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A GICv2 has both GICC_APR<n> and GICC_NSAPR<n> registers, with the latter holding the active priority bits for Group 1 interrupts (usually Nonsecure interrupts), and the Nonsecure view of the GICC_APR<n> is the second half of the GICC_NSAPR<n> registers. Turn our half-hearted implementation of APR<n> into a proper implementation of both APR<n> and NSAPR<n>: * Add the underlying state for NSAPR<n> * Make sure APR<n> aren't visible for pre-GICv2 * Implement reading of NSAPR<n> * Make non-secure reads of APR<n> behave correctly * Implement writing to APR<n> and NSAPR<n> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1438089748-5528-4-git-send-email-peter.maydell@linaro.org