From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
linux-pci@vger.kernel.org, Sinan Kaya <okaya@kernel.org>,
Zeev Zilberman <zeev@amazon.com>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
Ali Saidi <alisaidi@amazon.com>
Subject: Re: [PATCH 1/4] arm64: pci: acpi: Use pci_assign_unassigned_root_bus_resources()
Date: Sat, 22 Jun 2019 08:58:16 +1000 [thread overview]
Message-ID: <4d758a3bfff0fbcec94f51cf1872b649108170db.camel@kernel.crashing.org> (raw)
In-Reply-To: <20190621204839.GF127746@google.com>
On Fri, 2019-06-21 at 15:48 -0500, Bjorn Helgaas wrote:
> On Sat, Jun 15, 2019 at 10:23:56AM +1000, Benjamin Herrenschmidt
> wrote:
> > Instead of the simpler
> >
> > pci_bus_size_bridges(bus);
> > pci_bus_assign_resources(bus);
> >
> > Use pci_assign_unassigned_root_bus_resources(). This should have no
> > effect
> > as long as we are reassigning everything. Once we start honoring FW
> > resource allocations, this will bring up the "reallocation" feature
> > which can help making room for SR-IOV when necessary.
> >
> > Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
>
> I applied these to pci/resource, with my comments and acks from
> Lorenzo and Ard. Let me know if I was too aggressive or got
> something
> wrong; I consider these branches malleable until the merge window.
>
> Thanks for the first step on this long journey :)
Heh thanks :-)
Cheers,
Ben.
> > ---
> > arch/arm64/kernel/pci.c | 3 +--
> > 1 file changed, 1 insertion(+), 2 deletions(-)
> >
> > diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
> > index bb85e2f4603f..1419b1b4e9b9 100644
> > --- a/arch/arm64/kernel/pci.c
> > +++ b/arch/arm64/kernel/pci.c
> > @@ -193,8 +193,7 @@ struct pci_bus *pci_acpi_scan_root(struct
> > acpi_pci_root *root)
> > if (!bus)
> > return NULL;
> >
> > - pci_bus_size_bridges(bus);
> > - pci_bus_assign_resources(bus);
> > + pci_assign_unassigned_root_bus_resources(bus);
> >
> > list_for_each_entry(child, &bus->children, node)
> > pcie_bus_configure_settings(child);
> > --
> > 2.17.1
> >
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next prev parent reply other threads:[~2019-06-21 22:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-15 0:23 [PATCH 1/4] arm64: pci: acpi: Use pci_assign_unassigned_root_bus_resources() Benjamin Herrenschmidt
2019-06-15 0:23 ` [PATCH 2/4] pci: acpi: Read _DSM #5 from ACPI on root bridges Benjamin Herrenschmidt
2019-06-21 20:07 ` Bjorn Helgaas
2019-06-15 0:23 ` [PATCH 3/4] pci: Do not auto-enable PCI reallocation when _DSM #5 returns 0 Benjamin Herrenschmidt
2019-06-21 20:07 ` Bjorn Helgaas
2019-06-15 0:23 ` [PATCH 4/4] arm64: pci: acpi: Preserve PCI resources configuration when asked by ACPI Benjamin Herrenschmidt
2019-06-21 14:57 ` Lorenzo Pieralisi
2019-06-21 23:07 ` Benjamin Herrenschmidt
2019-06-21 15:44 ` Ard Biesheuvel
2019-06-21 20:08 ` Bjorn Helgaas
2019-06-20 17:13 ` [PATCH 1/4] arm64: pci: acpi: Use pci_assign_unassigned_root_bus_resources() Lorenzo Pieralisi
2019-06-20 22:55 ` Benjamin Herrenschmidt
2019-06-21 20:06 ` Bjorn Helgaas
2019-06-21 20:48 ` Bjorn Helgaas
2019-06-21 22:58 ` Benjamin Herrenschmidt [this message]
2019-06-21 23:00 ` Benjamin Herrenschmidt
2019-06-21 23:15 ` Bjorn Helgaas
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