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

[Juergen Gross <jgross@xxxxxxxx>]

On 08/05/18 11:23, Roger Pau Monne wrote:
> Hello,
> 
> 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(-)
> 

I guess this is 4.11 material?


Juergen

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