Message-ID: <aedc760b-ca4d-031d-6797-4f0a1ab2d5d7@intel.com>
Date:   Wed, 1 Feb 2023 11:35:48 -0800
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Subject: Re: [PATCH 4/5] platform/x86/intel/ifs: Implement Array BIST test
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To:     Jithu Joseph <jithu.joseph@intel.com>, hdegoede@redhat.com,
        markgross@kernel.org
Cc:     tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
        dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
        gregkh@linuxfoundation.org, rostedt@goodmis.org,
        ashok.raj@intel.com, tony.luck@intel.com,
        linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org,
        patches@lists.linux.dev, ravi.v.shankar@intel.com,
        thiago.macieira@intel.com, athenas.jimenez.gonzalez@intel.com,
        sohil.mehta@intel.com
References: <20230131234302.3997223-1-jithu.joseph@intel.com>
 <20230131234302.3997223-5-jithu.joseph@intel.com>
From:   Dave Hansen <dave.hansen@intel.com>
In-Reply-To: <20230131234302.3997223-5-jithu.joseph@intel.com>
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Precedence: bulk

On 1/31/23 15:43, Jithu Joseph wrote:
> +union ifs_array {
> +	u64	data;
> +	struct {
> +		u32	array_bitmask		:32;
> +		u32	array_bank		:16;
> +		u32	rsvd			:15;
> +		u32	ctrl_result		:1;
> +	};
> +};

Why bother with a bitfield?  Just do:

union ifs_array {
	u64	data;
	struct {
		u32	array_bitmask;
		u16	array_bank;
		u16	flags;
	};
};

Then you only need to mask 'ctrl_result' out of flags.  You don't need
any crazy macros.