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  1. 11 5月, 2011 1 次提交
    • S
      xen: do not clear and mask evtchns in __xen_evtchn_do_upcall · 7e186bdd
      由 Stefano Stabellini 提交于 
      Change the irq handler of evtchns and pirqs that don't need EOI (pirqs
that correspond to physical edge interrupts) to handle_edge_irq.

Use handle_fasteoi_irq for pirqs that need eoi (they generally
correspond to level triggered irqs), no risk in loosing interrupts
because we have to EOI the irq anyway.

This change has the following benefits:

- it uses the very same handlers that Linux would use on native for the
same irqs (handle_edge_irq for edge irqs and msis, and
handle_fasteoi_irq for everything else);

- it uses these handlers in the same way native code would use them: it
let Linux mask\unmask and ack the irq when Linux want to mask\unmask
and ack the irq;

- it fixes a problem occurring when a driver calls disable_irq() in its
handler: the old code was unconditionally unmasking the evtchn even if
the irq is disabled when irq_eoi was called.

See Documentation/DocBook/genericirq.tmpl for more informations.
Signed-off-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com>
[v1: Fixed space/tab issues]
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      7e186bdd
  3. 20 4月, 2011 1 次提交
  5. 12 4月, 2011 1 次提交
    • R
      PM / Hibernate: Introduce CONFIG_HIBERNATE_CALLBACKS · 1f112cee
      由 Rafael J. Wysocki 提交于 
      Xen save/restore is going to use hibernate device callbacks for
quiescing devices and putting them back to normal operations and it
would need to select CONFIG_HIBERNATION for this purpose.  However,
that also would cause the hibernate interfaces for user space to be
enabled, which might confuse user space, because the Xen kernels
don't support hibernation.  Moreover, it would be wasteful, as it
would make the Xen kernels include a substantial amount of code that
they would never use.

To address this issue introduce new power management Kconfig option
CONFIG_HIBERNATE_CALLBACKS, such that it will only select the code
that is necessary for the hibernate device callbacks to work and make
CONFIG_HIBERNATION select it.  Then, Xen save/restore will be able to
select CONFIG_HIBERNATE_CALLBACKS without dragging the entire
hibernate code along with it.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Tested-by: NShriram Rajagopalan <rshriram@cs.ubc.ca>
      1f112cee
  7. 31 3月, 2011 2 次提交
  9. 29 3月, 2011 4 次提交
  11. 24 3月, 2011 2 次提交
  13. 17 3月, 2011 2 次提交
  15. 16 3月, 2011 5 次提交
  17. 14 3月, 2011 4 次提交
  19. 11 3月, 2011 18 次提交