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Sat, 13 Jun 2026 01:34:42 -0700 (PDT) Message-ID: Subject: Re: [PATCH v4 6/7] arm64: dts: allwinner: a100: reserve RAM for ATF From: Alexander Sverdlin To: Jernej =?UTF-8?Q?=C5=A0krabec?= , linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen-Yu Tsai , Samuel Holland , Hans de Goede , Dmitry Torokhov , Andre Przywara , Jun Yan , Lukas Schmid , "J." =?ISO-8859-1?Q?Neusch=E4fer?= , Eric Biggers , Michal Simek , Luca Weiss , Sven Peter , Maxime Ripard , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org Date: Sat, 13 Jun 2026 10:34:42 +0200 In-Reply-To: <_6NEZ78hR8a_3V2bhBAGoQ@gmail.com> References: <20260605070923.3045073-1-alexander.sverdlin@gmail.com> <20260605070923.3045073-7-alexander.sverdlin@gmail.com> <_6NEZ78hR8a_3V2bhBAGoQ@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.60.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hi Jernej, On Sat, 2026-06-13 at 10:22 +0200, Jernej =C5=A0krabec wrote: > Dne petek, 5. junij 2026 ob 09:09:20 Srednjeevropski poletni =C4=8Das je = Alexander Sverdlin napisal(a): > > Add reserved-memory node carving out Trusted Firmware-A region spanning > > fixed 256K from physical address 0x40000000. Even though Allwinner ATF > > itself passes the address range in the fdt to U-Boot, U-Boot currently > > only reserves this memory internally, but doesn't carve out the region > > in the fdt passed to Linux. > >=20 > > Signed-off-by: Alexander Sverdlin >=20 > NAK. It is job of boot procedure to properly inject TF-A reserved node. > Any issue should be fixed there. like in commit 0d17c865118881609ea7e381c7cadbb7979cc596 ("arm64: dts: allwinner: Add Allwinner H616 .dtsi file") Signed-off-by: Jernej Skrabec ? ;-) > Best regards, > Jernej Skrabec >=20 > > --- > > Changelog: > > v4: > > - new patch > >=20 > > =C2=A0 arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi | 16 ++++++++++++= ++++ > > =C2=A0 1 file changed, 16 insertions(+) > >=20 > > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi b/arch/arm6= 4/boot/dts/allwinner/sun50i-a100.dtsi > > index 7cb06b19b5a5..d8391663fd1d 100644 > > --- a/arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi > > +++ b/arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi > > @@ -87,6 +87,22 @@ osc32k: osc32k-clk { > > =C2=A0=C2=A0 #clock-cells =3D <0>; > > =C2=A0=C2=A0 }; > > =C2=A0=20 > > + reserved-memory { > > + #address-cells =3D <2>; > > + #size-cells =3D <2>; > > + ranges; > > + > > + /* > > + * 256 KiB reserved for Trusted Firmware-A (BL31). > > + * This is added by BL31 itself, but some bootloaders fail > > + * to propagate this into the DTB handed to kernels. > > + */ > > + secmon@40000000 { > > + reg =3D <0x0 0x40000000 0x0 0x40000>; > > + no-map; > > + }; > > + }; > > + > > =C2=A0=C2=A0 timer { > > =C2=A0=C2=A0 compatible =3D "arm,armv8-timer"; > > =C2=A0=C2=A0 interrupts =3D