search for: bpf

...The guest redirector was a simple sockmap echo server, > redirecting unix ingress to vsock 2:1234 egress. > - Same sender and server programs > > *Note: these numbers are from RFC v1 > > Only the virtio transport has been tested. The loopback transport was > used in writing bpf/selftests, but not thoroughly tested otherwise. > > This series requires the skb patch. > > Changes in v3: > - vsock/bpf: Refactor wait logic in vsock_bpf_recvmsg() to avoid > backwards goto > - vsock/bpf: Check psock before acquiring slock > - vsock/bpf: Return bool ins...

Hi, Tom, Considering the severity of this bug, I would like to go ahead to push the fix into release_50 branch. The fix has been tested in the trunk and by various people as well and I will also make sure all BPF tests passed before the push. Thanks! Yonghong On Fri, Dec 1, 2017 at 10:18 AM, Y Song <ys114321 at gmail.com> wrote: > Hi, Tom, > > I have a BPF backend bug which is pretty noxious which is introduced > in 5.0 and fixed in 6.0 trunk. > The detailed of the backport commit is...

On 8/4/15 11:51 PM, Wangnan (F) wrote: > void bpf_store_half(void *skb, int off, int val) > asm("llvm.bpf.store.half"); > int func() > { > bpf_store_half(0, 0, 0); > return 0; > } > > Compiled with: > > $ clang -g -target bpf -O2 -S -c test.c > > And get this: > > .text...

Dear there, I was trying to use clang to cross compile executable directly on my mac to bpf ISA: clang -target bpf-linux-gnu aaa.c But I guess maybe the linker does not support BPF? (with -c clang can generate unlinked objs) Unexpected arch UNREACHABLE executed at llvm/tools/clang/lib/Driver/Tools.cpp:8113 Should I use other linkers to link clang generated BPF objs? Thanks, Xiaochu -...

On Thu, Jun 4, 2015 at 5:51 AM, Daniel Sanders <daniel.sanders at imgtec.com> wrote: > Author: dsanders > Date: Thu Jun 4 07:51:20 2015 > New Revision: 239035 > > Include BPF target in CMake builds. > > Modified: > llvm/trunk/CMakeLists.txt > > --- llvm/trunk/CMakeLists.txt (original) > +++ llvm/trunk/CMakeLists.txt Thu Jun 4 07:51:20 2015 > @@ -169,6 +169,7 @@ set(LLVM_INCLUDE_DIR ${CMAKE_CURRENT_BIN > set(LLVM_ALL_TARGETS > AArch64...

...> Hi, Alexei >> >> On 2015/7/28 10:18, Alexei Starovoitov wrote: >>> On 7/25/15 3:04 AM, He Kuang wrote: >>>> I noticed that for 64-bit elf format, the reloc sections have >>>> 'Addend' in the entry, but there's no 'Addend' info in bpf elf >>>> file(64bit). I think there must be something wrong in the process >>>> of .s -> .o, which related to 64bit/32bit. Anyway, we can parse out the >>>> AT_name now, DW_AT_LOCATION still missed and need your help. >>> Another thing about DW_AT_na...

Hello llvm-dev, I'm working on a project that is looking at using BPF as the underlying instruction set for running programs in a protected environment. We have a working prototype but have run into a few issues and missing functionality. It appears these might be due to BPF development being focused on usage in the Linux kernel. Our requirements are broader (roda...

Hello. I've tried to add some simple arithmetic vector operations to the BPF backend available in the LLVM repo. Because I added in BPFRegisterInfo.td another RegisterClass (taken from the Mips backend): def MSA128W: RegisterClass<"BPF", [v2i64, v2f64], 128, (sequence "W%u", 0, 31)>; in order to support vector for e...

Hi Alexei, I haven't tried to run code yet. The clang frontend can generate machine code for bpf but llc does not do the job. When i use : llc -march bpf -filetype=obj arith.bc It has this error message: Assertion failed: (isa<X>(Val) && "cast<Ty>() argument of incompatible type!"), function cast, file /Users/xil174/Experiments/vcore_tool/llvm/include/llvm/Supp...

...ms is highly error prone, not least because it bypasses the kbuild infrastructure entirely and so may end up referencing other header files that have not been generated. Subsequent patches will cause compiler.h to pull in the ungenerated asm/rwonce.h file via filter.h, breaking the build for tools/bpf: | $ make -C tools/bpf | make: Entering directory '/linux/tools/bpf' | CC bpf_jit_disasm.o | LINK bpf_jit_disasm | CC bpf_dbg.o | In file included from /linux/include/uapi/linux/filter.h:9, | from /linux/tools/bpf/bpf_dbg.c:41: | /linu...

