From: Pierre Morel <pmorel@linux.vnet.ibm.com>
To: Tony Krowiak <akrowiak@linux.vnet.ibm.com>,
linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org
Cc: freude@de.ibm.com, schwidefsky@de.ibm.com,
heiko.carstens@de.ibm.com, borntraeger@de.ibm.com,
cohuck@redhat.com, kwankhede@nvidia.com,
bjsdjshi@linux.vnet.ibm.com, pbonzini@redhat.com,
alex.williamson@redhat.com, alifm@linux.vnet.ibm.com,
mjrosato@linux.vnet.ibm.com, jjherne@linux.vnet.ibm.com,
thuth@redhat.com, pasic@linux.vnet.ibm.com, berrange@redhat.com,
fiuczy@linux.vnet.ibm.com, buendgen@de.ibm.com
Subject: Re: [PATCH v3 05/14] s390: vfio-ap: base implementation of VFIO AP device driver
Date: Thu, 15 Mar 2018 14:25:29 +0100 [thread overview]
Message-ID: <1d5a5e18-1886-dd73-a17e-9bec617507ba@linux.vnet.ibm.com> (raw)
In-Reply-To: <1521051954-25715-6-git-send-email-akrowiak@linux.vnet.ibm.com>
On 14/03/2018 19:25, Tony Krowiak wrote:
> Introduces a new AP device driver. This device driver
> is built on the VFIO mediated device framework. The framework
> provides sysfs interfaces that facilitate passthrough
> access by guests to devices installed on the linux host.
>
> The VFIO AP device driver will serve two purposes:
>
> 1. Provide the interfaces to reserve AP devices for exclusive
> use by KVM guests. This is accomplished by unbinding the
> devices to be reserved for guest usage from the default AP
> device driver and binding them to the VFIO AP device driver.
>
> 2. Implements the functions, callbacks and sysfs attribute
> interfaces required to create one or more VFIO mediated
> devices each of which will be used to configure the AP
> matrix for a guest and serve as a file descriptor
> for facilitating communication between QEMU and the
> VFIO AP device driver.
>
> When the VFIO AP device driver is initialized:
>
> * It registers with the AP bus for control of type 10 (CEX4
> and newer) AP queue devices. The probe and remove callbacks
> will be provided to support the binding/unbinding of
> AP queue devices to/from the VFIO AP device driver.
>
> * Creates a /sys/devices/vfio-ap/matrix device to hold
> the APQNs of the AP devices bound to the VFIO
> AP device driver and serves as the parent of the
> mediated devices created for each guest.
>
> Signed-off-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com>
> ---
> MAINTAINERS | 2 +
> arch/s390/Kconfig | 11 +++
> drivers/s390/crypto/Makefile | 4 +
> drivers/s390/crypto/vfio_ap_drv.c | 135 +++++++++++++++++++++++++++++++++
> drivers/s390/crypto/vfio_ap_private.h | 22 ++++++
> include/uapi/linux/vfio.h | 2 +
> 6 files changed, 176 insertions(+), 0 deletions(-)
> create mode 100644 drivers/s390/crypto/vfio_ap_drv.c
> create mode 100644 drivers/s390/crypto/vfio_ap_private.h
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 72742d5..f129253 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -11884,6 +11884,8 @@ W: http://www.ibm.com/developerworks/linux/linux390/
> S: Supported
> F: arch/s390/include/asm/kvm/kvm-ap.h
> F: arch/s390/kvm/kvm-ap.c
> +F: drivers/s390/crypto/vfio_ap_drv.c
> +F: drivers/s390/crypto/vfio_ap_private.h
>
> S390 ZFCP DRIVER
> M: Steffen Maier <maier@linux.vnet.ibm.com>
> diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
> index cbe1d97..58509db 100644
> --- a/arch/s390/Kconfig
> +++ b/arch/s390/Kconfig
> @@ -771,6 +771,17 @@ config VFIO_CCW
> To compile this driver as a module, choose M here: the
> module will be called vfio_ccw.
>
> +config VFIO_AP
> + def_tristate m
not sure it must be module by default.
I would not set it by default.
> + prompt "VFIO support for AP devices"
> + depends on ZCRYPT && VFIO_MDEV_DEVICE
VFIO_MDEV_DEVICE is a general feature *needed* by VFIO_AP
and has no use case by its own. If it is set it is obviously because some
mediated device drivers needs it.
while ZCRYPT is a Z feature which may be set without VFIO_AP.
So you need:
config VFIO_AP
def_tristate n
prompt "VFIO support for AP devices"
depends on ZCRYPT
select VFIO_MDEV
select VFIO_MDEV_DEVICE
...
