Linux-kselftest-mirror April 2022

linux-kselftest-mirror@lists.linaro.org

129 participants
185 discussions

[PATCH AUTOSEL 5.17 052/149] kvm: selftests: aarch64: fix assert in gicv3_access_reg

by Sasha Levin

From: Ricardo Koller <ricarkol(a)google.com> [ Upstream commit cc94d47ce16d4147d546e47c8248e8bd12ba5fe5 ] The val argument in gicv3_access_reg can have any value when used for a read, not necessarily 0. Fix the assert by checking val only for writes. Signed-off-by: Ricardo Koller <ricarkol(a)google.com> Reported-by: Reiji Watanabe <reijiw(a)google.com> Cc: Andrew Jones <drjones(a)redhat.com> Reviewed-by: Andrew Jones <drjones(a)redhat.com> Signed-off-by: Marc Zyngier <maz(a)kernel.org> Link: https://lore.kernel.org/r/20220127030858.3269036-2-ricarkol@google.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/kvm/lib/aarch64/gic_v3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/lib/aarch64/gic_v3.c b/tools/testing/selftests/kvm/lib/aarch64/gic_v3.c index 00f613c0583c..e4945fe66620 100644 --- a/tools/testing/selftests/kvm/lib/aarch64/gic_v3.c +++ b/tools/testing/selftests/kvm/lib/aarch64/gic_v3.c @@ -159,7 +159,7 @@ static void gicv3_access_reg(uint32_t intid, uint64_t offset, uint32_t cpu_or_dist; GUEST_ASSERT(bits_per_field <= reg_bits); - GUEST_ASSERT(*val < (1U << bits_per_field)); + GUEST_ASSERT(!write || *val < (1U << bits_per_field)); /* Some registers like IROUTER are 64 bit long. Those are currently not * supported by readl nor writel, so just asserting here until then. */ -- 2.34.1

