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    SubjectRe: [PATCH -mm 2/2] kexec/i386: kexec page table code clean up - page table setup in C
    On Wed, Jan 09, 2008 at 10:57:50AM +0800, Huang, Ying wrote:
    > This patch transforms the kexec page tables setup code from asseumbler
    > code to iC code in machine_kexec_prepare. This improves readability and
    > reduces code line number.
    >

    I think this will create issues for Xen. Initially page table setup
    was in C but Xen Guests could not modify the page tables. I think Xen
    folks implemented a hypercall where they passed all the page table pages
    and the control pages and then hypervisor executed the control page(which
    in turn setup the page tables). I think that's why page table setup
    code is on the control page in assembly.

    You might want to go through Xen kexec implementation and dig through
    kexec mailing list archive.

    CCing Magnus and Horms. They had done the page tables related changes
    for Xen.

    Thanks
    Vivek


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