linux-kernel - Re: [PATCH v7 10/22] vfio/pci: introduce CONFIG_VFIO_PCI_ZDEV

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Message-ID: <20220516165953.GD1343366@nvidia.com>
Date:   Mon, 16 May 2022 13:59:53 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Matthew Rosato <mjrosato@...ux.ibm.com>
Cc:     linux-s390@...r.kernel.org, alex.williamson@...hat.com,
        cohuck@...hat.com, schnelle@...ux.ibm.com, farman@...ux.ibm.com,
        pmorel@...ux.ibm.com, borntraeger@...ux.ibm.com, hca@...ux.ibm.com,
        gor@...ux.ibm.com, gerald.schaefer@...ux.ibm.com,
        agordeev@...ux.ibm.com, svens@...ux.ibm.com, frankja@...ux.ibm.com,
        david@...hat.com, imbrenda@...ux.ibm.com, vneethv@...ux.ibm.com,
        oberpar@...ux.ibm.com, freude@...ux.ibm.com, thuth@...hat.com,
        pasic@...ux.ibm.com, pbonzini@...hat.com, corbet@....net,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH v7 10/22] vfio/pci: introduce CONFIG_VFIO_PCI_ZDEV_KVM

On Fri, May 13, 2022 at 03:14:57PM -0400, Matthew Rosato wrote:
> diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig
> index 4da1914425e1..ac1290d484e1 100644
> +++ b/drivers/vfio/pci/Kconfig
> @@ -44,6 +44,17 @@ config VFIO_PCI_IGD
>  	  To enable Intel IGD assignment through vfio-pci, say Y.
>  endif
>  
> +config VFIO_PCI_ZDEV_KVM
> +	bool "VFIO PCI extensions for s390x KVM passthrough"
> +	depends on S390 && KVM
> +	default y
> +	help
> +	  Support s390x-specific extensions to enable support for enhancements
> +	  to KVM passthrough capabilities, such as interpretive execution of
> +	  zPCI instructions.
> +
> +	  To enable s390x KVM vfio-pci extensions, say

"say Y"