msi: introduce ARCH_SUPPORTS_MSI Kconfig option (rev2)

Allows architectures to advertise that they support MSI rather than listing
each architecture as a PCI_MSI dependency.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

6 files changed, 10 insertions, 1 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index e7baca29f3fb..db00376aca15 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -255,6 +255,7 @@ config ARCH_IOP13XX
         depends on MMU
         select PLAT_IOP
         select PCI
+        select ARCH_SUPPORTS_MSI
         help
           Support for Intel's IOP13XX (XScale) family of processors.
 
diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index 53d62373a524..bcf2fc408a1a 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -1073,6 +1073,7 @@ config PCI
         bool "PCI support" if !X86_VISWS
         depends on !X86_VOYAGER
         default y if X86_VISWS
+        select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
         help
           Find out whether you have a PCI motherboard. PCI is the name of a
           bus system, i.e. the way the CPU talks to the other stuff inside
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index e19185d26554..3b71f97d0b60 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -14,6 +14,7 @@ config IA64
         select PCI if (!IA64_HP_SIM)
         select ACPI if (!IA64_HP_SIM)
         select PM if (!IA64_HP_SIM)
+        select ARCH_SUPPORTS_MSI
         default y
         help
           The Itanium Processor Family is Intel's 64-bit successor to
diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index 590a41b864b9..be9e10b94ef8 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -306,6 +306,7 @@ config SUN_IO
 
 config PCI
         bool "PCI support"
+        select ARCH_SUPPORTS_MSI
         help
           Find out whether you have a PCI motherboard. PCI is the name of a
           bus system, i.e. the way the CPU talks to the other stuff inside
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 56eb14c98475..e9b4f058a49a 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -676,6 +676,7 @@ menu "Bus options (PCI etc.)"
 
 config PCI
         bool "PCI support"
+        select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
 
 # x86-64 doesn't support PCI BIOS access from long mode so always go direct.
 config PCI_DIRECT
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 5ea5bc70cb82..70efe8f285a6 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -1,10 +1,14 @@
 #
 # PCI configuration
 #
+config ARCH_SUPPORTS_MSI
+        bool
+        default n
+
 config PCI_MSI
         bool "Message Signaled Interrupts (MSI and MSI-X)"
         depends on PCI
-        depends on (X86_LOCAL_APIC && X86_IO_APIC) || IA64 || SPARC64
+        depends on ARCH_SUPPORTS_MSI
         help
            This allows device drivers to enable MSI (Message Signaled
            Interrupts).  Message Signaled Interrupts enable a device to