On Mon, Oct 25, 2021 at 11:47:38AM +0100, Jean-Philippe Brucker wrote:
> Since commit d8fb7d0969d5 ("vl: switch -M parsing to keyval"), machine
> parameter definitions cannot use underscores, because keyval_dashify()
> transforms them to dashes and the parser doesn't find the parameter.
>
> This affects option default_bus_bypass_iommu which was introduced in the
> same release:
>
> $ qemu-system-x86_64 -M q35,default_bus_bypass_iommu=on
> qemu-system-x86_64: Property 'pc-q35-6.1-machine.default-bus-bypass-iommu'
> not found
>
> Rename the parameter to "default-bus-bypass-iommu". Passing
> "default_bus_bypass_iommu" is still valid since the underscore are
> transformed automatically.
>
> Fixes: c9e96b04fc19 ("hw/i386: Add a default_bus_bypass_iommu pc machine
> option")
> Reviewed-by: Eric Auger <eric.au...@redhat.com>
> Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com>
> Tested-by: Eric Auger <eric.au...@redhat.com>
> Signed-off-by: Jean-Philippe Brucker <jean-phili...@linaro.org>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
> ---
> v1:
> https://lore.kernel.org/qemu-devel/20211013160607.649990-3-jean-phili...@linaro.org/
> v2: no change, added review tag and resending to be merged separately
> from the equivalent arm fix
> ---
> hw/i386/pc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/hw/i386/pc.c b/hw/i386/pc.c
> index 86223acfd3..54e4c00dce 100644
> --- a/hw/i386/pc.c
> +++ b/hw/i386/pc.c
> @@ -1718,7 +1718,7 @@ static void pc_machine_class_init(ObjectClass *oc, void
> *data)
> object_class_property_add_bool(oc, "hpet",
> pc_machine_get_hpet, pc_machine_set_hpet);
>
> - object_class_property_add_bool(oc, "default_bus_bypass_iommu",
> + object_class_property_add_bool(oc, "default-bus-bypass-iommu",
> pc_machine_get_default_bus_bypass_iommu,
> pc_machine_set_default_bus_bypass_iommu);
>
> --
> 2.33.0
