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Sat, 13 Jun 2026 01:22:30 -0700 (PDT) From: Jernej =?UTF-8?B?xaBrcmFiZWM=?= To: linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, Alexander Sverdlin Cc: Alexander Sverdlin , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen-Yu Tsai , Samuel Holland , Hans de Goede , Dmitry Torokhov , Andre Przywara , Jun Yan , Lukas Schmid , =?UTF-8?B?Si4gTmV1c2Now6RmZXI=?= , Eric Biggers , Michal Simek , Luca Weiss , Sven Peter , Maxime Ripard , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org Subject: Re: [PATCH v4 6/7] arm64: dts: allwinner: a100: reserve RAM for ATF Date: Sat, 13 Jun 2026 10:22:29 +0200 Message-ID: <_6NEZ78hR8a_3V2bhBAGoQ@gmail.com> In-Reply-To: <20260605070923.3045073-7-alexander.sverdlin@gmail.com> References: <20260605070923.3045073-1-alexander.sverdlin@gmail.com> <20260605070923.3045073-7-alexander.sverdlin@gmail.com> Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Dne petek, 5. junij 2026 ob 09:09:20 Srednjeevropski poletni =C4=8Das je Al= exander 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 NAK. It is job of boot procedure to properly inject TF-A reserved node. Any issue should be fixed there. Best regards, Jernej Skrabec > --- > Changelog: > v4: > - new patch >=20 > arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi | 16 ++++++++++++++++ > 1 file changed, 16 insertions(+) >=20 > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi b/arch/arm64/= 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 { > #clock-cells =3D <0>; > }; > =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; > + }; > + }; > + > timer { > compatible =3D "arm,armv8-timer"; > interrupts =3D =20