linux-kernel - Re: [PATCH 2/4] ACPI: NUMA: Add handler for SRAT RINTC affinity structure

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Message-ID: <ZeailF+UYf/+4NQq@sunil-laptop>
Date: Tue, 5 Mar 2024 10:11:56 +0530
From: Sunil V L <sunilvl@...tanamicro.com>
To: Haibo Xu <haibo1.xu@...el.com>
Cc: xiaobo55x@...il.com, ajones@...tanamicro.com,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Len Brown <lenb@...nel.org>, Robert Moore <robert.moore@...el.com>,
	Conor Dooley <conor.dooley@...rochip.com>,
	Guo Ren <guoren@...nel.org>, Anup Patel <apatel@...tanamicro.com>,
	Alexandre Ghiti <alexghiti@...osinc.com>,
	Greentime Hu <greentime.hu@...ive.com>, Baoquan He <bhe@...hat.com>,
	Jisheng Zhang <jszhang@...nel.org>,
	Sami Tolvanen <samitolvanen@...gle.com>,
	Clément Léger <cleger@...osinc.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	Chen Jiahao <chenjiahao16@...wei.com>,
	James Morse <james.morse@....com>, Evan Green <evan@...osinc.com>,
	Samuel Holland <samuel.holland@...ive.com>,
	Ard Biesheuvel <ardb@...nel.org>, Tony Luck <tony.luck@...el.com>,
	Yuntao Wang <ytcoode@...il.com>,
	Alison Schofield <alison.schofield@...el.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org, acpica-devel@...ts.linux.dev
Subject: Re: [PATCH 2/4] ACPI: NUMA: Add handler for SRAT RINTC affinity
 structure

Hi Haibo,

On Wed, Jan 31, 2024 at 10:31:59AM +0800, Haibo Xu wrote:
> Add RINTC affinity structure handler during parsing SRAT table.
> The ARCH specific implementation will be added in next patch.
> 
> Signed-off-by: Haibo Xu <haibo1.xu@...el.com>
> ---
>  drivers/acpi/numa/srat.c | 32 +++++++++++++++++++++++++++++++-
>  include/linux/acpi.h     |  3 +++
>  2 files changed, 34 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c
> index 0214518fc582..503abcf6125d 100644
> --- a/drivers/acpi/numa/srat.c
> +++ b/drivers/acpi/numa/srat.c
> @@ -165,6 +165,19 @@ acpi_table_print_srat_entry(struct acpi_subtable_header *header)
>  		}
>  	}
>  	break;
> +
> +	case ACPI_SRAT_TYPE_RINTC_AFFINITY:
> +		{
> +			struct acpi_srat_rintc_affinity *p =
> +			    (struct acpi_srat_rintc_affinity *)header;
> +			pr_debug("SRAT Processor (acpi id[0x%04x]) in proximity domain %d %s\n",
> +				 p->acpi_processor_uid,
> +				 p->proximity_domain,
> +				 (p->flags & ACPI_SRAT_RINTC_ENABLED) ?
> +				 "enabled" : "disabled");
> +		}
> +		break;
> +
>  	default:
>  		pr_warn("Found unsupported SRAT entry (type = 0x%x)\n",
>  			header->type);
> @@ -448,6 +461,21 @@ acpi_parse_gi_affinity(union acpi_subtable_headers *header,
>  }
>  #endif /* defined(CONFIG_X86) || defined (CONFIG_ARM64) */
>  
> +static int __init
> +acpi_parse_rintc_affinity(union acpi_subtable_headers *header,
> +			 const unsigned long end)
Alignment doesn't look right. Could you please run checkpatch on all
the patches?

> +{
> +	struct acpi_srat_rintc_affinity *rintc_affinity;
> +
> +	rintc_affinity = (struct acpi_srat_rintc_affinity *)header;
> +	acpi_table_print_srat_entry(&header->common);
> +
> +	/* let architecture-dependent part to do it */
> +	acpi_numa_rintc_affinity_init(rintc_affinity);
> +
Is it required to have this commit first prior to architecture
functionality? I am wondering whether it is logically better to
implement the function first and then consume in next commit?

> +	return 0;
> +}
> +
>  static int __initdata parsed_numa_memblks;
>  
>  static int __init
> @@ -501,7 +529,7 @@ int __init acpi_numa_init(void)
>  
>  	/* SRAT: System Resource Affinity Table */
>  	if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
> -		struct acpi_subtable_proc srat_proc[4];
> +		struct acpi_subtable_proc srat_proc[5];
>  
>  		memset(srat_proc, 0, sizeof(srat_proc));
>  		srat_proc[0].id = ACPI_SRAT_TYPE_CPU_AFFINITY;
> @@ -512,6 +540,8 @@ int __init acpi_numa_init(void)
>  		srat_proc[2].handler = acpi_parse_gicc_affinity;
>  		srat_proc[3].id = ACPI_SRAT_TYPE_GENERIC_AFFINITY;
>  		srat_proc[3].handler = acpi_parse_gi_affinity;
> +		srat_proc[4].id = ACPI_SRAT_TYPE_RINTC_AFFINITY;
> +		srat_proc[4].handler = acpi_parse_rintc_affinity;
>  
>  		acpi_table_parse_entries_array(ACPI_SIG_SRAT,
>  					sizeof(struct acpi_table_srat),
> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> index b7165e52b3c6..a65273db55c6 100644
> --- a/include/linux/acpi.h
> +++ b/include/linux/acpi.h
> @@ -269,6 +269,9 @@ acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa) { }
>  
>  int acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma);
>  
> +static inline void
> +acpi_numa_rintc_affinity_init(struct acpi_srat_rintc_affinity *pa) { }
> +
I think this can be fit in single like as we can have upto 100
characters.

>  #ifndef PHYS_CPUID_INVALID
>  typedef u32 phys_cpuid_t;
>  #define PHYS_CPUID_INVALID (phys_cpuid_t)(-1)
> -- 
> 2.34.1
>