RISC-V: Fix Maximum Physical Memory 2GiB option for 64bit systems
authorAnup Patel <Anup.Patel@wdc.com>
Fri, 5 Apr 2019 05:49:34 +0000 (05:49 +0000)
committerPalmer Dabbelt <palmer@sifive.com>
Wed, 10 Apr 2019 16:41:40 +0000 (09:41 -0700)
commitf05badde4e20d2e0f8c39d07a6873b2bfb0754f8
treebf43cde7dbc80911ccd86c3a87170ba1d2a68ee2
parent6ec4bae178d8a1e9814eb3bfdd321b0475de0468
RISC-V: Fix Maximum Physical Memory 2GiB option for 64bit systems

The Maximum Physical Memory 2GiB option for 64bit systems is currently
broken because kernel hangs at boot-time when this option is enabled
and the underlying system has more than 2GiB memory.

This issue can be easily reproduced on SiFive Unleashed board where
we have 8GiB of memory.

This patch fixes above issue by removing unusable memory region in
setup_bootmem().

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
arch/riscv/mm/init.c