June 2025 - Linux-kselftest-mirror

[PATCH net] selftests: drv-net: tso: make bkg() wait for socat to quit

by Jakub Kicinski

Commit 846742f7e32f ("selftests: drv-net: add a warning for bkg + shell + terminate") added a warning for bkg() used with terminate=True. The tso test was missed as we didn't have it running anywhere in NIPA. Add exit_wait=True, to avoid: # Warning: combining shell and terminate is risky! # SIGTERM may not reach the child on zsh/ksh! getting printed twice for every variant. Fixes: 0d0f4174f6c8 ("selftests: drv-net: add a simple TSO test") Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- CC: shuah(a)kernel.org CC: willemb(a)google.com CC: linux-kselftest(a)vger.kernel.org --- tools/testing/selftests/drivers/net/hw/tso.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/drivers/net/hw/tso.py b/tools/testing/selftests/drivers/net/hw/tso.py index e1ecb92f79d9..150d6db241a0 100755 --- a/tools/testing/selftests/drivers/net/hw/tso.py +++ b/tools/testing/selftests/drivers/net/hw/tso.py @@ -39,7 +39,7 @@ from lib.py import bkg, cmd, defer, ethtool, ip, rand_port, wait_port_listen port = rand_port() listen_cmd = f"socat -{ipver} -t 2 -u TCP-LISTEN:{port},reuseport /dev/null,ignoreeof" - with bkg(listen_cmd, host=cfg.remote) as nc: + with bkg(listen_cmd, host=cfg.remote, exit_wait=True) as nc: wait_port_listen(port, host=cfg.remote) if ipver == "4": -- 2.49.0

2 weeks, 3 days

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[PATCH net v2] selftests: drv-net: add configs for the TSO test

by Jakub Kicinski

Add missing config options for the tso.py test, specifically to make sure the kernel is built with vxlan and gre tunnels. I noticed this while adding a TSO-capable device QEMU to the CI. Previously we only run virtio tests and it doesn't report LSO stats on the QEMU we have. Fixes: 0d0f4174f6c8 ("selftests: drv-net: add a simple TSO test") Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- v2: - drop NET_IP_TUNNEL v1: https://lore.kernel.org/20250602231640.314556-1-kuba@kernel.org CC: shuah(a)kernel.org CC: willemb(a)google.com CC: linux-kselftest(a)vger.kernel.org --- tools/testing/selftests/drivers/net/hw/config | 5 +++++ 1 file changed, 5 insertions(+) create mode 100644 tools/testing/selftests/drivers/net/hw/config diff --git a/tools/testing/selftests/drivers/net/hw/config b/tools/testing/selftests/drivers/net/hw/config new file mode 100644 index 000000000000..88ae719e6f8f --- /dev/null +++ b/tools/testing/selftests/drivers/net/hw/config @@ -0,0 +1,5 @@ +CONFIG_IPV6=y +CONFIG_IPV6_GRE=y +CONFIG_NET_IPGRE=y +CONFIG_NET_IPGRE_DEMUX=y +CONFIG_VXLAN=y -- 2.49.0

2 weeks, 3 days

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[PATCH net] selftests: drv-net: tso: fix the GRE device name

