Hi all, this patch series implements Xen support for ARMv7 with virtualization extensions. It allows a Linux guest to boot as dom0 and as domU on Xen on ARM. PV console, disk and network frontends and backends are all working correctly.
It has been tested on a Versatile Express Cortex A15 emulator, using the latest Xen ARM developement branch (git://xenbits.xen.org/people/ianc/xen-unstable.git arm-for-4.3) plus the "ARM hypercall ABI: 64 bit ready" patch series (http://marc.info/?l=xen-devel&m=134426267205408), and a simple ad-hoc tool to build guest domains (marc.info/?l=xen-devel&m=134089788016546).
The patch marked with [HACK] shouldn't be applied and is part of the series only because it is needed to create domUs.
I am also attaching to this email the dts'es that I am currently using for dom0 and domU: vexpress-v2p-ca15-tc1.dts (that includes vexpress-v2m-rs1-rtsm.dtsi) is the dts used for dom0 and it is passed to Linux by Xen, while vexpress-virt.dts is the dts used for other domUs and it is appended in binary form to the guest kernel image. I am not sure where they are supposed to live yet, so I am just attaching them here so that people can actually try out this series if they want to.
Comments are very welcome!
Changes in v2: - fix up many comments and commit messages; - remove the early_printk patches: rely on the emulated serial for now; - remove the xen_guest_init patch: without any PV early_printk, we don't need any early call to xen_guest_init, we can rely on core_initcall alone; - define an HYPERCALL macro for 5 arguments hypercall wrappers, even if at the moment is unused; - use ldm instead of pop in the hypercall wrappers; - return -ENOSYS rather than -1 from the unimplemented grant_table functions; - remove the pvclock ifdef in the Xen headers; - remove include linux/types.h from xen/interface/xen.h; - replace pr_info with pr_debug in xen_guest_init; - add a new patch to introduce xen_ulong_t and use it top replace all the occurences of unsigned long in the public Xen interface; - explicitely size all the pointers to 64 bit on ARM, so that the hypercall ABI is "64 bit ready"; - clean up xenbus_init; - make pci.o depend on CONFIG_PCI and acpi.o depend on CONFIG_ACPI; - mark Xen guest support on ARM as EXPERIMENTAL; - introduce GRANT_TABLE_PHYSADDR; - remove unneeded initialization of boot_max_nr_grant_frames; - add a new patch to clear IRQ_NOAUTOEN and IRQ_NOREQUEST in events.c; - return -EINVAL from xen_remap_domain_mfn_range if auto_translated_physmap; - retain binary compatibility in xen_add_to_physmap: use a union to introduce foreign_domid.
Ian Campbell (1): [HACK] xen/arm: implement xen_remap_domain_mfn_range
Stefano Stabellini (22): arm: initial Xen support xen/arm: hypercalls xen/arm: page.h definitions xen/arm: sync_bitops xen/arm: empty implementation of grant_table arch specific functions xen: missing includes xen/arm: Xen detection and shared_info page mapping xen/arm: Introduce xen_pfn_t for pfn and mfn types xen/arm: Introduce xen_ulong_t for unsigned long xen/arm: compile and run xenbus xen: do not compile manage, balloon, pci, acpi and cpu_hotplug on ARM xen/arm: introduce CONFIG_XEN on ARM xen/arm: get privilege status xen/arm: initialize grant_table on ARM xen/arm: receive Xen events on ARM xen: clear IRQ_NOAUTOEN and IRQ_NOREQUEST xen/arm: implement alloc/free_xenballooned_pages with alloc_pages/kfree xen: allow privcmd for HVM guests xen/arm: compile blkfront and blkback xen/arm: compile netback xen: update xen_add_to_physmap interface arm/v2m: initialize arch_timers even if v2m_timer is not present
arch/arm/Kconfig | 10 ++ arch/arm/Makefile | 1 + arch/arm/include/asm/hypervisor.h | 6 + arch/arm/include/asm/sync_bitops.h | 27 +++ arch/arm/include/asm/xen/events.h | 18 ++ arch/arm/include/asm/xen/hypercall.h | 69 ++++++++ arch/arm/include/asm/xen/hypervisor.h | 19 +++ arch/arm/include/asm/xen/interface.h | 72 +++++++++ arch/arm/include/asm/xen/page.h | 79 +++++++++ arch/arm/mach-vexpress/v2m.c | 11 +- arch/arm/xen/Makefile | 1 + arch/arm/xen/enlighten.c | 237 ++++++++++++++++++++++++++++ arch/arm/xen/grant-table.c | 53 ++++++ arch/arm/xen/hypercall.S | 106 +++++++++++++ arch/ia64/include/asm/xen/interface.h | 6 +- arch/x86/include/asm/xen/interface.h | 8 + arch/x86/xen/enlighten.c | 1 + arch/x86/xen/irq.c | 1 + arch/x86/xen/mmu.c | 3 + arch/x86/xen/xen-ops.h | 1 - drivers/block/xen-blkback/blkback.c | 1 + drivers/net/xen-netback/netback.c | 1 + drivers/net/xen-netfront.c | 1 + drivers/tty/hvc/hvc_xen.c | 2 + drivers/xen/Makefile | 11 +- drivers/xen/events.c | 18 ++- drivers/xen/grant-table.c | 1 + drivers/xen/privcmd.c | 20 +-- drivers/xen/xenbus/xenbus_comms.c | 2 +- drivers/xen/xenbus/xenbus_probe.c | 62 +++++--- drivers/xen/xenbus/xenbus_probe_frontend.c | 1 + drivers/xen/xenbus/xenbus_xs.c | 1 + drivers/xen/xenfs/super.c | 7 + include/xen/events.h | 2 + include/xen/interface/features.h | 3 + include/xen/interface/grant_table.h | 4 +- include/xen/interface/io/protocols.h | 3 + include/xen/interface/memory.h | 32 +++-- include/xen/interface/physdev.h | 4 +- include/xen/interface/platform.h | 4 +- include/xen/interface/version.h | 2 +- include/xen/interface/xen.h | 13 +- include/xen/privcmd.h | 3 +- include/xen/xen.h | 2 +- 44 files changed, 857 insertions(+), 72 deletions(-)
A branch based on 3.5-rc7 is available here:
git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git 3.5-rc7-arm-2
Cheers,
Stefano