[Qemu-devel] [PATCH v1 0/2] RISC-V: Important fixes for QEMU 2.12

[Qemu-devel] [PATCH v1 0/2] RISC-V: Important fixes for QEMU 2.12

[Michael Clark]

This series includes changes that are considered important.
i.e. correct user-visible bugs that are exercised by common
operations such as -cpu list or -d in_asm

Michael Clark (2):
  RISC-V: Convert cpu definition to future model
  RISC-V: Fix incorrect disassembly for addiw

 disas/riscv.c      |   2 +-
 target/riscv/cpu.c | 123 ++++++++++++++++++++++++++++++-----------------------
 2 files changed, 70 insertions(+), 55 deletions(-)

-- 
2.7.0

[Qemu-devel] [PATCH v1 1/2] RISC-V: Convert cpu definition to future model

[Michael Clark]

- Model borrowed from target/sh4/cpu.c
- Rewrote riscv_cpu_list to use object_class_get_list
- Dropped 'struct RISCVCPUInfo' and used TypeInfo array
- Replaced riscv_cpu_register_types with DEFINE_TYPES
- Marked base class as abstract
- Fixes -cpu list

Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Sagar Karandikar <sagark@eecs.berkeley.edu>
Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Cc: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Michael Clark <mjc@sifive.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
---
 target/riscv/cpu.c | 123 ++++++++++++++++++++++++++++++-----------------------
 1 file changed, 69 insertions(+), 54 deletions(-)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 9de34d7..5a527fb 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -115,6 +115,8 @@ static void riscv_any_cpu_init(Object *obj)
     set_resetvec(env, DEFAULT_RSTVEC);
 }
 
+#if defined(TARGET_RISCV32)
+
 static void rv32gcsu_priv1_09_1_cpu_init(Object *obj)
 {
     CPURISCVState *env = &RISCV_CPU(obj)->env;
@@ -141,6 +143,8 @@ static void rv32imacu_nommu_cpu_init(Object *obj)
     set_resetvec(env, DEFAULT_RSTVEC);
 }
 
+#elif defined(TARGET_RISCV64)
+
 static void rv64gcsu_priv1_09_1_cpu_init(Object *obj)
 {
     CPURISCVState *env = &RISCV_CPU(obj)->env;
@@ -167,20 +171,7 @@ static void rv64imacu_nommu_cpu_init(Object *obj)
     set_resetvec(env, DEFAULT_RSTVEC);
 }
 
-static const RISCVCPUInfo riscv_cpus[] = {
-    { 96, TYPE_RISCV_CPU_ANY,              riscv_any_cpu_init },
-    { 32, TYPE_RISCV_CPU_RV32GCSU_V1_09_1, rv32gcsu_priv1_09_1_cpu_init },
-    { 32, TYPE_RISCV_CPU_RV32GCSU_V1_10_0, rv32gcsu_priv1_10_0_cpu_init },
-    { 32, TYPE_RISCV_CPU_RV32IMACU_NOMMU,  rv32imacu_nommu_cpu_init },
-    { 32, TYPE_RISCV_CPU_SIFIVE_E31,       rv32imacu_nommu_cpu_init },
-    { 32, TYPE_RISCV_CPU_SIFIVE_U34,       rv32gcsu_priv1_10_0_cpu_init },
-    { 64, TYPE_RISCV_CPU_RV64GCSU_V1_09_1, rv64gcsu_priv1_09_1_cpu_init },
-    { 64, TYPE_RISCV_CPU_RV64GCSU_V1_10_0, rv64gcsu_priv1_10_0_cpu_init },
-    { 64, TYPE_RISCV_CPU_RV64IMACU_NOMMU,  rv64imacu_nommu_cpu_init },
-    { 64, TYPE_RISCV_CPU_SIFIVE_E51,       rv64imacu_nommu_cpu_init },
-    { 64, TYPE_RISCV_CPU_SIFIVE_U54,       rv64gcsu_priv1_10_0_cpu_init },
-    { 0, NULL, NULL }
-};
+#endif
 
 static ObjectClass *riscv_cpu_class_by_name(const char *cpu_model)
 {
@@ -366,28 +357,6 @@ static void riscv_cpu_class_init(ObjectClass *c, void *data)
     cc->vmsd = &vmstate_riscv_cpu;
 }
 
