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authorBjörn Töpel <bjorn.topel@gmail.com>2019-02-05 13:41:24 +0100
committerDaniel Borkmann <daniel@iogearbox.net>2019-02-05 16:56:10 +0100
commite8cb0167ae684ed2f73cd880c385b74ef2ae702e (patch)
tree17940eac45c3c176c6eb1aee80a25f41f680541e /Documentation/networking/filter.txt
parentMAINTAINERS: add RISC-V BPF JIT maintainer (diff)
downloadlinux-dev-e8cb0167ae684ed2f73cd880c385b74ef2ae702e.tar.xz
linux-dev-e8cb0167ae684ed2f73cd880c385b74ef2ae702e.zip
bpf, doc: add RISC-V JIT to BPF documentation
Update Documentation/networking/filter.txt and Documentation/sysctl/net.txt to mention RISC-V. Signed-off-by: Björn Töpel <bjorn.topel@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'Documentation/networking/filter.txt')
-rw-r--r--Documentation/networking/filter.txt16
1 files changed, 9 insertions, 7 deletions
diff --git a/Documentation/networking/filter.txt b/Documentation/networking/filter.txt
index 01603bc2eff1..b5e060edfc38 100644
--- a/Documentation/networking/filter.txt
+++ b/Documentation/networking/filter.txt
@@ -464,10 +464,11 @@ breakpoints: 0 1
JIT compiler
------------
-The Linux kernel has a built-in BPF JIT compiler for x86_64, SPARC, PowerPC,
-ARM, ARM64, MIPS and s390 and can be enabled through CONFIG_BPF_JIT. The JIT
-compiler is transparently invoked for each attached filter from user space
-or for internal kernel users if it has been previously enabled by root:
+The Linux kernel has a built-in BPF JIT compiler for x86_64, SPARC,
+PowerPC, ARM, ARM64, MIPS, RISC-V and s390 and can be enabled through
+CONFIG_BPF_JIT. The JIT compiler is transparently invoked for each
+attached filter from user space or for internal kernel users if it has
+been previously enabled by root:
echo 1 > /proc/sys/net/core/bpf_jit_enable
@@ -603,9 +604,10 @@ got from bpf_prog_create(), and 'ctx' the given context (e.g.
skb pointer). All constraints and restrictions from bpf_check_classic() apply
before a conversion to the new layout is being done behind the scenes!
-Currently, the classic BPF format is being used for JITing on most 32-bit
-architectures, whereas x86-64, aarch64, s390x, powerpc64, sparc64, arm32 perform
-JIT compilation from eBPF instruction set.
+Currently, the classic BPF format is being used for JITing on most
+32-bit architectures, whereas x86-64, aarch64, s390x, powerpc64,
+sparc64, arm32, riscv (RV64G) perform JIT compilation from eBPF
+instruction set.
Some core changes of the new internal format: