Vincent Chen 0cff8bff7a riscv: avoid the PIC offset of static percpu data in module beyond 2G limits ... The compiler uses the PIC-relative method to access static variables instead of GOT when the code model is PIC. Therefore, the limitation of the access range from the instruction to the symbol address is +-2GB. Under this circumstance, the kernel cannot load a kernel module if this module has static per-CPU symbols declared by DEFINE_PER_CPU(). The reason is that kernel relocates the .data..percpu section of the kernel module to the end of kernel's .data..percpu. Hence, the distance between the per-CPU symbols and the instruction will exceed the 2GB limits. To solve this problem, the kernel should place the loaded module in the memory area [&_end-2G, VMALLOC_END]. Signed-off-by: Vincent Chen <vincent.chen@sifive.com> Suggested-by: Alexandre Ghiti <alex@ghiti.fr> Suggested-by: Anup Patel <anup@brainfault.org> Tested-by: Alexandre Ghiti <alex@ghiti.fr> Tested-by: Carlos de Paula <me@carlosedp.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>		2020-03-03 10:27:45 -08:00
..
boot	riscv: Fix gitignore	2020-02-19 16:13:51 -08:00
configs	Merge branch 'next/defconfig-add-debug' into for-next	2019-11-22 18:59:23 -08:00
include	riscv: set pmp configuration if kernel is running in M-mode	2020-02-18 09:41:24 -08:00
kernel	riscv: avoid the PIC offset of static percpu data in module beyond 2G limits	2020-03-03 10:27:45 -08:00
lib	riscv: Add KASAN support	2020-01-22 13:09:58 -08:00
mm	riscv: adjust the indent	2020-02-24 13:12:53 -08:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2019-12-27 14:20:10 -08:00
Kbuild	riscv: add arch/riscv/Kbuild	2019-08-30 17:34:00 -07:00
Kconfig	riscv: mm: add support for CONFIG_DEBUG_VIRTUAL	2020-01-23 10:40:06 -08:00
Kconfig.debug	RISC-V: Remove EARLY_PRINTK support	2018-12-17 10:23:46 -08:00
Kconfig.socs	riscv: only select serial sifive if TTY is enabled	2019-12-08 20:29:01 -08:00
Makefile	riscv: provide a flat image loader	2019-11-17 15:17:39 -08:00