From: Pierre Morel <pmorel@linux.ibm.com>
To: Matthew Rosato <mjrosato@linux.ibm.com>, linux-s390@vger.kernel.org
Cc: alex.williamson@redhat.com, cohuck@redhat.com,
schnelle@linux.ibm.com, farman@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,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org
Subject: Re: [PATCH v5 10/21] KVM: s390: pci: add basic kvm_zdev structure
Date: Tue, 19 Apr 2022 09:55:45 +0200 [thread overview]
Message-ID: <4cf23453-e00a-c2e2-aeb1-4030e16d6d17@linux.ibm.com> (raw)
In-Reply-To: <20220404174349.58530-11-mjrosato@linux.ibm.com>
On 4/4/22 19:43, Matthew Rosato wrote:
> This structure will be used to carry kvm passthrough information related to
> zPCI devices.
>
> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
> ---
> arch/s390/include/asm/pci.h | 3 +++
> arch/s390/kvm/Makefile | 1 +
> arch/s390/kvm/pci.c | 38 +++++++++++++++++++++++++++++++++++++
> arch/s390/kvm/pci.h | 21 ++++++++++++++++++++
> 4 files changed, 63 insertions(+)
> create mode 100644 arch/s390/kvm/pci.c
> create mode 100644 arch/s390/kvm/pci.h
>
> diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
> index 4c5b8fbc2079..9eb20cebaa18 100644
> --- a/arch/s390/include/asm/pci.h
> +++ b/arch/s390/include/asm/pci.h
> @@ -97,6 +97,7 @@ struct zpci_bar_struct {
> };
>
> struct s390_domain;
> +struct kvm_zdev;
>
> #define ZPCI_FUNCTIONS_PER_BUS 256
> struct zpci_bus {
> @@ -190,6 +191,8 @@ struct zpci_dev {
> struct dentry *debugfs_dev;
>
> struct s390_domain *s390_domain; /* s390 IOMMU domain data */
> +
> + struct kvm_zdev *kzdev; /* passthrough data */
> };
>
> static inline bool zdev_enabled(struct zpci_dev *zdev)
> diff --git a/arch/s390/kvm/Makefile b/arch/s390/kvm/Makefile
> index 26f4a74e5ce4..00cf6853d93f 100644
> --- a/arch/s390/kvm/Makefile
> +++ b/arch/s390/kvm/Makefile
> @@ -10,4 +10,5 @@ ccflags-y := -Ivirt/kvm -Iarch/s390/kvm
> kvm-y += kvm-s390.o intercept.o interrupt.o priv.o sigp.o
> kvm-y += diag.o gaccess.o guestdbg.o vsie.o pv.o
>
> +kvm-$(CONFIG_PCI) += pci.o
> obj-$(CONFIG_KVM) += kvm.o
> diff --git a/arch/s390/kvm/pci.c b/arch/s390/kvm/pci.c
> new file mode 100644
> index 000000000000..213be236c05a
> --- /dev/null
> +++ b/arch/s390/kvm/pci.c
> @@ -0,0 +1,38 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * s390 kvm PCI passthrough support
> + *
> + * Copyright IBM Corp. 2022
> + *
> + * Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
> + */
> +
> +#include <linux/kvm_host.h>
> +#include <linux/pci.h>
> +#include "pci.h"
> +
> +int kvm_s390_pci_dev_open(struct zpci_dev *zdev)
> +{
> + struct kvm_zdev *kzdev;
> +
> + kzdev = kzalloc(sizeof(struct kvm_zdev), GFP_KERNEL);
> + if (!kzdev)
> + return -ENOMEM;
> +
> + kzdev->zdev = zdev;
> + zdev->kzdev = kzdev;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(kvm_s390_pci_dev_open);
> +
> +void kvm_s390_pci_dev_release(struct zpci_dev *zdev)
> +{
> + struct kvm_zdev *kzdev;
> +
> + kzdev = zdev->kzdev;
> + WARN_ON(kzdev->zdev != zdev);
> + zdev->kzdev = 0;
> + kfree(kzdev);
> +}
> +EXPORT_SYMBOL_GPL(kvm_s390_pci_dev_release);
> diff --git a/arch/s390/kvm/pci.h b/arch/s390/kvm/pci.h
> new file mode 100644
> index 000000000000..ce93978e8913
> --- /dev/null
> +++ b/arch/s390/kvm/pci.h
> @@ -0,0 +1,21 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * s390 kvm PCI passthrough support
> + *
> + * Copyright IBM Corp. 2022
> + *
> + * Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
> + */
> +
> +#ifndef __KVM_S390_PCI_H
> +#define __KVM_S390_PCI_H
> +
> +#include <linux/kvm_host.h>
> +#include <linux/pci.h>
> +
> +struct kvm_zdev {
> + struct zpci_dev *zdev;
> + struct kvm *kvm;