-static void cpu_register(const RISCVCPUInfo *info)
-{
-    TypeInfo type_info = {
-        .name = info->name,
-        .parent = TYPE_RISCV_CPU,
-        .instance_size = sizeof(RISCVCPU),
-        .instance_init = info->initfn,
-    };
-
-    type_register(&type_info);
-}
-
-static const TypeInfo riscv_cpu_type_info = {
-    .name = TYPE_RISCV_CPU,
-    .parent = TYPE_CPU,
-    .instance_size = sizeof(RISCVCPU),
-    .instance_init = riscv_cpu_init,
-    .abstract = false,
-    .class_size = sizeof(RISCVCPUClass),
-    .class_init = riscv_cpu_class_init,
-};
-
 char *riscv_isa_string(RISCVCPU *cpu)
 {
     int i;
@@ -403,30 +372,76 @@ char *riscv_isa_string(RISCVCPU *cpu)
     return isa_str;
 }
 
-void riscv_cpu_list(FILE *f, fprintf_function cpu_fprintf)
+typedef struct RISCVCPUListState {
+    fprintf_function cpu_fprintf;
+    FILE *file;
+} RISCVCPUListState;
+
+static gint riscv_cpu_list_compare(gconstpointer a, gconstpointer b)
 {
-    const RISCVCPUInfo *info = riscv_cpus;
+    ObjectClass *class_a = (ObjectClass *)a;
+    ObjectClass *class_b = (ObjectClass *)b;
+    const char *name_a, *name_b;
 
-    while (info->name) {
-        if (info->bit_widths & TARGET_LONG_BITS) {
-            (*cpu_fprintf)(f, "%s\n", info->name);
-        }
-        info++;
-    }
+    name_a = object_class_get_name(class_a);
+    name_b = object_class_get_name(class_b);
+    return strcmp(name_a, name_b);
 }
 
-static void riscv_cpu_register_types(void)
+static void riscv_cpu_list_entry(gpointer data, gpointer user_data)
 {
-    const RISCVCPUInfo *info = riscv_cpus;
+    RISCVCPUListState *s = user_data;
+    const char *typename = object_class_get_name(OBJECT_CLASS(data));
+    int len = strlen(typename) - strlen(RISCV_CPU_TYPE_SUFFIX);
 
-    type_register_static(&riscv_cpu_type_info);
+    (*s->cpu_fprintf)(s->file, "%.*s\n", len, typename);
+}
 
-    while (info->name) {
-        if (info->bit_widths & TARGET_LONG_BITS) {
-            cpu_register(info);
-        }
-        info++;
-    }
+void riscv_cpu_list(FILE *f, fprintf_function cpu_fprintf)
+{
+    RISCVCPUListState s = {
+        .cpu_fprintf = cpu_fprintf,
+        .file = f,
+    };
+    GSList *list;
+
+    list = object_class_get_list(TYPE_RISCV_CPU, false);
+    list = g_slist_sort(list, riscv_cpu_list_compare);
+    g_slist_foreach(list, riscv_cpu_list_entry, &s);
+    g_slist_free(list);
 }
 
-type_init(riscv_cpu_register_types)
+#define DEFINE_CPU(type_name, initfn)      \
+    {                                      \
+        .name = type_name,                 \
+        .parent = TYPE_RISCV_CPU,          \
+        .instance_init = initfn            \
+    }
+
+static const TypeInfo riscv_cpu_type_infos[] = {
+    {
+        .name = TYPE_RISCV_CPU,
+        .parent = TYPE_CPU,
+        .instance_size = sizeof(RISCVCPU),
+        .instance_init = riscv_cpu_init,
+        .abstract = true,
+        .class_size = sizeof(RISCVCPUClass),
+        .class_init = riscv_cpu_class_init,
+    },
+    DEFINE_CPU(TYPE_RISCV_CPU_ANY,              riscv_any_cpu_init),
+#if defined(TARGET_RISCV32)
+    DEFINE_CPU(TYPE_RISCV_CPU_RV32GCSU_V1_09_1, rv32gcsu_priv1_09_1_cpu_init),
+    DEFINE_CPU(TYPE_RISCV_CPU_RV32GCSU_V1_10_0, rv32gcsu_priv1_10_0_cpu_init),
+    DEFINE_CPU(TYPE_RISCV_CPU_RV32IMACU_NOMMU,  rv32imacu_nommu_cpu_init),
+    DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_E31,       rv32imacu_nommu_cpu_init),
+    DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_U34,       rv32gcsu_priv1_10_0_cpu_init)
+#elif defined(TARGET_RISCV64)
+    DEFINE_CPU(TYPE_RISCV_CPU_RV64GCSU_V1_09_1, rv64gcsu_priv1_09_1_cpu_init),
+    DEFINE_CPU(TYPE_RISCV_CPU_RV64GCSU_V1_10_0, rv64gcsu_priv1_10_0_cpu_init),
+    DEFINE_CPU(TYPE_RISCV_CPU_RV64IMACU_NOMMU,  rv64imacu_nommu_cpu_init),
+    DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_E51,       rv64imacu_nommu_cpu_init),
+    DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_U54,       rv64gcsu_priv1_10_0_cpu_init)
+#endif
+};
+
+DEFINE_TYPES(riscv_cpu_type_infos)
-- 
2.7.0

