target/arm: Set PAN bit as required on exception entry
The PAN bit is preserved, or set as per SCTLR_ELx.SPAN, plus several other conditions listed in the ARM ARM. Signed-off-by: NRichard Henderson <richard.henderson@linaro.org> Reviewed-by: NPeter Maydell <peter.maydell@linaro.org> Message-id: 20200208125816.14954-15-richard.henderson@linaro.org Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
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