by Jakub Kicinski

The device type for IPv4 GRE is "gre" not "ipgre", unlike for IPv6 which uses "ip6gre". Not sure how I missed this when writing the test, perhaps because all HW I have access to is on an IPv6-only network. Fixes: 0d0f4174f6c8 ("selftests: drv-net: add a simple TSO test") Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- CC: shuah(a)kernel.org CC: willemb(a)google.com CC: linux-kselftest(a)vger.kernel.org --- tools/testing/selftests/drivers/net/hw/tso.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/drivers/net/hw/tso.py b/tools/testing/selftests/drivers/net/hw/tso.py index 150d6db241a0..3370827409aa 100755 --- a/tools/testing/selftests/drivers/net/hw/tso.py +++ b/tools/testing/selftests/drivers/net/hw/tso.py @@ -216,7 +216,7 @@ from lib.py import bkg, cmd, defer, ethtool, ip, rand_port, wait_port_listen ("", "6", "tx-tcp6-segmentation", None), ("vxlan", "", "tx-udp_tnl-segmentation", ("vxlan", True, "id 100 dstport 4789 noudpcsum")), ("vxlan_csum", "", "tx-udp_tnl-csum-segmentation", ("vxlan", False, "id 100 dstport 4789 udpcsum")), - ("gre", "4", "tx-gre-segmentation", ("ipgre", False, "")), + ("gre", "4", "tx-gre-segmentation", ("gre", False, "")), ("gre", "6", "tx-gre-segmentation", ("ip6gre", False, "")), ) -- 2.49.0

2 weeks, 3 days

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[PATCH bpf-next v1 0/2] bpf,ktls: Fix data corruption caused by using bpf_msg_pop_data() in ktls

by Jiayuan Chen

Cong reported an issue where running 'test_sockmap' in the current bpf-next tree results in an error [1]. The specific test case that triggered the error is a combined test involving ktls and bpf_msg_pop_data(). Root Cause: When sending plaintext data, we initially calculated the corresponding ciphertext length. However, if we later reduced the plaintext data length via socket policy, we failed to recalculate the ciphertext length. This results in transmitting buffers containing uninitialized data during ciphertext transmission. This causes uninitialized bytes to be appended after a complete "Application Data" packet, leading to errors on the receiving end when parsing TLS record. This issue has existed for a long time but was only exposed after the following test code was merged. commit 47eae080410b ("selftests/bpf: Add more tests for test_txmsg_push_pop in test_sockmap") Although we already had tests for pop data before this commit, the pop data length was insufficient (less than 5 bytes). This meant that the corrupted TLS records with data length <5 bytes were cached without being parsed, resulting in no error being triggered. After this fix, all tests pass. 1/ 6 sockmap::txmsg test passthrough:OK 2/ 6 sockmap::txmsg test redirect:OK 3/ 2 sockmap::txmsg test redirect wait send mem:OK 4/ 6 sockmap::txmsg test drop:OK 5/ 6 sockmap::txmsg test ingress redirect:OK 6/ 7 sockmap::txmsg test skb:OK 7/12 sockmap::txmsg test apply:OK 8/12 sockmap::txmsg test cork:OK 9/ 3 sockmap::txmsg test hanging corks:OK 10/11 sockmap::txmsg test push_data:OK 11/17 sockmap::txmsg test pull-data:OK 12/ 9 sockmap::txmsg test pop-data:OK 13/ 6 sockmap::txmsg test push/pop data:OK 14/ 1 sockmap::txmsg test ingress parser:OK 15/ 1 sockmap::txmsg test ingress parser2:OK 16/ 6 sockhash::txmsg test passthrough:OK 17/ 6 sockhash::txmsg test redirect:OK 18/ 2 sockhash::txmsg test redirect wait send mem:OK 19/ 6 sockhash::txmsg test drop:OK 20/ 6 sockhash::txmsg test ingress redirect:OK 21/ 7 sockhash::txmsg test skb:OK 22/12 sockhash::txmsg test apply:OK 23/12 sockhash::txmsg test cork:OK 24/ 3 sockhash::txmsg test hanging corks:OK 25/11 sockhash::txmsg test push_data:OK 26/17 sockhash::txmsg test pull-data:OK 27/ 9 sockhash::txmsg test pop-data:OK 28/ 6 sockhash::txmsg test push/pop data:OK 29/ 1 sockhash::txmsg test ingress parser:OK 30/ 1 sockhash::txmsg test ingress parser2:OK 31/ 6 sockhash:ktls:txmsg test passthrough:OK 32/ 6 sockhash:ktls:txmsg test redirect:OK 33/ 2 sockhash:ktls:txmsg test redirect wait send mem:OK 34/ 6 sockhash:ktls:txmsg test drop:OK 35/ 6 sockhash:ktls:txmsg test ingress redirect:OK 36/ 7 sockhash:ktls:txmsg test skb:OK 37/12 sockhash:ktls:txmsg test apply:OK 38/12 sockhash:ktls:txmsg test cork:OK 39/ 3 sockhash:ktls:txmsg test hanging corks:OK 40/11 sockhash:ktls:txmsg test push_data:OK 41/17 sockhash:ktls:txmsg test pull-data:OK 42/ 9 sockhash:ktls:txmsg test pop-data:OK 43/ 6 sockhash:ktls:txmsg test push/pop data:OK 44/ 1 sockhash:ktls:txmsg test ingress parser:OK 45/ 0 sockhash:ktls:txmsg test ingress parser2:OK Pass: 45 Fail: 0 [1]: https://lore.kernel.org/bpf/CAM_iQpU7=4xjbefZoxndKoX9gFFMOe7FcWMq5tHBsymbrn… Jiayuan Chen (2): bpf,ktls: Fix data corruption when using bpf_msg_pop_data() in ktls selftests/bpf: Add test to cover ktls with bpf_msg_pop_data net/tls/tls_sw.c | 15 +++ .../selftests/bpf/prog_tests/sockmap_ktls.c | 91 +++++++++++++++++++ .../selftests/bpf/progs/test_sockmap_ktls.c | 4 + 3 files changed, 110 insertions(+) -- 2.47.1

