linux-kernel - Re: [PATCH v5 03/17] ACPI: bus: Add acpi_riscv

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Message-ID: <ZjNksbTQF1lMQ0k0@sunil-laptop>
Date: Thu, 2 May 2024 15:32:25 +0530
From: Sunil V L <sunilvl@...tanamicro.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org, linux-acpi@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-serial@...r.kernel.org,
	acpica-devel@...ts.linux.dev,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Len Brown <lenb@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Anup Patel <anup@...infault.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Samuel Holland <samuel.holland@...ive.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>,
	Robert Moore <robert.moore@...el.com>,
	Conor Dooley <conor.dooley@...rochip.com>,
	Andrew Jones <ajones@...tanamicro.com>,
	Marc Zyngier <maz@...nel.org>,
	Atish Kumar Patra <atishp@...osinc.com>,
	Andrei Warkentin <andrei.warkentin@...el.com>,
	Haibo1 Xu <haibo1.xu@...el.com>,
	Björn Töpel <bjorn@...nel.org>
Subject: Re: [PATCH v5 03/17] ACPI: bus: Add acpi_riscv_init function

On Thu, May 02, 2024 at 12:24:14PM +0300, Andy Shevchenko wrote:
> On Wed, May 01, 2024 at 05:47:28PM +0530, Sunil V L wrote:
> > Add a new function for RISC-V to do any architecture specific
> > initialization. This function will be used to create platform devices
> > like APLIC, PLIC, RISC-V IOMMU etc. This is similar to acpi_arm_init().
> 
> What is the special about this architecture that it requires a separate
> initialization that is _not_ going to be in other cases?
> Please, elaborate.
> 
This init function will be used to create GSI mapping structures and in
future may be others like iommu. Like I mentioned, ARM already has
similar function acpi_arm_init(). So, it is not new right?

Thanks,
Sunil