Re: [Qemu-devel] [PATCH v1 4/4] target-arm: Add CP15 VBAR support

[Sebastian Huber]

Hello,

it would be really nice to get the CP15 VBAR support integrated.  This allows 
unit test suites of single address space real-time systems to catch NULL 
pointer read/write access for example.

The ARM documentation says that this is a banked register that is only present 
in an implementation that includes the Security Extensions.  Is this equivalent 
to having TrustZone?

In the ID_PFR1, Processor Feature Register 1, the bits [4:7] indicate if a 
particular CPU has this feature.  Is it possible to use this register to 
determine the availability of the VBAR register in Qemu?  This may avoid adding 
a new enum arm_features.

--
Sebastian Huber, embedded brains GmbH

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