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Re: [PATCH] x86emul: prune an excess EVEX.Z check
- To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Mon, 20 Jul 2026 15:19:18 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>
- Delivery-date: Mon, 20 Jul 2026 14:19:33 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 17/07/2026 3:06 pm, Jan Beulich wrote:
> DstMem processing early in x86_emulate() raises #UD when EVEX.Z is set
> with a memory destination. Open-coded checks like this one are therefore
> dead / unreachable code, violating Misra rules.
>
> Fixes: 4037a62ef93e ("x86emul: support AVX512F floating-point conversion
> insns")
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
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