linux-kernel - [PATCH v3 4/6] x86: Consolidate PCI

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Message-Id: <8527c92b2e2920b8cd9096ddcbbb6d0f4004eb69.1519882849.git.jan.kiszka@siemens.com>
Date:   Thu,  1 Mar 2018 06:40:47 +0100
From:   Jan Kiszka <jan.kiszka@...mens.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     x86@...nel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        jailhouse-dev@...glegroups.com, linux-pci@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: [PATCH v3 4/6] x86: Consolidate PCI_MMCONFIG configs

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

Since e279b6c1d329 ("x86: start unification of arch/x86/Kconfig.*"), we
have two PCI_MMCONFIG entries, one from the original i386 and another
from x86_64. This consolidates both entries into a single one.

The logic for x86_32, where this option was not under user control,
remains identical. On x86_64, PCI_MMCONFIG becomes additionally
configurable for SFI systems even if ACPI was disabled. This just
simplifies the logic without restricting the configurability in any way.

Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
---
 arch/x86/Kconfig | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index eb7f43f23521..aef9d67ac186 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2641,8 +2641,9 @@ config PCI_DIRECT
 	depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC || PCI_GOMMCONFIG))
 
 config PCI_MMCONFIG
-	def_bool y
-	depends on X86_32 && PCI && (ACPI || SFI) && (PCI_GOMMCONFIG || PCI_GOANY)
+	bool "Support mmconfig PCI config space access" if X86_64
+	default y
+	depends on PCI && (ACPI || SFI) && (X86_64 || (PCI_GOANY || PCI_GOMMCONFIG))
 
 config PCI_OLPC
 	def_bool y
@@ -2657,10 +2658,6 @@ config PCI_DOMAINS
 	def_bool y
 	depends on PCI
 
-config PCI_MMCONFIG
-	bool "Support mmconfig PCI config space access"
-	depends on X86_64 && PCI && ACPI
-
 config PCI_CNB20LE_QUIRK
 	bool "Read CNB20LE Host Bridge Windows" if EXPERT
 	depends on PCI
-- 
2.13.6