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| author | Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> | 2017-03-17 04:17:31 +0100 |
|---|---|---|
| committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2017-03-31 12:55:04 +0200 |
| commit | 63f1934d562de7cf3124de0ef617dcd3be98b279 (patch) | |
| tree | d3613dee9a8c23ab9db3770aa192b3fbe6a8a458 /arch | |
| parent | aec390b937dcaf11c01483b8c348a2b004119aa7 (diff) | |
| download | op-kernel-dev-63f1934d562de7cf3124de0ef617dcd3be98b279.zip op-kernel-dev-63f1934d562de7cf3124de0ef617dcd3be98b279.tar.gz | |
vfio: ccw: basic implementation for vfio_ccw driver
To make vfio support subchannel devices, we need a css driver for
the vfio subchannels. This patch adds a basic vfio-ccw subchannel
driver for this purpose.
To enable VFIO for vfio-ccw, enable S390_CCW_IOMMU config option
and configure VFIO as required.
Acked-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Message-Id: <20170317031743.40128-5-bjsdjshi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/Kconfig | 10 | ||||
| -rw-r--r-- | arch/s390/include/asm/isc.h | 1 |
2 files changed, 11 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index a2dcef0..b53f0359 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -672,6 +672,16 @@ config EADM_SCH To compile this driver as a module, choose M here: the module will be called eadm_sch. +config VFIO_CCW + def_tristate n + prompt "Support for VFIO-CCW subchannels" + depends on S390_CCW_IOMMU && VFIO + help + This driver allows usage of I/O subchannels via VFIO-CCW. + + To compile this driver as a module, choose M here: the + module will be called vfio_ccw. + endmenu menu "Dump support" diff --git a/arch/s390/include/asm/isc.h b/arch/s390/include/asm/isc.h index 68d7d68..8a0b721 100644 --- a/arch/s390/include/asm/isc.h +++ b/arch/s390/include/asm/isc.h @@ -16,6 +16,7 @@ #define CONSOLE_ISC 1 /* console I/O subchannel */ #define EADM_SCH_ISC 4 /* EADM subchannels */ #define CHSC_SCH_ISC 7 /* CHSC subchannels */ +#define VFIO_CCW_ISC IO_SCH_ISC /* VFIO-CCW I/O subchannels */ /* Adapter interrupts. */ #define QDIO_AIRQ_ISC IO_SCH_ISC /* I/O subchannel in qdio mode */ #define PCI_ISC 2 /* PCI I/O subchannels */ |