Re: [Qemu-devel] [PATCH v1 1/2] RISC-V: Convert cpu definition to future model

[Richard Henderson]

On 03/28/2018 03:55 AM, Michael Clark wrote:
> - Model borrowed from target/sh4/cpu.c
> - Rewrote riscv_cpu_list to use object_class_get_list
> - Dropped 'struct RISCVCPUInfo' and used TypeInfo array
> - Replaced riscv_cpu_register_types with DEFINE_TYPES
> - Marked base class as abstract
> - Fixes -cpu list
> 
> Cc: Igor Mammedov <imammedo@redhat.com>
> Cc: Sagar Karandikar <sagark@eecs.berkeley.edu>
> Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
> Cc: Palmer Dabbelt <palmer@sifive.com>
> Signed-off-by: Michael Clark <mjc@sifive.com>
> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> Reviewed-by: Igor Mammedov <imammedo@redhat.com>
> ---
>  target/riscv/cpu.c | 123 ++++++++++++++++++++++++++++++-----------------------
>  1 file changed, 69 insertions(+), 54 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~

[Qemu-devel] [PATCH v1 2/2] RISC-V: Fix incorrect disassembly for addiw

[Michael Clark]

This fixes a bug in the disassembler constraints used
to lift instructions into pseudo-instructions, whereby
addiw instructions are always lifted to sext.w instead
of just lifting addiw with a zero immediate.

An associated fix has been made to the metadata used to
machine generate the disseasembler:

https://github.com/michaeljclark/riscv-meta/
commit/4a6b2f3898430768acfe201405224d2ea31e1477

Cc: Sagar Karandikar <sagark@eecs.berkeley.edu>
Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Clark <mjc@sifive.com>
---
 disas/riscv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/disas/riscv.c b/disas/riscv.c
index 3c17501..74ad16e 100644
--- a/disas/riscv.c
+++ b/disas/riscv.c
@@ -600,7 +600,7 @@ static const rvc_constraint rvcc_mv[] = { rvc_imm_eq_zero, rvc_end };
 static const rvc_constraint rvcc_not[] = { rvc_imm_eq_n1, rvc_end };
 static const rvc_constraint rvcc_neg[] = { rvc_rs1_eq_x0, rvc_end };
 static const rvc_constraint rvcc_negw[] = { rvc_rs1_eq_x0, rvc_end };
-static const rvc_constraint rvcc_sext_w[] = { rvc_rs2_eq_x0, rvc_end };
+static const rvc_constraint rvcc_sext_w[] = { rvc_imm_eq_zero, rvc_end };
 static const rvc_constraint rvcc_seqz[] = { rvc_imm_eq_p1, rvc_end };
 static const rvc_constraint rvcc_snez[] = { rvc_rs1_eq_x0, rvc_end };
 static const rvc_constraint rvcc_sltz[] = { rvc_rs2_eq_x0, rvc_end };
-- 
2.7.0

Re: [Qemu-devel] [PATCH v1 2/2] RISC-V: Fix incorrect disassembly for addiw

[Philippe Mathieu-Daudé]

