linux-kernel - Re: [PATCH v8 04/13] arch/resctrl: Bring all the macros to resctrl.h

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Message-ID: <20181120093553.GB2527@zn.tnic>
Date:   Tue, 20 Nov 2018 10:35:53 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     "Moger, Babu" <Babu.Moger@....com>
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Subject: Re: [PATCH v8 04/13] arch/resctrl: Bring all the macros to resctrl.h

On Fri, Nov 16, 2018 at 08:54:28PM +0000, Moger, Babu wrote:
> diff --git a/arch/x86/kernel/cpu/resctrl_monitor.c b/arch/x86/kernel/cpu/resctrl_monitor.c
> index 6d654f7b0eba..9fd62263dabd 100644
> --- a/arch/x86/kernel/cpu/resctrl_monitor.c
> +++ b/arch/x86/kernel/cpu/resctrl_monitor.c
> @@ -28,9 +28,6 @@
>  #include <asm/cpu_device_id.h>
>  #include "resctrl.h"
>  
> -#define MSR_IA32_QM_CTR		0x0c8e
> -#define MSR_IA32_QM_EVTSEL		0x0c8d
> -
>  struct rmid_entry {
>  	u32				rmid;
>  	int				busy;
> @@ -97,8 +94,8 @@ static u64 __rmid_read(u32 rmid, u32 eventid)
>  	 * IA32_QM_CTR.Error (bit 63) and IA32_QM_CTR.Unavailable (bit 62)
>  	 * are error bits.
>  	 */
> -	wrmsr(MSR_IA32_QM_EVTSEL, eventid, rmid);
> -	rdmsrl(MSR_IA32_QM_CTR, val);
> +	wrmsr(IA32_QM_EVTSEL, eventid, rmid);
> +	rdmsrl(IA32_QM_CTR, val);

Well, if you have a look at arch/x86/include/asm/msr-index.h, you'll see
that all MSR defines are prefixed with "MSR_" so dropping that prefix
here loses information and staring at the define doesn't tell me what it
is.

-- 
Regards/Gruss,
    Boris.

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