_size;
} TCGState;
#define TYPE_TCG_ACCEL ACCEL_CLASS_NAME("tcg")
@@ -46,8 +48,6 @@ typedef struct TCGState {
#define TCG_STATE(obj) \
OBJECT_CHECK(TCGState, (obj), TYPE_TCG_ACCEL)
-unsigned long tcg_tb_size;
-
/* mask must never be zero, except for A20 change call */
static void tcg_handle_interrupt(CPUState *cpu, int mask)
{
@@ -126,7 +126,7 @@ static int tcg_init(MachineState *ms)
{
TCGState *s = TCG_STATE(current_machine->accelerator);
- tcg_exec_init(tcg_tb_size * 1024 * 1024);
+ tcg_exec_init(s->tb_size * 1024 * 1024);
cpu_interrupt_handler = tcg_handle_interrupt;
mttcg_enabled = s->mttcg_enabled;
return 0;
@@ -167,6 +167,33 @@ static void tcg_set_thread(Object *obj, const char *value,
Error **errp)
}
}
+static void tcg_get_tb_size(Object *obj, Visitor *v,
+ const char *name, void *opaque,
+ Error **errp)
+{
+ TCGState *s = TCG_STATE(obj);
+ uint32_t value = s->tb_size;
+
+ visit_type_uint32(v, name, &value, errp);
+}
+
+static void tcg_set_tb_size(Object *obj, Visitor *v,
+ const char *name, void *opaque,
+ Error **errp)
+{
+ TCGState *s = TCG_STATE(obj);
+ Error *error = NULL;
+ uint32_t value;
+
+ visit_type_uint32(v, name, &value, &error);
+ if (error) {
+ error_propagate(errp, error);
+ return;
+ }
+
+ s->tb_size = value;
+}
+
static void tcg_accel_class_init(ObjectClass *oc, void *data)
{
AccelClass *ac = ACCEL_CLASS(oc);
@@ -178,6 +205,13 @@ static void tcg_accel_class_init(ObjectClass *oc, void
*data)
tcg_get_thread,
tcg_set_thread,
NULL);
+
+ object_class_property_add(oc, "tb-size", "int",
+ tcg_get_tb_size, tcg_set_tb_size,
+ NULL, NULL, &error_abort);
+ object_class_property_set_description(oc, "tb-size",
+ "TCG translation block cache size", &error_abort);
+
}
static const TypeInfo tcg_accel_type = {
diff --git a/include/sysemu/accel.h b/include/sysemu/accel.h
index 22cac0f..d4c1429 100644
--- a/include/sysemu/accel.h
+++ b/include/sysemu/accel.h
@@ -64,8 +64,6 @@ typedef struct AccelClass {
#define ACCEL_GET_CLASS(obj) \
OBJECT_GET_CLASS(AccelClass, (obj), TYPE_ACCEL)
-extern unsigned long tcg_tb_size;
-
AccelClass *accel_find(const char *opt_name);
int accel_init_machine(AccelState *accel, MachineState *ms);
diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi
index 4b4b742..487d2b4 100644
--- a/qemu-deprecated.texi
+++ b/qemu-deprecated.texi
@@ -147,6 +147,12 @@ QEMU 4.1 has three options, please migrate to one of these
three:
to do is specify the kernel they want to boot with the -kernel option
3. ``-bios <file>`` - Tells QEMU to load the specified file as the firmwrae.
+@subsection -tb-size option (since 5.0)
+
+QEMU 5.0 introduced an alternative syntax to specify the size of the
translation
+block cache, @option{-accel tcg,tb-size=}. The new syntax deprecates the
+previously available @option{-tb-size} option.
+
@section QEMU Machine Protocol (QMP) commands
@subsection change (since 2.5.0)
diff --git a/qemu-options.hx b/qemu-options.hx
index 65c9473..9775258 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -118,8 +118,9 @@ Select CPU model (@code{-cpu help} for list and additional
feature selection)
ETEXI
DEF("accel", HAS_ARG, QEMU_OPTION_accel,
- "-accel [accel=]accelerator[,thread=single|multi]\n"
+ "-accel [accel=]accelerator[,prop[=value][,...]]\n"
" select accelerator (kvm, xen, hax, hvf, whpx or tcg; use
'help' for a list)\n"
+ " tb-size=n (TCG translation block cache size)\n"
" thread=single|multi (enable multi-threaded TCG)\n",
QEMU_ARCH_ALL)
STEXI
@item -accel @var{name}[,prop=@var{value}[,...]]
@@ -129,6 +130,8 @@ kvm, xen, hax, hvf, whpx or tcg can be available. By
default, tcg is used. If th
more than one accelerator specified, the next one is used if the previous one
fails to initialize.
@table @option
+@item tb-size=@var{n}
+Controls the size (in MiB) of the TCG translation block cache.
@item thread=single|multi
Controls number of TCG threads. When the TCG is multi-threaded there will be
one
thread per vCPU therefor taking advantage of additional host cores. The default
@@ -4012,7 +4015,8 @@ DEF("tb-size", HAS_ARG, QEMU_OPTION_tb_size, \
STEXI
@item -tb-size @var{n}
@findex -tb-size
-Set TB size.
+Set TCG translation block cache size. Deprecated, use @samp{-accel
tcg,tb-size=@var{n}}
+instead.
ETEXI
DEF("incoming", HAS_ARG, QEMU_OPTION_incoming, \
diff --git a/vl.c b/vl.c
index b6c23d1..e6ff56b 100644
--- a/vl.c
+++ b/vl.c
@@ -2852,6 +2852,7 @@ static int do_configure_accelerator(void *opaque,
QemuOpts *opts, Error **errp)
return 0;
}
accel = ACCEL(object_new_with_class(OBJECT_CLASS(ac)));
+ object_apply_compat_props(OBJECT(accel));
qemu_opt_foreach(opts, accelerator_set_property,
accel,
&error_fatal);
@@ -2863,6 +2864,7 @@ static int do_configure_accelerator(void *opaque,
QemuOpts *opts, Error **errp)
acc, strerror(-ret));
return 0;
}
+
return 1;
}
@@ -3745,10 +3747,8 @@ int main(int argc, char **argv, char **envp)
error_report("TCG is disabled");
exit(1);
#endif
- if (qemu_strtoul(optarg, NULL, 0, &tcg_tb_size) < 0) {
- error_report("Invalid argument to -tb-size");
- exit(1);
- }
+ warn_report("The -tb-size option is deprecated, use -accel
tcg,tb-size instead");
+ object_register_sugar_prop(ACCEL_CLASS_NAME("tcg"), "tb-size",
optarg);
break;
case QEMU_OPTION_icount:
icount_opts = qemu_opts_parse_noisily(qemu_find_opts("icount"),
--
1.8.3.1
