Re: [Xen-devel] [PATCH v2 2/2] x86, arm, platform, xen, kconfig: add xen defconfig helper

Stefano Stabellini
2014-12-15T14:59:17Z

On Tue, 9 Dec 2014, Luis R. Rodriguez wrote:
> From: "Luis R. Rodriguez" <mcgrof@suse.com>
>
> This lets you build a kernel which can support xen dom0
> or xen guests by just using:
>
> make xenconfig
>
> on both x86 and arm64 kernels. This also splits out the
> options which are available currently to be built with x86
> and 'make ARCH=arm64' under a shared config.
>
> Technically xen supports a dom0 kernel and also a guest
> kernel configuration but upon review with the xen team
> since we don't have many dom0 options its best to just
> combine these two into one.
>
> Cc: Josh Triplett <josh@joshtriplett.org>
> Cc: Borislav Petkov <bp@suse.de>
> Cc: Pekka Enberg <penberg@kernel.org>
> Cc: David Rientjes <rientjes@google.com>
> Cc: Michal Marek <mmarek@suse.cz>
> Cc: Randy Dunlap <rdunlap@infradead.org>
> Cc: penberg@kernel.org
> Cc: levinsasha928@gmail.com
> Cc: mtosatti@redhat.com
> Cc: fengguang.wu@intel.com
> Cc: David Vrabel <david.vrabel@citrix.com>
> Cc: Ian Campbell <Ian.Campbell@citrix.com>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> Cc: xen-devel@lists.xenproject.org
> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
> Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
> ---
> arch/x86/configs/xen.config | 7 +++++++
> kernel/configs/xen.config | 30 ++++++++++++++++++++++++++++++
> scripts/kconfig/Makefile | 5 +++++
> 3 files changed, 42 insertions(+)
> create mode 100644 arch/x86/configs/xen.config
> create mode 100644 kernel/configs/xen.config
>
> diff --git a/arch/x86/configs/xen.config b/arch/x86/configs/xen.config
> new file mode 100644
> index 0000000..92b8587f
> --- /dev/null
> +++ b/arch/x86/configs/xen.config
> @@ -0,0 +1,7 @@
> +# x86 xen specific config options
> +CONFIG_XEN_PVHVM=y
> +CONFIG_XEN_MAX_DOMAIN_MEMORY=500
> +CONFIG_XEN_SAVE_RESTORE=y
> +# CONFIG_XEN_DEBUG_FS is not set
> +CONFIG_XEN_PVH=y
> +CONFIG_XEN_MCE_LOG=y
> diff --git a/kernel/configs/xen.config b/kernel/configs/xen.config
> new file mode 100644
> index 0000000..d2ec010
> --- /dev/null
> +++ b/kernel/configs/xen.config
> @@ -0,0 +1,30 @@
> +# generic config
> +CONFIG_XEN=y
> +CONFIG_XEN_DOM0=y
> +CONFIG_PCI_XEN=y

This shouldn't be here

> +CONFIG_XEN_PCIDEV_FRONTEND=m
> +CONFIG_XEN_BLKDEV_FRONTEND=m
> +CONFIG_XEN_BLKDEV_BACKEND=m
> +CONFIG_XEN_NETDEV_FRONTEND=m
> +CONFIG_XEN_NETDEV_BACKEND=m
> +CONFIG_INPUT_XEN_KBDDEV_FRONTEND=y
> +CONFIG_HVC_XEN=y
> +CONFIG_HVC_XEN_FRONTEND=y
> +CONFIG_TCG_XEN=m

neither should this

> +CONFIG_XEN_WDT=m
> +CONFIG_XEN_FBDEV_FRONTEND=y
> +CONFIG_XEN_BALLOON=y
> +CONFIG_XEN_BALLOON_MEMORY_HOTPLUG=y
> +CONFIG_XEN_SCRUB_PAGES=y
> +CONFIG_XEN_DEV_EVTCHN=m
> +CONFIG_XEN_BACKEND=y
> +CONFIG_XENFS=m
> +CONFIG_XEN_COMPAT_XENFS=y
> +CONFIG_XEN_SYS_HYPERVISOR=y
> +CONFIG_XEN_XENBUS_FRONTEND=y
> +CONFIG_XEN_GNTDEV=m
> +CONFIG_XEN_GRANT_DEV_ALLOC=m
> +CONFIG_SWIOTLB_XEN=y
> +CONFIG_XEN_PCIDEV_BACKEND=m
> +CONFIG_XEN_PRIVCMD=m
> +CONFIG_XEN_ACPI_PROCESSOR=m

and this

> diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
> index ff612b0..f4a8f89 100644
> --- a/scripts/kconfig/Makefile
> +++ b/scripts/kconfig/Makefile
> @@ -117,6 +117,10 @@ PHONY += kvmconfig
> kvmconfig:
> $(call mergeconfig,kvm_guest)
>
> +PHONY += xenconfig
> +xenconfig:
> + $(call mergeconfig,xen)
> +
> PHONY += tinyconfig
> tinyconfig: allnoconfig
> $(call mergeconfig,tiny)
> @@ -142,6 +146,7 @@ help:
> @echo ' listnewconfig - List new options'
> @echo ' olddefconfig - Same as silentoldconfig but sets new symbols to their default value'
> @echo ' kvmconfig - Enable additional options for kvm guest kernel support'
> + @echo ' xenconfig - Enable additional options for xen dom0 and guest kernel support'
> @echo ' tinyconfig - Configure the tiniest possible kernel'
>
> # lxdialog stuff
> --
> 2.1.1
>
>
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