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From: Arnd Bergmann <arnd@kernel.org>
To: Cristian Marussi <cristian.marussi@arm.com>
Cc: kbuild test robot <lkp@intel.com>,
	igor.skalkin@opensynergy.com, kbuild-all@lists.01.org,
	 Linux-MM <linux-mm@kvack.org>,
	Sudeep Holla <sudeep.holla@arm.com>,
	peter.hilber@opensynergy.com
Subject: Re: [PATCH] firmware: arm_scmi: Fix virtio transport Kconfig dependency
Date: Mon, 16 Aug 2021 16:30:10 +0200	[thread overview]
Message-ID: <CAK8P3a3+a5z0DuJ45VVHAm2aa3ELM922kqN0YbkPCCMsK3xQWw@mail.gmail.com> (raw)
In-Reply-To: <20210816141609.41751-1-cristian.marussi@arm.com>

On Mon, Aug 16, 2021 at 4:16 PM Cristian Marussi
<cristian.marussi@arm.com> wrote:
>
> ARM_SCMI_TRANSPORT_VIRTIO is a 'bool' Kconfig used to include support for
> the SCMI virtio transport inside the core SCMI stack; a bare transport
> dependency attached here to this option, though, cannot be properly
> propagated to the parent ARM_SCMI_PROTOCOL option and, as a result, it is
> currently possible to configure a Kernel where SCMI core is builtin
> and includes support for virtio while VirtIO core is =m.
> This allowed combination breaks linking:
>
>         ARM_SCMI_PROTOCOL=y
>         ARM_SCMI_TRANSPORT_VIRTIO=y
>         VIRTIO=m
>
> Bind the dependency in ARM_SCMI_TRANSPORT_VIRTIO to the chosen kind of
> compilation of ARM_SCMI_PROTOCOL.
>
> Reported-by: kernel test robot <lkp@intel.com>
> Suggested-by: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>

The description looks good

Acked-by: Arnd Bergmann <arnd@arndb.de>

> @@ -68,7 +68,7 @@ config ARM_SCMI_TRANSPORT_SMC
>
>  config ARM_SCMI_TRANSPORT_VIRTIO
>         bool "SCMI transport based on VirtIO"
> -       depends on VIRTIO
> +       depends on VIRTIO=y || VIRTIO=ARM_SCMI_PROTOCOL
>         select ARM_SCMI_HAVE_TRANSPORT
>         select ARM_SCMI_HAVE_MSG

Looking at this again, I noticed that this still needs the explicit
'depends on VIRTIO' line you removed, otherwise the prompt
pops up when both VIRTIO and ARM_SCMI_PROTOCOL
are disabled.

       Arnd


WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@kernel.org>
To: kbuild-all@lists.01.org
Subject: Re: [PATCH] firmware: arm_scmi: Fix virtio transport Kconfig dependency
Date: Mon, 16 Aug 2021 16:30:10 +0200	[thread overview]
Message-ID: <CAK8P3a3+a5z0DuJ45VVHAm2aa3ELM922kqN0YbkPCCMsK3xQWw@mail.gmail.com> (raw)
In-Reply-To: <20210816141609.41751-1-cristian.marussi@arm.com>

[-- Attachment #1: Type: text/plain, Size: 1521 bytes --]

On Mon, Aug 16, 2021 at 4:16 PM Cristian Marussi
<cristian.marussi@arm.com> wrote:
>
> ARM_SCMI_TRANSPORT_VIRTIO is a 'bool' Kconfig used to include support for
> the SCMI virtio transport inside the core SCMI stack; a bare transport
> dependency attached here to this option, though, cannot be properly
> propagated to the parent ARM_SCMI_PROTOCOL option and, as a result, it is
> currently possible to configure a Kernel where SCMI core is builtin
> and includes support for virtio while VirtIO core is =m.
> This allowed combination breaks linking:
>
>         ARM_SCMI_PROTOCOL=y
>         ARM_SCMI_TRANSPORT_VIRTIO=y
>         VIRTIO=m
>
> Bind the dependency in ARM_SCMI_TRANSPORT_VIRTIO to the chosen kind of
> compilation of ARM_SCMI_PROTOCOL.
>
> Reported-by: kernel test robot <lkp@intel.com>
> Suggested-by: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>

The description looks good

Acked-by: Arnd Bergmann <arnd@arndb.de>

> @@ -68,7 +68,7 @@ config ARM_SCMI_TRANSPORT_SMC
>
>  config ARM_SCMI_TRANSPORT_VIRTIO
>         bool "SCMI transport based on VirtIO"
> -       depends on VIRTIO
> +       depends on VIRTIO=y || VIRTIO=ARM_SCMI_PROTOCOL
>         select ARM_SCMI_HAVE_TRANSPORT
>         select ARM_SCMI_HAVE_MSG

Looking at this again, I noticed that this still needs the explicit
'depends on VIRTIO' line you removed, otherwise the prompt
pops up when both VIRTIO and ARM_SCMI_PROTOCOL
are disabled.

       Arnd

  reply	other threads:[~2021-08-16 14:30 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-16 14:16 [PATCH] firmware: arm_scmi: Fix virtio transport Kconfig dependency Cristian Marussi
2021-08-16 14:16 ` Cristian Marussi
2021-08-16 14:30 ` Arnd Bergmann [this message]
2021-08-16 14:30   ` Arnd Bergmann
2021-08-16 14:47   ` Cristian Marussi
2021-08-16 14:47     ` Cristian Marussi
2021-08-16 15:29     ` Arnd Bergmann
2021-08-16 15:29       ` Arnd Bergmann
2021-08-19  5:39 ` Sudeep Holla
2021-08-19  5:39   ` Sudeep Holla

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