On Wed, 2008-02-13 at 09:29 +0200, Avi Kivity wrote:
> Jerone Young wrote:
> > So the recent code in qemu cvs has problem powerpc. So what I have done
> > is mainly work around this in the build system, by creating
> > ppcemb_kvm-sofmmu target. Along with this is a fake-exec.c that stubs
> > out the functions that are no longer defined (something done by Anthony
> > Liguori attempting to fix qemu_cvs). What do folks think about this
> > approach, for us all we really need is a qemu that is not built with tcg
> > dependency.
> >
> >
>
> Since a target in qemu is a cpu type, how the instructions are executed
> (kvm, kqemu, dyngen, or tcg) shouldn't come into it. Instead we can
> have a --without-cpu-emulation or --no-tcg which would simply disable
> those parts.
Actually this much much more sensible solution. So I took some time and
implemented it.
So on the qemu command line you use "--disable-cpu-emulation"
Signed-off-by: Jerone Young <[EMAIL PROTECTED]>
diff --git a/qemu/Makefile.target b/qemu/Makefile.target
--- a/qemu/Makefile.target
+++ b/qemu/Makefile.target
@@ -179,11 +179,17 @@ all: $(PROGS)
#########################################################
# cpu emulator library
-LIBOBJS=exec.o kqemu.o translate-all.o cpu-exec.o\
- translate.o op.o host-utils.o
+LIBOBJS=exec.o kqemu.o cpu-exec.o host-utils.o
+
+ifneq ($(NO_CPU_EMULATION), 1)
+LIBOBJS+= translate-all.o translate.o op.o
# TCG code generator
LIBOBJS+= tcg/tcg.o tcg/tcg-dyngen.o tcg/tcg-runtime.o
CPPFLAGS+=-I$(SRC_PATH)/tcg -I$(SRC_PATH)/tcg/$(ARCH)
+else
+LIBOBJS+= fake-exec.o
+endif
+
ifeq ($(USE_KVM), 1)
LIBOBJS+=qemu-kvm.o
endif
diff --git a/qemu/configure b/qemu/configure
--- a/qemu/configure
+++ b/qemu/configure
@@ -110,6 +110,7 @@ darwin_user="no"
darwin_user="no"
build_docs="no"
uname_release=""
+cpu_emulation="yes"
# OS specific
targetos=`uname -s`
@@ -339,6 +340,8 @@ for opt do
;;
--disable-werror) werror="no"
;;
+ --disable-cpu-emulation) cpu_emulation="no"
+ ;;
*) echo "ERROR: unknown option $opt"; exit 1
;;
esac
@@ -770,6 +773,7 @@ fi
fi
echo "kqemu support $kqemu"
echo "kvm support $kvm"
+echo "CPU emulation $cpu_emulation"
echo "Documentation $build_docs"
[ ! -z "$uname_release" ] && \
echo "uname -r $uname_release"
@@ -1094,12 +1098,20 @@ interp_prefix1=`echo "$interp_prefix" |
interp_prefix1=`echo "$interp_prefix" | sed "s/%M/$target_cpu/g"`
echo "#define CONFIG_QEMU_PREFIX \"$interp_prefix1\"" >> $config_h
+disable_cpu_emulation() {
+ if test $cpu_emulation = "no"; then
+ echo "#define NO_CPU_EMULATION 1" >> $config_h
+ echo "NO_CPU_EMULATION=1" >> $config_mak
+ fi
+}
+
configure_kvm() {
if test $kvm = "yes" -a "$target_softmmu" = "yes" -a \
\( "$cpu" = "i386" -o "$cpu" = "x86_64" -o "$cpu" = "ia64" -o "$cpu"
= "powerpc" \); then
echo "#define USE_KVM 1" >> $config_h
echo "USE_KVM=1" >> $config_mak
echo "CONFIG_KVM_KERNEL_INC=$kernel_path/include" >> $config_mak
+ disable_cpu_emulation
fi
}
diff --git a/qemu/exec.c b/qemu/exec.c
--- a/qemu/exec.c
+++ b/qemu/exec.c
@@ -35,7 +35,11 @@
#include "cpu.h"
#include "exec-all.h"
+
+#if !defined(NO_CPU_EMULATION)
#include "tcg-target.h"
+#endif
+
#include "qemu-kvm.h"
#if defined(CONFIG_USER_ONLY)
#include <qemu.h>
diff --git a/qemu/fake-exec.c b/qemu/fake-exec.c
new file mode 100644
--- /dev/null
+++ b/qemu/fake-exec.c
@@ -0,0 +1,62 @@
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include "cpu.h"
+#include "exec-all.h"
+
+int code_copy_enabled = 0;
+
+void cpu_dump_state (CPUState *env, FILE *f,
+ int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
+ int flags)
+{
+}
+
+void ppc_cpu_list (FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...))
+{
+}
+
+void cpu_dump_statistics (CPUState *env, FILE*f,
+ int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
+ int flags)
+{
+}
+
+unsigned long code_gen_max_block_size(void)
+{
+ return 32;
+}
+
+void cpu_gen_init(void)
+{
+}
+
+int cpu_restore_state(TranslationBlock *tb,
+ CPUState *env, unsigned long searched_pc,
+ void *puc)
+
+{
+ return 0;
+}
+
+int cpu_ppc_gen_code(CPUState *env, TranslationBlock *tb, int
*gen_code_size_ptr)
+{
+ return 0;
+}
+
+const ppc_def_t *cpu_ppc_find_by_name (const unsigned char *name)
+{
+ return NULL;
+}
+
+int cpu_ppc_register_internal (CPUPPCState *env, const ppc_def_t *def)
+{
+ return 0;
+}
+
+void flush_icache_range(unsigned long start, unsigned long stop)
+{
+}
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