linux-kernel - Re: [patch V2 05/17] MIPS: vdso: Compile high resolution parts conditionally

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <8c0ee70a-2bb6-ebb3-05cf-ff305cbef70b@arm.com>
Date:   Fri, 14 Feb 2020 11:55:59 +0000
From:   Vincenzo Frascino <vincenzo.frascino@....com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, John Stultz <john.stultz@...aro.org>,
        Andy Lutomirski <luto@...nel.org>,
        Christophe Leroy <christophe.leroy@....fr>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Juergen Gross <jgross@...e.com>,
        Michael Kelley <mikelley@...rosoft.com>,
        Sasha Levin <sashal@...nel.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paulburton@...nel.org>,
        James Hogan <jhogan@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Marc Zyngier <maz@...nel.org>, Andrei Vagin <avagin@...il.com>
Subject: Re: [patch V2 05/17] MIPS: vdso: Compile high resolution parts
 conditionally

On 2/7/20 12:38 PM, Thomas Gleixner wrote:
> From: Thomas Gleixner <tglx@...utronix.de>
> 
> If neither the R4K nor the GIC timer is enabled in the kernel configuration
> then let the core VDSO code drop the high resolution parts at compile time.
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
>

Reviewed-by: Vincenzo Frascino <vincenzo.frascino@....com>

> ---
>  arch/mips/include/asm/vdso/gettimeofday.h |    7 +++++++
>  1 file changed, 7 insertions(+)
> 
> --- a/arch/mips/include/asm/vdso/gettimeofday.h
> +++ b/arch/mips/include/asm/vdso/gettimeofday.h
> @@ -199,6 +199,13 @@ static __always_inline u64 __arch_get_hw
>  	return cycle_now;
>  }
>  
> +static inline bool mips_vdso_hres_capable(void)
> +{
> +	return IS_ENABLED(CONFIG_CSRC_R4K) ||
> +	       IS_ENABLED(CONFIG_CLKSRC_MIPS_GIC);
> +}
> +#define __arch_vdso_hres_capable mips_vdso_hres_capable
> +
>  static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
>  {
>  	return get_vdso_data();
> 

-- 
Regards,
Vincenzo