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2018-10-17kvm: selftests: support high GPAs in dirty_log_testAndrew Jones
Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17kvm: selftests: stop lying to aarch64 tests about PA-bitsAndrew Jones
Let's add the 40 PA-bit versions of the VM modes, that AArch64 should have been using, so we can extend the dirty log test without breaking things. Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17kvm: selftests: dirty_log_test: also test 64K pages on aarch64Andrew Jones
Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17kvm: selftests: port dirty_log_test to aarch64Andrew Jones
While we're messing with the code for the port and to support guest page sizes that are less than the host page size, we also make some code formatting cleanups and apply sync_global_to_guest(). Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17kvm: selftests: introduce new VM mode for 64K pagesAndrew Jones
Rename VM_MODE_FLAT48PG to be more descriptive of its config and add a new config that has the same parameters, except with 64K pages. Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17kvm: selftests: add vcpu support for aarch64Andrew Jones
This code adds VM and VCPU setup code for the VM_MODE_FLAT48PG mode. The VM_MODE_FLAT48PG isn't yet fully supportable, as it defines the guest physical address limit as 52-bits, and KVM currently only supports guests with up to 40-bit physical addresses (see KVM_PHYS_SHIFT). VM_MODE_FLAT48PG will work fine, though, as long as no >= 40-bit physical addresses are used. Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17kvm: selftests: add virt mem support for aarch64Andrew Jones
Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17kvm: selftests: add vm_phy_pages_allocAndrew Jones
Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17kvm: selftests: tidy up kvm_utilAndrew Jones
Tidy up kvm-util code: code/comment formatting, remove unused code, and move x86 specific code out. We also move vcpu_dump() out of common code, because not all arches (AArch64) have KVM_GET_REGS. Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17kvm: selftests: add cscope make targetAndrew Jones
Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17kvm: selftests: move arch-specific files to arch-specific locationsAndrew Jones
Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17kvm: selftests: introduce ucallAndrew Jones
Rework the guest exit to userspace code to generalize the concept into what it is, a "hypercall to userspace", and provide two implementations of it: the PortIO version currently used, but only useable by x86, and an MMIO version that other architectures (except s390) can use. Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17kvm: selftests: vcpu_setup: set cr4.osfxsrAndrew Jones
Guest code may want to call functions that have variable arguments. To do so, we either need to compile with -mno-sse or enable SSE in the VCPUs. As it should be pretty safe to turn on the feature, and -mno-sse would make linking test code with standard libraries difficult, we choose the feature enabling. Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-16bpf, tls: add tls header to tools infrastructureDaniel Borkmann
Andrey reported a build error for the BPF kselftest suite when compiled on a machine which does not have tls related header bits installed natively: test_sockmap.c:120:23: fatal error: linux/tls.h: No such file or directory #include <linux/tls.h> ^ compilation terminated. Fix it by adding the header to the tools include infrastructure and add definitions such as SOL_TLS that could potentially be missing. Fixes: e9dd904708c4 ("bpf: add tls support for testing in test_sockmap") Reported-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-10-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller
Daniel Borkmann says: ==================== pull-request: bpf-next 2018-10-16 The following pull-request contains BPF updates for your *net-next* tree. The main changes are: 1) Convert BPF sockmap and kTLS to both use a new sk_msg API and enable sk_msg BPF integration for the latter, from Daniel and John. 2) Enable BPF syscall side to indicate for maps that they do not support a map lookup operation as opposed to just missing key, from Prashant. 3) Add bpftool map create command which after map creation pins the map into bpf fs for further processing, from Jakub. 4) Add bpftool support for attaching programs to maps allowing sock_map and sock_hash to be used from bpftool, from John. 5) Improve syscall BPF map update/delete path for map-in-map types to wait a RCU grace period for pending references to complete, from Daniel. 6) Couple of follow-up fixes for the BPF socket lookup to get it enabled also when IPv6 is compiled as a module, from Joe. 7) Fix a generic-XDP bug to handle the case when the Ethernet header was mangled and thus update skb's protocol and data, from Jesper. 8) Add a missing BTF header length check between header copies from user space, from Wenwen. 9) Minor fixups in libbpf to use __u32 instead u32 types and include proper perf_event.h uapi header instead of perf internal one, from Yonghong. 10) Allow to pass user-defined flags through EXTRA_CFLAGS and EXTRA_LDFLAGS to bpftool's build, from Jiri. 11) BPF kselftest tweaks to add LWTUNNEL to config fragment and to install with_addr.sh script from flow dissector selftest, from Anders. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-15selftests: pmtu: Add optional traffic captures for single testsStefano Brivio
