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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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387181dcdb
The Linux RISC-V 32bit kernel is broken after we moved setup_vm() from
kernel/setup.c to mm/init.c because Linux RISC-V 32bit kernel by default
uses cmodel=medlow which results in a non-position-independent setup_vm().
This patch fixes Linux RISC-V 32bit kernel booting by:
1. Forcing cmodel=medany for mm/init.c
2. Moving remaing MM-related stuff va_pa_offset, pfn_base and
empty_zero_page from kernel/setup.c to mm/init.c
Further, the setup_vm() cannot handle GCC instrumentation for FTRACE so
we disable it for mm/init.c by not using "-pg" compiler flag.
Fixes: 6f1e9e946f ("RISC-V: Move setup_vm() to mm/init.c")
Suggested-by: Christoph Hellwig <hch@lst.de>
Suggested-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
12 lines
181 B
Makefile
12 lines
181 B
Makefile
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CFLAGS_init.o := -mcmodel=medany
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ifdef CONFIG_FTRACE
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CFLAGS_REMOVE_init.o = -pg
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endif
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obj-y += init.o
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obj-y += fault.o
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obj-y += extable.o
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obj-y += ioremap.o
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obj-y += cacheflush.o
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