2 weeks, 3 days

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[PATCH v2 0/3] KVM: arm64: selftests: arch_timer_edge_cases fixes

by Sebastian Ott

Some small fixes for arch_timer_edge_cases that I stumbled upon while debugging failures for this selftest on ampere-one. Changes since v1: modified patch 3 based on suggestions from Marc. I've done some tests with this on various machines - seems to be all good, however on ampere-one I now hit this in 10% of the runs: ==== Test Assertion Failure ==== arm64/arch_timer_edge_cases.c:481: timer_get_cntct(timer) >= DEF_CNT + (timer_get_cntfrq() * (uint64_t)(delta_2_ms) / 1000) pid=166657 tid=166657 errno=4 - Interrupted system call 1 0x0000000000404db3: test_run at arch_timer_edge_cases.c:933 2 0x0000000000401f9f: main at arch_timer_edge_cases.c:1062 3 0x0000ffffaedd625b: ?? ??:0 4 0x0000ffffaedd633b: ?? ??:0 5 0x00000000004020af: _start at ??:? timer_get_cntct(timer) >= DEF_CNT + msec_to_cycles(delta_2_ms) This is not new, it was just hidden behind the other failure. I'll try to figure out what this is about (seems to be independent of the wait time).. Sebastian Ott (3): KVM: arm64: selftests: fix help text for arch_timer_edge_cases KVM: arm64: selftests: fix thread migration in arch_timer_edge_cases KVM: arm64: selftests: arch_timer_edge_cases - determine effective counter width .../kvm/arm64/arch_timer_edge_cases.c | 37 ++++++++++++------- 1 file changed, 24 insertions(+), 13 deletions(-) base-commit: 0ff41df1cb268fc69e703a08a57ee14ae967d0ca -- 2.49.0

2 weeks, 4 days

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[RFC] selftests/mm: Skip tests dependent on a binary not built

