Re: [Xen-devel] [PATCH] x86/MSI-X: correctly track interrupt masking state

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 22.04.16 at 18:35, <andrew.cooper3@xxxxxxxxxx> wrote:
> On 22/04/16 08:20, Jan Beulich wrote:
>> When a guest unmasks MSI-X interrupts before enabling MSI-X on the
>> device, so far nothing updates the {host,guest}_masked internal state;
>> this to date only gets done when MSI-X is already enabled. This is why
>> half way recent Linux works (as it enables MSI-X first), while Windows
>> doesn't (as it enables MSI-X only after having set up und unmasked all
>> vectors). Since with a successful write to the vector control field
>> everything is ready internally, we should also update internal tracking
>> state there, regardless of the device's MSI-X enabled state.
>>
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> 
> Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Wei,

just noticed I forgot to Cc you on this one, which definitely is
intended for 4.7 (along with the other two MSI related ones).

Jan


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