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Re: [Qemu-arm] [PATCH v1 8/9] target-arm: A64: Create Instruction Syndro

From: Peter Maydell
Subject: Re: [Qemu-arm] [PATCH v1 8/9] target-arm: A64: Create Instruction Syndromes for Data Aborts
Date: Tue, 16 Feb 2016 19:13:32 +0000

On 12 February 2016 at 14:34, Edgar E. Iglesias
<address@hidden> wrote:
> From: "Edgar E. Iglesias" <address@hidden>
> Add support for generating the instruction syndrome for Data Aborts.
> These syndromes are used by hypervisors for example to trap and emulate
> memory accesses.
> We save the decoded data out-of-band with the TBs at translation time.
> When exceptions hit, the extra data attached to the TB is used to
> recreate the state needed to encode instruction syndromes.
> This avoids the need to emit moves with every load/store.

I think this patch also would be simpler if the encoded info
put in with the TBs was just the syndrome register, rather
than some other encoding.

-- PMM

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