Re: [PATCH 3/9] xen/x86: make "earlyprintk=xen" work better for PVH Dom0

2021-09-23 Thread Juergen Gross
On 07.09.21 12:09, Jan Beulich wrote: The xen_hvm_early_write() path better wouldn't be taken in this case; while port 0xE9 can be used, the hypercall path is quite a bit more efficient. Put that first, as it may also work for DomU-s (see also xen_raw_console_write()). While there also bail from

[PATCH 3/9] xen/x86: make "earlyprintk=xen" work better for PVH Dom0

2021-09-07 Thread Jan Beulich
The xen_hvm_early_write() path better wouldn't be taken in this case; while port 0xE9 can be used, the hypercall path is quite a bit more efficient. Put that first, as it may also work for DomU-s (see also xen_raw_console_write()). While there also bail from the function when the first domU_write_