[PATCH 2/3] KVM: arm/arm64: Add ARM arch timer interrupts ABI

On Tue, Nov 01 2016 at 02:54:11 PM, Peter Maydell [off-list ref] wrote:

On 1 November 2016 at 14:50, Christoffer Dall
[off-list ref] wrote:

quoted

On Tue, Nov 01, 2016 at 11:26:54AM +0000, Peter Maydell wrote:

quoted

Possible current and future outbound interrupt lines (some of these
would only show up in some unlikely or lots-of-implementation-needed
cases, I'm just trying to produce an exhaustive list):
 * virtual timer
 * physical timer
 * hyp timer (nested virtualization case)
 * secure timer (unlikely but maybe if EL3 is ever supported inside a VM)
 * gic maintenance interrupt (nested virt again)
 * PMU interrupt

Thanks for the list, that's good to have around for the future.

There's also the potential of the EL2 virtual timer for nested VHE
support, right?

That's the one I meant by "hyp timer".

VHE also adds an extra virtual timer, for symmetry with what EL1
provides (and on which CNTVOFF doesn't have any effect) - see section
B8.1.1 of the ARMv8.1 addendum. So we effectively have:

- Secure physical EL3
- Non-secure physical EL1
- Non-secure virtual EL1
- Non-secure physical EL2
- Non-secure virtual EL2

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny.