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Message-Id: <1432148019-15932-3-git-send-email-mcgrof@do-not-panic.com> Date: Wed, 20 May 2015 11:53:39 -0700 From: "Luis R. Rodriguez" <mcgrof@...not-panic.com> To: mmarek@...e.cz, david.vrabel@...rix.com, konrad.wilk@...cle.com, Ian.Campbell@...rix.com, xen-devel@...ts.xenproject.org Cc: josh@...htriplett.org, bp@...e.de, penberg@...nel.org, rientjes@...gle.com, rdunlap@...radead.org, levinsasha928@...il.com, mtosatti@...hat.com, fengguang.wu@...el.com, yamada.masahiro@...ionext.com, linux-kernel@...r.kernel.org, "Luis R. Rodriguez" <mcgrof@...e.com> Subject: [PATCH v6 2/2] kconfig: add xenconfig defconfig helper From: "Luis R. Rodriguez" <mcgrof@...e.com> This lets you build a kernel which can support xen dom0 or xen guests on i386, x86-64 and arm64 by just using: make xenconfig You can start from an allnoconfig and then switch to xenconfig. 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. A few generic notes: we enable both of these: CONFIG_INET=y CONFIG_BINFMT_ELF=y although technically not required given you likely will end up with a pretty useless system otherwise. A few architectural differences worth noting: $ make allnoconfig; make xenconfig > /dev/null ; \ grep XEN .config > 64-bit-config $ make ARCH=i386 allnoconfig; make ARCH=i386 xenconfig > /dev/null; \ grep XEN .config > 32-bit-config $ make ARCH=arm64 allnoconfig; make ARCH=arm64 xenconfig > /dev/null; \ grep XEN .config > arm64-config Since the options are already split up with a generic config and architecture specific configs you anything on the x86 configs are known to only work right now on x86. For instance arm64 doesn't support MEMORY_HOTPLUG yet as such although we try to enabe it generically arm64 doesn't have it yet, so we leave the xen specific kconfig option XEN_BALLOON_MEMORY_HOTPLUG on x86's config file to set expecations correctly. Then on x86 we have differences between i386 and x86-64. The difference between 64-bit-config and 32-bit-config is you don't get XEN_MCE_LOG as this is only supported on 64-bit. You also do not get on i386 XEN_BALLOON_MEMORY_HOTPLUG, there does not seem to be any technical reasons to not allow this but I gave up after a few attempts. Cc: Josh Triplett <josh@...htriplett.org> Cc: Borislav Petkov <bp@...e.de> Cc: Pekka Enberg <penberg@...nel.org> Cc: David Rientjes <rientjes@...gle.com> Cc: Michal Marek <mmarek@...e.cz> Cc: Randy Dunlap <rdunlap@...radead.org> Cc: penberg@...nel.org Cc: levinsasha928@...il.com Cc: mtosatti@...hat.com Cc: fengguang.wu@...el.com Cc: David Vrabel <david.vrabel@...rix.com> Cc: Ian Campbell <Ian.Campbell@...rix.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> Cc: xen-devel@...ts.xenproject.org Acked-by: Stefano Stabellini <stefano.stabellini@...citrix.com> Acked-by: Julien Grall <julien.grall@...aro.org> Acked-by: Michal Marek <mmarek@...e.cz> Acked-by: David Rientjes <rientjes@...gle.com> Reviewed-by: Josh Triplett <josh@...htriplett.org> Signed-off-by: Luis R. Rodriguez <mcgrof@...e.com> --- arch/x86/configs/xen.config | 28 ++++++++++++++++++++++++++ kernel/configs/xen.config | 48 +++++++++++++++++++++++++++++++++++++++++++++ scripts/kconfig/Makefile | 5 +++++ 3 files changed, 81 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..d9fc713 --- /dev/null +++ b/arch/x86/configs/xen.config @@ -0,0 +1,28 @@ +# global x86 required specific stuff +# On 32-bit HIGHMEM4G is not allowed +CONFIG_HIGHMEM64G=y +CONFIG_64BIT=y + +# These enable us to allow some of the +# not so generic stuff below +CONFIG_HYPERVISOR_GUEST=y +CONFIG_PCI=y +CONFIG_PCI_MSI=y +CONFIG_X86_MCE=y +CONFIG_ACPI_PROCESSOR=y +CONFIG_CPU_FREQ=y + +# x86 xen specific config options +CONFIG_XEN_PVH=y +CONFIG_XEN_MAX_DOMAIN_MEMORY=500 +CONFIG_XEN_SAVE_RESTORE=y +# CONFIG_XEN_DEBUG_FS is not set +CONFIG_XEN_MCE_LOG=y +CONFIG_XEN_ACPI_PROCESSOR=m +# x86 specific backend drivers +CONFIG_XEN_PCIDEV_BACKEND=m +# x86 specific frontend drivers +CONFIG_XEN_PCIDEV_FRONTEND=m +# depends on MEMORY_HOTPLUG, arm64 doesn't enable this yet, +# move to generic config if it ever does. +CONFIG_XEN_BALLOON_MEMORY_HOTPLUG=y diff --git a/kernel/configs/xen.config b/kernel/configs/xen.config new file mode 100644 index 0000000..ff75622 --- /dev/null +++ b/kernel/configs/xen.config @@ -0,0 +1,48 @@ +# global stuff - these enable us to allow some +# of the not so generic stuff below for xen +CONFIG_PARAVIRT=y +CONFIG_NET=y +CONFIG_NET_CORE=y +CONFIG_NETDEVICES=y +CONFIG_BLOCK=y +CONFIG_WATCHDOG=y +CONFIG_TARGET_CORE=y +CONFIG_SCSI=y +CONFIG_FB=y +CONFIG_INPUT_MISC=y +CONFIG_MEMORY_HOTPLUG=y +CONFIG_TTY=y +# Technically not required but otherwise produces +# pretty useless systems starting from allnoconfig +# You want TCP/IP and ELF binaries right? +CONFIG_INET=y +CONFIG_BINFMT_ELF=y +# generic config +CONFIG_XEN=y +CONFIG_XEN_DOM0=y +# backend drivers +CONFIG_XEN_BACKEND=y +CONFIG_XEN_BLKDEV_BACKEND=m +CONFIG_XEN_NETDEV_BACKEND=m +CONFIG_HVC_XEN=y +CONFIG_XEN_WDT=m +CONFIG_XEN_SCSI_BACKEND=m +# frontend drivers +CONFIG_XEN_FBDEV_FRONTEND=m +CONFIG_HVC_XEN_FRONTEND=y +CONFIG_INPUT_XEN_KBDDEV_FRONTEND=m +CONFIG_XEN_SCSI_FRONTEND=m +# others +CONFIG_XEN_BALLOON=y +CONFIG_XEN_SCRUB_PAGES=y +CONFIG_XEN_DEV_EVTCHN=m +CONFIG_XEN_BLKDEV_FRONTEND=m +CONFIG_XEN_NETDEV_FRONTEND=m +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_PRIVCMD=m diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile index 6950032..f52abae 100644 --- a/scripts/kconfig/Makefile +++ b/scripts/kconfig/Makefile @@ -115,6 +115,10 @@ PHONY += kvmconfig kvmconfig: kvm_guest.config @: +PHONY += xenconfig +xenconfig: xen.config + @: + PHONY += tinyconfig tinyconfig: $(Q)$(MAKE) -f $(srctree)/Makefile allnoconfig tiny.config @@ -140,6 +144,7 @@ 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 -- 2.3.2.209.gd67f9d5.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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