Received-SPF: pass (google.com: domain of linux-kernel+bounces-188063-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) client-ip=147.75.199.223;
Date: Thu, 23 May 2024 16:59:03 -0500
From: Bjorn Helgaas <helgaas@kernel.org>
To: Sunil V L <sunilvl@ventanamicro.com>
Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
	linux-riscv@lists.infradead.org, linux-acpi@vger.kernel.org,
	linux-pci@vger.kernel.org, linux-serial@vger.kernel.org,
	acpica-devel@lists.linux.dev,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	Len Brown <lenb@kernel.org>, Bjorn Helgaas <bhelgaas@google.com>,
	Anup Patel <anup@brainfault.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Samuel Holland <samuel.holland@sifive.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jiri Slaby <jirislaby@kernel.org>,
	Robert Moore <robert.moore@intel.com>,
	Conor Dooley <conor.dooley@microchip.com>,
	Andrew Jones <ajones@ventanamicro.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Marc Zyngier <maz@kernel.org>,
	Atish Kumar Patra <atishp@rivosinc.com>,
	Andrei Warkentin <andrei.warkentin@intel.com>,
	Haibo1 Xu <haibo1.xu@intel.com>,
	=?utf-8?B?QmrDtnJuIFTDtnBlbA==?= <bjorn@kernel.org>
Subject: Re: [PATCH v5 07/17] ACPI: bus: Add RINTC IRQ model for RISC-V
Message-ID: <20240523215903.GA138985@bhelgaas>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20240501121742.1215792-8-sunilvl@ventanamicro.com>

On Wed, May 01, 2024 at 05:47:32PM +0530, Sunil V L wrote:
> Add the IRQ model for RISC-V INTC so that acpi_set_irq_model can use this
> for RISC-V.
> 
> Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
> ---
>  drivers/acpi/bus.c   | 3 +++
>  include/linux/acpi.h | 1 +
>  2 files changed, 4 insertions(+)
> 
> diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
> index 17ee483c3bf4..6739db258a95 100644
> --- a/drivers/acpi/bus.c
> +++ b/drivers/acpi/bus.c
> @@ -1190,6 +1190,9 @@ static int __init acpi_bus_init_irq(void)
>  	case ACPI_IRQ_MODEL_LPIC:
>  		message = "LPIC";
>  		break;
> +	case ACPI_IRQ_MODEL_RINTC:
> +		message = "RINTC";
> +		break;
>  	default:
>  		pr_info("Unknown interrupt routing model\n");
>  		return -ENODEV;
> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> index 846a4001b5e0..c1a01fd02873 100644
> --- a/include/linux/acpi.h
> +++ b/include/linux/acpi.h
> @@ -107,6 +107,7 @@ enum acpi_irq_model_id {
>  	ACPI_IRQ_MODEL_PLATFORM,
>  	ACPI_IRQ_MODEL_GIC,
>  	ACPI_IRQ_MODEL_LPIC,
> +	ACPI_IRQ_MODEL_RINTC,

Is the ACPI_IRQ_MODEL_RINTC value documented somewhere?  Maybe an ECR
for the ACPI spec?

acpi_bus_init_irq() is going to pass ACPI_IRQ_MODEL_RINTC to _PIC, and
ACPI r6.5, sec 5.8.1 only mentions the ACPI_IRQ_MODEL_PIC,
ACPI_IRQ_MODEL_IOAPIC, and ACPI_IRQ_MODEL_IOSAPIC values.

Even the existing ACPI_IRQ_MODEL_PLATFORM, ACPI_IRQ_MODEL_GIC, and
ACPI_IRQ_MODEL_LPIC values aren't mentioned in ACPI r6.5.

>  	ACPI_IRQ_MODEL_COUNT
>  };
>  
> -- 
> 2.40.1
>