From: Christian Ehrhardt <ehrhardt@xxxxxxxxxxxxxxxxxx> This patch series implements a paravirtualization interface using: - the device tree mechanism to pass hypervisor informations to the guest - hypercalls for guest->host calls - an example exploiter of that interface (magic page) This is work in progress, but working so far. I just start to really exploit the fuctionality behind the magic page mechanism therefor I can't provide any performance improvements so far, but it is evolved enough for RFC and to start the standardization discussion. The used hypercall ABI was already discussed on the embedded-hypervisor mailing list and is available at http://kvm.qumranet.com/kvmwiki/PowerPC_Hypercall_ABI The device tree format used here (=base for the discussions on embedded-hypervisor) is the following. - A node "hypervisor" to show the general availability of some hypervisor data - flags for features like the example "feature,pv-magicpage" setting 1 = available, everything else = unavailable - Some features might need to pass more data and can use an entry in the device tree like the example of "data,pv-magicpage-size" Parties on cc: linuxppc-dev@xxxxxxxxxx The patches affect code in the generic powerpc boot&setup so I would be happy about comments if the hooks are ok that way. embedded-hypervisor@xxxxxxxxx This power.org TSC discusses about standardization of the virtualization interfaces. This patch series is perfectly suited due to it's simple changes to start the discussion about the device tree there. kvm-ppc@xxxxxxxxxxxxxxx The code is made for kvm on powerpc which lives on this list. [patches in series] Subject: [PATCH 1/6] kvmppc: read device tree hypervisor node infrastructure Providing the guest functionality to read hypervisor features from the device tree and adding the basic hook to the powerpc boot6setup code Subject: [PATCH 2/6] kvmppc: add hypercall infrastructure - host part Subject: [PATCH 3/6] kvmppc: add hypercall infrastructure - guest part patch 2&3 add the hypercall infrastruture as mentioned above Subject: [PATCH 4/6] kvmppc: magic page hypercall - host part Subject: [PATCH 5/6] kvmppc: magic page paravirtualization - guest part patch 4&5 add the magic page mechanism which will later on be used for binary rewriting the guest. Subject: [PATCH 6/6] kvmppc: kvm-userspace: device tree modification for magicpage This connects host and guest reading host capabilities and modifying the device tree passed to the guest accordingly --- [diffstat] arch/powerpc/kernel/kvm.c | 48 +++++++++++++++++++++++++++++++++++ arch/powerpc/kvm/emulate.c | 5 +++ b/arch/powerpc/kernel/Makefile | 2 + b/arch/powerpc/kernel/kvm.c | 30 +++++++++++++++++++++ b/arch/powerpc/kernel/setup_32.c | 3 ++ b/arch/powerpc/kvm/emulate.c | 27 +++++++++++++++++++ b/arch/powerpc/kvm/powerpc.c | 18 ++++++++++++- b/arch/powerpc/platforms/44x/Kconfig | 7 +++++ b/include/asm-powerpc/kvm_para.h | 37 ++++++++++++++++++++++++-- b/include/linux/kvm.h | 6 ++++ b/libkvm/libkvm-powerpc.c | 6 ++++ b/libkvm/libkvm.h | 6 ++++ b/qemu/hw/device_tree.c | 10 +++++++ b/qemu/hw/device_tree.h | 1 b/qemu/hw/ppc440_bamboo.c | 15 ++++++++++ b/qemu/qemu-kvm-powerpc.c | 5 +++ b/qemu/qemu-kvm.h | 1 include/asm-powerpc/kvm_para.h | 47 +++++++++++++++++++++++++++++++++- 18 files changed, 269 insertions(+), 5 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html