linux-kernel - [RFC 2/2] PCI: hv: Tell PCI core arch-specific sysdata is used

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Date:   Sat, 20 Mar 2021 00:19:56 +0800
From:   Boqun Feng <boqun.feng@...il.com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-hyperv@...r.kernel.org, linux-pci@...r.kernel.org
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>, Clint Sbisa <csbisa@...zon.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Sunil Muthuswamy <sunilmut@...rosoft.com>
Subject: [RFC 2/2] PCI: hv: Tell PCI core arch-specific sysdata is used

Use the newly introduced ->use_arch_sysdata to tell PCI core, we still
use the arch-specific sysdata way to set up root PCI buses on
CONFIG_PCI_DOMAINS_GENERIC=y architectures, this is preparation fo
Hyper-V ARM64 guest virtual PCI support.

Signed-off-by: Boqun Feng (Microsoft) <boqun.feng@...il.com>
---
 drivers/pci/controller/pci-hyperv.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
index 27a17a1e4a7c..7cfa18d8a26e 100644
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -859,6 +859,9 @@ static int hv_pcifront_write_config(struct pci_bus *bus, unsigned int devfn,
 static struct pci_ops hv_pcifront_ops = {
 	.read  = hv_pcifront_read_config,
 	.write = hv_pcifront_write_config,
+#ifdef CONFIG_PCI_DOMAINS_GENERIC
+	.use_arch_sysdata = 1,
+#endif
 };
 
 /*
-- 
2.30.2