svn commit: r194985 - in head/sys: amd64/amd64 amd64/include
jhb at freebsd.org
Thu Jun 25 18:52:18 UTC 2009
On Thursday 25 June 2009 2:13:46 pm John Baldwin wrote:
> Author: jhb
> Date: Thu Jun 25 18:13:46 2009
> New Revision: 194985
> URL: http://svn.freebsd.org/changeset/base/194985
> - Restore the behavior of pre-allocating IDT vectors for MSI interrupts.
> This is mostly important for the multiple MSI message case where the
> IDT vectors for the entire group need to be allocated together. This
> also restores the assumptions made by the PCI bus code that it could
> invoke PCIB_MAP_MSI() once MSI vectors were allocated.
> - To avoid whiplash with CPU assignments, change the way that CPUs are
> assigned to interrupt sources on activation. Instead of assigning the
> CPU via pic_assign_cpu() before calling enable_intr(), allow the
> different interrupt source drivers to ask the MD interrupt code which
> CPU to use when they allocate an IDT vector. I/O APIC interrupt pins
> do this in their pic_enable_intr() routines giving the same behavior as
> before. MSI sources do it when the IDT vectors are allocated during
> msi_alloc() and msix_alloc().
> - Change the intr_table_lock from an sx lock to a mutex.
Incidentally, this fixes the remaining issues Robert was having with VT switch
with Intel DRM drivers. It is still not possible to migrate multiple MSI
interrupts, but I intend to work on that next.
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