2 years, 6 months

[PATCH AUTOSEL 5.17 019/149] selftests, xsk: Fix bpf_res cleanup test

by Sasha Levin

From: Magnus Karlsson <magnus.karlsson(a)intel.com> [ Upstream commit 3b22523bca02b0d5618c08b93d8fd1fb578e1cc3 ] After commit 710ad98c363a ("veth: Do not record rx queue hint in veth_xmit"), veth no longer receives traffic on the same queue as it was sent on. This breaks the bpf_res test for the AF_XDP selftests as the socket tied to queue 1 will not receive traffic anymore. Modify the test so that two sockets are tied to queue id 0 using a shared umem instead. When killing the first socket enter the second socket into the xskmap so that traffic will flow to it. This will still test that the resources are not cleaned up until after the second socket dies, without having to rely on veth supporting rx_queue hints. Reported-by: Maciej Fijalkowski <maciej.fijalkowski(a)intel.com> Signed-off-by: Magnus Karlsson <magnus.karlsson(a)intel.com> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski(a)intel.com> Acked-by: John Fastabend <john.fastabend(a)gmail.com> Link: https://lore.kernel.org/bpf/20220125082945.26179-1-magnus.karlsson@gmail.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/xdpxceiver.c | 80 +++++++++++++++--------- tools/testing/selftests/bpf/xdpxceiver.h | 2 +- 2 files changed, 50 insertions(+), 32 deletions(-) diff --git a/tools/testing/selftests/bpf/xdpxceiver.c b/tools/testing/selftests/bpf/xdpxceiver.c index 0a5d23da486d..4686897181b6 100644 --- a/tools/testing/selftests/bpf/xdpxceiver.c +++ b/tools/testing/selftests/bpf/xdpxceiver.c @@ -266,22 +266,24 @@ static int xsk_configure_umem(struct xsk_umem_info *umem, void *buffer, u64 size } static int xsk_configure_socket(struct xsk_socket_info *xsk, struct xsk_umem_info *umem, - struct ifobject *ifobject, u32 qid) + struct ifobject *ifobject, bool shared) { - struct xsk_socket_config cfg; + struct xsk_socket_config cfg = {}; struct xsk_ring_cons *rxr; struct xsk_ring_prod *txr; xsk->umem = umem; cfg.rx_size = xsk->rxqsize; cfg.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS; - cfg.libbpf_flags = 0; + cfg.libbpf_flags = XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD; cfg.xdp_flags = ifobject->xdp_flags; cfg.bind_flags = ifobject->bind_flags; + if (shared) + cfg.bind_flags |= XDP_SHARED_UMEM; txr = ifobject->tx_on ? &xsk->tx : NULL; rxr = ifobject->rx_on ? &xsk->rx : NULL; - return xsk_socket__create(&xsk->xsk, ifobject->ifname, qid, umem->umem, rxr, txr, &cfg); + return xsk_socket__create(&xsk->xsk, ifobject->ifname, 0, umem->umem, rxr, txr, &cfg); } static struct option long_options[] = { @@ -387,7 +389,6 @@ static void __test_spec_init(struct test_spec *test, struct ifobject *ifobj_tx, for (i = 0; i < MAX_INTERFACES; i++) { struct ifobject *ifobj = i ? ifobj_rx : ifobj_tx; - ifobj->umem = &ifobj->umem_arr[0]; ifobj->xsk = &ifobj->xsk_arr[0]; ifobj->use_poll = false; ifobj->pacing_on = true; @@ -401,11 +402,12 @@ static void __test_spec_init(struct test_spec *test, struct ifobject *ifobj_tx, ifobj->tx_on = false; } + memset(ifobj->umem, 0, sizeof(*ifobj->umem)); + ifobj->umem->num_frames = DEFAULT_UMEM_BUFFERS; + ifobj->umem->frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE; + for (j = 0; j < MAX_SOCKETS; j++) { - memset(&ifobj->umem_arr[j], 0, sizeof(ifobj->umem_arr[j])); memset(&ifobj->xsk_arr[j], 0, sizeof(ifobj->xsk_arr[j])); - ifobj->umem_arr[j].num_frames = DEFAULT_UMEM_BUFFERS; - ifobj->umem_arr[j].frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE; ifobj->xsk_arr[j].rxqsize = XSK_RING_CONS__DEFAULT_NUM_DESCS; } } @@ -947,7 +949,10 @@ static void tx_stats_validate(struct ifobject *ifobject) static void thread_common_ops(struct test_spec *test, struct ifobject *ifobject) { + u64 umem_sz = ifobject->umem->num_frames * ifobject->umem->frame_size; int mmap_flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE; + int ret, ifindex; + void *bufs; u32 i; ifobject->ns_fd = switch_namespace(ifobject->nsname); @@ -955,23 +960,20 @@ static void thread_common_ops(struct test_spec *test, struct ifobject *ifobject) if (ifobject->umem->unaligned_mode) mmap_flags |= MAP_HUGETLB; - for (i = 0; i < test->nb_sockets; i++) { - u64 umem_sz = ifobject->umem->num_frames * ifobject->umem->frame_size; - u32 ctr = 0; - void *bufs; - int ret; + bufs = mmap(NULL, umem_sz, PROT_READ | PROT_WRITE, mmap_flags, -1, 0); + if (bufs == MAP_FAILED) + exit_with_error(errno); - bufs = mmap(NULL, umem_sz, PROT_READ | PROT_WRITE, mmap_flags, -1, 0); - if (bufs == MAP_FAILED) - exit_with_error(errno); + ret = xsk_configure_umem(ifobject->umem, bufs, umem_sz); + if (ret) + exit_with_error(-ret); - ret = xsk_configure_umem(&ifobject->umem_arr[i], bufs, umem_sz); - if (ret) - exit_with_error(-ret); + for (i = 0; i < test->nb_sockets; i++) { + u32 ctr = 0; while (ctr++ < SOCK_RECONF_CTR) { - ret = xsk_configure_socket(&ifobject->xsk_arr[i], &ifobject->umem_arr[i], - ifobject, i); + ret = xsk_configure_socket(&ifobject->xsk_arr[i], ifobject->umem, + ifobject, !!i); if (!ret) break; @@ -982,8 +984,22 @@ static void thread_common_ops(struct test_spec *test, struct ifobject *ifobject) } } - ifobject->umem = &ifobject->umem_arr[0]; ifobject->xsk = &ifobject->xsk_arr[0]; + + if (!ifobject->rx_on) + return; + + ifindex = if_nametoindex(ifobject->ifname); + if (!ifindex) + exit_with_error(errno); + + ret = xsk_setup_xdp_prog(ifindex, &ifobject->xsk_map_fd); + if (ret) + exit_with_error(-ret); + + ret = xsk_socket__update_xskmap(ifobject->xsk->xsk, ifobject->xsk_map_fd); + if (ret) + exit_with_error(-ret); } static void testapp_cleanup_xsk_res(struct ifobject *ifobj) @@ -1139,14 +1155,16 @@ static void testapp_bidi(struct test_spec *test) static void swap_xsk_resources(struct ifobject *ifobj_tx, struct ifobject *ifobj_rx) { + int ret; + xsk_socket__delete(ifobj_tx->xsk->xsk); - xsk_umem__delete(ifobj_tx->umem->umem); xsk_socket__delete(ifobj_rx->xsk->xsk); - xsk_umem__delete(ifobj_rx->umem->umem); - ifobj_tx->umem = &ifobj_tx->umem_arr[1]; ifobj_tx->xsk = &ifobj_tx->xsk_arr[1]; - ifobj_rx->umem = &ifobj_rx->umem_arr[1]; ifobj_rx->xsk = &ifobj_rx->xsk_arr[1]; + + ret = xsk_socket__update_xskmap(ifobj_rx->xsk->xsk, ifobj_rx->xsk_map_fd); + if (ret) + exit_with_error(-ret); } static void testapp_bpf_res(struct test_spec *test) @@ -1405,13 +1423,13 @@ static struct ifobject *ifobject_create(void) if (!ifobj->xsk_arr) goto out_xsk_arr; - ifobj->umem_arr = calloc(MAX_SOCKETS, sizeof(*ifobj->umem_arr)); - if (!ifobj->umem_arr) - goto out_umem_arr; + ifobj->umem = calloc(1, sizeof(*ifobj->umem)); + if (!ifobj->umem) + goto out_umem; return ifobj; -out_umem_arr: +out_umem: free(ifobj->xsk_arr); out_xsk_arr: free(ifobj); @@ -1420,7 +1438,7 @@ static struct ifobject *ifobject_create(void) static void ifobject_delete(struct ifobject *ifobj) { - free(ifobj->umem_arr); + free(ifobj->umem); free(ifobj->xsk_arr); free(ifobj); } diff --git a/tools/testing/selftests/bpf/xdpxceiver.h b/tools/testing/selftests/bpf/xdpxceiver.h index 2f705f44b748..62a3e6388632 100644 --- a/tools/testing/selftests/bpf/xdpxceiver.h +++ b/tools/testing/selftests/bpf/xdpxceiver.h @@ -125,10 +125,10 @@ struct ifobject { struct xsk_socket_info *xsk; struct xsk_socket_info *xsk_arr; struct xsk_umem_info *umem; - struct xsk_umem_info *umem_arr; thread_func_t func_ptr; struct pkt_stream *pkt_stream; int ns_fd; + int xsk_map_fd; u32 dst_ip; u32 src_ip; u32 xdp_flags; -- 2.34.1

