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Merge branch 'vfio-ccw-for-martin' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/vfio-ccw into features

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Pull vfio-ccw branch to add the basic channel I/O passthrough
intrastructure based on vfio.

The focus is on supporting dasd-eckd(cu_type/dev_type = 0x3990/0x3390)
as the target device.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2017-03-31 13:01:46 +02:00
parent 485527ba57 1877888d0a
commit 6fb81d69d0
19 changed files with 2417 additions and 46 deletions
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18
arch/s390/include/asm/cio.h
View File

@@ -33,6 +33,24 @@ struct ccw1 {
__u32 cda;
} __attribute__ ((packed,aligned(8)));
/**
* struct ccw0 - channel command word
* @cmd_code: command code
* @cda: data address
* @flags: flags, like IDA addressing, etc.
* @reserved: will be ignored
* @count: byte count
*
* The format-0 ccw structure.
*/
struct ccw0 {
__u8 cmd_code;
__u32 cda : 24;
__u8 flags;
__u8 reserved;
__u16 count;
} __packed __aligned(8);
#define CCW_FLAG_DC 0x80
#define CCW_FLAG_CC 0x40
#define CCW_FLAG_SLI 0x20

1
arch/s390/include/asm/isc.h
View File

@@ -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 */