[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [XEN PATCH 1/7] xen: introduce XENFEAT_xenstore_late_init
On 10/01/2022 22:55, Stefano Stabellini wrote: I have a patch for Linux that if XENFEAT_xenstore_late_init is present makes Linux wait for an event notification before initializing xenstore: https://marc.info/?l=xen-devel&m=164160299315589 So with v1 of the Xen and Linux patches series: - Xen allocates the event channel at domain creation - Linux boots, sees XENFEAT_xenstore_late_init and wait for an event - init-dom0less later allocates the xenstore page - init-dom0less triggers the xenstore event channel - Linux receives the event and finishes the initialization, including mapping the xenstore page You can get this behaviour without the new feature. - Xen allocates the event channel at domain creation- Linux boots, sees HVM_PARAM_STORE_PFN is invalid and there's a xenstore event channel and waits for an event - init-dom0less later allocates the xenstore page - init-dom0less triggers the xenstore event channel - Linux receives the event and finishes the initialization, including mapping the xenstore page- David
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