If --trace is passed as an option and tcpdump is available, capture traffic for all relevant interfaces to per-test pcap files named <test>_<interface>.pcap. Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-15selftests: pmtu: Allow selection of single testsStefano Brivio
As number of tests is growing, it's quite convenient to allow single tests to be run. Display usage when the script is run with any invalid argument, keep existing semantics when no arguments are passed so that automated runs won't break. Instead of just looping on the list of requested tests, if any, check first that they exist, and go through them in a nested loop to keep the existing way to display test descriptions. Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-15bpf: add tls support for testing in test_sockmapJohn Fastabend
This adds a --ktls option to test_sockmap in order to enable the combination of ktls and sockmap to run, which makes for another batch of 648 test cases for both in combination. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-10-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfDavid S. Miller
Daniel Borkmann says: ==================== pull-request: bpf 2018-10-14 The following pull-request contains BPF updates for your *net* tree. The main changes are: 1) Fix xsk map update and delete operation to not call synchronize_net() but to piggy back on SOCK_RCU_FREE for sockets instead as we are not allowed to sleep under RCU, from Björn. 2) Do not change RLIMIT_MEMLOCK in reuseport_bpf selftest if the process already has unlimited RLIMIT_MEMLOCK, from Eric. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-12Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Conflicts were easy to resolve using immediate context mostly, except the cls_u32.c one where I simply too the entire HEAD chunk. Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-11selftests: use posix-style redirection in ip_defrag.shPaolo Abeni
The ip_defrag.sh script requires bash-style output redirection but use the default shell. This may cause random failures if the default shell is not bash. Address the above using posix compliant output redirection. Fixes: 02c7f38b7ace ("selftests/net: add ip_defrag selftest") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-11selftests: udpgso_bench.sh explicitly requires bashPaolo Abeni
The udpgso_bench.sh script requires several bash-only features. This may cause random failures if the default shell is not bash. Address the above explicitly requiring bash as the script interpreter Fixes: 3a687bef148d ("selftests: udp gso benchmark") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-11selftests: rtnetlink.sh explicitly requires bash.Paolo Abeni
the script rtnetlink.sh requires a bash-only features (sleep with sub-second precision). This may cause random test failure if the default shell is not bash. Address the above explicitly requiring bash as the script interpreter. Fixes: 33b01b7b4f19 ("selftests: add rtnetlink test script") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-11selftests: bpf: install script with_addr.shAnders Roxell
When test_flow_dissector.sh runs it complains that it can't find script with_addr.sh: ./test_flow_dissector.sh: line 81: ./with_addr.sh: No such file or directory Rework so that with_addr.sh gets installed, add it to TEST_PROGS_EXTENDED variable. Fixes: 50b3ed57dee9 ("selftests/bpf: test bpf flow dissection") Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-10-11selftests: bpf: add config fragment LWTUNNELAnders Roxell
When test_lwt_seg6local.sh was added commit c99a84eac026 ("selftests/bpf: test for seg6local End.BPF action") config fragment wasn't added, and without CONFIG_LWTUNNEL enabled we see this: Error: CONFIG_LWTUNNEL is not enabled in this kernel. selftests: test_lwt_seg6local [FAILED] Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-10-10selftests: mlxsw: qos_mc_aware: Make executablePetr Machata
This is a self-standing test and as such should be itself executable. Fixes: b5638d46c90a ("selftests: mlxsw: Add a test for UC behavior under MC flood") Signed-off-by: Petr Machata <petrm@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-10selftests: forwarding: Have lldpad_app_wait_set() wait for unknown, tooPetr Machata
