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The xen_raw_printk works great for debugging purposes. We use for PV guests and we can also use it for HVM guests. However, for HVM guests we have a fallback of using the 0xe9 port in case the hypervisor does not support an HVM guest of using the console_io hypercall. As such lets use 0xe9 during early bootup, and once the hyper-page is setup and if the console_io hypercall is supported - use that. Otherwise we will fallback to using the 0xe9 after early bootup. We also alter the return value for dom0_write_console to return an error value instead of zero. The HVC API has been supporting returning error values for quite some time. P.S. To use (and to see the output in the Xen ring buffer) one has to build the hypervisor with 'debug=y'. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> [v1: ifdef xen_cpuid_base as it is X86 specific] |
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| .. | ||
| hvc_beat.c | ||
| hvc_bfin_jtag.c | ||
| hvc_console.c | ||
| hvc_console.h | ||
| hvc_dcc.c | ||
| hvc_irq.c | ||
| hvc_iucv.c | ||
| hvc_opal.c | ||
| hvc_rtas.c | ||
| hvc_tile.c | ||
| hvc_udbg.c | ||
| hvc_vio.c | ||
| hvc_xen.c | ||
| hvcs.c | ||
| hvsi_lib.c | ||
| hvsi.c | ||
| Kconfig | ||
| Makefile | ||