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bh=o9OZ4u4cVhWMS+y1LRMtoJYOo8sApnqooCJL/ZNuRAo=; b=FDrVHXBTcltC4Iufktx2VI/LiOCR2aN+YJi+meo2hqbGAFhFds/fqsuL8s70u0ByrB+hMF pydDyOXNF36CkKdnr/dymUphQ+pNMX50s8rhySooXkafbpoE3ry7YlLH5N7DEdx7tCPneX IeknfI+dzrXwZQy/fGHZjXniwlj7SnDgJSPdR2Z7q5L8gl8rvV7RFkYVHQQzGzIV2lQnzw U7805F1o/bl1/wnuNIBDymEPO4N9/IlnwF9a5aAEohiJGQ1b0MLN4X/oScMHCQ5fQhozDP rN94bxfAZPy0e7sv/yt6S4SbEha22PutMnZ7lFjPJJCdoRdBRBDl+TKwHRXCYA== Date: Wed, 25 Mar 2026 14:52:45 +0100 MIME-Version: 1.0 Subject: Re: [PATCH] arm64: dts: renesas: sparrow-hawk: Reserve first 128 MiB of DRAM To: Geert Uytterhoeven , Marek Vasut Cc: linux-arm-kernel@lists.infradead.org, stable@vger.kernel.org, Conor Dooley , Geert Uytterhoeven , Krzysztof Kozlowski , Magnus Damm , Rob Herring , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org References: <20260324143342.17872-1-marek.vasut+renesas@mailbox.org> Content-Language: en-US From: Marek Vasut In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-MBO-RS-ID: 8bf10851b491f6f89bc X-MBO-RS-META: j75d8ic77jhjuhdeawngtk8aegjzebjn X-Rspamd-Queue-Id: 4fgpJL2kK1z9tyY X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260325_065253_634021_2AB733DA X-CRM114-Status: GOOD ( 14.03 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 3/25/26 2:08 PM, Geert Uytterhoeven wrote: Hello Geert, >> --- a/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts >> +++ b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts >> @@ -118,6 +118,17 @@ memory@600000000 { >> reg = <0x6 0x00000000 0x1 0x00000000>; >> }; >> >> + reserved-memory { >> + #address-cells = <2>; >> + #size-cells = <2>; >> + ranges; >> + >> + tfa@40000000 { >> + reg = <0x0 0x40000000 0x0 0x8000000>; >> + no-map; >> + }; >> + }; > > Obviously I don't like this very much, but I agree there is not much > else we can do at this point. Shall I add a > > /* Temporary workaround for broken TFA BL31 */ > > comment while applying? For maximum backward compatibility even with old TFA BL31 versions, which the users may run for whatever reason, I believe this reserved memory area is here to stay and won't be "Temporary". But I will be looking into TFA to fill in this reserved-memory node properly for this and future SoCs. > Reviewed-by: Geert Uytterhoeven > i.e. will queue in renesas-fixes for v7.0. Thank you