search for: dma_cach

Displaying 20 results from an estimated 24 matches for "dma_cach".

Did you mean: dma_cache
2019 May 16
3
[PATCH 05/10] s390/cio: introduce DMA pools to cio
On Sun, 12 May 2019, Halil Pasic wrote: > I've also got code that deals with AIRQ_IV_CACHELINE by turning the > kmem_cache into a dma_pool. > > Cornelia, Sebastian which approach do you prefer: > 1) get rid of cio_dma_pool and AIRQ_IV_CACHELINE, and waste a page per > vector, or > 2) go with the approach taken by the patch below? We only have a couple of users for
2019 May 16
3
[PATCH 05/10] s390/cio: introduce DMA pools to cio
On Sun, 12 May 2019, Halil Pasic wrote: > I've also got code that deals with AIRQ_IV_CACHELINE by turning the > kmem_cache into a dma_pool. > > Cornelia, Sebastian which approach do you prefer: > 1) get rid of cio_dma_pool and AIRQ_IV_CACHELINE, and waste a page per > vector, or > 2) go with the approach taken by the patch below? We only have a couple of users for
2019 May 20
0
[PATCH 05/10] s390/cio: introduce DMA pools to cio
...and provides the behavior which is closest to the current one. Commit 414cbd1e3d14 "s390/airq: provide cacheline aligned ivs" (Sebastian Ott, 2019-02-27) could have been smaller had you implemented 'kmem_cache for everything' (and I would have had just to replace kmem_cache with dma_cache to achieve option 3). For some reason you decided to keep the iv->vector = kzalloc(size, GFP_KERNEL) code-path and make the client code request iv->vector = kmem_cache_zalloc(airq_iv_cache, GFP_KERNEL) explicitly, using a flag which you only decided to use for directed pci irqs AFAICT. My u...
2019 Jun 11
2
[PATCH v4 4/8] s390/airq: use DMA memory for adapter interrupts
...;pasic at linux.ibm.com> wrote: > Protected virtualization guests have to use shared pages for airq > notifier bit vectors, because 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 at linux.ibm.com> > Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> > --- > arch/s390/include/asm/airq.h | 2 ++ > drivers/s390/cio/airq.c | 32 ++++++++++++++++++++------------...
2019 Jun 11
2
[PATCH v4 4/8] s390/airq: use DMA memory for adapter interrupts
...;pasic at linux.ibm.com> wrote: > Protected virtualization guests have to use shared pages for airq > notifier bit vectors, because 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 at linux.ibm.com> > Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> > --- > arch/s390/include/asm/airq.h | 2 ++ > drivers/s390/cio/airq.c | 32 ++++++++++++++++++++------------...
2019 Jun 03
2
[PATCH v3 4/8] s390/airq: use DMA memory for adapter interrupts
...lt;pasic at linux.ibm.com> > > Protected virtualization guests have to use shared pages for airq > notifier bit vectors, because 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 at linux.ibm.com> > Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> > Signed-off-by: Michael Mueller <mimu at linux.ibm.com> > --- > arch/s390/include/asm/airq.h | 2 ++ >...
2019 Jun 03
2
[PATCH v3 4/8] s390/airq: use DMA memory for adapter interrupts
...lt;pasic at linux.ibm.com> > > Protected virtualization guests have to use shared pages for airq > notifier bit vectors, because 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 at linux.ibm.com> > Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> > Signed-off-by: Michael Mueller <mimu at linux.ibm.com> > --- > arch/s390/include/asm/airq.h | 2 ++ >...
2019 May 22
1
[PATCH 05/10] s390/cio: introduce DMA pools to cio
...further simplification/unification later. > Commit 414cbd1e3d14 "s390/airq: provide cacheline aligned > ivs" (Sebastian Ott, 2019-02-27) could have been smaller had you implemented > 'kmem_cache for everything' (and I would have had just to replace kmem_cache with > dma_cache to achieve option 3). For some reason you decided to keep the > iv->vector = kzalloc(size, GFP_KERNEL) code-path and make the client code request > iv->vector = kmem_cache_zalloc(airq_iv_cache, GFP_KERNEL) explicitly, using a flag > which you only decided to use for directed pci irq...
2019 Jun 04
0
[PATCH v3 4/8] s390/airq: use DMA memory for adapter interrupts
...> > > > Protected virtualization guests have to use shared pages for airq > > notifier bit vectors, because 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 at linux.ibm.com> > > Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> > > Signed-off-by: Michael Mueller <mimu at linux.ibm.com> > > --- > > arch/s39...