...ms is highly error prone, not least because it bypasses the kbuild infrastructure entirely and so may end up referencing other header files that have not been generated. Subsequent patches will cause compiler.h to pull in the ungenerated asm/rwonce.h file via filter.h, breaking the build for tools/bpf: | $ make -C tools/bpf | make: Entering directory '/linux/tools/bpf' | CC bpf_jit_disasm.o | LINK bpf_jit_disasm | CC bpf_dbg.o | In file included from /linux/include/uapi/linux/filter.h:9, | from /linux/tools/bpf/bpf_dbg.c:41: | /linu...

Hi All, I'd like to propose to upgrade BPF backend to first class citizen. Current status of it: - used with linux kernel on x64, arm64, s390 architectures - projects that use it: perf, tc, ovs - there are few front-ends in the works: . one is translating custom language to C and then using clang/llvm . another is generating llvm IR dire...

I was trying to find some documentation for this field and the best I could find is: https://github.com/oVirt/vdsm/blob/master/lib/vdsm/storage/constants.py What do the numbers mean? The comments in the file indicate that strings are valid too (eg. DISKTYPE=OVFS). Also this patch as written will affect -o vdsm mode too (another deprecated-ish mode where we write directly to the Storage

Hi, I've tagged the 5.0.1-rc2 release, go ahead and start testing and report your results. -Tom

Hi all, I am trying to insert instructions into the bpf using the bpf syscall, the instructions were generated using the following command line: clang -I ~/Builds/bpf_rss/iproute2/include -Wall -target bpf -O2 -emit-llvm -c upstream/qemu/hw/net/rss_tap_bpf_program.c -o - | llc -march=bpf -filetype=obj -o tap_bpf_program.o and then were translated to b...

...> For people who in llvmdev: >> >> This mail is belong to a thread in linux kernel mailing list, the >> first message >> can be retrived from: >> >> http://lkml.kernel.org/r/55B1535E.8090406 at plumgrid.com >> >> Our goal is to fild a way to make BPF program get an unique ID for >> each type >> so it can pass the ID to other part of kernel, then we can retrive >> the type and >> decode the structure using DWARF information. Currently we have two >> problem >> needs to solve: >> >> 1. Dwarf info...

Hi all, I've disabled cgroups v1 on my system with the kernel boot option "systemd.unified_cgroup_hierarchy=1". Since doing so, USB hotplugging fails to work, seemingly due to a permissions problem with BPF. Please note that the technique I'm going to describe worked just fine for hotplugging USB devices to running domains until this change. Attaching / detaching USB devices when the domain is down still works as expected. I get the same error when attaching a device in virt-manager, as I do when...

...stall nessus and it would not compile: ===> Configuring for nessus-libraries-2.2.9_1 ******************************************************** * W a r n i n g * * * * Nessus needs Berkeley Packet Filter (bpf). * * To use nessus, your kernel must be rebuilt with bpf, * * and make bpf devices on /dev directory. * * * * Be sure to build as many bpf devices as you need. * * For more info on this read files/README.BPF *...

On Wed, Jun 15, 2016 at 2:37 PM, Richard Henderson via iovisor-dev <iovisor-dev at lists.iovisor.org> wrote: > This same value for EM_BPF is being propagated to glibc, > elfutils, and binutils. great! Can you share the link to glibc and the other patches? > diff --git a/include/llvm/Support/ELF.h b/include/llvm/Support/ELF.h > index 352fd8a..fb8ff71 100644 > --- a/include/llvm/Support/ELF.h > +++ b/include/llvm/Suppo...

On 06/16/2016 06:57 PM, Richard Henderson via iovisor-dev wrote: > On 06/15/2016 10:14 PM, Alexei Starovoitov wrote: >> On Wed, Jun 15, 2016 at 2:37 PM, Richard Henderson via iovisor-dev >> <iovisor-dev at lists.iovisor.org> wrote: >>> This same value for EM_BPF is being propagated to glibc, >>> elfutils, and binutils. >> >> great! >> Can you share the link to glibc and the other patches? > > https://sourceware.org/ml/libc-alpha/2016-06/msg00212.html > > https://lists.fedorahosted.org/archives/list/elfutils-devel at l...