Pierre
--
Pierre Morel
Linux/KVM/QEMU in Böblingen - Germany
next prev parent reply other threads:[~2018-03-15 13:26 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-14 18:25 [PATCH v3 00/14] s390: vfio-ap: guest dedicated crypto adapters Tony Krowiak
2018-03-14 18:25 ` [PATCH v3 01/14] KVM: s390: refactor crypto initialization Tony Krowiak
2018-03-15 12:26 ` Pierre Morel
2018-03-15 14:48 ` Tony Krowiak
2018-03-15 14:55 ` Pierre Morel
2018-03-26 8:44 ` Cornelia Huck
2018-03-29 18:57 ` Tony Krowiak
2018-04-03 11:26 ` Cornelia Huck
2018-04-05 10:42 ` Christian Borntraeger
2018-04-05 10:45 ` Christian Borntraeger
2018-04-05 13:16 ` Tony Krowiak
2018-03-14 18:25 ` [PATCH v3 02/14] s390: zcrypt: externalize AP instructions available function Tony Krowiak
2018-03-14 18:25 ` [PATCH v3 03/14] KVM: s390: CPU model support for AP virtualization Tony Krowiak
2018-03-27 10:59 ` Cornelia Huck
2018-03-27 11:22 ` Pierre Morel
2018-03-27 11:30 ` Cornelia Huck
2018-03-14 18:25 ` [PATCH v3 04/14] KVM: s390: device attribute to set AP interpretive execution Tony Krowiak
2018-03-14 21:57 ` Halil Pasic
2018-03-15 13:00 ` Pierre Morel
2018-03-15 15:26 ` Tony Krowiak
2018-03-15 15:45 ` Pierre Morel
2018-03-15 17:21 ` Tony Krowiak
2018-03-15 17:56 ` Pierre Morel
2018-03-15 23:39 ` Tony Krowiak
2018-03-16 7:51 ` Pierre Morel
2018-03-16 16:09 ` Tony Krowiak
2018-03-20 17:58 ` Tony Krowiak
2018-03-20 22:48 ` Halil Pasic
2018-04-02 18:55 ` Tony Krowiak
2018-03-15 15:23 ` Tony Krowiak
2018-03-15 16:00 ` Pierre Morel
2018-03-15 23:37 ` Tony Krowiak
2018-03-15 16:25 ` Halil Pasic
2018-03-14 18:25 ` [PATCH v3 05/14] s390: vfio-ap: base implementation of VFIO AP device driver Tony Krowiak
2018-03-15 13:25 ` Pierre Morel [this message]
2018-03-15 17:25 ` Tony Krowiak
2018-03-27 11:17 ` Cornelia Huck
2018-03-27 14:45 ` Pierre Morel
2018-04-03 9:56 ` Cornelia Huck
2018-04-03 10:57 ` Cornelia Huck
2018-04-03 13:02 ` Tony Krowiak
2018-03-14 18:25 ` [PATCH v3 06/14] s390: vfio-ap: register matrix device with VFIO mdev framework Tony Krowiak
2018-03-14 18:25 ` [PATCH v3 07/14] KVM: s390: interfaces to configure/deconfigure guest's AP matrix Tony Krowiak
2018-04-03 11:07 ` Cornelia Huck
2018-04-03 13:17 ` Tony Krowiak
2018-04-03 13:38 ` Cornelia Huck
2018-03-14 18:25 ` [PATCH v3 08/14] s390: vfio-ap: sysfs interfaces to configure adapters Tony Krowiak
2018-04-03 11:10 ` Cornelia Huck
2018-04-03 13:33 ` Tony Krowiak
2018-03-14 18:25 ` [PATCH v3 09/14] s390: vfio-ap: sysfs interfaces to configure domains Tony Krowiak
2018-04-03 11:17 ` Cornelia Huck
[not found] ` <1860430c-df59-6d58-77f9-b36c51595b4b@linux.vnet.ibm.com>
2018-04-03 15:19 ` Cornelia Huck
2018-04-03 15:42 ` Tony Krowiak
2018-03-14 18:25 ` [PATCH v3 10/14] s390: vfio-ap: sysfs interfaces to configure control domains Tony Krowiak
2018-03-14 18:25 ` [PATCH v3 11/14] s390: vfio-ap: sysfs interface to view matrix mdev matrix Tony Krowiak
2018-03-15 9:42 ` Pierre Morel
2018-03-15 14:52 ` Tony Krowiak
2018-03-15 15:35 ` Pierre Morel
2018-03-27 11:19 ` Cornelia Huck
2018-03-14 18:25 ` [PATCH v3 12/14] KVM: s390: configure the guest's AP devices Tony Krowiak
2018-03-14 18:25 ` [PATCH v3 13/14] s390: vfio-ap: implement VFIO_DEVICE_GET_INFO ioctl Tony Krowiak
2018-03-14 18:25 ` [PATCH v3 14/14] s390: doc: detailed specifications for AP virtualization Tony Krowiak
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