Re: [Xen-devel] [PATCH] xen/hvc-console: Make it work with HVMguests.

[Konrad Rzeszutek Wilk]

On Fri, Sep 27, 2013 at 10:49:37PM +0100, Julien Grall wrote:
> On 09/27/2013 10:25 PM, Konrad Rzeszutek Wilk wrote:
> 
> >@@ -641,7 +641,20 @@ struct console xenboot_console = {
> >
> >  void xen_raw_console_write(const char *str)
> >  {
> >-	dom0_write_console(0, str, strlen(str));
> >+	ssize_t len = strlen(str);
> >+	int rc = 0;
> >+
> >+	if (xen_domain()) {
> >+		dom0_write_console(0, str, len);
> >+		if (rc == -ENOSYS && xen_hvm_domain())
> >+			goto outb_print;
> >+
> >+	} else if (xen_cpuid_base()) {
> >+		int i;
> >+outb_print:
> >+		for (i = 0; i < len; i++)
> >+			outb(str[i], 0xe9);
> >+	}
> >  }
> 
> xen_cpuid_base and outb(0xe9) is x86 specific and won't compile on ARM.

Odd, I see outb defined in arch/arm and arch/arm64 ?(arch/arm[|64]/include/asm.io.h)

You are of course right about xen_cpuid_base.

How about this: