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| author |   Halil Pasic <pasic@linux.ibm.com> | 2018-09-13 18:57:16 +0200 |
|---|---|---|
| committer |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2019-06-15 12:25:05 +0200 |
| commit | b50623e5db802e41736f3305cb54c03bc7f0e30a (patch) | |
| tree | 338d7c361dc8b6c3ec9c7d2d9e4fd421fab755dd /drivers/s390/cio/cio.h | |
| parent | s390/cio: add basic protected virtualization support (diff) | |
| download | linux-dev-b50623e5db802e41736f3305cb54c03bc7f0e30a.tar.xz linux-dev-b50623e5db802e41736f3305cb54c03bc7f0e30a.zip | |
s390/airq: use DMA memory for adapter interrupts
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>
Diffstat (limited to 'drivers/s390/cio/cio.h')
| -rw-r--r-- | drivers/s390/cio/cio.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/s390/cio/cio.h b/drivers/s390/cio/cio.h index 06a91743335a..4d6c7d16416e 100644 --- a/drivers/s390/cio/cio.h +++ b/drivers/s390/cio/cio.h @@ -135,6 +135,8 @@ extern int cio_commit_config(struct subchannel *sch); int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key); int cio_tm_intrg(struct subchannel *sch); +extern int __init airq_init(void); + /* Use with care. */ #ifdef CONFIG_CCW_CONSOLE extern struct subchannel *cio_probe_console(void); |