2019 Jun 11
0
[PATCH v4 4/8] s390/airq: use DMA memory for adapter interrupts
...ote: > > > Protected virtualization guests have to use shared pages for airq > > notifier bit vectors, because 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 at linux.ibm.com> > > Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> > > --- > > arch/s390/include/asm/airq.h | 2 ++ > > drivers/s390/cio/airq.c |...
2019 Jun 12
1
[PATCH v5 4/8] s390/airq: use DMA memory for adapter interrupts
...;pasic at linux.ibm.com> wrote: > Protected virtualization guests have to use shared pages for airq > notifier bit vectors, because 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 at linux.ibm.com> > Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> > --- > arch/s390/include/asm/airq.h | 2 ++ > drivers/s390/cio/airq.c | 37 ++++++++++++++++++++++----------...
2019 Jun 11
2
[PATCH v4 4/8] s390/airq: use DMA memory for adapter interrupts
...Protected virtualization guests have to use shared pages for airq > > > notifier bit vectors, because 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 at linux.ibm.com> > > > Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> > > > --- > > > arch/s390/include/asm/airq.h | 2 ++ > > &g...
2019 Jun 11
2
[PATCH v4 4/8] s390/airq: use DMA memory for adapter interrupts
...Protected virtualization guests have to use shared pages for airq > > > notifier bit vectors, because 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 at linux.ibm.com> > > > Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> > > > --- > > > arch/s390/include/asm/airq.h | 2 ++ > > &g...
2019 May 23
0
[PATCH v2 4/8] s390/airq: use DMA memory for adapter interrupts
From: Halil Pasic <pasic at linux.ibm.com> Protected virtualization guests have to use shared pages for airq notifier bit vectors, because 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 at linux.ibm.com> --- arch/s390/include/asm/airq.h | 2 ++ drivers/s390/cio/airq.c | 32 ++++++++++++++++++++------------ drivers/s390/cio/cio.h | 2 ++ drivers/s390/cio/css.c | 1 + 4 files changed,...
2019 Jun 06
0
[PATCH v4 4/8] s390/airq: use DMA memory for adapter interrupts
Protected virtualization guests have to use shared pages for airq notifier bit vectors, because 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 at linux.ibm.com> Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> --- arch/s390/include/asm/airq.h | 2 ++ drivers/s390/cio/airq.c | 32 ++++++++++++++++++++------------ drivers/s390/cio/cio.h | 2...
2019 Jun 12
0
[PATCH v5 4/8] s390/airq: use DMA memory for adapter interrupts
Protected virtualization guests have to use shared pages for airq notifier bit vectors, because 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 at linux.ibm.com> Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> --- arch/s390/include/asm/airq.h | 2 ++ drivers/s390/cio/airq.c | 37 ++++++++++++++++++++++-------------- drivers/s390/cio/cio.h...
2019 May 29
0
[PATCH v3 4/8] s390/airq: use DMA memory for adapter interrupts
From: Halil Pasic <pasic at linux.ibm.com> Protected virtualization guests have to use shared pages for airq notifier bit vectors, because 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 at linux.ibm.com> Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> Signed-off-by: Michael Mueller <mimu at linux.ibm.com> --- arch/s390/include/asm/airq.h | 2 ++ drivers/s390/cio/airq.c | 32 ++++++...
2019 Jun 12
0
[PATCH v4 4/8] s390/airq: use DMA memory for adapter interrupts
...ation guests have to use shared pages for airq > > > > notifier bit vectors, because 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 at linux.ibm.com> > > > > Reviewed-by: Sebastian Ott <sebott at linux.ibm.com> > > > > --- > > > > arch/s390/include/a...
2019 May 23
18
[PATCH v2 0/8] s390: virtio: support protected virtualization
Enhanced virtualization protection technology may require the use of bounce buffers for I/O. While support for this was built into the virtio core, virtio-ccw wasn't changed accordingly. Some background on technology (not part of this series) and the terminology used. * Protected Virtualization (PV): Protected Virtualization guarantees, that non-shared memory of a guest that operates in PV
2019 Jun 06
15
[PATCH v4 0/8] s390: virtio: support protected virtualization
Enhanced virtualization protection technology may require the use of bounce buffers for I/O. While support for this was built into the virtio core, virtio-ccw wasn't changed accordingly. Some background on technology (not part of this series) and the terminology used. * Protected Virtualization (PV): Protected Virtualization guarantees, that non-shared memory of a guest that operates in PV