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    Subject[PATCH 0/7][v5] PV extension of HVM (Hybrid) for Xen
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    Hi, Jeremy & Ian

    Here is the fifth version of patchset to enable PV extension of HVM support
    in Linux kernel of Xen.

    The PV extension of HVM is started from real mode like HVM guest, but also with a
    a range of PV features(e.g. PV timer, event channel, as well as PV
    drivers). So guest with this feature can takes the advantages of both H/W
    virtualization and Para-Virtualization.

    The first two of the patchset imported several header file from Jeremy's tree
    and Xen tree, respect to Jeremy and Keir's works.

    The whole patchset based on Linux upstream.

    You need a line like:

    cpuid = [ '0x40000002:edx=0x3' ]

    in HVM configuration file to expose hybrid feature to guest, and

    CONFIG_XEN

    in the guest kernel configuration file to enable the hybrid support.

    And the compiled image can be used as native/pv domU/hvm guest/pv feature hvm kernel.

    Current the patchset support x86_64 only.

    Current base is still on Linux 2.6.33.

    Change from v4:
    1. Add a new CONFIG_XEN_HVM_PV to enable the feature in kernel
    2. Separate the related code form enlighted.c to hvmpv.c
    3. Separate the feature "PV clocksource" from evtchn. Now we can support HVM
    guest with PV clocksource. This would be enabled by default.
    4. Drop PV halt and pv drivers in this edition. We can work on that
    later.
    5. Update the patchset following Jeremy's comments.

    Change from v3:
    1. Rebase to Linux 2.6.33 release.
    2. change the name to "PV extension of HVM"
    3. Some minor coding polishing.

    Change from v2:
    1. change the name "hybrid" to "PV featured HVM".
    2. Unified the PV driver's judgement of xen_domain() to xen_evtchn_enabled().
    3. Move the function(evtchn) initialize hypercall near the real enabling place,
    rather than a unified place before function enabled.
    4. Remove the reserved E820 region for grant table. Use QEmu Xen platform
    device's MMIO instead.

    The major change from v1:
    1. SMP support.
    2. Modify the entrance point to avoid most of genernic kernel modification.
    3. Binding PV timer with event channel mechanism.

    --
    regards
    Yang, Sheng

    arch/x86/include/asm/xen/cpuid.h | 73 +++++++++++
    arch/x86/include/asm/xen/hypercall.h | 6 +
    arch/x86/include/asm/xen/hypervisor.h | 6 +
    arch/x86/kernel/setup.c | 4 +
    arch/x86/xen/Kconfig | 8 ++
    arch/x86/xen/Makefile | 1 +
    arch/x86/xen/enlighten.c | 6 +-
    arch/x86/xen/hvmpv.c | 219 +++++++++++++++++++++++++++++++++
    arch/x86/xen/irq.c | 28 ++++
    arch/x86/xen/smp.c | 92 +++++++++++++-
    arch/x86/xen/time.c | 4 +-
    arch/x86/xen/xen-ops.h | 14 ++
    drivers/block/xen-blkfront.c | 2 +-
    drivers/input/xen-kbdfront.c | 2 +-
    drivers/net/xen-netfront.c | 2 +-
    drivers/video/xen-fbfront.c | 2 +-
    drivers/xen/events.c | 74 ++++++++++-
    drivers/xen/grant-table.c | 2 +-
    drivers/xen/xenbus/xenbus_probe.c | 4 +-
    include/xen/events.h | 6 +
    include/xen/hvm.h | 28 ++++
    include/xen/interface/hvm/hvm_op.h | 80 ++++++++++++
    include/xen/interface/hvm/params.h | 111 +++++++++++++++++
    include/xen/interface/xen.h | 6 +-
    include/xen/xen.h | 11 ++
    25 files changed, 768 insertions(+), 23 deletions(-)


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