From: Marek Vasut <marek.vasut@mailbox.org>
To: E Shattow <e@freeshell.de>, Tom Rini <trini@konsulko.com>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>,
Leo Liang <leo.liang@sifive.com>,
u-boot@lists.u-boot-project.org
Subject: Re: [PATCH] lmb: Add StarFive JH-7110 SoC as requiring DMA below 4G
Date: Wed, 30 Sep 2026 02:43:17 +0200 [thread overview]
Message-ID: <bdec8558-0408-4efc-8a50-e726c8be9cee@mailbox.org> (raw)
In-Reply-To: <20260929230758.616924-1-e@freeshell.de>
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
4 GiB
>. This was previously a problem for MMC access then
> resolved by a workaround, since reverted in a3075db94d49 ("lmb: Reinstate
> access to memory above ram_top"). The symptom of this is EFI boot failure
> of GRUB from EFI System Partition on USB MSC with a starfive_visionfive2
> board target that has the on-chip Cadence USB, tested with Pine64 Star64.
>
> Restore the workaround with a dependency on LMB_LIMIT_DMA_BELOW_RAM_TOP.
>
> Signed-off-by: E Shattow <e@freeshell.de>
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
next prev parent reply other threads:[~2026-09-30 0:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-29 23:07 [PATCH] lmb: Add StarFive JH-7110 SoC as requiring DMA below 4G E Shattow
2026-09-30 0:43 ` Marek Vasut [this message]
2026-09-30 1:51 ` E Shattow
2026-09-30 14:18 ` Tom Rini
2026-09-30 17:17 ` Tom Rini
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