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[Xen-devel] [PATCH 0/2] vpci/msi: fix updating already bound MSI interrupts


There's a bug in current vpci code for MSI emulation when updating an
already bound interrupt. The code will disable and enable the interrupt
in order to update the binding, which calls unmap_domain_pirq that
disables the global MSI enable flag in the control register.

In order to fix this incorrect behavior introduce a new update helper
that should be used to update the bindings of an already enabled group
of MSI interrupts.

Thanks, Roger.

Roger Pau Monne (2):
  vpci/msi: split code to bind pirq
  vpci/msi: fix update of bound MSI interrupts

 xen/arch/x86/hvm/vmsi.c | 96 +++++++++++++++++++++++++++++------------
 xen/drivers/vpci/msi.c  |  3 +-
 xen/include/xen/vpci.h  |  2 +
 3 files changed, 71 insertions(+), 30 deletions(-)


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