2 years, 6 months

[PATCH bpf-next v3 00/17] Introduce eBPF support for HID devices

by Benjamin Tissoires

Hi, This is a followup of my v1 at [0] and v2 at [1]. The short summary of the previous cover letter and discussions is that HID could benefit from BPF for the following use cases: - simple fixup of report descriptor: benefits are faster development time and testing, with the produced bpf program being shipped in the kernel directly (the shipping part is *not* addressed here). - Universal Stylus Interface: allows a user-space program to define its own kernel interface - Surface Dial: somehow similar to the previous one except that userspace can decide to change the shape of the exported device - firewall: still partly missing there, there is not yet interception of hidraw calls, but it's coming in a followup series, I promise - tracing: well, tracing. I think I addressed the comments from the previous version, but there are a few things I'd like to note here: - I did not take the various rev-by and tested-by (thanks a lot for those) because the uapi changed significantly in v3, so I am not very confident in taking those rev-by blindly - I mentioned in my discussion with Song that I'll put a summary of the uapi in the cover letter, but I ended up adding a (long) file in the Documentation directory. So please maybe start by reading 17/17 to have an overview of what I want to achieve - I added in the libbpf and bpf the new type BPF_HID_DRIVER_EVENT, even though I don't have a user of it right now in the kernel. I wanted to have them in the docs, but we might not want to have them ready here. In terms of code, it just means that we can attach such programs types but that they will never get triggered. Anyway, I have been mulling on this for the past 2 weeks, and I think that maybe sharing this now is better than me just starring at the code over and over. Short summary of changes: v3: === - squashed back together most of the libbpf and bpf changes into bigger commits that give a better overview of the whole interactions - reworked the user API to not expose .data as a directly accessible field from the context, but instead forces everyone to use hid_bpf_get_data (or get/set_bits) - added BPF_HID_DRIVER_EVENT (see note above) - addressed the various nitpicks from v2 - added a big Documentation file (and so adding now the doc maintainers to the long list of recipients) v2: === - split the series by subsystem (bpf, HID, libbpf, selftests and samples) - Added an extra patch at the beginning to not require CAP_NET_ADMIN for BPF_PROG_TYPE_LIRC_MODE2 (please shout if this is wrong) - made the bpf context attached to HID program of dynamic size: * the first 1 kB will be able to be addressed directly * the rest can be retrieved through bpf_hid_{set|get}_data (note that I am definitivey not happy with that API, because there is part of it in bits and other in bytes. ouch) - added an extra patch to prevent non GPL HID bpf programs to be loaded of type BPF_PROG_TYPE_HID * same here, not really happy but I don't know where to put that check in verifier.c - added a new flag BPF_F_INSERT_HEAD for BPF_LINK_CREATE syscall when in used with HID program types. * this flag is used for tracing, to be able to load a program before any others that might already have been inserted and that might change the data stream. Cheers, Benjamin [0] https://lore.kernel.org/linux-input/20220224110828.2168231-1-benjamin.tisso… [1] https://lore.kernel.org/linux-input/20220304172852.274126-1-benjamin.tissoi… Benjamin Tissoires (17): bpf: add new is_sys_admin_prog_type() helper bpf: introduce hid program type bpf/verifier: prevent non GPL programs to be loaded against HID libbpf: add HID program type and API HID: hook up with bpf HID: allow to change the report descriptor from an eBPF program selftests/bpf: add tests for the HID-bpf initial implementation selftests/bpf: add report descriptor fixup tests selftests/bpf: Add a test for BPF_F_INSERT_HEAD selftests/bpf: add test for user call of HID bpf programs samples/bpf: add new hid_mouse example bpf/hid: add more HID helpers HID: bpf: implement hid_bpf_get|set_bits HID: add implementation of bpf_hid_raw_request selftests/bpf: add tests for hid_{get|set}_bits helpers selftests/bpf: add tests for bpf_hid_hw_request Documentation: add HID-BPF docs Documentation/hid/hid-bpf.rst | 444 +++++++++++ Documentation/hid/index.rst | 1 + drivers/hid/Makefile | 1 + drivers/hid/hid-bpf.c | 328 ++++++++ drivers/hid/hid-core.c | 34 +- include/linux/bpf-hid.h | 127 +++ include/linux/bpf_types.h | 4 + include/linux/hid.h | 36 +- include/uapi/linux/bpf.h | 67 ++ include/uapi/linux/bpf_hid.h | 71 ++ include/uapi/linux/hid.h | 10 + kernel/bpf/Makefile | 3 + kernel/bpf/btf.c | 1 + kernel/bpf/hid.c | 728 +++++++++++++++++ kernel/bpf/syscall.c | 27 +- kernel/bpf/verifier.c | 7 + samples/bpf/.gitignore | 1 + samples/bpf/Makefile | 4 + samples/bpf/hid_mouse_kern.c | 117 +++ samples/bpf/hid_mouse_user.c | 129 +++ tools/include/uapi/linux/bpf.h | 67 ++ tools/lib/bpf/libbpf.c | 23 +- tools/lib/bpf/libbpf.h | 2 + tools/lib/bpf/libbpf.map | 1 + tools/testing/selftests/bpf/config | 3 + tools/testing/selftests/bpf/prog_tests/hid.c | 788 +++++++++++++++++++ tools/testing/selftests/bpf/progs/hid.c | 205 +++++ 27 files changed, 3204 insertions(+), 25 deletions(-) create mode 100644 Documentation/hid/hid-bpf.rst create mode 100644 drivers/hid/hid-bpf.c create mode 100644 include/linux/bpf-hid.h create mode 100644 include/uapi/linux/bpf_hid.h create mode 100644 kernel/bpf/hid.c create mode 100644 samples/bpf/hid_mouse_kern.c create mode 100644 samples/bpf/hid_mouse_user.c create mode 100644 tools/testing/selftests/bpf/prog_tests/hid.c create mode 100644 tools/testing/selftests/bpf/progs/hid.c -- 2.35.1

