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Commit2fae6bb7be("xen/privcmd: Add new syscall to get gsi from dev") adds a weak reverse dependency to the config XEN_PRIVCMD definition, that dependency causes xen-privcmd can't be loaded on domU, because dependent xen-pciback isn't always be loaded successfully on domU. To solve above problem, remove that dependency, and do not call pcistub_get_gsi_from_sbdf() directly, instead add a hook in drivers/xen/apci.c, xen-pciback register the real call function, then in privcmd_ioctl_pcidev_get_gsi call that hook. Fixes:2fae6bb7be("xen/privcmd: Add new syscall to get gsi from dev") Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> Signed-off-by: Jiqian Chen <Jiqian.Chen@amd.com> Reviewed-by: Juergen Gross <jgross@suse.com> Message-ID: <20241012084537.1543059-1-Jiqian.Chen@amd.com> Signed-off-by: Juergen Gross <jgross@suse.com>