Re: [PATCH] arm64: Allow vmalloc regions to be set with set_memory_*
From: Alexei Starovoitov
Date: Tue Jan 12 2016 - 19:01:25 EST
On Tue, Jan 12, 2016 at 01:46:27PM -0800, Laura Abbott wrote:
> The range of set_memory_* is currently restricted to the module address
> range because of difficulties in breaking down larger block sizes.
> vmalloc maps PAGE_SIZE pages so it is safe to use as well. Update the
> function ranges and add a comment explaining why the range is restricted
> the way it is.
> Signed-off-by: Laura Abbott <labbott@xxxxxxxxxxxxxxxxx>
> This should let the protections for the eBPF work as expected, I don't
> know if there is some sort of self test for thatL.
you can test it with:
# sysctl net.core.bpf_jit_enable=1
# insmod test_bpf.ko
On x64 it shows:
test_bpf: Summary: 291 PASSED, 0 FAILED, [282/283 JIT'ed]
arm64 may have less JIT'ed tests.