bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 14:53:58 -04:00
Code Issues Packages Projects Releases Wiki Activity

s390/airq: use DMA memory for adapter interrupts

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/s390/cio/css.c
View File

@@ -1184,6 +1184,7 @@ static int __init css_bus_init(void)
ret = cio_dma_pool_init();
if (ret)
goto out_unregister_pmn;
airq_init();
css_init_done = 1;
/* Enable default isc for I/O subchannels. */