Re: [Qemu-devel] [PATCH 03/16] vl: convert -m to qemu_opts_parse()

[Igor Mammedov <imammedo@redhat.com>]

On Tue, 23 Jul 2013 19:11:31 +0200
Paolo Bonzini <pbonzini@redhat.com> wrote:

> Il 23/07/2013 18:22, Igor Mammedov ha scritto:
> > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> > ---
> >  qemu-options.hx |    9 +++++++--
> >  vl.c            |   53 +++++++++++++++++++++++++++++++++++++++++++++++------
> >  2 files changed, 54 insertions(+), 8 deletions(-)
> > 
> > diff --git a/qemu-options.hx b/qemu-options.hx
> > index 137a39b..f799b3d 100644
> > --- a/qemu-options.hx
> > +++ b/qemu-options.hx
> > @@ -210,8 +210,13 @@ use is discouraged as it may be removed from future versions.
> >  ETEXI
> >  
> >  DEF("m", HAS_ARG, QEMU_OPTION_m,
> > -    "-m megs         set virtual RAM size to megs MB [default="
> > -    stringify(DEFAULT_RAM_SIZE) "]\n", QEMU_ARCH_ALL)
> > +    "-m [mem=]megs[,slots=n,maxmem=size]\n"
> > +    "                set virtual RAM size to megs MB [default="
> > +    stringify(DEFAULT_RAM_SIZE) "]\n"
> > +    "                mem=start-up memory amount\n"
> > +    "                slots=maximum number of hotplug slots\n"
> > +    "                maxmem=maximum total amount of memory\n",
> > +    QEMU_ARCH_ALL)
> >  STEXI
> >  @item -m @var{megs}
> >  @findex -m
> > diff --git a/vl.c b/vl.c
> > index bf0c658..16c6f1e 100644
> > --- a/vl.c
> > +++ b/vl.c
> > @@ -516,6 +516,27 @@ static QemuOptsList qemu_realtime_opts = {
> >      },
> >  };
> >  
> > +static QemuOptsList qemu_mem_opts = {
> > +    .name = "memory-opts",
> > +    .implied_opt_name = "mem",
> > +    .head = QTAILQ_HEAD_INITIALIZER(qemu_mem_opts.head),
> 
> This should have
> 
>     .merge_lists = true,

Just to clarify: is it to allow syntax like?
 -m 512 -m slots=X -m maxmem=Y

> 
> Paolo
> 
> > +    .desc = {
> > +        {
> > +            .name = "mem",
> > +            .type = QEMU_OPT_SIZE,
> > +        },
> > +        {
> > +            .name = "slots",
> > +            .type = QEMU_OPT_NUMBER,
> > +        },
> > +        {
> > +            .name = "maxmem",
> > +            .type = QEMU_OPT_SIZE,
> > +        },
> > +        { /* end of list */ }
> > +    },
> > +};
> > +
> >  const char *qemu_get_vm_name(void)
> >  {
> >      return qemu_name;
> > @@ -2933,6 +2954,7 @@ int main(int argc, char **argv, char **envp)
> >      qemu_add_opts(&qemu_object_opts);
> >      qemu_add_opts(&qemu_tpmdev_opts);
> >      qemu_add_opts(&qemu_realtime_opts);
> > +    qemu_add_opts(&qemu_mem_opts);
> >  
> >      runstate_init();
> >  
> > @@ -3224,21 +3246,40 @@ int main(int argc, char **argv, char **envp)
> >                  exit(0);
> >                  break;
> >              case QEMU_OPTION_m: {
> > -                int64_t value;
> >                  uint64_t sz;
> > -                char *end;
> > +                const char *end;
> > +                char *s;
> >  
> > -                value = strtosz(optarg, &end);
> > -                if (value < 0 || *end) {
> > -                    fprintf(stderr, "qemu: invalid ram size: %s\n", optarg);
> > +                opts = qemu_opts_parse(qemu_find_opts("memory-opts"),
> > +                                       optarg, 1);
> > +                if (!opts) {
> >                      exit(1);
> >                  }
> > -                sz = QEMU_ALIGN_UP((uint64_t)value, 8192);
> > +
> > +                /* fixup legacy sugffix-less format */
> > +                end = qemu_opt_get(opts, "mem");
> > +                if (g_ascii_isdigit(end[strlen(end) - 1])) {
> > +                    s = g_strconcat(end, "M", NULL);
> > +                    qemu_opt_set(opts, "mem", s);
> > +                    g_free(s);
> > +                }
> > +
> > +                sz = QEMU_ALIGN_UP(qemu_opt_get_size(opts, "mem", 0), 8192);
> >                  ram_size = sz;
> >                  if (ram_size != sz) {
> >                      fprintf(stderr, "qemu: ram size too large\n");
> >                      exit(1);
> >                  }
> > +                /* store aligned value for future use */
> > +                s = g_strdup_printf("%" PRIu64, sz);
> > +                qemu_opt_set(opts, "mem", s);
> > +                g_free(s);
> > +
> > +                sz = qemu_opt_get_size(opts, "maxmem", ram_size);
> > +                if (sz < ram_size) {
> > +                    fprintf(stderr, "qemu: maxmem must be > initial memory\n");
> > +                    exit(1);
> > +                }
> >                  break;
> >              }
> >  #ifdef CONFIG_TPM
> > 
> 
>