linux-kernel - Re: [PATCH v4] x86/bhyve: Detect FreeBSD Bhyve hypervisor

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Message-ID: <aKL1Uj4R2Dj1pwB7@lx-t490>
Date: Mon, 18 Aug 2025 11:41:38 +0200
From: "Ahmed S. Darwish" <darwi@...utronix.de>
To: David Woodhouse <dwmw2@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	David Woodhouse <dwmw@...zon.co.uk>, linux-kernel@...r.kernel.org,
	Konstantin Belousov <kib@....kiev.ua>,
	John Baldwin <jhb@...ebsd.org>,
	"<cperciva@...snap.com>" <cperciva@...snap.com>
Subject: Re: [PATCH v4] x86/bhyve: Detect FreeBSD Bhyve hypervisor

On Sat, 16 Aug 2025, David Woodhouse wrote:
>
> Signed-off-by: David Woodhouse <dwmw@...zon.co.uk>
> ---
> Wheee, now actually tested under Bhyve.
>
> [    0.000000] Hypervisor detected: Bhyve
>
> v4:
>  • Add missing parens around (bhyve_cpuid_base | CPUID_BHYVE_FEATURES)
>  • Drop unneeded comment about x2apic support
>
> v3:
>  • Drop the cpuid_level check
>  • Define and use BHYVE_SIGNATURE
>  • Use the actual definition of CPUID_BHYVE_FEATURES and logical OR
>    instead of adding, as we do for other hypervisor leaves elsewhere
>  • Fix bhyve_cpuid_max miscalculation mistake
>

Thanks! For the CPUID bits:

Acked-by: Ahmed S. Darwish <darwi@...utronix.de>