From: Cornelia Huck <cohuck@redhat.com>
To: Tony Krowiak <akrowiak@linux.vnet.ibm.com>
Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, freude@de.ibm.com, schwidefsky@de.ibm.com,
heiko.carstens@de.ibm.com, borntraeger@de.ibm.com,
kwankhede@nvidia.com, bjsdjshi@linux.vnet.ibm.com,
pbonzini@redhat.com, alex.williamson@redhat.com,
pmorel@linux.vnet.ibm.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 07/14] KVM: s390: interfaces to configure/deconfigure guest's AP matrix
Date: Tue, 3 Apr 2018 15:38:11 +0200 [thread overview]
Message-ID: <20180403153811.64c16788.cohuck@redhat.com> (raw)
In-Reply-To: <474b7d18-69ea-631f-214c-f9345119e537@linux.vnet.ibm.com>
On Tue, 3 Apr 2018 09:17:59 -0400
Tony Krowiak <akrowiak@linux.vnet.ibm.com> wrote:
> On 04/03/2018 07:07 AM, Cornelia Huck wrote:
> > On Wed, 14 Mar 2018 14:25:47 -0400
> > Tony Krowiak <akrowiak@linux.vnet.ibm.com> wrote:
> >
> >> Provides interfaces to assign AP adapters, usage domains
> >> and control domains to a KVM guest.
> >>
> >> A KVM guest is started by executing the Start Interpretive Execution (SIE)
> >> instruction. The SIE state description is a control block that contains the
> >> state information for a KVM guest and is supplied as input to the SIE
> >> instruction. The SIE state description has a satellite structure called the
> >> Crypto Control Block (CRYCB). The CRYCB contains three bitmask fields
> >> identifying the adapters, queues (domains) and control domains assigned to
> >> the KVM guest:
> >>
> >> * The AP Adapter Mask (APM) field identifies the AP adapters assigned to
> >> the KVM guest
> >>
> >> * The AP Queue Mask (AQM) field identifies the AP queues assigned to
> >> the KVM guest. Each AP queue is connected to a usage domain within
> >> an AP adapter.
> >>
> >> * The AP Domain Mask (ADM) field identifies the control domains
> >> assigned to the KVM guest.
> >>
> >> Each adapter, queue (usage domain) and control domain are identified by
> >> a number from 0 to 255. The bits in each mask, from most significant to
> >> least significant bit, correspond to the numbers 0-255. When a bit is
> >> set, the corresponding adapter, queue (usage domain) or control domain
> >> is assigned to the KVM guest.
> >>
> >> This patch will set the bits in the APM, AQM and ADM fields of the
> >> CRYCB referenced by the KVM guest's SIE state description. The process
> >> used is:
> >>
> >> 1. Verify that the bits to be set do not exceed the maximum bit
> >> number for the given mask.
> >>
> >> 2. Verify that the APQNs that can be derived from the intersection
> >> of the bits set in the APM and AQM fields of the KVM guest's CRYCB
> >> are not assigned to any other KVM guest running on the same linux
> >> host.
> >>
> >> 3. Set the APM, AQM and ADM in the CRYCB according to the matrix
> >> configured for the mediated matrix device via its sysfs
> >> adapter, domain and control domain attribute files respectively.
> >>
> >> Signed-off-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com>
> >> ---
> >> arch/s390/include/asm/kvm-ap.h | 36 +++++
> >> arch/s390/kvm/kvm-ap.c | 268 +++++++++++++++++++++++++++++++++
> >> drivers/s390/crypto/vfio_ap_ops.c | 19 +++
> >> drivers/s390/crypto/vfio_ap_private.h | 4 +
> >> 4 files changed, 327 insertions(+), 0 deletions(-)
> >>
> >> diff --git a/arch/s390/kvm/kvm-ap.c b/arch/s390/kvm/kvm-ap.c
> >> index a2c6ad2..eb365e2 100644
> >> --- a/arch/s390/kvm/kvm-ap.c
> >> +++ b/arch/s390/kvm/kvm-ap.c
> >> @@ -8,9 +8,129 @@
> >>
> >> #include <asm/kvm-ap.h>
> >> #include <asm/ap.h>
> >> +#include <linux/bitops.h>
> >>
> >> #include "kvm-s390.h"
> >>
> >> +static inline void kvm_ap_clear_crycb_masks(struct kvm *kvm)
> >> +{
> >> + int crycb_fmt = kvm->arch.crypto.crycbd & CRYCB_FORMAT_MASK;
> >> +
> >> + if (crycb_fmt == CRYCB_FORMAT2)
> >> + memset(&kvm->arch.crypto.crycb->apcb1, 0,
> >> + sizeof(kvm->arch.crypto.crycb->apcb1));
> >> + else
> >> + memset(&kvm->arch.crypto.crycb->apcb0, 0,
> >> + sizeof(kvm->arch.crypto.crycb->apcb0));
> >> +}
> > Should that rather be a switch/case? If there's a CRYCB_FORMAT3 in the
> > future, I'd think that it's more likely that it uses apcb1 and not
> > apcb0. Can't comment further without the architecture, obviously.
> Maybe we should just clear both structures without regard to the CRYCB
> format.
Yes; but my concern applies to the other checks for CRYCB_FORMAT2 as
well (snipped).
next prev parent reply other threads:[~2018-04-03 13:38 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
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 [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180403153811.64c16788.cohuck@redhat.com \
--to=cohuck@redhat.com \
--cc=akrowiak@linux.vnet.ibm.com \
--cc=alex.williamson@redhat.com \
--cc=alifm@linux.vnet.ibm.com \
--cc=berrange@redhat.com \
--cc=bjsdjshi@linux.vnet.ibm.com \
--cc=borntraeger@de.ibm.com \
--cc=buendgen@de.ibm.com \
--cc=fiuczy@linux.vnet.ibm.com \
--cc=freude@de.ibm.com \
--cc=heiko.carstens@de.ibm.com \
--cc=jjherne@linux.vnet.ibm.com \
--cc=kvm@vger.kernel.org \
--cc=kwankhede@nvidia.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=mjrosato@linux.vnet.ibm.com \
--cc=pasic@linux.vnet.ibm.com \
--cc=pbonzini@redhat.com \
--cc=pmorel@linux.vnet.ibm.com \
--cc=schwidefsky@de.ibm.com \
--cc=thuth@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).