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Fri, 25 Oct 2024 16:47:58 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Fri, 25 Oct 2024 21:47:18 +0100 From: "Jiaxun Yang" To: "Gregory CLEMENT" , "Aleksandar Rikalo" , "Thomas Bogendoerfer" , "Thomas Gleixner" Cc: "linux-mips@vger.kernel.org" , linux-kernel@vger.kernel.org, "Vladimir Kondratiev" , =?UTF-8?Q?Th=C3=A9o_Lebrun?= , "Tawfik Bayouk" , "Thomas Petazzoni" Message-Id: <4acb9693-ba68-4f09-a4da-677c8b1e583b@app.fastmail.com> In-Reply-To: <87jzdvc3wo.fsf@BLaptop.bootlin.com> References: <20241025-no-cpu-cluster-support-v1-1-5e81fcf9f25c@bootlin.com> <70b28614-e40e-4022-818b-80711c05c7a4@app.fastmail.com> <87jzdvc3wo.fsf@BLaptop.bootlin.com> Subject: Re: [PATCH] irqchip: mips-gic: Handle case with cluster without CPU cores Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable =E5=9C=A82024=E5=B9=B410=E6=9C=8825=E6=97=A5=E5=8D=81=E6=9C=88 =E4=B8=8B= =E5=8D=889:40=EF=BC=8CGregory CLEMENT=E5=86=99=E9=81=93=EF=BC=9A > Hi Jiaxun, > [...] >> Is second cluster IOCU only? > > Yes indeed in EyeQ5, the second cluster is the place for many > accelerator for vision that benefit of the L2 cache and of the coheren= cy > unit. It makes sense to me then, that for the information. I just checked IOCU only MPS release and indeed those special handling are necessary. Reviewd-by: Jiaxun Yang I think some initialisation to IOCU and L2C in second cluster is also necessary, but I guess those are already done by firmware in your case? Thanks --=20 - Jiaxun