On 03/27/2018 04:55 PM, Michael Clark wrote:
> This fixes a bug in the disassembler constraints used
> to lift instructions into pseudo-instructions, whereby
> addiw instructions are always lifted to sext.w instead
> of just lifting addiw with a zero immediate.
> 
> An associated fix has been made to the metadata used to
> machine generate the disseasembler:
> 
> https://github.com/michaeljclark/riscv-meta/
> commit/4a6b2f3898430768acfe201405224d2ea31e1477
> 
> Cc: Sagar Karandikar <sagark@eecs.berkeley.edu>
> Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
> Cc: Palmer Dabbelt <palmer@sifive.com>
> Cc: Peter Maydell <peter.maydell@linaro.org>
> Signed-off-by: Michael Clark <mjc@sifive.com>

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

> ---
>  disas/riscv.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/disas/riscv.c b/disas/riscv.c
> index 3c17501..74ad16e 100644
> --- a/disas/riscv.c
> +++ b/disas/riscv.c
> @@ -600,7 +600,7 @@ static const rvc_constraint rvcc_mv[] = { rvc_imm_eq_zero, rvc_end };
>  static const rvc_constraint rvcc_not[] = { rvc_imm_eq_n1, rvc_end };
>  static const rvc_constraint rvcc_neg[] = { rvc_rs1_eq_x0, rvc_end };
>  static const rvc_constraint rvcc_negw[] = { rvc_rs1_eq_x0, rvc_end };
> -static const rvc_constraint rvcc_sext_w[] = { rvc_rs2_eq_x0, rvc_end };
> +static const rvc_constraint rvcc_sext_w[] = { rvc_imm_eq_zero, rvc_end };
>  static const rvc_constraint rvcc_seqz[] = { rvc_imm_eq_p1, rvc_end };
>  static const rvc_constraint rvcc_snez[] = { rvc_rs1_eq_x0, rvc_end };
>  static const rvc_constraint rvcc_sltz[] = { rvc_rs2_eq_x0, rvc_end };
> 

Re: [Qemu-devel] [PATCH v1 2/2] RISC-V: Fix incorrect disassembly for addiw

[Richard Henderson]

On 03/28/2018 03:55 AM, Michael Clark wrote:
> This fixes a bug in the disassembler constraints used
> to lift instructions into pseudo-instructions, whereby
> addiw instructions are always lifted to sext.w instead
> of just lifting addiw with a zero immediate.
> 
> An associated fix has been made to the metadata used to
> machine generate the disseasembler:
> 
> https://github.com/michaeljclark/riscv-meta/
> commit/4a6b2f3898430768acfe201405224d2ea31e1477
> 
> Cc: Sagar Karandikar <sagark@eecs.berkeley.edu>
> Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
> Cc: Palmer Dabbelt <palmer@sifive.com>
> Cc: Peter Maydell <peter.maydell@linaro.org>
> Signed-off-by: Michael Clark <mjc@sifive.com>
> ---
>  disas/riscv.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~

Re: [Qemu-devel] [PATCH v1 0/2] RISC-V: Important fixes for QEMU 2.12

[no-reply]

Hi,

This series failed docker-build@min-glib build test. Please find the testing commands and
their output below. If you have Docker installed, you can probably reproduce it
locally.

Type: series
Message-id: 1522180547-22956-1-git-send-email-mjc@sifive.com
Subject: [Qemu-devel] [PATCH v1 0/2] RISC-V: Important fixes for QEMU 2.12

=== TEST SCRIPT BEGIN ===
#!/bin/bash
set -e
git submodule update --init dtc
# Let docker tests dump environment info
export SHOW_ENV=1
export J=8
time make docker-test-build@min-glib
=== TEST SCRIPT END ===

Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
Switched to a new branch 'test'
a344370d6f RISC-V: Fix incorrect disassembly for addiw
bd710df094 RISC-V: Convert cpu definition to future model

