On Thu, 14 Nov 2019 at 15:47, Alexandru Elisei <alexandru.elisei@xxxxxxx> wrote:
> On 11/14/19 3:27 PM, Peter Maydell wrote:
> > The virt board doesn't do EL3 by default, but if you add -machine secure=true
> > to your command line then it it should emulate it, including a
> > trustzone-aware GIC.
> Indeed, and that made the test fail because apparently qemu implements it as
> RAZ/WI (which is allowed by the architecture). Thank you for the suggestion!
Hmm. The behaviour QEMU thinks it's implementing is:
* if we have only one security state, then CTLR.DS is RAO/WI
* if we have two security states, then:
- for access from NonSecure, CTLR.DS is RAZ/WI
- for access from Secure, CTLR.DS is initially 0, and is
writeable, but if you write 1 to it then the only way
to get it to go back to zero is to reset the system
thanks
-- PMM
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