linux-kernel - Re: [PATCHv2 05/29] x86/tdx: Add HLT support for TDX guests

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Message-ID: <YfVU01dBD36H0EIv@zn.tnic>
Date:   Sat, 29 Jan 2022 15:53:07 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     tglx@...utronix.de, mingo@...hat.com, dave.hansen@...el.com,
        luto@...nel.org, peterz@...radead.org,
        sathyanarayanan.kuppuswamy@...ux.intel.com, aarcange@...hat.com,
        ak@...ux.intel.com, dan.j.williams@...el.com, david@...hat.com,
        hpa@...or.com, jgross@...e.com, jmattson@...gle.com,
        joro@...tes.org, jpoimboe@...hat.com, knsathya@...nel.org,
        pbonzini@...hat.com, sdeep@...are.com, seanjc@...gle.com,
        tony.luck@...el.com, vkuznets@...hat.com, wanpengli@...cent.com,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2 05/29] x86/tdx: Add HLT support for TDX guests

On Mon, Jan 24, 2022 at 06:01:51PM +0300, Kirill A. Shutemov wrote:
> @@ -870,6 +871,10 @@ void select_idle_routine(const struct cpuinfo_x86 *c)
>  	} else if (prefer_mwait_c1_over_halt(c)) {
>  		pr_info("using mwait in idle threads\n");
>  		x86_idle = mwait_idle;
> +	} else if (cpu_feature_enabled(X86_FEATURE_TDX_GUEST)) {
> +		pr_info("using TDX aware idle routine\n");
> +		x86_idle = tdx_safe_halt;
> +		return;

Forgot to remove that "return".

-- 
Regards/Gruss,
    Boris.

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