linux-kernel - Re: [PATCH v2 2/4] tools/testing/cxl: Fix command effects for inject/clear poison

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Message-ID: <ZIDYHzw3sVTiOjeX@aschofie-mobl2>
Date:   Wed, 7 Jun 2023 12:18:55 -0700
From:   Alison Schofield <alison.schofield@...el.com>
To:     Vishal Verma <vishal.l.verma@...el.com>
Cc:     Ira Weiny <ira.weiny@...el.com>, Dave Jiang <dave.jiang@...el.com>,
        Ben Widawsky <bwidawsk@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-cxl@...r.kernel.org, linux-kernel@...r.kernel.org,
        Davidlohr Bueso <dave@...olabs.net>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Russ Weight <russell.h.weight@...el.com>
Subject: Re: [PATCH v2 2/4] tools/testing/cxl: Fix command effects for
 inject/clear poison

On Mon, Jun 05, 2023 at 02:20:23PM -0600, Vishal Verma wrote:
> The CXL spec (3.0, section 8.2.9.8.4) Lists Inject Poison and Clear
> Poison as having the effects of "Immediate Data Change". Fix this in the
> mock driver so that the command effect log is populated correctly.
> 
> Fixes: 371c16101ee8 ("tools/testing/cxl: Mock the Inject Poison mailbox command")
> Cc: Alison Schofield <alison.schofield@...el.com>
> Cc: Dan Williams <dan.j.williams@...el.com>
> Signed-off-by: Vishal Verma <vishal.l.verma@...el.com>

Hi Vishal,
I took a look at this, wondering if we should promote it as a 6.4 fix.
I came up with a no. It has no user impact of inject/clear usage in the
mock driver environment.

Thanks for fixing!
Reviewed-by: Alison Schofield <alison.schofield@...el.com>


> ---
>  tools/testing/cxl/test/mem.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
> index 34b48027b3de..403cd3608772 100644
> --- a/tools/testing/cxl/test/mem.c
> +++ b/tools/testing/cxl/test/mem.c
> @@ -52,11 +52,11 @@ static struct cxl_cel_entry mock_cel[] = {
>  	},
>  	{
>  		.opcode = cpu_to_le16(CXL_MBOX_OP_INJECT_POISON),
> -		.effect = cpu_to_le16(0),
> +		.effect = cpu_to_le16(EFFECT(2)),
>  	},
>  	{
>  		.opcode = cpu_to_le16(CXL_MBOX_OP_CLEAR_POISON),
> -		.effect = cpu_to_le16(0),
> +		.effect = cpu_to_le16(EFFECT(2)),
>  	},
>  };
>  
> 
> -- 
> 2.40.1
>