Immediately after mlxsw module is probed and lldpad started, added APP entries are briefly in "unknown" state before becoming "pending". That's the state that lldpad_app_wait_set() typically sees, and since there are no pending entries at that time, it bails out. However the entries have not been pushed to the kernel yet at that point, and thus the test case fails. Fix by waiting for both unknown and pending entries to disappear before proceeding. Fixes: d159261f3662 ("selftests: mlxsw: Add test for trust-DSCP") Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-09selftests/bpf: add XDP selftests for modifying and popping VLAN headersJesper Dangaard Brouer
This XDP selftest also contain a small TC-bpf component. It provoke the generic-XDP bug fixed in previous commit. The selftest itself shows how to do VLAN manipulation from XDP and TC. The test demonstrate how XDP ingress can remove a VLAN tag, and how TC egress can add back a VLAN tag. This use-case originates from a production need by ISP (kviknet.dk), who gets DSL-lines terminated as VLAN Q-in-Q tagged packets, and want to avoid having an net_device for every end-customer on the box doing the L2 to L3 termination. The test-setup is done via a veth-pair and creating two network namespaces (ns1 and ns2). The 'ns1' simulate the ISP network that are loading the BPF-progs stripping and adding VLAN IDs. The 'ns2' simulate the DSL-customer that are using VLAN tagged packets. Running the script with --interactive, will simply not call the cleanup function. This gives the effect of creating a testlab, that the users can inspect and play with. The --verbose option will simply request that the shell will print input lines as they are read, this include comments, which in effect make the comments visible docs. Reported-by: Yoel Caspersen <yoel@kviknet.dk> Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-10-09bpf: make TC vlan bpf_helpers avail to selftestsJesper Dangaard Brouer
The helper bpf_skb_vlan_push is needed by next patch, and the helper bpf_skb_vlan_pop is added for completeness, regarding VLAN helpers. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-10-09selftests/bpf: test_verifier, check bpf_map_lookup_elem access in bpf progPrashant Bhole
map_lookup_elem isn't supported by certain map types like: - BPF_MAP_TYPE_PROG_ARRAY - BPF_MAP_TYPE_STACK_TRACE - BPF_MAP_TYPE_XSKMAP - BPF_MAP_TYPE_SOCKMAP/BPF_MAP_TYPE_SOCKHASH Let's add verfier tests to check whether verifier prevents bpf_map_lookup_elem call on above programs from bpf program. Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-10-09selftests/bpf: test_verifier, change names of fixup mapsPrashant Bhole
Currently fixup map are named like fixup_map1, fixup_map2, and so on. As suggested by Alexei let's change change map names such that we can identify map type by looking at the name. This patch is basically a find and replace change: fixup_map1 -> fixup_map_hash_8b fixup_map2 -> fixup_map_hash_48b fixup_map3 -> fixup_map_hash_16b fixup_map4 -> fixup_map_array_48b Suggested-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-10-09selftests: usbip: add wait after attach and before checking port statusShuah Khan (Samsung OSG)
Add sleep between attach and "usbip port" check to make sure status is updated. Running attach and query back shows incorrect status. Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-10-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller
Alexei Starovoitov says: ==================== pull-request: bpf-next 2018-10-08 The following pull-request contains BPF updates for your *net-next* tree. The main changes are: 1) sk_lookup_[tcp|udp] and sk_release helpers from Joe Stringer which allow BPF programs to perform lookups for sockets in a network namespace. This would allow programs to determine early on in processing whether the stack is expecting to receive the packet, and perform some action (eg drop, forward somewhere) based on this information. 2) per-cpu cgroup local storage from Roman Gushchin. Per-cpu cgroup local storage is very similar to simple cgroup storage except all the data is per-cpu. The main goal of per-cpu variant is to implement super fast counters (e.g. packet counters), which don't require neither lookups, neither atomic operations in a fast path. The example of these hybrid counters is in selftests/bpf/netcnt_prog.c 3) allow HW offload of programs with BPF-to-BPF function calls from Quentin Monnet 4) support more than 64-byte key/value in HW offloaded BPF maps from Jakub Kicinski 5) rename of libbpf interfaces from Andrey Ignatov. libbpf is maturing as a library and should follow good practices in library design and implementation to play well with other libraries. This patch set brings consistent naming convention to global symbols. 6) relicense libbpf as LGPL-2.1 OR BSD-2-Clause from Alexei Starovoitov to let Apache2 projects use libbpf 7) various AF_XDP fixes from Björn and Magnus ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-09Merge branch 'fixes' into nextMichael Ellerman
Merge our fixes branch. It has a few important fixes that are needed for futher testing and also some commits that will conflict with content in next.