by Khaled Elnaggar

Hello. Running the mm selftests from the kernel's root directory on an x86_64 debian machine using: make defconfig sudo make kselftest TARGETS=mm the tests run normally till we reach one which stalls for 180 seconds and times out according to the following logs: ``` ----------------------------------------------- running ./charge_reserved_hugetlb.sh -cgroup-v2 ----------------------------------------------- CLEANUP DONE CLEANUP DONE Test normal case. private=, populate=, method=0, reserve= nr hugepages = 10 writing cgroup limit: 20971520 writing reseravation limit: 20971520 Starting: hugetlb_usage=0 reserved_usage=0 expect_failure is 0 Putting task in cgroup 'hugetlb_cgroup_test' Method is 0 >>> write_hugetlb_memory.sh: line 22: ./write_to_hugetlbfs: No such file or directory <<< Waiting for hugetlb memory reservation to reach size 10485760. 0 Waiting for hugetlb memory reservation to reach size 10485760. 0 ... Waiting for hugetlb memory reservation to reach size 10485760. 0 Waiting for hugetlb memory reservation to reach size 10485760. 0 not ok 1 selftests: mm: run_vmtests.sh # TIMEOUT 180 seconds make[3]: Leaving directory '/linux/tools/testing/selftests/mm' ``` Logs show that the executable "write_to_hugetlbfs" is missing, causing the test to hang waiting for hugepage reservations. The executable not found means it was not built by the Make system. It is mentioned in Makefile:136-142, and only built if ARCH is 64-bit ``` ifneq (,$(filter $(ARCH),arm64 mips64 parisc64 powerpc riscv64 s390x sparc64 x86_64 s390)) TEST_GEN_FILES += va_high_addr_switch ifneq ($(ARCH),riscv64) TEST_GEN_FILES += virtual_address_range endif TEST_GEN_FILES += write_to_hugetlbfs endif ``` So, for some reason, the top-level Makefile provides ARCH as x86. My proposed solution is similar to existing virtual_address_range check that is to check for the binary, and if it is not found, skip these 2 test cases: charge_reserved_hugetlb.sh and hugetlb_reparenting_test.sh since they directly and indirectly depend on write_to_hugetlbfs binary. This is just a workaround, the root issue of different ARCH detection when running tests from the kernel root directory should still be addressed. I am not sure how to approach it and open for your suggestions. Note that this issue does not happen when ran from selftests/mm using something like sudo make -C tools/testing/selftests/mm because then mm/Makefile's ARCH detection runs correctly (x86_64) Kindly review and share your thoughts. Signed-off-by: Khaled Elnaggar <khaledelnaggarlinux(a)gmail.com> --- tools/testing/selftests/mm/run_vmtests.sh | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index dddd1dd8af14..cdbcfdb62f8a 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -375,8 +375,13 @@ CATEGORY="process_mrelease" run_test ./mrelease_test CATEGORY="mremap" run_test ./mremap_test CATEGORY="hugetlb" run_test ./thuge-gen + +# the following depend on write_to_hugetlbfs binary +if [ -x ./write_to_hugetlbfs ]; then CATEGORY="hugetlb" run_test ./charge_reserved_hugetlb.sh -cgroup-v2 CATEGORY="hugetlb" run_test ./hugetlb_reparenting_test.sh -cgroup-v2 +fi + if $RUN_DESTRUCTIVE; then nr_hugepages_tmp=$(cat /proc/sys/vm/nr_hugepages) enable_soft_offline=$(cat /proc/sys/vm/enable_soft_offline) -- 2.47.2

2 weeks, 4 days

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[PATCH 00/17] ARM64 PMU Partitioning

