linux/arch/arm64
Zi Shen Lim 42ff712bc0 arm64: bpf: add extra pass to handle faulty codegen
Code generation functions in arch/arm64/kernel/insn.c previously
BUG_ON invalid parameters. Following change of that behavior, now we
need to handle the error case where AARCH64_BREAK_FAULT is returned.

Instead of error-handling on every emit() in JIT, we add a new
validation pass at the end of JIT compilation. There's no point in
running JITed code at run-time only to trap due to AARCH64_BREAK_FAULT.
Instead, we drop this failed JIT compilation and allow the system to
gracefully fallback on the BPF interpreter.

Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Suggested-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-17 19:15:26 -05:00
..
boot Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-01-15 13:33:12 -08:00
configs arm64 fixes and clean-ups: 2015-11-12 15:33:11 -08:00
crypto arm64: crypto: reduce priority of core AES cipher 2015-11-18 12:09:08 +00:00
include * s390: Support for runtime instrumentation within guests, 2016-01-12 13:22:12 -08:00
kernel arm64: insn: remove BUG_ON from codegen 2016-01-17 19:15:26 -05:00
kvm arm64: KVM: Add support for 16-bit VMID 2015-12-18 10:15:12 +00:00
lib arm64: add KASAN support 2015-10-12 17:46:36 +01:00
mm arm64: mm: support ARCH_MMAP_RND_BITS 2016-01-14 16:00:49 -08:00
net arm64: bpf: add extra pass to handle faulty codegen 2016-01-17 19:15:26 -05:00
xen xen/arm: introduce HYPERVISOR_platform_op on arm and arm64 2015-12-21 14:40:56 +00:00
Kconfig arm64: mm: support ARCH_MMAP_RND_BITS 2016-01-14 16:00:49 -08:00
Kconfig.debug arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug 2016-01-09 06:30:49 -08:00
Kconfig.platforms ARM: DT updates for v4.4 2015-11-10 15:06:26 -08:00
Makefile arm64 updates for 4.4: 2015-11-04 14:47:13 -08:00