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Re: [Qemu-devel] [PATCH v7 05/32] target-arm: make arm_current_el() retu
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From: |
Richard Henderson |
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Subject: |
Re: [Qemu-devel] [PATCH v7 05/32] target-arm: make arm_current_el() return EL3 |
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Date: |
Mon, 19 Jan 2015 11:30:51 -0800 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 |
On 01/19/2015 11:00 AM, Peter Maydell wrote:
> Alternatively (better!), for a lot of the tlb_flush()es triggered
> by target-arm code we could be more precise about the affected
> mmu_idx values, since the common case is going to be
> "NS EL1 did something that needs a TLB flush", and by definition
> that can't affect TLB entries for EL2, EL3 or S-EL1/EL0.
>
> So I think my preference would be to use 7 mmu indexes,
> and add a tlb_flush_mmuidx() function. (Assuming I'm
> not missing anything that makes that not workable...)
That new interface does seem very reasonable.
As to whether you've missed something in the ARM semantics,
I guess we'll find out. ;-)
r~