linux-kernel - Re: [RESEND PATCH v6 07/12] x86/fsgsbase/64: Introduce the FIND_PERCPU

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Message-ID: <89147C5F-4F1D-4E19-AF68-658F6F638B3C@intel.com>
Date:   Wed, 1 May 2019 13:52:51 +0000
From:   "Bae, Chang Seok" <chang.seok.bae@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
CC:     Ingo Molnar <mingo@...nel.org>, Andy Lutomirski <luto@...nel.org>,
        "H . Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...ux.intel.com>,
        "Shankar, Ravi V" <ravi.v.shankar@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "Dave Hansen" <dave.hansen@...ux.intel.com>
Subject: Re: [RESEND PATCH v6 07/12] x86/fsgsbase/64: Introduce the
 FIND_PERCPU_BASE macro


> On Mar 25, 2019, at 02:02, Thomas Gleixner <tglx@...utronix.de> wrote:
> 
> On Fri, 15 Mar 2019, Chang S. Bae wrote:
> 
>> diff --git a/arch/x86/include/asm/inst.h b/arch/x86/include/asm/inst.h
>> index f5a796da07f8..d063841a17e3 100644
>> --- a/arch/x86/include/asm/inst.h
>> +++ b/arch/x86/include/asm/inst.h
>> @@ -306,6 +306,21 @@
>> 	.endif
>> 	MODRM 0xc0 movq_r64_xmm_opd1 movq_r64_xmm_opd2
>> 	.endm
>> +
>> +.macro RDPID opd
> 
> So the update to require binutils >= 2.21 does not cover RDPID?
> 

I can see RDPID support in 2.27 release. I wonder if we can even require >= 2.27
right now.

> Thanks,
> 
> 	tglx