Starting with Linux 4.18, there is new device node for issuing hypercalls from user space - /dev/xen/hypercall (partially duplicating functionality of /dev/xen/privcmd). New Xen tools (4.12) make use of it, so make it available for them. Otherwise such tools will fail the operation (there is no fallback to privcmd on EACCESS).pull/39/head mm_4fe08d31
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