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Subject[tip:x86/platform] x86, iosf: Change IOSF_MBI Kconfig to default y
Commit-ID:  0fd9bdfa3b7698e30d2fbc4a029ded0f3428cf10
Author: David E. Box <>
AuthorDate: Mon, 24 Feb 2014 18:47:22 -0800
Committer: H. Peter Anvin <>
CommitDate: Fri, 28 Feb 2014 19:56:13 -0800

x86, iosf: Change IOSF_MBI Kconfig to default y

The IOSF Mailbox interface is an access mechanism used by multiple drivers to
communicate with key configuration registers on new Intel SOC platforms. The
interface is ubiquitous enough that we need to ensure the availability of the
driver in non-EXPERT x86 kernels.

[ hpa: I think it makes sense to build these in unless EXPERT is set,
in which case it should be optional. Ideally the IOSF driver should
be possible to build as a module on which other modules can depend,
but that can be done on top of this work. ]

Signed-off-by: David E. Box <>
Signed-off-by: H. Peter Anvin <>
arch/x86/Kconfig | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0af5250..1487fdd 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2413,11 +2413,12 @@ config X86_DMA_REMAP
depends on STA2X11

config IOSF_MBI
- bool
+ bool "IOSF MBI support" if EXPERT
+ default y
depends on PCI
To be selected by modules requiring access to the Intel OnChip System
- Fabric (IOSF) Sideband MailBox Interface (MBI). For MBI platforms
+ Fabric (IOSF) Sideband MailBox Interface (MBI). For IOSF platforms
enumerable by PCI.

source "net/Kconfig"

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