From: Bjorn Helgaas <helgaas@kernel.org>
To: Jan Beulich <jbeulich@suse.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
Stefano Stabellini <sstabellini@kernel.org>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
Juergen Gross <jgross@suse.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>
Subject: Re: [PATCH 10/12] xen-pcifront: this module is PV-only
Date: Tue, 7 Sep 2021 10:30:17 -0500 [thread overview]
Message-ID: <20210907153017.GA741607@bjorn-Precision-5520> (raw)
In-Reply-To: <bbfb4191-9e34-53da-f179-4549b10dcfb3@suse.com>
Update subject to follow conventions (use "git log --oneline
drivers/pci/Kconfig"). Should say what this patch does.
Commit log below should also say what this patch does. Currently it's
part of the rationale for the change, but doesn't say what the patch
does.
On Tue, Sep 07, 2021 at 02:10:41PM +0200, Jan Beulich wrote:
> It's module init function does a xen_pv_domain() check first thing.
> Hence there's no point building it in non-PV configurations.
s/It's/<name of function that calls xen_pv_domain()/ # pcifront_init()?
s/building it/building <name of module>/ # xen-pcifront.o?
I see that CONFIG_XEN_PV is only mentioned in arch/x86, so
CONFIG_XEN_PV=y cannot be set on other arches. Is the current
"depends on X86" just a reflection of that, or is it because of some
other x86 dependency in the code?
The connection between xen_pv_domain() and CONFIG_XEN_PV is not
completely obvious.
If you only build xen-pcifront.o when CONFIG_XEN_PV=y, and
xen_pv_domain() is true if and only if CONFIG_XEN_PV=y, why bother
calling xen_pv_domain() at all?
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
>
> --- a/drivers/pci/Kconfig
> +++ b/drivers/pci/Kconfig
> @@ -110,7 +110,7 @@ config PCI_PF_STUB
>
> config XEN_PCIDEV_FRONTEND
> tristate "Xen PCI Frontend"
> - depends on X86 && XEN
> + depends on XEN_PV
> select PCI_XEN
> select XEN_XENBUS_FRONTEND
> default y
>
next prev parent reply other threads:[~2021-09-07 15:30 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-07 12:03 [PATCH 00/12] swiotlb-xen: fixes and adjustments Jan Beulich
2021-09-07 12:04 ` [PATCH 01/12] swiotlb-xen: avoid double free Jan Beulich
2021-09-08 6:48 ` Christoph Hellwig
2021-09-10 22:55 ` Stefano Stabellini
2021-09-10 22:55 ` Stefano Stabellini
2021-09-07 12:04 ` [PATCH 02/12] swiotlb-xen: fix late init retry Jan Beulich
2021-09-08 6:50 ` Christoph Hellwig
2021-09-07 12:05 ` [PATCH 03/12] swiotlb-xen: maintain slab count properly Jan Beulich
2021-09-08 6:53 ` Christoph Hellwig
2021-09-10 23:10 ` Stefano Stabellini
2021-09-10 23:10 ` Stefano Stabellini
2021-09-07 12:05 ` [PATCH 04/12] swiotlb-xen: ensure to issue well-formed XENMEM_exchange requests Jan Beulich
2021-09-08 6:57 ` Christoph Hellwig
2021-09-08 9:16 ` Jan Beulich
2021-09-10 23:14 ` Stefano Stabellini
2021-09-10 23:14 ` Stefano Stabellini
2021-09-13 7:17 ` Jan Beulich
2021-09-13 20:31 ` Stefano Stabellini
2021-09-13 20:31 ` Stefano Stabellini
2021-09-14 9:11 ` Jan Beulich
2021-09-15 1:22 ` Stefano Stabellini
2021-09-15 1:22 ` Stefano Stabellini
2021-09-15 1:54 ` Stefano Stabellini
2021-09-15 1:54 ` Stefano Stabellini
2021-09-15 8:21 ` Jan Beulich
2021-09-07 12:05 ` [PATCH 05/12] swiotlb-xen: suppress certain init retries Jan Beulich
2021-09-08 6:58 ` Christoph Hellwig
2021-09-10 23:18 ` Stefano Stabellini
2021-09-10 23:18 ` Stefano Stabellini
2021-09-07 12:06 ` [PATCH 06/12] swiotlb-xen: limit " Jan Beulich
2021-09-08 7:00 ` Christoph Hellwig
2021-09-10 23:23 ` Stefano Stabellini
2021-09-10 23:23 ` Stefano Stabellini
2021-09-07 12:06 ` [PATCH 07/12] swiotlb-xen: drop leftover __ref Jan Beulich
2021-09-08 7:02 ` Christoph Hellwig
2021-09-10 23:24 ` Stefano Stabellini
2021-09-10 23:24 ` Stefano Stabellini
2021-09-07 12:07 ` [PATCH 08/12] swiotlb-xen: arrange to have buffer info logged Jan Beulich
2021-09-08 7:04 ` Christoph Hellwig
2021-09-10 23:26 ` Stefano Stabellini
2021-09-10 23:26 ` Stefano Stabellini
2021-09-07 12:07 ` [PATCH 09/12] swiotlb-xen: drop DEFAULT_NSLABS Jan Beulich
2021-09-08 7:06 ` Christoph Hellwig
2021-09-10 23:27 ` Stefano Stabellini
2021-09-10 23:27 ` Stefano Stabellini
2021-09-07 12:10 ` [PATCH 10/12] xen-pcifront: this module is PV-only Jan Beulich
2021-09-07 15:30 ` Bjorn Helgaas [this message]
2021-09-07 16:14 ` Jan Beulich
2021-09-07 16:38 ` Bjorn Helgaas
2021-09-10 23:34 ` Stefano Stabellini
2021-09-10 23:34 ` Stefano Stabellini
2021-09-07 12:11 ` [PATCH 11/12] xen/pci-swiotlb: reduce visibility of symbols Jan Beulich
2021-09-08 7:08 ` Christoph Hellwig
2021-09-07 12:13 ` [PATCH 12/12] swiotlb-xen: this is PV-only on x86 Jan Beulich
2021-09-08 7:14 ` Christoph Hellwig
2021-09-10 23:48 ` Stefano Stabellini
2021-09-10 23:48 ` Stefano Stabellini
2021-09-13 7:28 ` Jan Beulich
2021-09-13 20:54 ` Stefano Stabellini
2021-09-13 20:54 ` Stefano Stabellini
2021-09-13 7:51 ` Jan Beulich
2021-09-13 20:49 ` Stefano Stabellini
2021-09-13 20:49 ` Stefano Stabellini
2021-09-08 15:18 ` [PATCH 00/12] swiotlb-xen: fixes and adjustments Juergen Gross
2021-09-08 15:18 ` Juergen Gross via iommu
2021-09-14 8:30 ` Juergen Gross
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