Messages in this thread | | | Subject | Re: [RFC PATCH v2 1/1] platform-msi: Add platform check for subdevice irq domain | From | Lu Baolu <> | Date | Thu, 7 Jan 2021 09:55:02 +0800 |
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On 1/7/21 12:01 AM, Leon Romanovsky wrote: > On Wed, Jan 06, 2021 at 11:23:39AM -0400, Jason Gunthorpe wrote: >> On Wed, Jan 06, 2021 at 12:40:17PM +0200, Leon Romanovsky wrote: >> >>> I asked what will you do when QEMU will gain needed functionality? >>> Will you remove QEMU from this list? If yes, how such "new" kernel will >>> work on old QEMU versions? >> >> The needed functionality is some VMM hypercall, so presumably new >> kernels that support calling this hypercall will be able to discover >> if the VMM hypercall exists and if so superceed this entire check. > > Let's not speculate, do we have well-known path?
All these (hypercall detect and invoke) will be done in pci_subdevice_msi_create_irq_domain(). It will be transparent to the callers.
> Will such patch be taken to stable@/distros?
It will not be taken to stable. For distros, it depends. They can backport if they want to support the feature.
Best regards, baolu
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