From: Matthew Rosato <mjrosato@linux.ibm.com>
To: linux-s390@vger.kernel.org
Cc: alex.williamson@redhat.com, cohuck@redhat.com,
schnelle@linux.ibm.com, farman@linux.ibm.com,
pmorel@linux.ibm.com, borntraeger@linux.ibm.com,
hca@linux.ibm.com, gor@linux.ibm.com,
gerald.schaefer@linux.ibm.com, agordeev@linux.ibm.com,
svens@linux.ibm.com, frankja@linux.ibm.com, david@redhat.com,
imbrenda@linux.ibm.com, vneethv@linux.ibm.com,
oberpar@linux.ibm.com, freude@linux.ibm.com, thuth@redhat.com,
pasic@linux.ibm.com, pbonzini@redhat.com, corbet@lwn.net,
jgg@nvidia.com, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org
Subject: Re: [PATCH v8 00/22] KVM: s390: enable zPCI for interpretive execution
Date: Tue, 24 May 2022 15:06:50 -0400 [thread overview]
Message-ID: <59746b70-de0e-35ba-98e7-b30aed2c959f@linux.ibm.com> (raw)
In-Reply-To: <20220524185907.140285-1-mjrosato@linux.ibm.com>
On 5/24/22 2:58 PM, Matthew Rosato wrote:
> Note: this version of the series is built on top of vfio -next:
> https://github.com/awilliam/linux-vfio/tree/next
> As it now depends on 'vfio: remove VFIO_GROUP_NOTIFY_SET_KVM' and its
> prereqs.
> Additionally, if you care to try testing this series on top of vfio -next
> you'll also want to pick up this fix:
> https://lore.kernel.org/kvm/20220519182929.581898-1-mjrosato@linux.ibm.com/
>
> ---
>
> Enable interpretive execution of zPCI instructions + adapter interruption
> forwarding for s390x KVM vfio-pci. This is done by triggering a routine
> when the VFIO group is associated with the KVM guest, transmitting to
> firmware a special token (GISA designation) to enable that specific guest
> for interpretive execution on that zPCI device. Load/store interpreation
> enablement is then controlled by userspace (based upon whether or not a
> SHM bit is placed in the virtual function handle). Adapter Event
> Notification interpretation is controlled from userspace via a new KVM
> ioctl.
>
> By allowing intepretation of zPCI instructions and firmware delivery of
> interrupts to guests, we can reduce the frequency of guest SIE exits for
> zPCI.
>
> From the perspective of guest configuration, you passthrough zPCI devices
> in the same manner as before, with intepretation support being used by
> default if available in kernel+qemu.
>
> Will follow up with a link an updated QEMU series.
>
QEMU v6 series:
https://lore.kernel.org/kvm/20220524190305.140717-1-mjrosato@linux.ibm.com/
prev parent reply other threads:[~2022-05-24 19:07 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-24 18:58 [PATCH v8 00/22] KVM: s390: enable zPCI for interpretive execution Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 01/22] s390/sclp: detect the zPCI load/store interpretation facility Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 02/22] s390/sclp: detect the AISII facility Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 03/22] s390/sclp: detect the AENI facility Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 04/22] s390/sclp: detect the AISI facility Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 05/22] s390/airq: pass more TPI info to airq handlers Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 06/22] s390/airq: allow for airq structure that uses an input vector Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 07/22] s390/pci: externalize the SIC operation controls and routine Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 08/22] s390/pci: stash associated GISA designation Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 09/22] s390/pci: stash dtsm and maxstbl Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 10/22] vfio/pci: introduce CONFIG_VFIO_PCI_ZDEV_KVM Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 11/22] KVM: s390: pci: add basic kvm_zdev structure Matthew Rosato
2022-05-24 22:50 ` Alex Williamson
2022-05-25 13:19 ` Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 12/22] KVM: s390: pci: do initial setup for AEN interpretation Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 13/22] KVM: s390: pci: enable host forwarding of Adapter Event Notifications Matthew Rosato
2022-05-24 18:58 ` [PATCH v8 14/22] KVM: s390: mechanism to enable guest zPCI Interpretation Matthew Rosato
2022-05-24 18:59 ` [PATCH v8 15/22] KVM: s390: pci: provide routines for enabling/disabling interrupt forwarding Matthew Rosato
2022-05-24 18:59 ` [PATCH v8 16/22] KVM: s390: pci: add routines to start/stop interpretive execution Matthew Rosato
2022-05-24 18:59 ` [PATCH v8 17/22] vfio-pci/zdev: add open/close device hooks Matthew Rosato
2022-05-24 21:08 ` Jason Gunthorpe
2022-05-25 13:23 ` Matthew Rosato
2022-05-24 18:59 ` [PATCH v8 18/22] vfio-pci/zdev: add function handle to clp base capability Matthew Rosato
2022-05-24 18:59 ` [PATCH v8 19/22] vfio-pci/zdev: different maxstbl for interpreted devices Matthew Rosato
2022-05-24 18:59 ` [PATCH v8 20/22] KVM: s390: add KVM_S390_ZPCI_OP to manage guest zPCI devices Matthew Rosato
2022-05-24 18:59 ` [PATCH v8 21/22] KVM: s390: introduce CPU feature for zPCI Interpretation Matthew Rosato
2022-05-24 18:59 ` [PATCH v8 22/22] MAINTAINERS: additional files related kvm s390 pci passthrough Matthew Rosato
2022-05-24 19:06 ` Matthew Rosato [this message]
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