linux-kernel - Re: [PATCH v2 3/5] x86: drop 32-bit Xen PV guest code in update_task

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Message-ID: <8b5e9d9d-b55b-7af0-7ea7-f7130f6a1886@intel.com>
Date:   Fri, 4 Nov 2022 08:04:15 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Juergen Gross <jgross@...e.com>, linux-kernel@...r.kernel.org,
        xen-devel@...ts.xenproject.org, x86@...nel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH v2 3/5] x86: drop 32-bit Xen PV guest code in
 update_task_stack()

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@...ux.intel.com>