[Xen-devel] Routing physical interrupts to EL1

[Saeed Mirzamohammadi <saeed.mzmd@xxxxxxxxx>]

Hi,

I'm trying to route all the physical interrupts to the guest domain rather than being trapped in the Xen. I would like to know what is the right way to do that?

I know that HCR_IMO bit in the HCR_EL2 register is supposed to be for routing the interrupts to the guest (Routing to EL1 instead of EL2).

link to the datasheet: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0500d/CIHJHAAG.html

So, I have tried doing the following in the leave_hypervisor_tail. I run a simple hypercall and do the following lines before return (which is I guess the last point of exit to the guest from hypervisor):

---------------------

current->arch.hcr_el2 &= ~HCR_IMO;

WRITE_SYSREG(current->arch.hcr_el2, HCR_EL2);

isb();

----------------------

It looks like to be doing it right for all the vcpus but gets stuck after return from leave_hypervisor_tail for the last vcpu.

Any help is appreciated,

Thanks,

--

Saeed Mirzamohammadi

PhD Student
Department of Computer Science

University of California, Irvine

Irvine, CA 92617

saeed@xxxxxxx

http://www.ics.uci.edu/~saeed/

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