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Subject: Re: [PATCH v3 2/5] x86/enter: Create macros to set/clear IBRS
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Greg KH <gregkh@linuxfoundation.org>,
        Dave Hansen <dave.hansen@intel.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Andi Kleen <ak@linux.intel.com>,
        Arjan Van De Ven <arjan.van.de.ven@intel.com>,
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        Peter Zijlstra <peterz@infradead.org>,
        Dan Williams <dan.j.williams@intel.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Ashok Raj <ashok.raj@intel.com>, linux-kernel@vger.kernel.org
References: <cover.1515542293.git.tim.c.chen@linux.intel.com>
 <3aab341725ee6a9aafd3141387453b45d788d61a.1515542293.git.tim.c.chen@linux.intel.com>
 <alpine.DEB.2.20.1801111639290.2091@nanos>
From: Tim Chen <tim.c.chen@linux.intel.com>
Message-ID: <90242f1d-216d-2213-4bb2-5450f4cb07be@linux.intel.com>
Date: Thu, 11 Jan 2018 13:05:32 -0800
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On 01/11/2018 08:04 AM, Thomas Gleixner wrote:
> On Tue, 9 Jan 2018, Tim Chen wrote:
>> +
>> +.macro WRMSR_ASM msr_nr:req edx_val:req eax_val:req
>> +	movl	\msr_nr, %ecx
>> +	movl	\edx_val, %edx
>> +	movl	\eax_val, %eax
>> +.endm
> 
> This is the most brilliant piece of useless code I've seen in a long time.
> 
> 
> 	 tglx
> 

Sorry that was a major brain fart on my part. 

Tim