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  1. 02 11月, 2009 5 次提交
    • S
      x86: Use EOI register in io-apic on intel platforms · b3ec0a37
      由 Suresh Siddha 提交于 
      IO-APIC's in intel chipsets support EOI register starting from
IO-APIC version 2. Use that when ever we need to clear the
IO-APIC RTE's RemoteIRR bit explicitly.
Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
Acked-by: NGary Hade <garyhade@us.ibm.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
LKML-Reference: <20091026230001.947855317@sbs-t61.sc.intel.com>
[ Marked use_eio_reg as __read_mostly, fixed small details ]
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      b3ec0a37
    • S
      x86: Force irq complete move during cpu offline · a5e74b84
      由 Suresh Siddha 提交于 
      When a cpu goes offline, fixup_irqs() try to move irq's
currently destined to the offline cpu to a new cpu. But this
attempt will fail if the irq is recently moved to this cpu and
the irq still hasn't arrived at this cpu (for non intr-remapping
platforms this is when we free the vector allocation at the
previous destination) that is about to go offline.

This will endup with the interrupt subsystem still pointing the
irq to the offline cpu, causing that irq to not work any more.

Fix this by forcing the irq to complete its move (its been a
long time we moved the irq to this cpu which we are offlining
now) and then move this irq to a new cpu before this cpu goes
offline.
Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
Acked-by: NGary Hade <garyhade@us.ibm.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
LKML-Reference: <20091026230001.848830905@sbs-t61.sc.intel.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      a5e74b84
    • S
      x86: Remove move_cleanup_count from irq_cfg · 23359a88
      由 Suresh Siddha 提交于 
      move_cleanup_count for each irq in irq_cfg is keeping track of
the total number of cpus that need to free the corresponding
vectors associated with the irq which has now been migrated to
new destination. As long as this move_cleanup_count is non-zero
(i.e., as long as we have n't freed the vector allocations on
the old destinations) we were preventing the irq's further
migration.

This cleanup count is unnecessary and it is enough to not allow
the irq migration till we send the cleanup vector to the
previous irq destination, for which we already have irq_cfg's
move_in_progress.  All we need to make sure is that we free the
vector at the old desintation but we don't need to wait till
that gets freed.
Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
Acked-by: NGary Hade <garyhade@us.ibm.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
LKML-Reference: <20091026230001.752968906@sbs-t61.sc.intel.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      23359a88
    • S
      x86, intr-remap: Avoid irq_chip mask/unmask in fixup_irqs() for intr-remapping · 84e21493
      由 Suresh Siddha 提交于 
      In the presence of interrupt-remapping, irqs will be migrated in
the process context and we don't do (and there is no need to)
irq_chip mask/unmask while migrating the interrupt.

Similarly fix the fixup_irqs() that get called during cpu
offline and avoid calling irq_chip mask/unmask for irqs that are
ok to be migrated in the process context.

While we didn't observe any race condition with the existing
code, this change takes complete advantage of
interrupt-remapping in the newer generation platforms and avoids
any potential HW lockup's (that often worry Eric :)
Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
Acked-by: NEric W. Biederman <ebiederm@xmission.com>
Cc: garyhade@us.ibm.com
LKML-Reference: <20091026230001.661423939@sbs-t61.sc.intel.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      84e21493
    • S
      x86: Unify fixup_irqs() for 32-bit and 64-bit kernels · 7a7732bc
      由 Suresh Siddha 提交于 
      There is no reason to have different fixup_irqs() for 32-bit and
64-bit kernels. Unify by using the superior 64-bit version for
both the kernels.
Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: NGary Hade <garyhade@us.ibm.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
LKML-Reference: <20091026230001.562512739@sbs-t61.sc.intel.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      7a7732bc
  3. 27 10月, 2009 1 次提交
  5. 15 10月, 2009 1 次提交
    • C
      x86: apic: Allow noop operations to be called almost at any time · f88f2b4f
      由 Cyrill Gorcunov 提交于 
      As only apic noop is used we allow to use almost any operation
caller wants (and which of them noop driver supports of
course).

Initially it was reported by Ingo Molnar that apic noop
issue a warning for pkg id (which is actually false positive
and should be eliminated).

So we save checking (and warning issue) for read/write
operations while allow any other ops to be freely used.

Also:
 - fix noop_cpu_to_logical_apicid, it should be 0.
 - rename noop_default_phys_pkg_id to noop_phys_pkg_id
   (we use default_ prefix for more general routines
    in apic subsystem).
Reported-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NCyrill Gorcunov <gorcunov@openvz.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
LKML-Reference: <20091015150416.GC5331@lenovo>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      f88f2b4f
  7. 14 10月, 2009 16 次提交
  9. 13 10月, 2009 17 次提交