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Re: [Xen-devel] [PATCH] x86/boot: Simplify BSS zeroing

To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
From: Jan Beulich <jbeulich@xxxxxxxx>
Date: Wed, 8 Jan 2020 14:29:48 +0100
Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
Delivery-date: Wed, 08 Jan 2020 13:30:00 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 08.01.2020 14:22, Andrew Cooper wrote:
> There is no need to load a non-flat %es to zero the BSS.  Use sym_esi()
> instead, which is easier to follow, faster (avoids two segment loads) and
> doesn't require use of the stack.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>

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References:
- [Xen-devel] [PATCH] x86/boot: Simplify BSS zeroing
  - From: Andrew Cooper

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