Add RISC-V semihosting support

[PATCH 1/4] semihosting: Move ARM semihosting code to shared directories [v3]

Posted by Keith Packard via 5 years, 3 months ago

This commit renames two files which provide ARM semihosting support so
that they can be shared by other architectures:

 1. target/arm/arm-semi.c     -> hw/semihosting/common-semi.c
 2. linux-user/arm/semihost.c -> linux-user/semihost.c

The build system was modified use a new config variable,
CONFIG_ARM_COMPATIBLE_SEMIHOSTING, which has been added to the ARM
softmmu and linux-user default configs. The contents of the source
files has not been changed in this patch.

Signed-off-by: Keith Packard <keithp@keithp.com>

----

v2
	Place common-semi.c name in arm_ss, just as arm-semi.c was

v3
	Create CONFIG_ARM_COMPATIBLE_SEMIHOSTING and assign in
	arm config files
---
 default-configs/devices/arm-softmmu.mak               | 1 +
 default-configs/targets/aarch64-linux-user.mak        | 1 +
 default-configs/targets/arm-linux-user.mak            | 1 +
 hw/semihosting/Kconfig                                | 3 +++
 target/arm/arm-semi.c => hw/semihosting/common-semi.c | 0
 hw/semihosting/meson.build                            | 3 +++
 linux-user/arm/meson.build                            | 3 ---
 linux-user/meson.build                                | 1 +
 linux-user/{arm => }/semihost.c                       | 0
 target/arm/meson.build                                | 2 --
 10 files changed, 10 insertions(+), 5 deletions(-)
 rename target/arm/arm-semi.c => hw/semihosting/common-semi.c (100%)
 rename linux-user/{arm => }/semihost.c (100%)

diff --git a/default-configs/devices/arm-softmmu.mak b/default-configs/devices/arm-softmmu.mak
index 08a32123b4..0500156a0c 100644
--- a/default-configs/devices/arm-softmmu.mak
+++ b/default-configs/devices/arm-softmmu.mak
@@ -42,4 +42,5 @@ CONFIG_FSL_IMX25=y
 CONFIG_FSL_IMX7=y
 CONFIG_FSL_IMX6UL=y
 CONFIG_SEMIHOSTING=y
+CONFIG_ARM_COMPATIBLE_SEMIHOSTING=y
 CONFIG_ALLWINNER_H3=y
diff --git a/default-configs/targets/aarch64-linux-user.mak b/default-configs/targets/aarch64-linux-user.mak
index 163c9209f4..4713253709 100644
--- a/default-configs/targets/aarch64-linux-user.mak
+++ b/default-configs/targets/aarch64-linux-user.mak
@@ -2,3 +2,4 @@ TARGET_ARCH=aarch64
 TARGET_BASE_ARCH=arm
 TARGET_XML_FILES= gdb-xml/aarch64-core.xml gdb-xml/aarch64-fpu.xml gdb-xml/arm-core.xml gdb-xml/arm-vfp.xml gdb-xml/arm-vfp3.xml gdb-xml/arm-neon.xml gdb-xml/arm-m-profile.xml
 TARGET_HAS_BFLT=y
+CONFIG_ARM_COMPATIBLE_SEMIHOSTING=y
diff --git a/default-configs/targets/arm-linux-user.mak b/default-configs/targets/arm-linux-user.mak
index c7cd872e86..e741ffd4d3 100644
--- a/default-configs/targets/arm-linux-user.mak
+++ b/default-configs/targets/arm-linux-user.mak
@@ -3,3 +3,4 @@ TARGET_SYSTBL_ABI=common,oabi
 TARGET_SYSTBL=syscall.tbl
 TARGET_XML_FILES= gdb-xml/arm-core.xml gdb-xml/arm-vfp.xml gdb-xml/arm-vfp3.xml gdb-xml/arm-neon.xml gdb-xml/arm-m-profile.xml
 TARGET_HAS_BFLT=y
+CONFIG_ARM_COMPATIBLE_SEMIHOSTING=y
diff --git a/hw/semihosting/Kconfig b/hw/semihosting/Kconfig
index efe0a30734..4c30dc6b16 100644
--- a/hw/semihosting/Kconfig
+++ b/hw/semihosting/Kconfig
@@ -1,3 +1,6 @@
 
 config SEMIHOSTING
        bool
+
+config ARM_COMPATIBLE_SEMIHOSTING
+       bool
diff --git a/target/arm/arm-semi.c b/hw/semihosting/common-semi.c
similarity index 100%
rename from target/arm/arm-semi.c
rename to hw/semihosting/common-semi.c
diff --git a/hw/semihosting/meson.build b/hw/semihosting/meson.build
index f40ac574c4..5b4a170270 100644
--- a/hw/semihosting/meson.build
+++ b/hw/semihosting/meson.build
@@ -2,3 +2,6 @@ specific_ss.add(when: 'CONFIG_SEMIHOSTING', if_true: files(
   'config.c',
   'console.c',
 ))
+
+specific_ss.add(when: ['CONFIG_ARM_COMPATIBLE_SEMIHOSTING'],
+		if_true: files('common-semi.c'))
diff --git a/linux-user/arm/meson.build b/linux-user/arm/meson.build
index 432984b58e..5a93c925cf 100644
--- a/linux-user/arm/meson.build
+++ b/linux-user/arm/meson.build
@@ -1,6 +1,3 @@
-linux_user_ss.add(when: 'TARGET_AARCH64', if_true: files('semihost.c'))
-linux_user_ss.add(when: 'TARGET_ARM', if_true: files('semihost.c'))
-
 subdir('nwfpe')
 
