From: Tom Rini <trini@konsulko.com>
To: Mark Kettenis <mark.kettenis@xs4all.nl>
Cc: Janne Grunau <j@jannau.net>, u-boot@lists.denx.de
Subject: Re: [PATCH] apple_m1_defconfig: Bump CONFIG_LMB_MAX_REGIONS to 64
Date: Fri, 17 Mar 2023 12:43:16 -0400 [thread overview]
Message-ID: <20230317164316.GZ54321@bill-the-cat> (raw)
In-Reply-To: <87v8j4bu4b.fsf@bloch.sibelius.xs4all.nl>
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On Mon, Mar 13, 2023 at 03:31:32PM +0100, Mark Kettenis wrote:
> > From: Janne Grunau <j@jannau.net>
> > Date: Mon, 13 Mar 2023 14:54:32 +0100
> >
> > Apple silicon SoCs have numerous embedded co-processors with pre-loaded
> > firmware. The co-processors text and data sections need to be mapped via
> > DART iommus controlled by the main processor. Those sections are
> > exported as reserved-memory. Bump CONFIG_LMB_MAX_REGIONS from 8 to 64 to
> > deal with the large amount of reserved-memory regions.
>
> We recently bumped the default for CONFIG_LMB_MAX_REGIONS from 8 to
> 16, but 64 would be a safer value for this platform as there are more
> co-processor drivers in the pipeline that may add reserved-memory
> regions. These machines have plenty of memory.
>
> > Signed-off-by: Janne Grunau <j@jannau.net>
>
> Reviewed-by: Mark Kettenis <kettenis@openbsd.org>
Does this mean it's a fix we need for v2023.04, or v2023.07 is OK?
--
Tom
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next prev parent reply other threads:[~2023-03-17 16:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-13 13:54 [PATCH] apple_m1_defconfig: Bump CONFIG_LMB_MAX_REGIONS to 64 Janne Grunau
2023-03-13 14:31 ` Mark Kettenis
2023-03-17 16:43 ` Tom Rini [this message]
2023-03-17 18:16 ` Mark Kettenis
2023-03-30 1:54 ` Tom Rini
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