On Wed, 8 Feb 2017, Bhupinder Thakur wrote: > Hi Julien, > > On 3 February 2017 at 19:38, Julien Grall <julien.gr...@arm.com> wrote: > > So if I understand correctly, you don't receive anymore output. Correct? > > Have you tried to see whether the pl011 driver is receiving interrupt or > > even Linux calling it. > > The pl011 driver is not receiving the interrupts (I put a > HYPERVISOR_console_io() call inside the interrupt handler and I do not > see the print on the xen console) . When the console is in this state, > if I keep typing the characters on the console then Xen keeps raising > the interrupts (for each character typed) but all those interrupts are > marked as inflight. So it seems that interrupt is not getting cleared > in GIC. Which GIC function can I look at to further debug what is the > issue? > > Earlier, when I used to manually write characters to /dev/ttyAMA0 then > I used to receive the interrupts all fine.
DomU doesn't get emulated PL011 interrupts from Xen? Make sure you don't mark the interrupt as a real hardware interrupt by mistake (GICH_V2_LR_HW). At the same time, check that the virtual PL011 interrupt has been added correctly to the LRs (xen/arch/arm/gic-v2.c:gicv2_update_lr). _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
