Re: [Qemu-devel] [PATCH] qapi: add 'query-target' command to return target arch/bit size (v2)

[Luiz Capitulino <lcapitulino@redhat.com>]

On Wed, 22 Aug 2012 10:09:38 -0500
Anthony Liguori <aliguori@us.ibm.com> wrote:

> From: "Daniel P. Berrange" <berrange@redhat.com>
> 
> Add a 'query-target' QAPI command to allow management applications
> to determine what target architecture a QEMU binary is emulating
> without having to parse the binary name or -help output
> 
>   $ qmp-shell -p /tmp/qemu
>   (QEMU) query-target
>   {   u'return': {   u'arch': u'x86_64' }}
> 
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>

> ---
> v1 -> v2 (aliguori)
>  - remove 'bits' field
>  - switch command to return an enum
> ---
>  arch_init.c      |   11 +++++++++++
>  configure        |    7 ++++++-
>  qapi-schema.json |   39 +++++++++++++++++++++++++++++++++++++++
>  qmp-commands.hx  |    5 +++++
>  4 files changed, 61 insertions(+), 1 deletions(-)
> 
> diff --git a/arch_init.c b/arch_init.c
> index 9b46bfc..5a1173e 100644
> --- a/arch_init.c
> +++ b/arch_init.c
> @@ -44,6 +44,7 @@
>  #include "exec-memory.h"
>  #include "hw/pcspk.h"
>  #include "qemu/page_cache.h"
> +#include "qmp-commands.h"
>  
>  #ifdef DEBUG_ARCH_INIT
>  #define DPRINTF(fmt, ...) \
> @@ -1080,3 +1081,13 @@ int xen_available(void)
>      return 0;
>  #endif
>  }
> +
> +
> +TargetInfo *qmp_query_target(Error **errp)
> +{
> +    TargetInfo *info = g_malloc0(sizeof(*info));
> +
> +    info->arch = TARGET_TYPE;
> +
> +    return info;
> +}
> diff --git a/configure b/configure
> index 60d266f..d97fd81 100755
> --- a/configure
> +++ b/configure
> @@ -3834,14 +3834,19 @@ case "$target_arch2" in
>    ;;
>  esac
>  
> +upper() {
> +    echo "$@"| LC_ALL=C tr '[a-z]' '[A-Z]'
> +}
> +
>  echo "TARGET_SHORT_ALIGNMENT=$target_short_alignment" >> $config_target_mak
>  echo "TARGET_INT_ALIGNMENT=$target_int_alignment" >> $config_target_mak
>  echo "TARGET_LONG_ALIGNMENT=$target_long_alignment" >> $config_target_mak
>  echo "TARGET_LLONG_ALIGNMENT=$target_llong_alignment" >> $config_target_mak
>  echo "TARGET_ARCH=$TARGET_ARCH" >> $config_target_mak
> -target_arch_name="`echo $TARGET_ARCH | LC_ALL=C tr '[a-z]' '[A-Z]'`"
> +target_arch_name="`upper $TARGET_ARCH`"
>  echo "TARGET_$target_arch_name=y" >> $config_target_mak
>  echo "TARGET_ARCH2=$target_arch2" >> $config_target_mak
> +echo "TARGET_TYPE=TARGET_TYPE_`upper $target_arch2`" >> $config_target_mak
>  echo "TARGET_BASE_ARCH=$TARGET_BASE_ARCH" >> $config_target_mak
>  if [ "$TARGET_ABI_DIR" = "" ]; then
>    TARGET_ABI_DIR=$TARGET_ARCH
> diff --git a/qapi-schema.json b/qapi-schema.json
> index 3d2b2d1..72b3c4d 100644
> --- a/qapi-schema.json
> +++ b/qapi-schema.json
> @@ -2454,3 +2454,42 @@
>  #
>  ##
>  { 'command': 'query-fdsets', 'returns': ['FdsetInfo'] }
> +
> +##
> +# @TargetType
> +#
> +# Target CPU emulation type
> +#
> +# These parameters correspond to the softmmu binary CPU name that is currently
> +# running.
> +#
> +# Since: 1.2.0
> +##
> +{ 'enum': 'TargetType',
> +  'data': [ 'alpha', 'arm', 'cris', 'i386', 'lm32', 'm68k', 'microblazeel',
> +            'microblaze', 'mips64el', 'mips64', 'mipsel', 'mips', 'or32',
> +            'ppc64', 'ppcemb', 'ppc', 's390x', 'sh4eb', 'sh4', 'sparc64',
> +            'sparc', 'unicore32', 'x86_64', 'xtensaeb', 'xtensa' ] }
> +
> +##
> +# @TargetInfo:
> +#
> +# Information describing the QEMU target.
> +#
> +# @arch: the target architecture (eg "x86_64", "i386", etc)
> +#
> +# Since: 1.2.0
> +##
> +{ 'type': 'TargetInfo',
> +  'data': { 'arch': 'TargetType' } }
> +
> +##
> +# @query-target:
> +#
> +# Return information about the target for this QEMU
> +#
> +# Returns: TargetInfo
> +#
> +# Since: 1.2.0
> +##
> +{ 'command': 'query-target', 'returns': 'TargetInfo' }
> diff --git a/qmp-commands.hx b/qmp-commands.hx
> index 2ce4ce6..00d798f 100644
> --- a/qmp-commands.hx
> +++ b/qmp-commands.hx
> @@ -2509,3 +2509,8 @@ EQMP
>          .mhandler.cmd_new = qmp_marshal_input_query_cpu_definitions,
>      },
>  
> +    {
> +        .name       = "query-target",
> +        .args_type  = "",
> +        .mhandler.cmd_new = qmp_marshal_input_query_target,
> +    },