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Fri, 1 Dec 2023 05:49:55 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.9.0-alpha0-1178-geeaf0069a7-fm-20231114.001-geeaf0069 MIME-Version: 1.0 Message-Id: <7cdf280c-c3b4-4996-9854-d24c4842ff4d@app.fastmail.com> In-Reply-To: <87ttp2dxe1.fsf@BL-laptop> References: <20231123152639.561231-1-gregory.clement@bootlin.com> <20231123152639.561231-21-gregory.clement@bootlin.com> <87ttp2dxe1.fsf@BL-laptop> Date: Fri, 01 Dec 2023 10:49:19 +0000 From: "Jiaxun Yang" To: "Gregory CLEMENT" , "paulburton@kernel.org" , "Thomas Bogendoerfer" , "linux-mips@vger.kernel.org" , "Rob Herring" , "Krzysztof Kozlowski" , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: "Vladimir Kondratiev" , "Tawfik Bayouk" , "Alexandre Belloni" , =?UTF-8?Q?Th=C3=A9o_Lebrun?= , "Thomas Petazzoni" Subject: Re: [PATCH v2 20/21] MIPS: generic: Add support for Mobileye EyeQ5 Content-Type: text/plain;charset=utf-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org =E5=9C=A82023=E5=B9=B412=E6=9C=881=E6=97=A5=E5=8D=81=E4=BA=8C=E6=9C=88 =E4= =B8=8A=E5=8D=8810:34=EF=BC=8CGregory CLEMENT=E5=86=99=E9=81=93=EF=BC=9A > "Jiaxun Yang" writes: > >> =E5=9C=A82023=E5=B9=B411=E6=9C=8823=E6=97=A5=E5=8D=81=E4=B8=80=E6=9C=88= =E4=B8=8B=E5=8D=883:26=EF=BC=8CGregory CLEMENT=E5=86=99=E9=81=93=EF=BC=9A >>> Introduce support for the MIPS based Mobileye EyeQ5 SoCs. >>> >>> Signed-off-by: Gregory CLEMENT >>> --- >> [...] >>> diff --git a/arch/mips/generic/Kconfig b/arch/mips/generic/Kconfig >>> index 7dc5b3821cc6e..04e1fc6f789b5 100644 >>> --- a/arch/mips/generic/Kconfig >>> +++ b/arch/mips/generic/Kconfig >>> @@ -48,6 +48,13 @@ config SOC_VCOREIII >>> config MSCC_OCELOT >>> bool >>>=20 >>> +config SOC_EYEQ5 >>> + select ARM_AMBA >>> + select WEAK_ORDERING >>> + select WEAK_REORDERING_BEYOND_LLSC >>> + select PHYSICAL_START_BOOL >>> + bool >> >> ^ I believe WEAK_ORDERING is already selected by MIPS_CPS, > > But MIPS_CPS can be disabled: it is not selected by > MIPS_GENERIC_KERNEL. IMO if MIPS_CPS is not select then there is no SMP support on this platf= orm. WEAK_ORDERING only make sense for SMP system. > >> and WEAK_REORDERING_BEYOND_LLSC should be selected by MIPS_CPS as wel= l. > > WEAK_REORDERING_BEYOND_LLSC is only selected by CPU_LOONGSON64 for > now not by MIPS_CPS I believe this applies to all SMP cores from MTI, I'll check with hardwa= re folks. Thanks - Jiaxun > > Thanks, > > Gregory >> =20 >> Thanks >> --=20 >> - Jiaxun > > --=20 > Gregory Clement, Bootlin > Embedded Linux and Kernel engineering > http://bootlin.com --=20 - Jiaxun