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Re: [Qemu-devel] [PATCH 16/19] target/arm: Handle banking in negative-ex


From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH 16/19] target/arm: Handle banking in negative-execution-priority check in cpu_mmu_index()
Date: Wed, 20 Sep 2017 12:35:36 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0

On 09/12/2017 01:14 PM, Peter Maydell wrote:
> Now that we have a banked FAULTMASK register and banked exceptions,
> we can implement the correct check in cpu_mmu_index() for whether
> the MPU_CTRL.HFNMIENA bit's effect should apply. This bit causes
> handlers which have requested a negative execution priority to run
> with the MPU disabled. In v8M the test has to check this for the
> current security state and so takes account of banking.
> 
> Signed-off-by: Peter Maydell <address@hidden>
> ---
>  target/arm/cpu.h      | 21 ++++++++++++++++-----
>  hw/intc/armv7m_nvic.c | 29 +++++++++++++++++++++++++++++
>  2 files changed, 45 insertions(+), 5 deletions(-)

Reviewed-by: Richard Henderson <address@hidden>

r~




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