linux-kernel - Re: [PATCH v3 02/19] x86/resctrl: Access per-rmid structures by index

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Date:   Mon, 24 Apr 2023 15:06:45 +0200
From:   Peter Newman <peternewman@...gle.com>
To:     James Morse <james.morse@....com>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Fenghua Yu <fenghua.yu@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        H Peter Anvin <hpa@...or.com>,
        Babu Moger <Babu.Moger@....com>,
        shameerali.kolothum.thodi@...wei.com,
        D Scott Phillips OS <scott@...amperecomputing.com>,
        carl@...amperecomputing.com, lcherian@...vell.com,
        bobo.shaobowang@...wei.com, tan.shaopeng@...itsu.com,
        xingxin.hx@...nanolis.org, baolin.wang@...ux.alibaba.com,
        Jamie Iles <quic_jiles@...cinc.com>,
        Xin Hao <xhao@...ux.alibaba.com>
Subject: Re: [PATCH v3 02/19] x86/resctrl: Access per-rmid structures by index

Hi James,

On Mon, Mar 20, 2023 at 6:27 PM James Morse <james.morse@....com> wrote:
> diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
> index 030d3b409768..351319403f84 100644
> --- a/arch/x86/kernel/cpu/resctrl/core.c
> +++ b/arch/x86/kernel/cpu/resctrl/core.c
> @@ -600,7 +600,7 @@ static void clear_closid_rmid(int cpu)
>         state->default_rmid = 0;
>         state->cur_closid = 0;
>         state->cur_rmid = 0;
> -       wrmsr(MSR_IA32_PQR_ASSOC, 0, 0);
> +       wrmsr(MSR_IA32_PQR_ASSOC, RESCTRL_RESERVED_CLOSID, 0);

It looks like the RMID/CLOSID params are in the wrong order in this wrmsr().

-Peter