=== OUTPUT BEGIN ===
Submodule 'dtc' (git://git.qemu-project.org/dtc.git) registered for path 'dtc'
Cloning into '/var/tmp/patchew-tester-tmp-67j32joq/src/dtc'...
Submodule path 'dtc': checked out 'e54388015af1fb4bf04d0bca99caba1074d9cc42'
  BUILD   min-glib
make[1]: Entering directory '/var/tmp/patchew-tester-tmp-67j32joq/src'
  GEN     /var/tmp/patchew-tester-tmp-67j32joq/src/docker-src.2018-03-31-03.33.27.19434/qemu.tar
Cloning into '/var/tmp/patchew-tester-tmp-67j32joq/src/docker-src.2018-03-31-03.33.27.19434/qemu.tar.vroot'...
done.
Checking out files:  41% (2529/6066)   
Checking out files:  42% (2548/6066)   
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Checking out files: 100% (6066/6066)   
Checking out files: 100% (6066/6066), done.
Your branch is up-to-date with 'origin/test'.
Submodule 'dtc' (git://git.qemu-project.org/dtc.git) registered for path 'dtc'
Cloning into '/var/tmp/patchew-tester-tmp-67j32joq/src/docker-src.2018-03-31-03.33.27.19434/qemu.tar.vroot/dtc'...
Submodule path 'dtc': checked out 'e54388015af1fb4bf04d0bca99caba1074d9cc42'
Submodule 'ui/keycodemapdb' (git://git.qemu.org/keycodemapdb.git) registered for path 'ui/keycodemapdb'
Cloning into '/var/tmp/patchew-tester-tmp-67j32joq/src/docker-src.2018-03-31-03.33.27.19434/qemu.tar.vroot/ui/keycodemapdb'...
Submodule path 'ui/keycodemapdb': checked out '6b3d716e2b6472eb7189d3220552280ef3d832ce'
tar: /var/tmp/patchew-tester-tmp-67j32joq/src/docker-src.2018-03-31-03.33.27.19434/qemu.tar: Wrote only 4096 of 10240 bytes
tar: Error is not recoverable: exiting now
failed to create tar file
  COPY    RUNNER
    RUN test-build in qemu:min-glib 
tar: Unexpected EOF in archive
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now
/var/tmp/qemu/run: line 32: prep_fail: command not found
Environment variables:
HOSTNAME=244a59dbb6c9
MAKEFLAGS= -j8
J=8
CCACHE_DIR=/var/tmp/ccache
EXTRA_CONFIGURE_OPTS=
V=
SHOW_ENV=1
PATH=/usr/lib/ccache:/usr/lib64/ccache:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
PWD=/
TARGET_LIST=
SHLVL=1
HOME=/root
TEST_DIR=/tmp/qemu-test
FEATURES= dtc
DEBUG=
_=/usr/bin/env

/var/tmp/qemu/run: line 52: cd: /tmp/qemu-test/src/tests/docker: No such file or directory
/var/tmp/qemu/run: line 57: /test-build: No such file or directory
/var/tmp/qemu/run: line 57: exec: /test-build: cannot execute: No such file or directory
Traceback (most recent call last):
  File "./tests/docker/docker.py", line 407, in <module>
    sys.exit(main())
  File "./tests/docker/docker.py", line 404, in main
    return args.cmdobj.run(args, argv)
  File "./tests/docker/docker.py", line 261, in run
    return Docker().run(argv, args.keep, quiet=args.quiet)
  File "./tests/docker/docker.py", line 229, in run
    quiet=quiet)
  File "./tests/docker/docker.py", line 147, in _do_check
    return subprocess.check_call(self._command + cmd, **kwargs)
  File "/usr/lib64/python2.7/subprocess.py", line 186, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['docker', 'run', '--label', 'com.qemu.instance.uuid=d9be002a34b511e891df52540069c830', '-u', '0', '--security-opt', 'seccomp=unconfined', '--rm', '--net=none', '-e', 'TARGET_LIST=', '-e', 'EXTRA_CONFIGURE_OPTS=', '-e', 'V=', '-e', 'J=8', '-e', 'DEBUG=', '-e', 'SHOW_ENV=1', '-e', 'CCACHE_DIR=/var/tmp/ccache', '-v', '/root/.cache/qemu-docker-ccache:/var/tmp/ccache:z', '-v', '/var/tmp/patchew-tester-tmp-67j32joq/src/docker-src.2018-03-31-03.33.27.19434:/var/tmp/qemu:z,ro', 'qemu:min-glib', '/var/tmp/qemu/run', 'test-build']' returned non-zero exit status 126
make[1]: *** [tests/docker/Makefile.include:129: docker-run] Error 1
make[1]: Leaving directory '/var/tmp/patchew-tester-tmp-67j32joq/src'
make: *** [tests/docker/Makefile.include:163: docker-run-test-build@min-glib] Error 2

real	0m34.239s
user	0m9.557s
sys	0m6.924s
=== OUTPUT END ===

Test command exited with code: 2


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