Paul Chaignon 0fd800b245 bpftool: Probe for instruction set extensions ... This patch introduces new probes to check whether the kernel supports instruction set extensions v2 and v3. The first introduced eBPF instructions BPF_J{LT,LE,SLT,SLE} in commit 92b31a9af7 ("bpf: add BPF_J{LT,LE,SLT,SLE} instructions"). The second introduces 32-bit variants of all jump instructions in commit 092ed0968b ("bpf: verifier support JMP32"). These probes are useful for userspace BPF projects that want to use newer instruction set extensions on newer kernels, to reduce the programs' sizes or their complexity. LLVM already provides an mcpu=probe option to automatically probe the kernel and select the newest-supported instruction set extension. That is however not flexible enough for all use cases. For example, in Cilium, we only want to use the v3 instruction set extension on v5.10+, even though it is supported on all kernels v5.1+. Signed-off-by: Paul Chaignon <paul@isovalent.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Quentin Monnet <quentin@isovalent.com> Link: https://lore.kernel.org/bpf/3bfedcd9898c1f41ac67ca61f144fec84c6c3a92.1641314075.git.paul@isovalent.com		2022-01-05 13:31:40 +01:00
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accounting
arch	tools headers UAPI: Sync x86's asm/kvm.h with the kernel sources	2021-11-18 10:08:07 -03:00
bootconfig
bpf	bpftool: Probe for instruction set extensions	2022-01-05 13:31:40 +01:00
build	Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-12-10 15:56:13 -08:00
cgroup
counter
debugging
edid
firewire
firmware
gpio
hv
iio
include	bpf: Add get_func_[arg|ret|arg_cnt] helpers	2021-12-13 09:25:59 -08:00
io_uring
kvm/kvm_stat
laptop
leds
lib	libbpf: Improve LINUX_VERSION_CODE detection	2021-12-28 19:20:31 -08:00
memory-model
objtool	objtool: Fix pv_ops noinstr validation	2021-12-03 09:11:42 +01:00
pci
pcmcia
perf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-12-31 14:35:40 +00:00
power	ACPI: tools: Fix compilation when output directory is not present	2021-12-08 15:10:27 +01:00
rcu
scripts	tools: Help cross-building with clang	2021-12-16 12:15:04 -08:00
spi
testing	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-12-31 14:35:40 +00:00
thermal/tmon
time
tracing	tools/latency-collector: Use correct size when writing queue_full_warning	2021-10-25 22:27:19 -04:00
usb
virtio
vm	tools/vm/page-types.c: print file offset in hexadecimal	2021-11-06 13:30:40 -07:00
wmi
Makefile	tools/lib/lockdep: drop liblockdep	2021-11-12 11:07:17 -08:00