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9f30f62163
The patch implements a handler for GIB alert interruptions
on the host. Its task is to alert guests that interrupts are
pending for them.
A GIB alert interrupt statistic counter is added as well:
$ cat /proc/interrupts
CPU0 CPU1
...
GAL: 23 37 [I/O] GIB Alert
...
Signed-off-by: Michael Mueller <mimu@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20190131085247.13826-14-mimu@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
31 lines
1 KiB
C
31 lines
1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_S390_ISC_H
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#define _ASM_S390_ISC_H
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#include <linux/types.h>
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/*
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* I/O interruption subclasses used by drivers.
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* Please add all used iscs here so that it is possible to distribute
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* isc usage between drivers.
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* Reminder: 0 is highest priority, 7 lowest.
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*/
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#define MAX_ISC 7
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/* Regular I/O interrupts. */
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#define IO_SCH_ISC 3 /* regular I/O subchannels */
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#define CONSOLE_ISC 1 /* console I/O subchannel */
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#define EADM_SCH_ISC 4 /* EADM subchannels */
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#define CHSC_SCH_ISC 7 /* CHSC subchannels */
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#define VFIO_CCW_ISC IO_SCH_ISC /* VFIO-CCW I/O subchannels */
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/* Adapter interrupts. */
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#define QDIO_AIRQ_ISC IO_SCH_ISC /* I/O subchannel in qdio mode */
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#define PCI_ISC 2 /* PCI I/O subchannels */
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#define GAL_ISC 5 /* GIB alert */
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#define AP_ISC 6 /* adjunct processor (crypto) devices */
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/* Functions for registration of I/O interruption subclasses */
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void isc_register(unsigned int isc);
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void isc_unregister(unsigned int isc);
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#endif /* _ASM_S390_ISC_H */
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