> From: Janne Grunau <[email protected]> > 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 <[email protected]> Reviewed-by: Mark Kettenis <[email protected]> > --- > configs/apple_m1_defconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/configs/apple_m1_defconfig b/configs/apple_m1_defconfig > index b4ecf73cbc78..755560971e57 100644 > --- a/configs/apple_m1_defconfig > +++ b/configs/apple_m1_defconfig > @@ -21,3 +21,4 @@ CONFIG_SYS_WHITE_ON_BLACK=y > CONFIG_NO_FB_CLEAR=y > CONFIG_VIDEO_SIMPLE=y > # CONFIG_GENERATE_SMBIOS_TABLE is not set > +CONFIG_LMB_MAX_REGIONS=64 > > --- > base-commit: 6c1cdf158c4f3ccc8c5f9552f049a3386899dcd2 > change-id: 20230313-apple_m1_defconfig_lmb_max_regions-a18f5612d3c3 > > Best regards, > -- > Janne Grunau <[email protected]> > >
