Re: [PATCH for-6.1 v2] machine: Disallow specifying topology parameters as zero

[Cleber Rosa <crosa@redhat.com>]

Yanan Wang writes:

> In the SMP configuration, we should either specify a topology
> parameter with a reasonable value (equal to or greater than 1)
> or just leave it omitted and QEMU will calculate its value.
> Configurations which explicitly specify the topology parameters
> as zero like "sockets=0" are meaningless, so disallow them.
>
> However, the commit 1e63fe685804d
> (machine: pass QAPI struct to mc->smp_parse) has documented that
> '0' has the same semantics as omitting a parameter in the qapi
> comment for SMPConfiguration. So this patch fixes the doc and
> also adds the corresponding sanity check in the smp parsers.
>
> Suggested-by: Andrew Jones <drjones@redhat.com>
> Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
> ---
>  hw/core/machine.c | 14 ++++++++++++++
>  qapi/machine.json |  6 +++---
>  qemu-options.hx   | 12 +++++++-----
>  3 files changed, 24 insertions(+), 8 deletions(-)

Hi Yanan,

This looks somewhat similar to this very old patch of mine:

   https://mail.gnu.org/archive/html/qemu-devel/2020-10/msg03039.html

I'm putting a reference here because I believe the test can be salvaged
and slightly adapted for this patch of yours.

Let me know if I can help anyhow.

Thanks,
- Cleber.