s390/airq: use DMA memory for adapter interrupts

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Protected virtualization guests have to use shared pages for airq
notifier bit vectors, because the hypervisor needs to write these bits.

Let us make sure we allocate DMA memory for the notifier bit vectors by
replacing the kmem_cache with a dma_cache and kalloc() with
cio_dma_zalloc().

Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.ibm.com>
Reviewed-by: Michael Mueller <mimu@linux.ibm.com>
Tested-by: Michael Mueller <mimu@linux.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

...

This commit is contained in:

Halil Pasic 2018-09-13 18:57:16 +02:00 • committed by Heiko Carstens

parent 37db8985b2

commit b50623e5db

4 changed files with 28 additions and 14 deletions

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2

arch/s390/include/asm/airq.h

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37

drivers/s390/cio/airq.c

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2

drivers/s390/cio/cio.h

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1

drivers/s390/cio/css.c

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