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Sat, 13 Jun 2026 02:38:19 -0700 (PDT) From: Jernej =?UTF-8?B?xaBrcmFiZWM=?= To: linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, Alexander Sverdlin Cc: 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 11:38:17 +0200 Message-ID: In-Reply-To: References: <20260605070923.3045073-1-alexander.sverdlin@gmail.com> <_6NEZ78hR8a_3V2bhBAGoQ@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Dne sobota, 13. junij 2026 ob 10:34:42 Srednjeevropski poletni =C4=8Das je = Alexander Sverdlin napisal(a): > Hi Jernej, >=20 > 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 j= e Alexander Sverdlin napisal(a): > > > Add reserved-memory node carving out Trusted Firmware-A region spanni= ng > > > 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. >=20 >=20 > like in commit 0d17c865118881609ea7e381c7cadbb7979cc596 > ("arm64: dts: allwinner: Add Allwinner H616 .dtsi file") > Signed-off-by: Jernej Skrabec >=20 > ? ;-) I was against that too. It's time to be fixed in bootloader. Best regards, Jernej >=20 > > Best regards, > > Jernej Skrabec > >=20 > > > --- > > > 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/ar= m64/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 >=20