summaryrefslogtreecommitdiff
path: root/arch/riscv/net
diff options
context:
space:
mode:
authorBjörn Töpel <bjorn.topel@gmail.com>2019-12-16 12:13:40 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2019-12-19 18:03:31 +0300
commit7f3631e88ee6fb13beac333a0e9e605d2414d17f (patch)
tree83de14e24c5f18b8d1197c815df60556471a37f6 /arch/riscv/net
parentfe8322b866d560a3b3535ed9aa49df59809decbe (diff)
downloadlinux-7f3631e88ee6fb13beac333a0e9e605d2414d17f.tar.xz
riscv, bpf: Provide RISC-V specific JIT image alloc/free
This commit makes sure that the JIT images is kept close to the kernel text, so BPF calls can use relative calling with auipc/jalr or jal instead of loading the full 64-bit address and jalr. The BPF JIT image region is 128 MB before the kernel text. Signed-off-by: Björn Töpel <bjorn.topel@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20191216091343.23260-7-bjorn.topel@gmail.com
Diffstat (limited to 'arch/riscv/net')
-rw-r--r--arch/riscv/net/bpf_jit_comp.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/riscv/net/bpf_jit_comp.c b/arch/riscv/net/bpf_jit_comp.c
index 8aa19c846881..46cff093f526 100644
--- a/arch/riscv/net/bpf_jit_comp.c
+++ b/arch/riscv/net/bpf_jit_comp.c
@@ -1656,3 +1656,16 @@ out:
tmp : orig_prog);
return prog;
}
+
+void *bpf_jit_alloc_exec(unsigned long size)
+{
+ return __vmalloc_node_range(size, PAGE_SIZE, BPF_JIT_REGION_START,
+ BPF_JIT_REGION_END, GFP_KERNEL,
+ PAGE_KERNEL_EXEC, 0, NUMA_NO_NODE,
+ __builtin_return_address(0));
+}
+
+void bpf_jit_free_exec(void *addr)
+{
+ return vfree(addr);
+}