[Xen-devel] Re: [PATCH V2 3/3] vl.c: Check the asked ram_size later.

[Alexander Graf <agraf@xxxxxxx>]

On 07/20/2011 08:17 PM, Anthony PERARD wrote:
> As a Xen guest can have more than 2GB of RAM on a 32bit host, we move
> the conditions after than we now if we run one Xen or not.
>
> Signed-off-by: Anthony PERARD<anthony.perard@xxxxxxxxxx>
> ---
>   vl.c |   14 ++++++++------
>   1 files changed, 8 insertions(+), 6 deletions(-)
>
> diff --git a/vl.c b/vl.c
> index fcd7395..c2efedf 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2433,11 +2433,6 @@ int main(int argc, char **argv, char **envp)
>                       exit(1);
>                   }
>
> -                /* On 32-bit hosts, QEMU is limited by virtual address space */
> -                if (value>  (2047<<  20)&&  HOST_LONG_BITS == 32) {
> -                    fprintf(stderr, "qemu: at most 2047 MB RAM can be 
> simulated\n");
> -                    exit(1);
> -                }
>                   if (value != (uint64_t)(ram_addr_t)value) {
>                       fprintf(stderr, "qemu: ram size too large\n");
>                       exit(1);
> @@ -3091,8 +3086,15 @@ int main(int argc, char **argv, char **envp)
>           exit(1);
>
>       /* init the memory */
> -    if (ram_size == 0)
> +    if (ram_size == 0) {
>           ram_size = DEFAULT_RAM_SIZE * 1024 * 1024;
> +    } else if (!xen_enabled()) {
I don't see why those are mutually exclusive.

> +        /* On 32-bit hosts, QEMU is limited by virtual address space */
> +        if (ram_size>  (2047<<  20)&&  HOST_LONG_BITS == 32) {
> +            fprintf(stderr, "qemu: at most 2047 MB RAM can be simulated\n");
> +            exit(1);
> +        }
> +    }
>
>       /* init the dynamic translator */
>       cpu_exec_init_all(tb_size * 1024 * 1024);
Alex


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