2018-10-08selftests: pmtu: add basic IPv4 and IPv6 PMTU testsSabrina Dubroca
Commit d1f1b9cbf34c ("selftests: net: Introduce first PMTU test") and follow-ups introduced some PMTU tests, but they all rely on tunneling, and, particularly, on VTI. These new tests use simple routing to exercise the generation and update of PMTU exceptions in IPv4 and IPv6. Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-08selftests: pmtu: extend MTU parsing helper to locked MTUSabrina Dubroca
The mtu_parse helper introduced in commit f2c929feeccd ("selftests: pmtu: Factor out MTU parsing helper") can only handle "mtu 1234", but not "mtu lock 1234". Extend it, so that we can do IPv4 tests with PMTU smaller than net.ipv4.route.min_pmtu Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-08selftests: pmtu: Introduce check_pmtu_value()Stefano Brivio
Introduce and use a function that checks PMTU values against expected values and logs error messages, to remove some clutter. Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-08bpf: do not blindly change rlimit in reuseport net selftestEric Dumazet
If the current process has unlimited RLIMIT_MEMLOCK, we should should leave it as is. Fixes: 941ff6f11c02 ("bpf: fix rlimit in reuseport net selftest") Signed-off-by: John Sperbeck <jsperbeck@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-10-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
2018-10-05Merge branch 'x86-urgent-for-linus' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Ingo writes: "x86 fixes: Misc fixes: - fix various vDSO bugs: asm constraints and retpolines - add vDSO test units to make sure they never re-appear - fix UV platform TSC initialization bug - fix build warning on Clang" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/vdso: Fix vDSO syscall fallback asm constraint regression x86/cpu/amd: Remove unnecessary parentheses x86/vdso: Only enable vDSO retpolines when enabled and supported x86/tsc: Fix UV TSC initialization x86/platform/uv: Provide is_early_uv_system() selftests/x86: Add clock_gettime() tests to test_vdso x86/vdso: Fix asm constraints on vDSO syscall fallbacks
2018-10-05selftests: net: Clean up an unused variableJakub Sitnicki
Address compiler warning: ip_defrag.c: In function 'send_udp_frags': ip_defrag.c:206:16: warning: unused variable 'udphdr' [-Wunused-variable] struct udphdr udphdr; ^~~~~~ Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-05tc-testing: use a plugin to build eBPF programDavide Caratti
use a TDC plugin, instead of building eBPF programs in the 'setup' stage. '-B' argument can be used to build eBPF programs in $EBPFDIR directory, in the 'pre-suite' stage. Binaries are then cleaned in 'post-suite' stage. Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-05tc-testing: fix build of eBPF programsDavide Caratti
rely on uAPI headers in the current kernel tree, rather than requiring the correct version installed on the test system. While at it, group all sections in a single binary and test the 'section' parameter. Reported-by: Lucas Bates <lucasb@mojatatu.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-05fib_tests: Add tests for invalid metric on routeDavid Ahern
Add ipv4 and ipv6 test cases with an invalid metrics option causing ip_metrics_convert to fail. Tests clean up path during route add. Also, add nodad to to ipv6 address add. When running ipv6_route_metrics directly seeing an occasional failure on the "Using route with mtu metric" test case. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-04fib_tests: Add tests for metrics on routesDavid Ahern
Add ipv4 and ipv6 test cases for metrics (mtu) when fib entries are created. Can be used with kmemleak to see leaks with both fib entries and dst_entry. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-04x86/vdso: Fix vDSO syscall fallback asm constraint regressionAndy Lutomirski
When I added the missing memory outputs, I failed to update the index of the first argument (ebx) on 32-bit builds, which broke the fallbacks. Somehow I must have screwed up my testing or gotten lucky. Add another test to cover gettimeofday() as well. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Fixes: 715bd9d12f84 ("x86/vdso: Fix asm constraints on vDSO syscall fallbacks") Link: http://lkml.kernel.org/r/21bd45ab04b6d838278fa5bebfa9163eceffa13c.1538608971.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-10-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Minor conflict in net/core/rtnetlink.c, David Ahern's bug fix in 'net' overlapped the renaming of a netlink attribute in net-next. Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-04BackMerge v4.19-rc6 into drm-nextDave Airlie
I have some pulls based on rc6, and I prefer to have an explicit backmerge. Signed-off-by: Dave Airlie <airlied@redhat.com>
2018-10-03Merge tag 'linux-kselftest-4.19-rc7' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Shuah writes: "kselftest fixes for 4.19-rc7 This fixes update for 4.19-rc7 consists one fix to rseq test to prevent it from seg-faulting when compiled with -fpie." * tag 'linux-kselftest-4.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: rseq/selftests: fix parametrized test with -fpie
2018-10-03selftests/powerpc: New PTRACE_SYSEMU testBreno Leitao
This patch adds a new test for the new PTRACE_SYSEMU ptrace request. This test also relies on PTRACE_GETREGS and PTRACE_SETREGS requests to run properly, since the trace instruction (gettid() syscall) is being modified at run-time (by PTRACE_SETREGS) and re-executed three times. PTRACE_GETREGS is being used to check that the registers are still sane. This test basically creates a child process that executes syscalls and the parent process check if it is being traced appropriately. The parent process guarantees that the SYSCALLs are being traced, with PTRACE_SYSEMU, and ptrace stops the child application before a syscall is executed. The way the tests validates it, is by guaranteeing that the system calls arguments, as argv[0] (r3) which is the same register that will have the syscall return value on powerpc, are not being corrupted on PTRACE_SYSEMU with a return value, i.e, it continues to have the current arguments instead, meaning that the registers where not clobbered. This test is basically the same test for x86 located at tools/testing/selftests/x86/ptrace_syscall.c, limited to test PTRACE_SYSEMU request, and ported to PowerPC. Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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