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Re: [PATCH 1/3] xen: rework xen_pv_domain()
- To: Juergen Gross <jgross@xxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>, <x86@xxxxxxxxxx>
- From: Jason Andryuk <jason.andryuk@xxxxxxx>
- Date: Wed, 27 Aug 2025 09:59:01 -0400
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- Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, "Oleksandr Tyshchenko" <oleksandr_tyshchenko@xxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 27 Aug 2025 13:58:39 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 2025-08-26 10:56, Juergen Gross wrote:
Rework xen_pv_domain() to no longer use the xen_domain_type variable,
but the artificial X86_FEATURE_XENPV cpu feature.
On non-x86 architectures xen_pv_domain() can be defined as "0".
This has the advantage that a kernel not built with CONFIG_XEN_PV
will be smaller due to dead code elimination.
Set the X86_FEATURE_XENPV feature very early, as xen_pv_domain() is
used rather early, too.
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Reviewed-by: Jason Andryuk <jason.andryuk@xxxxxxx>
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