linux-kernel - [PATCH 6/6] arm: Allow to enable PCI

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Message-Id: <4b97c00b9cd72f508aa27f0b58711d73de2cd397.1524582822.git.jan.kiszka@siemens.com>
Date:   Tue, 24 Apr 2018 17:13:42 +0200
From:   Jan Kiszka <jan.kiszka@...mens.com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 6/6] arm: Allow to enable PCI_DOMAINS manually

From: Jan Kiszka <jan.kiszka@...mens.com>

Required when running over Jailhouse, and there is already a physical
host controller that Jailhouse does not intercept and rather adds a
virtual one. That is the case for the Tegra TK1, e.g.

Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
---
 arch/arm/Kconfig | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a7f8e7f4b88f..5f8190cb057d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1248,8 +1248,13 @@ config PCI
 	  VESA. If you have PCI, say Y, otherwise N.
 
 config PCI_DOMAINS
-	bool
+	bool "Support for multiple PCI domains"
 	depends on PCI
+	help
+	  Automatically enabled if the platform supports multiple PCI host
+	  controllers. Say Y if running over a hypervisor like Jailhouse that
+	  dynamically adds further host controllers while the system is
+	  running. Say N otherwise.
 
 config PCI_DOMAINS_GENERIC
 	def_bool PCI_DOMAINS
-- 
2.13.6