> +};
> +
> +#endif /* __KVM_S390_PCI_H */
>
--
Pierre Morel
IBM Lab Boeblingen
next prev parent reply other threads:[~2022-04-19 7:52 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-04 17:43 [PATCH v5 00/21] KVM: s390: enable zPCI for interpretive execution Matthew Rosato
2022-04-04 17:43 ` [PATCH v5 01/21] s390/sclp: detect the zPCI load/store interpretation facility Matthew Rosato
2022-04-04 17:43 ` [PATCH v5 02/21] s390/sclp: detect the AISII facility Matthew Rosato
2022-04-04 17:43 ` [PATCH v5 03/21] s390/sclp: detect the AENI facility Matthew Rosato
2022-04-04 17:43 ` [PATCH v5 04/21] s390/sclp: detect the AISI facility Matthew Rosato
2022-04-04 17:43 ` [PATCH v5 05/21] s390/airq: pass more TPI info to airq handlers Matthew Rosato
2022-04-04 17:43 ` [PATCH v5 06/21] s390/airq: allow for airq structure that uses an input vector Matthew Rosato
2022-04-04 17:43 ` [PATCH v5 07/21] s390/pci: externalize the SIC operation controls and routine Matthew Rosato
2022-04-04 17:43 ` [PATCH v5 08/21] s390/pci: stash associated GISA designation Matthew Rosato
2022-04-05 8:03 ` Niklas Schnelle
2022-04-12 16:18 ` Christian Borntraeger
2022-04-19 7:54 ` Pierre Morel
2022-04-04 17:43 ` [PATCH v5 09/21] s390/pci: stash dtsm and maxstbl Matthew Rosato
2022-04-04 17:43 ` [PATCH v5 10/21] KVM: s390: pci: add basic kvm_zdev structure Matthew Rosato
2022-04-05 8:20 ` Niklas Schnelle
2022-04-05 13:51 ` Matthew Rosato
2022-04-12 16:20 ` Christian Borntraeger
2022-04-19 7:55 ` Pierre Morel [this message]
2022-04-04 17:43 ` [PATCH v5 11/21] KVM: s390: pci: do initial setup for AEN interpretation Matthew Rosato
2022-04-14 7:20 ` Christian Borntraeger
2022-04-14 13:00 ` Matthew Rosato
2022-04-19 8:16 ` Pierre Morel
2022-04-20 13:43 ` Matthew Rosato
2022-04-04 17:43 ` [PATCH v5 12/21] KVM: s390: pci: enable host forwarding of Adapter Event Notifications Matthew Rosato
2022-04-19 9:21 ` Pierre Morel
2022-04-04 17:43 ` [PATCH v5 13/21] KVM: s390: mechanism to enable guest zPCI Interpretation Matthew Rosato
2022-04-19 9:30 ` Pierre Morel
2022-04-04 17:43 ` [PATCH v5 14/21] KVM: s390: pci: provide routines for enabling/disabling interrupt forwarding Matthew Rosato
2022-04-05 13:39 ` Niklas Schnelle
2022-04-05 13:48 ` Matthew Rosato
2022-04-05 15:06 ` Pierre Morel
2022-04-08 12:48 ` Jason Gunthorpe
2022-04-11 12:19 ` Heiko Carstens
2022-04-04 17:43 ` [PATCH v5 15/21] KVM: s390: pci: add routines to start/stop interpretive execution Matthew Rosato
2022-04-08 12:47 ` Jason Gunthorpe
2022-04-12 13:14 ` Matthew Rosato
2022-04-12 13:29 ` Jason Gunthorpe
2022-04-04 17:43 ` [PATCH v5 16/21] KVM: vfio: add s390x hook to register KVM guest designation Matthew Rosato
2022-04-08 12:45 ` Jason Gunthorpe
2022-04-12 13:39 ` Matthew Rosato
2022-04-12 13:55 ` Jason Gunthorpe
2022-04-12 14:32 ` Matthew Rosato
2022-04-04 17:43 ` [PATCH v5 17/21] vfio-pci/zdev: add function handle to clp base capability Matthew Rosato
2022-04-19 9:40 ` Pierre Morel
2022-04-04 17:43 ` [PATCH v5 18/21] vfio-pci/zdev: different maxstbl for interpreted devices Matthew Rosato
2022-04-19 9:41 ` Pierre Morel
2022-04-04 17:43 ` [PATCH v5 19/21] KVM: s390: add KVM_S390_ZPCI_OP to manage guest zPCI devices Matthew Rosato
2022-04-19 10:07 ` Pierre Morel
2022-04-20 14:10 ` Matthew Rosato
2022-04-20 18:18 ` Pierre Morel
2022-04-04 17:43 ` [PATCH v5 20/21] KVM: s390: introduce CPU feature for zPCI Interpretation Matthew Rosato
2022-04-19 10:08 ` Pierre Morel
2022-04-04 17:43 ` [PATCH v5 21/21] MAINTAINERS: additional files related kvm s390 pci passthrough Matthew Rosato
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