2 years, 6 months

lkft kselftest for next-20220401

by lkft＠linaro.org

## Build * kernel: 5.17.0 * git: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next * git branch: master * git commit: e5071887cd2296a7704dbcd10c1cedf0f11cdbd5 * git describe: next-20220401 * test details: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20220401 ## Test Regressions (compared to next-20220302) No test regressions found. ## Metric Regressions (compared to next-20220302) No metric regressions found. Tested-by: Linux Kernel Functional Testing <lkft(a)linaro.org> ## Test Fixes (compared to next-20220302) No test fixes found. ## Metric Fixes (compared to next-20220302) No metric fixes found. ## Test result summary total: 0, pass: 0, fail: 0, skip: 0, xfail: 0 ## Build Summary ## Test suites summary -- Linaro LKFT https://lkft.linaro.org

2 years, 6 months

RE: clarification on tap_timeout function

by P T, Sarath

Hi Team, Can anyone help me on this ? Hope you will do the needful as soon as possible. Regards Sarath P T From: P T, Sarath Sent: 14 March 2022 13:19 To: 'linux-kselftest-mirror(a)lists.linaro.org' <linux-kselftest-mirror(a)lists.linaro.org> Subject: clarification on tap_timeout function Hi Team, I need a clarification the function "tap_timeout" which is being used in the runner.sh , the one will give the result format in the TAP 13 protocol. Below I am giving the function. tap_timeout() { # Make sure tests will time out if utility is available. if [ -x /usr/bin/timeout ] ; then /usr/bin/timeout --foreground "$kselftest_timeout" "$1" else "$1" fi } Need a clarification why we are using the function "tap_timout" and why the "kselftest_timeout" variable declared as 45 seconds by default. It will be very helpful if you are clarifying these things for me. Regards Sarath PT

2 years, 6 months

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Linux-kselftest-mirror April 2022