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Sat, 13 Jun 2026 05:23:46 -0700 (PDT) Message-ID: <039295d3542deda8c56151252fe5e50c88c13deb.camel@gmail.com> 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 14:23:46 +0200 In-Reply-To: References: <20260605070923.3045073-1-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 11:38 +0200, Jernej =C5=A0krabec wrote: > > > > Add reserved-memory node carving out Trusted Firmware-A region span= ning > > > > fixed 256K from physical address 0x40000000. Even though Allwinner = ATF > > > > itself passes the address range in the fdt to U-Boot, U-Boot curren= tly > > > > only reserves this memory internally, but doesn't carve out the reg= ion > > > > 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 nod= e. > > > Any issue should be fixed there. > >=20 > >=20 > > like in commit 0d17c865118881609ea7e381c7cadbb7979cc596 > > ("arm64: dts: allwinner: Add Allwinner H616 .dtsi file") > > =C2=A0=C2=A0=C2=A0=C2=A0 Signed-off-by: Jernej Skrabec > >=20 > > ? ;-) >=20 > I was against that too. >=20 > It's time to be fixed in bootloader. I agree, I was wondering about this shortcut as well... I'll implement some sort of generic reserved memory handling in U-Boot. --=20 Alexander Sverdlin.