Re: [PATCH iommufd v2 8/9] irq/s390: Add arch_is_isolated_msi() for s390

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On Thu, Dec 15, 2022 at 07:39:25AM +0000, Tian, Kevin wrote:
> > From: Jason Gunthorpe <jgg@xxxxxxxxxx>
> > Sent: Tuesday, December 13, 2022 2:46 AM
> > @@ -660,7 +664,7 @@ static inline bool msi_device_has_isolated_msi(struct
> > device *dev)
> >  	 * is inherently isolated by our definition. As nobody seems to needs
> >  	 * this be conservative and return false anyhow.
> 
> Also update the comment given the returned value is arch specific
> now.

	/*
	 * Arguably if the platform does not enable MSI support then it has
	 * "isolated MSI", as an interrupt controller that cannot receive MSIs
	 * is inherently isolated by our definition. The default definition for
	 * arch_is_isolated_msi() is conservative and returns false anyhow.
	 */

Jason



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