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[189.203.100.56]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-820631cf6dasm923117a34.13.2026.09.30.07.18.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Sep 2026 07:18:37 -0700 (PDT) Date: Wed, 30 Sep 2026 08:18:34 -0600 From: Tom Rini To: E Shattow Cc: Marek Vasut , Heinrich Schuchardt , Leo Liang , u-boot@lists.u-boot-project.org Subject: Re: [PATCH] lmb: Add StarFive JH-7110 SoC as requiring DMA below 4G Message-ID: <20260930141834.GF858934@bill-the-cat> References: <20260929230758.616924-1-e@freeshell.de> <8a759e95-866e-460c-9899-d5bb30ff4e04@freeshell.de> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="qjMlfTdtY7c+V1kx" Content-Disposition: inline In-Reply-To: <8a759e95-866e-460c-9899-d5bb30ff4e04@freeshell.de> X-Clacks-Overhead: GNU Terry Pratchett X-BeenThere: u-boot@lists.u-boot-project.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.u-boot-project.org --qjMlfTdtY7c+V1kx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Sep 29, 2026 at 06:51:24PM -0700, E Shattow wrote: > Hi, >=20 > On 9/29/26 17:43, Marek Vasut wrote: > > On 9/30/26 1:07 AM, E Shattow wrote: > >> Platform drivers and hardware for StarFive JH-7110 SoC are not capable= of > >> DMA access above 4GB > >=20 > > 4 GiB >=20 > Yes, I agree. Fixing as I apply. >=20 > >=20 > >> . This was previously a problem for MMC access then > >> resolved by a workaround, since reverted in a3075db94d49 ("lmb: Reinst= ate > >> access to memory above ram_top"). The symptom of this is EFI boot fail= ure > >> of GRUB from EFI System Partition on USB MSC with a starfive_visionfiv= e2 > >> board target that has the on-chip Cadence USB, tested with Pine64 Star= 64. > >> > >> Restore the workaround with a dependency on LMB_LIMIT_DMA_BELOW_RAM_TO= P. > >> > >> Signed-off-by: E Shattow > >=20 > > Reviewed-by: Marek Vasut >=20 > Looks good to me as suggested. >=20 > Thanks, -E >=20 >=20 --=20 Tom --qjMlfTdtY7c+V1kx Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTzzqh0PWDgGS+bTHor4qD1Cr/kCgUCar0aNwAKCRAr4qD1Cr/k CpOqAP9J/7hirZPpGZlIdljWGCgKbEcsUQEQgiaLKN5TayhvswD+Ovwd/dDRwrzP 67DjnmR74cb3RZqwD687W0de5Kn9oQ0= =H/7O -----END PGP SIGNATURE----- --qjMlfTdtY7c+V1kx--