 syscall_nr_generators += {
diff --git a/linux-user/meson.build b/linux-user/meson.build
index 2b94e4ba24..7fe28d659e 100644
--- a/linux-user/meson.build
+++ b/linux-user/meson.build
@@ -16,6 +16,7 @@ linux_user_ss.add(rt)
 
 linux_user_ss.add(when: 'TARGET_HAS_BFLT', if_true: files('flatload.c'))
 linux_user_ss.add(when: 'TARGET_I386', if_true: files('vm86.c'))
+linux_user_ss.add(when: 'CONFIG_ARM_COMPATIBLE_SEMIHOSTING', if_true: files('semihost.c'))
 
 
 syscall_nr_generators = {}
diff --git a/linux-user/arm/semihost.c b/linux-user/semihost.c
similarity index 100%
rename from linux-user/arm/semihost.c
rename to linux-user/semihost.c
diff --git a/target/arm/meson.build b/target/arm/meson.build
index f5de2a77b8..15b936c101 100644
--- a/target/arm/meson.build
+++ b/target/arm/meson.build
@@ -32,8 +32,6 @@ arm_ss.add(files(
 ))
 arm_ss.add(zlib)
 
-arm_ss.add(when: 'CONFIG_TCG', if_true: files('arm-semi.c'))
-
 arm_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c', 'kvm64.c'), if_false: files('kvm-stub.c'))
 
 arm_ss.add(when: 'TARGET_AARCH64', if_true: files(
-- 
2.28.0

Re: [PATCH 1/4] semihosting: Move ARM semihosting code to shared directories [v3]

Posted by Alistair Francis 5 years, 3 months ago

On Wed, Oct 28, 2020 at 11:57 AM Keith Packard via
<qemu-devel@nongnu.org> wrote:
>
> This commit renames two files which provide ARM semihosting support so
> that they can be shared by other architectures:
>
>  1. target/arm/arm-semi.c     -> hw/semihosting/common-semi.c
>  2. linux-user/arm/semihost.c -> linux-user/semihost.c
>
> The build system was modified use a new config variable,
> CONFIG_ARM_COMPATIBLE_SEMIHOSTING, which has been added to the ARM
> softmmu and linux-user default configs. The contents of the source
> files has not been changed in this patch.
>
> Signed-off-by: Keith Packard <keithp@keithp.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

