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SubjectRe: [patch V2 27/46] x86/xen: Rework MSI teardown
On 26.08.20 13:16, Thomas Gleixner wrote:
> From: Thomas Gleixner <>
> X86 cannot store the irq domain pointer in struct device without breaking
> XEN because the irq domain pointer takes precedence over arch_*_msi_irqs()
> fallbacks.
> XENs MSI teardown relies on default_teardown_msi_irqs() which invokes
> arch_teardown_msi_irq(). default_teardown_msi_irqs() is a trivial iterator
> over the msi entries associated to a device.
> Implement this loop in xen_teardown_msi_irqs() to prepare for removal of
> the fallbacks for X86.
> This is a preparatory step to wrap XEN MSI alloc/free into a irq domain
> which in turn allows to store the irq domain pointer in struct device and
> to use the irq domain functions directly.
> Signed-off-by: Thomas Gleixner <>

Reviewed-by: Juergen Gross <>


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