linux-kernel - Re: [PATCH v2] cxl/core: Fix the UUID of CXL vendor debug Log identifier

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Message-ID: <2ce919d1-9c2d-44be-a58f-56b91eac7b48@intel.com>
Date: Tue, 9 Jul 2024 08:48:22 -0700
From: Dave Jiang <dave.jiang@...el.com>
To: peng guo <engguopeng@...a.edu.cn>, dave@...olabs.net,
 jonathan.cameron@...wei.com, alison.schofield@...el.com,
 vishal.l.verma@...el.com, ira.weiny@...el.com, dan.j.williams@...el.com
Cc: linux-cxl@...r.kernel.org, linux-kernel@...r.kernel.org, wyguopeng@....com
Subject: Re: [PATCH v2] cxl/core: Fix the UUID of CXL vendor debug Log
 identifier



On 7/9/24 7:12 AM, peng guo wrote:
> Fix the definition value of DEFINE_CXL_VENDOR_DEBUG_UUID to match the
> CXL r3.1 specification, although this value is not currently used.
> 
> All CXL devices that support a debug log shall support the Vendor Debug
> Log to allow the log to be accessed through a common host driver, for any
> device, all versions of the CXL specification define the same value with
> Log Identifier of: 5e1819d9-11a9-400c-811f-d60719403d86
> 
> refer to:
> CXL spec r2.0 Table 169
> CXL spec r3.0 Table 8-62
> CXL spec r3.1 Table 8-71
> 
> Fixes: 49be6dd80751 ("cxl/mbox: Move command definitions to common location")

Thanks for the update Peng. 

This one is tricky as the definition has been moved twice, but the original commit that introduced the error was here:
472b1ce6e9d6 ("cxl/mem: Enable commands via CEL")

I will update that when I apply the patch.

Next time for follow on patch revisions, please post as independent email rather than threaded behind the previous submission. Thanks! 

> Signed-off-by: peng guo <engguopeng@...a.edu.cn>
> ---
>  v1 -> v2: update commit message  and addressed review comments
> 
>  drivers/cxl/cxlmem.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
> index af8169ccdbc0..feb1106559d2 100644
> --- a/drivers/cxl/cxlmem.h
> +++ b/drivers/cxl/cxlmem.h
> @@ -563,7 +563,7 @@ enum cxl_opcode {
>  		  0x3b, 0x3f, 0x17)
>  
>  #define DEFINE_CXL_VENDOR_DEBUG_UUID                                           \
> -	UUID_INIT(0xe1819d9, 0x11a9, 0x400c, 0x81, 0x1f, 0xd6, 0x07, 0x19,     \
> +	UUID_INIT(0x5e1819d9, 0x11a9, 0x400c, 0x81, 0x1f, 0xd6, 0x07, 0x19,     \
>  		  0x40, 0x3d, 0x86)
>  
>  struct cxl_mbox_get_supported_logs {