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Re: [PATCH 3/7] x86/HVM: remove unused MMIO handling code
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 11 Sep 2024 11:08:59 +0200
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 11 Sep 2024 09:09:04 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 10.09.2024 20:08, Andrew Cooper wrote:
> On 10/09/2024 3:40 pm, Jan Beulich wrote:
>> All read accesses are rejected by the ->accept handler, while writes
>> bypass the bulk of the function body. Drop the dead code, leaving an
>> assertion in the read handler.
>>
>> A number of other static items (and a macro) are then unreferenced and
>> hence also need (want) dropping. The same applies to the "latch" field
>> of the state structure.
>>
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>
> In the read handler, I don't think we need to fill in ~0. A while back,
> we had the base layer fill this in, to fix stack rubble leaks.
It fills something, yes, but 0, not ~0. Plus I was trying to make obvious
by just looking at the function that nothing unexpected can happen even
in release builds, if the function was really called in error.
> Either way,
>
> Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Thanks.
Jan
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