[lkml]   [2009]   [May]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [GIT PULL] Xen APIC hooks (with io_apic_ops)

    * Jeremy Fitzhardinge <> wrote:

    > Hi Ingo,
    > Here's a revised set of the Xen APIC changes which adds
    > io_apic_ops to allow Xen to intercept IO APIC access operations.

    In a previous discussion you said:

    > IO APIC operations are not even slightly performance critical? Are
    > they ever used on the interrupt delivery path?

    Since they are not performance critical, then why doesnt Xen catch
    the IO-APIC accesses, and virtualizes the device?

    If you want to hook into the IO-APIC code at such a low level, why
    dont you hook into the _hardware_ API - i.e. catch those
    setup/routing modifications to the IO-APIC space. No Linux changes
    are needed in that case.


     \ /
      Last update: 2009-05-19 14:39    [W:0.019 / U:7.816 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site