linux-kernel - Re: [PATCH v5 3/5] ARM64: arch_timer: add support to configure and enable event stream

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Message-ID: <20130829112239.GE13704@arm.com>
Date:	Thu, 29 Aug 2013 12:22:39 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Sudeep KarkadaNagesha <Sudeep.KarkadaNagesha@....com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Will Deacon <Will.Deacon@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Daniel Lezcano <daniel.lezcano@...aro.org>
Subject: Re: [PATCH v5 3/5] ARM64: arch_timer: add support to configure and
 enable event stream

On Wed, Aug 28, 2013 at 11:44:47AM +0100, Sudeep KarkadaNagesha wrote:
>  static inline u64 arch_counter_get_cntvct(void)
> diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h
> index 6d4482f..530fa879 100644
> --- a/arch/arm64/include/asm/hwcap.h
> +++ b/arch/arm64/include/asm/hwcap.h
> @@ -30,6 +30,7 @@
>  #define COMPAT_HWCAP_IDIVA	(1 << 17)
>  #define COMPAT_HWCAP_IDIVT	(1 << 18)
>  #define COMPAT_HWCAP_IDIV	(COMPAT_HWCAP_IDIVA|COMPAT_HWCAP_IDIVT)
> +#define COMPAT_HWCAP_EVTSTRM	(1 << 21)
>  
>  #ifndef __ASSEMBLY__
>  /*
> @@ -37,11 +38,16 @@
>   * instruction set this cpu supports.
>   */
>  #define ELF_HWCAP		(elf_hwcap)
> -#define COMPAT_ELF_HWCAP	(COMPAT_HWCAP_HALF|COMPAT_HWCAP_THUMB|\
> +#ifdef CONFIG_COMPAT
> +#define COMPAT_ELF_HWCAP	(compat_elf_hwcap)
> +#define COMPAT_ELF_HWCAP_DEFAULT	\
> +				(COMPAT_HWCAP_HALF|COMPAT_HWCAP_THUMB|\
>  				 COMPAT_HWCAP_FAST_MULT|COMPAT_HWCAP_EDSP|\
>  				 COMPAT_HWCAP_TLS|COMPAT_HWCAP_VFP|\
>  				 COMPAT_HWCAP_VFPv3|COMPAT_HWCAP_VFPv4|\
>  				 COMPAT_HWCAP_NEON|COMPAT_HWCAP_IDIV)
> +extern unsigned int compat_elf_hwcap;
> +#endif

I think you can move the default to the setup.c file, it's not of any
use apart from initialisation.

-- 
Catalin
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