misc: mic: MIC COSM bus

The MIC COSM bus allows the co-processor state management (COSM)
functionality to be shared between multiple generations of Intel MIC
products. The COSM driver registers itself on the COSM bus. The base
PCIe drivers implement the bus ops and register COSM devices on the
bus, resulting in the COSM driver being probed with the COSM devices.
COSM bus ops, e.g. start, stop, ready, reset, therefore abstract out
common functionality from its specific implementation for individual
generations of MIC products.

Reviewed-by: Nikhil Rao <nikhil.rao@intel.com>
Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 20 insertions, 2 deletions

diff --git a/drivers/misc/mic/Kconfig b/drivers/misc/mic/Kconfig
index e9f2f56c370d..1488232317c5 100644
--- a/drivers/misc/mic/Kconfig
+++ b/drivers/misc/mic/Kconfig
@@ -36,7 +36,7 @@ comment "Intel MIC Host Driver"
 
 config INTEL_MIC_HOST
         tristate "Intel MIC Host Driver"
-        depends on 64BIT && PCI && X86 && INTEL_MIC_BUS && SCIF_BUS
+        depends on 64BIT && PCI && X86 && INTEL_MIC_BUS && SCIF_BUS && MIC_COSM
         select VHOST_RING
         help
           This enables Host Driver support for the Intel Many Integrated
@@ -56,7 +56,7 @@ comment "Intel MIC Card Driver"
 
 config INTEL_MIC_CARD
         tristate "Intel MIC Card Driver"
-        depends on 64BIT && X86 && INTEL_MIC_BUS && SCIF_BUS
+        depends on 64BIT && X86 && INTEL_MIC_BUS && SCIF_BUS && MIC_COSM
         select VIRTIO
         help
           This enables card driver support for the Intel Many Integrated
@@ -88,3 +88,21 @@ config SCIF
           More information about the Intel MIC family as well as the Linux
           OS and tools for MIC to use with this driver are available from
           <http://software.intel.com/en-us/mic-developer>.
+
+comment "Intel MIC Coprocessor State Management (COSM) Drivers"
+
+config MIC_COSM
+        tristate "Intel MIC Coprocessor State Management (COSM) Drivers"
+        depends on 64BIT && PCI && X86 && SCIF
+        help
+          This enables COSM driver support for the Intel Many
+          Integrated Core (MIC) family of PCIe form factor coprocessor
+          devices. COSM drivers implement functions such as boot,
+          shutdown, reset and reboot of MIC devices.
+
+          If you are building a host kernel with an Intel MIC device then
+          say M (recommended) or Y, else say N. If unsure say N.
+
+          More information about the Intel MIC family as well as the Linux
+          OS and tools for MIC to use with this driver are available from
+          <http://software.intel.com/en-us/mic-developer>.