linux-kernel - Re: [PATCH v13 02/10] arm64: Add more test functions to insn.c

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Date:	Wed, 8 Jun 2016 10:14:01 +0900
From:	Masami Hiramatsu <mhiramat@...nel.org>
To:	David Long <dave.long@...aro.org>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	Huang Shijie <shijie.huang@....com>,
	James Morse <james.morse@....com>,
	Marc Zyngier <marc.zyngier@....com>,
	Pratyush Anand <panand@...hat.com>,
	Sandeepa Prabhu <sandeepa.s.prabhu@...il.com>,
	Will Deacon <will.deacon@....com>,
	William Cohen <wcohen@...hat.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Steve Capper <steve.capper@...aro.org>,
	Li Bin <huawei.libin@...wei.com>,
	Adam Buchbinder <adam.buchbinder@...il.com>,
	Alex Bennée <alex.bennee@...aro.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Christoffer Dall <christoffer.dall@...aro.org>,
	Daniel Thompson <daniel.thompson@...aro.org>,
	Dave P Martin <Dave.Martin@....com>,
	Jens Wiklander <jens.wiklander@...aro.org>,
	Jisheng Zhang <jszhang@...vell.com>,
	John Blackwood <john.blackwood@...r.com>,
	Mark Rutland <mark.rutland@....com>,
	Petr Mladek <pmladek@...e.com>,
	Robin Murphy <robin.murphy@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Vladimir Murzin <Vladimir.Murzin@....com>,
	Yang Shi <yang.shi@...aro.org>,
	Zi Shen Lim <zlim.lnx@...il.com>,
	yalin wang <yalin.wang2010@...il.com>,
	Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH v13 02/10] arm64: Add more test functions to insn.c

On Thu,  2 Jun 2016 23:26:16 -0400
David Long <dave.long@...aro.org> wrote:
> @@ -367,6 +402,7 @@ bool aarch32_insn_is_wide(u32 insn);
>  #define A32_RT_OFFSET	12
>  #define A32_RT2_OFFSET	 0
>  
> +u32 aarch64_extract_system_register(u32 insn);

This exported symbol is incorrect (see below)

>  u32 aarch32_insn_extract_reg_num(u32 insn, int offset);
>  u32 aarch32_insn_mcr_extract_opc2(u32 insn);
>  u32 aarch32_insn_mcr_extract_crm(u32 insn);
> diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c
> index 368c082..28c6110f 100644
> --- a/arch/arm64/kernel/insn.c
> +++ b/arch/arm64/kernel/insn.c
[..]
> @@ -1175,6 +1201,14 @@ u32 aarch64_set_branch_offset(u32 insn, s32 offset)
>  	BUG();
>  }
>  
> +/*
> + * Extract the Op/CR data from a msr/mrs instruction.
> + */
> +u32 aarch64_insn_extract_system_reg(u32 insn)
> +{
> +	return (insn & 0x1FFFE0) >> 5;
> +}
> +

aarch64_insn_extract_system_reg() is the right name :)

Thank you,


>  bool aarch32_insn_is_wide(u32 insn)
>  {
>  	return insn >= 0xe800;
> -- 
> 2.5.0
> 


-- 
Masami Hiramatsu <mhiramat@...nel.org>