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Re: [Qemu-devel] [PATCH 1/3] tcg: Support MMU protection regions smaller

From: Peter Maydell
Subject: Re: [Qemu-devel] [PATCH 1/3] tcg: Support MMU protection regions smaller than TARGET_PAGE_SIZE
Date: Sat, 30 Jun 2018 21:10:02 +0100

On 30 June 2018 at 21:08, Peter Maydell <address@hidden> wrote:
> On 30 June 2018 at 20:42, Max Filippov <address@hidden> wrote:
>> On Sat, Jun 30, 2018 at 12:20 PM, Max Filippov <address@hidden> wrote:
>>> I'm observing the following failure with xtensa tests:
>>> (qemu) qemu: fatal: Unable to handle guest executing from RAM within a
>>> small MPU region at 0xd0000804
>>> Bisection points to this patch. Any idea what happened?
>> Ok, I think I've found the issue: the following check in the
>> get_page_addr_code does not work correctly when -1 is in the
>> addr_code in the QEMU TLB:
>> if (unlikely(env->tlb_table[mmu_idx][index].addr_code & TLB_RECHECK))
> Yes, Laurent ran into that and I sent a fix out on Friday:
> http://patchwork.ozlabs.org/project/qemu-devel/list/?series=52914

...oh, no, wait, you've hit the other bug I sent a fix for:

-- PMM

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