>>> On 22.09.16 at 17:04, <tianyu....@intel.com> wrote: > On 9/22/2016 10:26 PM, Jan Beulich wrote: >>>> But please also answer the earlier question, which you did strip >>>> >> from your reply: >>>> >> >>>>> >>> Which btw raises another question: Why are you in polling mode in >>>>> >>> the first place? Do you have a UART without working interrupt? >>> > >>> > I found there was no interrupt with Xen ns16550 dirver while >>> > linux kernel's serial driver can receive interrupt. >> And do you know the reason? Is it perhaps a PCI plug in card, and >> you don't specify the IRQ on the command line? Or the kernel >> doesn't provide the necessary information (from ACPI) for Xen to >> set up that IRQ? > > No, I am not familiar serial device. But it's a ACPI device from linux > sysfs node and serial drivers use irq 4 for their interrupt both on > linux and Xen.
Hmm - I do not see why IRQ4 would not work, especially if it does under Linux. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel