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Re: [PATCH v2 3/5] x86: drop 32-bit Xen PV guest code in update_task_stack()

To: Juergen Gross <jgross@xxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, x86@xxxxxxxxxx
From: Dave Hansen <dave.hansen@xxxxxxxxx>
Date: Fri, 4 Nov 2022 08:04:15 -0700
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>
Delivery-date: Fri, 04 Nov 2022 15:04:23 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 11/4/22 00:26, Juergen Gross wrote:
> Testing for Xen PV guest mode in a 32-bit only code section can be
> dropped, as Xen PV guests are supported in 64-bit mode only.
> 
> While at it switch from boot_cpu_has() to cpu_feature_enabled() in the
> 64-bit part of the code.

Acked-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>

References:
- [PATCH v2 0/5] x86: Switch X86_FEATURE_XENPV to cpu_feature_enabled() use
  - From: Juergen Gross
- [PATCH v2 3/5] x86: drop 32-bit Xen PV guest code in update_task_stack()
  - From: Juergen Gross

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