>
> ----
>
> v2
>         Place common-semi.c name in arm_ss, just as arm-semi.c was
>
> v3
>         Create CONFIG_ARM_COMPATIBLE_SEMIHOSTING and assign in
>         arm config files
> ---
>  default-configs/devices/arm-softmmu.mak               | 1 +
>  default-configs/targets/aarch64-linux-user.mak        | 1 +
>  default-configs/targets/arm-linux-user.mak            | 1 +
>  hw/semihosting/Kconfig                                | 3 +++
>  target/arm/arm-semi.c => hw/semihosting/common-semi.c | 0
>  hw/semihosting/meson.build                            | 3 +++
>  linux-user/arm/meson.build                            | 3 ---
>  linux-user/meson.build                                | 1 +
>  linux-user/{arm => }/semihost.c                       | 0
>  target/arm/meson.build                                | 2 --
>  10 files changed, 10 insertions(+), 5 deletions(-)
>  rename target/arm/arm-semi.c => hw/semihosting/common-semi.c (100%)
>  rename linux-user/{arm => }/semihost.c (100%)
>
> diff --git a/default-configs/devices/arm-softmmu.mak b/default-configs/devices/arm-softmmu.mak
> index 08a32123b4..0500156a0c 100644
> --- a/default-configs/devices/arm-softmmu.mak
> +++ b/default-configs/devices/arm-softmmu.mak
> @@ -42,4 +42,5 @@ CONFIG_FSL_IMX25=y
>  CONFIG_FSL_IMX7=y
>  CONFIG_FSL_IMX6UL=y
>  CONFIG_SEMIHOSTING=y
> +CONFIG_ARM_COMPATIBLE_SEMIHOSTING=y
>  CONFIG_ALLWINNER_H3=y
> diff --git a/default-configs/targets/aarch64-linux-user.mak b/default-configs/targets/aarch64-linux-user.mak
> index 163c9209f4..4713253709 100644
> --- a/default-configs/targets/aarch64-linux-user.mak
> +++ b/default-configs/targets/aarch64-linux-user.mak
> @@ -2,3 +2,4 @@ TARGET_ARCH=aarch64
>  TARGET_BASE_ARCH=arm
>  TARGET_XML_FILES= gdb-xml/aarch64-core.xml gdb-xml/aarch64-fpu.xml gdb-xml/arm-core.xml gdb-xml/arm-vfp.xml gdb-xml/arm-vfp3.xml gdb-xml/arm-neon.xml gdb-xml/arm-m-profile.xml
>  TARGET_HAS_BFLT=y
> +CONFIG_ARM_COMPATIBLE_SEMIHOSTING=y
> diff --git a/default-configs/targets/arm-linux-user.mak b/default-configs/targets/arm-linux-user.mak
> index c7cd872e86..e741ffd4d3 100644
> --- a/default-configs/targets/arm-linux-user.mak
> +++ b/default-configs/targets/arm-linux-user.mak
> @@ -3,3 +3,4 @@ TARGET_SYSTBL_ABI=common,oabi
>  TARGET_SYSTBL=syscall.tbl
>  TARGET_XML_FILES= gdb-xml/arm-core.xml gdb-xml/arm-vfp.xml gdb-xml/arm-vfp3.xml gdb-xml/arm-neon.xml gdb-xml/arm-m-profile.xml
>  TARGET_HAS_BFLT=y
> +CONFIG_ARM_COMPATIBLE_SEMIHOSTING=y
> diff --git a/hw/semihosting/Kconfig b/hw/semihosting/Kconfig
> index efe0a30734..4c30dc6b16 100644
> --- a/hw/semihosting/Kconfig
> +++ b/hw/semihosting/Kconfig
> @@ -1,3 +1,6 @@
>
>  config SEMIHOSTING
>         bool
> +
> +config ARM_COMPATIBLE_SEMIHOSTING
> +       bool
> diff --git a/target/arm/arm-semi.c b/hw/semihosting/common-semi.c
> similarity index 100%
> rename from target/arm/arm-semi.c
> rename to hw/semihosting/common-semi.c
> diff --git a/hw/semihosting/meson.build b/hw/semihosting/meson.build
> index f40ac574c4..5b4a170270 100644
> --- a/hw/semihosting/meson.build
> +++ b/hw/semihosting/meson.build
> @@ -2,3 +2,6 @@ specific_ss.add(when: 'CONFIG_SEMIHOSTING', if_true: files(
>    'config.c',
>    'console.c',
>  ))
> +
> +specific_ss.add(when: ['CONFIG_ARM_COMPATIBLE_SEMIHOSTING'],
> +               if_true: files('common-semi.c'))
> diff --git a/linux-user/arm/meson.build b/linux-user/arm/meson.build
> index 432984b58e..5a93c925cf 100644
> --- a/linux-user/arm/meson.build
> +++ b/linux-user/arm/meson.build
> @@ -1,6 +1,3 @@
> -linux_user_ss.add(when: 'TARGET_AARCH64', if_true: files('semihost.c'))
> -linux_user_ss.add(when: 'TARGET_ARM', if_true: files('semihost.c'))
> -
>  subdir('nwfpe')
>
>  syscall_nr_generators += {
> diff --git a/linux-user/meson.build b/linux-user/meson.build
> index 2b94e4ba24..7fe28d659e 100644
> --- a/linux-user/meson.build
> +++ b/linux-user/meson.build
> @@ -16,6 +16,7 @@ linux_user_ss.add(rt)
>
>  linux_user_ss.add(when: 'TARGET_HAS_BFLT', if_true: files('flatload.c'))
>  linux_user_ss.add(when: 'TARGET_I386', if_true: files('vm86.c'))
> +linux_user_ss.add(when: 'CONFIG_ARM_COMPATIBLE_SEMIHOSTING', if_true: files('semihost.c'))
>
>
>  syscall_nr_generators = {}
> diff --git a/linux-user/arm/semihost.c b/linux-user/semihost.c
> similarity index 100%
> rename from linux-user/arm/semihost.c
> rename to linux-user/semihost.c
> diff --git a/target/arm/meson.build b/target/arm/meson.build
> index f5de2a77b8..15b936c101 100644
> --- a/target/arm/meson.build
> +++ b/target/arm/meson.build
> @@ -32,8 +32,6 @@ arm_ss.add(files(
>  ))
>  arm_ss.add(zlib)
>
> -arm_ss.add(when: 'CONFIG_TCG', if_true: files('arm-semi.c'))
> -
>  arm_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c', 'kvm64.c'), if_false: files('kvm-stub.c'))
>
>  arm_ss.add(when: 'TARGET_AARCH64', if_true: files(
> --
> 2.28.0
>
>

Re: [PATCH 1/4] semihosting: Move ARM semihosting code to shared directories [v3]

Posted by Keith Packard via 5 years, 3 months ago

Alistair Francis <alistair23@gmail.com> writes:

> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Thanks much. I think we'll need some help getting the next two patches
reviewed; that touches ARM code. The last patch is also RISC-V only.

-- 
-keith

[PATCH 1/4] semihosting: Move ARM semihosting code to shared directories [v3]
[PATCH 2/4] semihosting: Change common-semi API to be architecture-independent
[PATCH 3/4] semihosting: Change internal common-semi interfaces to use CPUState *
[PATCH 4/4] riscv: Add semihosting support [v11]