From: Cornelia Huck <cohuck@redhat.com>
To: Halil Pasic <pasic@linux.ibm.com>
Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org,
Sebastian Ott <sebott@linux.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
virtualization@lists.linux-foundation.org,
"Michael S. Tsirkin" <mst@redhat.com>,
Christoph Hellwig <hch@infradead.org>,
Thomas Huth <thuth@redhat.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Viktor Mihajlovski <mihajlov@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
Michael Mueller <mimu@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Farhan Ali <alifm@linux.ibm.com>,
Eric Farman <farman@linux.ibm.com>,
"Jason J. Herne" <jjherne@linux.ibm.com>
Subject: Re: [PATCH v5 2/8] s390/cio: introduce DMA pools to cio
Date: Wed, 12 Jun 2019 16:23:48 +0200 [thread overview]
Message-ID: <20190612162348.0c43b806.cohuck@redhat.com> (raw)
In-Reply-To: <20190612111236.99538-3-pasic@linux.ibm.com>
On Wed, 12 Jun 2019 13:12:30 +0200
Halil Pasic <pasic@linux.ibm.com> wrote:
> To support protected virtualization cio will need to make sure the
> memory used for communication with the hypervisor is DMA memory.
>
> Let us introduce one global pool for cio.
>
> Our DMA pools are implemented as a gen_pool backed with DMA pages. The
> idea is to avoid each allocation effectively wasting a page, as we
> typically allocate much less than PAGE_SIZE.
>
> Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
> Reviewed-by: Sebastian Ott <sebott@linux.ibm.com>
> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
> ---
> arch/s390/Kconfig | 1 +
> arch/s390/include/asm/cio.h | 11 +++
> drivers/s390/cio/css.c | 133 ++++++++++++++++++++++++++++++++++--
> 3 files changed, 141 insertions(+), 4 deletions(-)
Changes look good to me.
WARNING: multiple messages have this Message-ID (diff)
From: Cornelia Huck <cohuck@redhat.com>
To: Halil Pasic <pasic@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>,
linux-s390@vger.kernel.org, Thomas Huth <thuth@redhat.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
kvm@vger.kernel.org, Sebastian Ott <sebott@linux.ibm.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Farhan Ali <alifm@linux.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Eric Farman <farman@linux.ibm.com>,
virtualization@lists.linux-foundation.org,
Christoph Hellwig <hch@infradead.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
"Jason J. Herne" <jjherne@linux.ibm.com>,
Michael Mueller <mimu@linux.ibm.com>,
Viktor Mihajlovski <mihajlov@linux.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>
Subject: Re: [PATCH v5 2/8] s390/cio: introduce DMA pools to cio
Date: Wed, 12 Jun 2019 16:23:48 +0200 [thread overview]
Message-ID: <20190612162348.0c43b806.cohuck@redhat.com> (raw)
In-Reply-To: <20190612111236.99538-3-pasic@linux.ibm.com>
On Wed, 12 Jun 2019 13:12:30 +0200
Halil Pasic <pasic@linux.ibm.com> wrote:
> To support protected virtualization cio will need to make sure the
> memory used for communication with the hypervisor is DMA memory.
>
> Let us introduce one global pool for cio.
>
> Our DMA pools are implemented as a gen_pool backed with DMA pages. The
> idea is to avoid each allocation effectively wasting a page, as we
> typically allocate much less than PAGE_SIZE.
>
> Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
> Reviewed-by: Sebastian Ott <sebott@linux.ibm.com>
> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
> ---
> arch/s390/Kconfig | 1 +
> arch/s390/include/asm/cio.h | 11 +++
> drivers/s390/cio/css.c | 133 ++++++++++++++++++++++++++++++++++--
> 3 files changed, 141 insertions(+), 4 deletions(-)
Changes look good to me.
next prev parent reply other threads:[~2019-06-12 14:24 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-12 11:12 [PATCH v5 0/8] s390: virtio: support protected virtualization Halil Pasic
2019-06-12 11:12 ` Halil Pasic
2019-06-12 11:12 ` [PATCH v5 1/8] s390/mm: force swiotlb for " Halil Pasic
2019-06-12 11:12 ` Halil Pasic
2019-06-13 8:09 ` Michael Mueller
2019-06-13 8:09 ` Michael Mueller
2019-07-11 21:48 ` Thiago Jung Bauermann
2019-07-11 21:48 ` Thiago Jung Bauermann
2019-06-12 11:12 ` [PATCH v5 2/8] s390/cio: introduce DMA pools to cio Halil Pasic
2019-06-12 11:12 ` Halil Pasic
2019-06-12 14:23 ` Cornelia Huck [this message]
2019-06-12 14:23 ` Cornelia Huck
2019-06-13 8:13 ` Michael Mueller
2019-06-13 8:13 ` Michael Mueller
2019-06-12 11:12 ` [PATCH v5 3/8] s390/cio: add basic protected virtualization support Halil Pasic
2019-06-12 11:12 ` Halil Pasic
2019-06-13 8:21 ` Michael Mueller
2019-06-13 8:21 ` Michael Mueller
2019-06-12 11:12 ` [PATCH v5 4/8] s390/airq: use DMA memory for adapter interrupts Halil Pasic
2019-06-12 11:12 ` Halil Pasic
2019-06-12 14:35 ` Cornelia Huck
2019-06-12 14:35 ` Cornelia Huck
2019-06-12 15:11 ` Halil Pasic
2019-06-12 15:11 ` Halil Pasic
2019-06-13 8:25 ` Michael Mueller
2019-06-13 8:25 ` Michael Mueller
2019-06-12 11:12 ` [PATCH v5 5/8] virtio/s390: use cacheline aligned airq bit vectors Halil Pasic
2019-06-12 11:12 ` Halil Pasic
2019-06-13 8:27 ` Michael Mueller
2019-06-13 8:27 ` Michael Mueller
2019-06-12 11:12 ` [PATCH v5 6/8] virtio/s390: add indirection to indicators access Halil Pasic
2019-06-12 11:12 ` Halil Pasic
2019-06-13 8:29 ` Michael Mueller
2019-06-13 8:29 ` Michael Mueller
2019-06-12 11:12 ` [PATCH v5 7/8] virtio/s390: use DMA memory for ccw I/O and classic notifiers Halil Pasic
2019-06-12 11:12 ` Halil Pasic
2019-06-13 8:32 ` Michael Mueller
2019-06-13 8:32 ` Michael Mueller
2019-06-12 11:12 ` [PATCH v5 8/8] virtio/s390: make airq summary indicators DMA Halil Pasic
2019-06-12 11:12 ` Halil Pasic
2019-06-13 8:35 ` Michael Mueller
2019-06-13 8:35 ` Michael Mueller
2019-06-13 9:11 ` [PATCH v5 0/8] s390: virtio: support protected virtualization Michael Mueller
2019-06-13 9:11 ` Michael Mueller
2019-06-13 11:14 ` Halil Pasic
2019-06-13 11:14 ` Halil Pasic
2019-06-13 11:17 ` Michael Mueller
2019-06-13 11:17 ` Michael Mueller
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