by Colton Lewis

Overview: This series implements a new PMU scheme on ARM, a partitioned PMU that exists alongside the existing emulated PMU and may be enabled by the kernel command line kvm.reserved_host_counters or by the vcpu ioctl KVM_ARM_PARTITION_PMU. This is a continuation of the RFC posted earlier this year. [1] The high level overview and reason for the name is that this implementation takes advantage of recent CPU features to partition the PMU counters into a host-reserved set and a guest-reserved set. Guests are allowed untrapped hardware access to the most frequently used PMU registers and features for the guest-reserved counters only. This untrapped hardware access significantly reduces the overhead of using performance monitoring capabilities such as the `perf` tool inside a guest VM. Register accesses that aren't trapping to KVM mean less time spent in the host kernel and more time on the workloads guests care about. This optimization especially shines during high `perf` sample rates or large numbers of events that require multiplexing hardware counters. Performance: For example, the following tests were carried out on identical ARM machines with 10 general purpose counters with identical guest images run on QEMU, the only difference being my PMU implementation or the existing one. Some arguments have been simplified here to clarify the purpose of the test: 1) time perf record -e ${FIFTEEN_HW_EVENTS} -F 1000 -- \ gzip -c tmpfs/random.64M.img >/dev/null On emulated PMU this command took 4.143s real time with 0.159s system time. On partitioned PMU this command took 3.139s real time with 0.110s system time, runtime reductions of 24.23% and 30.82%. 2) time perf stat -dd -- \ automated_specint2017.sh On emulated PMU this benchmark completed in 3789.16s real time with 224.45s system time and a final benchmark score of 4.28. On partitioned PMU this benchmark completed in 3525.67s real time with 15.98s system time and a final benchmark score of 4.56. That is a 6.95% reduction in runtime, 92.88% reduction in system time, and 6.54% improvement in overall benchmark score. Seeing these improvements on something as lightweight as perf stat is remarkable and implies there would have been a much greater improvement with perf record. I did not test that because I was not confident it would even finish in a reasonable time on the emulated PMU Test 3 was slightly different, I ran the workload in a VM with a single VCPU pinned to a physical CPU and analyzed from the host where the physical CPU spent its time using mpstat. 3) perf record -e ${FIFTEEN_HW_EVENTS} -F 4000 -- \ stress-ng --cpu 0 --timeout 30 Over a period of 30s the cpu running with the emulated PMU spent 34.96% of the time in the host kernel and 55.85% of the time in the guest. The cpu running the partitioned PMU spent 0.97% of its time in the host kernel and 91.06% of its time in the guest. Taken together, these tests represent a remarkable performance improvement for anything perf related using this new PMU implementation. Caveats: Because the most consistent and performant thing to do was untrap PMCR_EL0, the number of counters visible to the guest via PMCR_EL0.N is always equal to the value KVM sets for MDCR_EL2.HPMN. Previously allowed writes to PMCR_EL0.N via {GET,SET}_ONE_REG no longer affect the guest. These improvements come at a cost to 7-35 new registers that must be swapped at every vcpu_load and vcpu_put if the feature is enabled. I have been informed KVM would like to avoid paying this cost when possible. One solution is to make the trapping changes and context swapping lazy such that the trapping changes and context swapping only take place after the guest has actually accessed the PMU so guests that never access the PMU never pay the cost. This is not done here because it is not crucial to the primary functionality and I thought review would be more productive as soon as I had something complete enough for reviewers to easily play with. However, this or any better ideas are on the table for inclusion in future re-rolls. [1] https://lore.kernel.org/kvmarm/20250213180317.3205285-1-coltonlewis@google.… Colton Lewis (16): arm64: cpufeature: Add cpucap for HPMN0 arm64: Generate sign macro for sysreg Enums arm64: cpufeature: Add cpucap for PMICNTR KVM: arm64: Reorganize PMU functions KVM: arm64: Introduce method to partition the PMU perf: arm_pmuv3: Generalize counter bitmasks perf: arm_pmuv3: Keep out of guest counter partition KVM: arm64: Set up FGT for Partitioned PMU KVM: arm64: Writethrough trapped PMEVTYPER register KVM: arm64: Use physical PMSELR for PMXEVTYPER if partitioned KVM: arm64: Writethrough trapped PMOVS register KVM: arm64: Context switch Partitioned PMU guest registers perf: pmuv3: Handle IRQs for Partitioned PMU guest counters KVM: arm64: Inject recorded guest interrupts KVM: arm64: Add ioctl to partition the PMU when supported KVM: arm64: selftests: Add test case for partitioned PMU Marc Zyngier (1): KVM: arm64: Cleanup PMU includes Documentation/virt/kvm/api.rst | 16 + arch/arm/include/asm/arm_pmuv3.h | 24 + arch/arm64/include/asm/arm_pmuv3.h | 36 +- arch/arm64/include/asm/kvm_host.h | 208 +++++- arch/arm64/include/asm/kvm_pmu.h | 82 +++ arch/arm64/kernel/cpufeature.c | 15 + arch/arm64/kvm/Makefile | 2 +- arch/arm64/kvm/arm.c | 24 +- arch/arm64/kvm/debug.c | 13 +- arch/arm64/kvm/hyp/include/hyp/switch.h | 65 +- arch/arm64/kvm/pmu-emul.c | 629 +---------------- arch/arm64/kvm/pmu-part.c | 358 ++++++++++ arch/arm64/kvm/pmu.c | 630 ++++++++++++++++++ arch/arm64/kvm/sys_regs.c | 54 +- arch/arm64/tools/cpucaps | 2 + arch/arm64/tools/gen-sysreg.awk | 1 + arch/arm64/tools/sysreg | 6 +- drivers/perf/arm_pmuv3.c | 55 +- include/kvm/arm_pmu.h | 199 ------ include/linux/perf/arm_pmu.h | 15 +- include/linux/perf/arm_pmuv3.h | 14 +- include/uapi/linux/kvm.h | 4 + tools/include/uapi/linux/kvm.h | 2 + .../selftests/kvm/arm64/vpmu_counter_access.c | 40 +- virt/kvm/kvm_main.c | 1 + 25 files changed, 1616 insertions(+), 879 deletions(-) create mode 100644 arch/arm64/include/asm/kvm_pmu.h create mode 100644 arch/arm64/kvm/pmu-part.c delete mode 100644 include/kvm/arm_pmu.h base-commit: 1b85d923ba8c9e6afaf19e26708411adde94fba8 -- 2.49.0.1204.g71687c7c1d-goog

