Date:   Tue, 16 Nov 2021 17:24:33 +0100
From:   Borislav Petkov <bp@alien8.de>
To:     Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@linux.intel.com>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org,
        "H . Peter Anvin" <hpa@zytor.com>, Tony Luck <tony.luck@intel.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Andi Kleen <ak@linux.intel.com>,
        Kirill Shutemov <kirill.shutemov@linux.intel.com>,
        Kuppuswamy Sathyanarayanan <knsathya@kernel.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 1/1] x86: Skip WBINVD instruction for VM guest
Message-ID: <YZPbQVwWOJCrAH78@zn.tnic>
References: <20211116005027.2929297-1-sathyanarayanan.kuppuswamy@linux.intel.com>
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On Mon, Nov 15, 2021 at 04:50:27PM -0800, Kuppuswamy Sathyanarayanan wrote:
> -#define ACPI_FLUSH_CPU_CACHE()	wbinvd()
> +#define ACPI_FLUSH_CPU_CACHE()				\
> +do {							\
> +	if (!boot_cpu_has(X86_FEATURE_HYPERVISOR))	\

cpu_feature_enabled()

If you wanna query a X86_FEATURE_* bit, from now on, use only this
function.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette