Re: [Qemu-devel] [PATCH v2 10/10] cpu/topology: replace smp global variables with smp machine properties

[Alistair Francis <alistair23@gmail.com>]

On Mon, May 6, 2019 at 1:35 AM Like Xu <like.xu@linux.intel.com> wrote:
>
> At the end of this smp refactoring series, the global ones are removed
> and only smp machine properties are fully applied and enabled.
>
> Signed-off-by: Like Xu <like.xu@linux.intel.com>

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

Alistair

> ---
>  vl.c | 53 ++++++++++++++++++++++++++---------------------------
>  1 file changed, 26 insertions(+), 27 deletions(-)
>
> diff --git a/vl.c b/vl.c
> index 34f05b2..a3e426c 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -162,10 +162,6 @@ static Chardev **serial_hds;
>  Chardev *parallel_hds[MAX_PARALLEL_PORTS];
>  int win2k_install_hack = 0;
>  int singlestep = 0;
> -int smp_cpus;
> -unsigned int max_cpus;
> -int smp_cores = 1;
> -int smp_threads = 1;
>  int acpi_enabled = 1;
>  int no_hpet = 0;
>  int fd_bootchk = 1;
> @@ -1282,8 +1278,9 @@ static void smp_parse(QemuOpts *opts)
>                  sockets = sockets > 0 ? sockets : 1;
>                  cpus = cores * threads * sockets;
>              } else {
> -                max_cpus = qemu_opt_get_number(opts, "maxcpus", cpus);
> -                sockets = max_cpus / (cores * threads);
> +                current_machine->smp.max_cpus =
> +                        qemu_opt_get_number(opts, "maxcpus", cpus);
> +                sockets = current_machine->smp.max_cpus / (cores * threads);
>              }
>          } else if (cores == 0) {
>              threads = threads > 0 ? threads : 1;
> @@ -1300,34 +1297,37 @@ static void smp_parse(QemuOpts *opts)
>              exit(1);
>          }
>
> -        max_cpus = qemu_opt_get_number(opts, "maxcpus", cpus);
> +        current_machine->smp.max_cpus =
> +                qemu_opt_get_number(opts, "maxcpus", cpus);
>
> -        if (max_cpus < cpus) {
> +        if (current_machine->smp.max_cpus < cpus) {
>              error_report("maxcpus must be equal to or greater than smp");
>              exit(1);
>          }
>
> -        if (sockets * cores * threads > max_cpus) {
> +        if (sockets * cores * threads > current_machine->smp.max_cpus) {
>              error_report("cpu topology: "
>                           "sockets (%u) * cores (%u) * threads (%u) > "
>                           "maxcpus (%u)",
> -                         sockets, cores, threads, max_cpus);
> +                         sockets, cores, threads,
> +                         current_machine->smp.max_cpus);
>              exit(1);
>          }
>
> -        if (sockets * cores * threads != max_cpus) {
> +        if (sockets * cores * threads != current_machine->smp.max_cpus) {
>              warn_report("Invalid CPU topology deprecated: "
>                          "sockets (%u) * cores (%u) * threads (%u) "
>                          "!= maxcpus (%u)",
> -                        sockets, cores, threads, max_cpus);
> +                        sockets, cores, threads,
> +                        current_machine->smp.max_cpus);
>          }
>
> -        smp_cpus = cpus;
> -        smp_cores = cores;
> -        smp_threads = threads;
> +        current_machine->smp.cpus = cpus;
> +        current_machine->smp.cores = cores;
> +        current_machine->smp.threads = threads;
>      }
>
> -    if (smp_cpus > 1) {
> +    if (current_machine->smp.cpus > 1) {
>          Error *blocker = NULL;
>          error_setg(&blocker, QERR_REPLAY_NOT_SUPPORTED, "smp");
>          replay_add_blocker(blocker);
> @@ -4094,26 +4094,25 @@ int main(int argc, char **argv, char **envp)
>      machine_class->default_cpus = machine_class->default_cpus ?: 1;
>
>      /* default to machine_class->default_cpus */
> -    smp_cpus = machine_class->default_cpus;
> -    max_cpus = machine_class->default_cpus;
> +    current_machine->smp.cpus = machine_class->default_cpus;
> +    current_machine->smp.max_cpus = machine_class->default_cpus;
> +    current_machine->smp.cores = 1;
> +    current_machine->smp.threads = 1;
>
>      smp_parse(qemu_opts_find(qemu_find_opts("smp-opts"), NULL));
>
> -    current_machine->smp.cpus = smp_cpus;
> -    current_machine->smp.max_cpus = max_cpus;
> -    current_machine->smp.cores = smp_cores;
> -    current_machine->smp.threads = smp_threads;
> -
>      /* sanity-check smp_cpus and max_cpus against machine_class */
> -    if (smp_cpus < machine_class->min_cpus) {
> +    if (current_machine->smp.cpus < machine_class->min_cpus) {
>          error_report("Invalid SMP CPUs %d. The min CPUs "
> -                     "supported by machine '%s' is %d", smp_cpus,
> +                     "supported by machine '%s' is %d",
> +                     current_machine->smp.cpus,
>                       machine_class->name, machine_class->min_cpus);
>          exit(1);
>      }
> -    if (max_cpus > machine_class->max_cpus) {
> +    if (current_machine->smp.max_cpus > machine_class->max_cpus) {
>          error_report("Invalid SMP CPUs %d. The max CPUs "
> -                     "supported by machine '%s' is %d", max_cpus,
> +                     "supported by machine '%s' is %d",
> +                     current_machine->smp.max_cpus,
>                       machine_class->name, machine_class->max_cpus);
>          exit(1);
>      }
> --
> 1.8.3.1
>