[PATCH RFC 0/4] xen/pvhvm: fix shared_info and pirq issues with kexec

[Vitaly Kuznetsov <vkuznets@redhat.com>]

With this patch series I'm trying to address several issues with kexec on pvhvm:
- shared_info issue (1st patch, just sending Olaf's work with Konrad's fix)
- create specific pvhvm shutdown handler for kexec (2nd patch)
- GSI PIRQ issue (3rd patch, I'm pretty confident that it does the right thing)
- MSI PIRQ issue (4th patch, and I'm not sure it doesn't break anything -> RFC)

This patch series can be tested on single vCPU guest. We still have SMP issues with
pvhvm guests and kexec which require additional fixes.

Olaf Hering (1):
  xen PVonHVM: use E820_Reserved area for shared_info

Vitaly Kuznetsov (3):
  xen/pvhvm: Introduce xen_pvhvm_kexec_shutdown()
  xen/pvhvm: Unmap all PIRQs on startup and shutdown
  xen/pvhvm: Make MSI IRQs work after kexec

 arch/x86/pci/xen.c               |  3 +-
 arch/x86/xen/enlighten.c         | 83 +++++++++++++++++++++++++++++++---------
 arch/x86/xen/smp.c               | 10 +++++
 arch/x86/xen/smp.h               |  1 +
 arch/x86/xen/suspend.c           |  2 +-
 arch/x86/xen/xen-ops.h           |  2 +-
 drivers/xen/events/events_base.c | 76 ++++++++++++++++++++++++++++++++++++
 include/xen/events.h             |  3 ++
 8 files changed, 158 insertions(+), 22 deletions(-)

-- 
1.9.3