2 weeks, 4 days

3
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[PATCH] selftests: cachestat: add tests for mmap and /proc/cpuinfo

by Suresh K C

From: Suresh K C <suresh.k.chandrappa(a)gmail.com> Add a test case to verify cachestat behavior with memory-mapped files using mmap(). This ensures that pages accessed via mmap are correctly accounted for in the page cache. Also add a test for /proc/cpuinfo to validate cachestat's handling of virtual files in pseudo-filesystems. This improves test coverage for edge cases involving non-regular files. Tested on x86_64 with default kernel config. Signed-off-by: Suresh K C <suresh.k.chandrappa(a)gmail.com> --- .../selftests/cachestat/test_cachestat.c | 69 ++++++++++++++++++- 1 file changed, 67 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c index 632ab44737ec..81e7f6dd2279 100644 --- a/tools/testing/selftests/cachestat/test_cachestat.c +++ b/tools/testing/selftests/cachestat/test_cachestat.c @@ -22,7 +22,7 @@ static const char * const dev_files[] = { "/dev/zero", "/dev/null", "/dev/urandom", - "/proc/version", "/proc" + "/proc/version","/proc/cpuinfo","/proc" }; void print_cachestat(struct cachestat *cs) @@ -202,6 +202,65 @@ static int test_cachestat(const char *filename, bool write_random, bool create, return ret; } +bool test_cachestat_mmap(void){ + + size_t PS = sysconf(_SC_PAGESIZE); + size_t filesize = PS * 512 * 2;; + int syscall_ret; + size_t compute_len = PS * 512; + struct cachestat_range cs_range = { PS, compute_len }; + char *filename = "tmpshmcstat"; + unsigned long num_pages = compute_len / PS; + struct cachestat cs; + bool ret = true; + int fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, 0666); + if (fd < 0) { + ksft_print_msg("Unable to create mmap file.\n"); + ret = false; + goto out; + } + if (ftruncate(fd, filesize)) { + ksft_print_msg("Unable to truncate mmap file.\n"); + ret = false; + goto close_fd; + } + if (!write_exactly(fd, filesize)) { + ksft_print_msg("Unable to write to mmap file.\n"); + ret = false; + goto close_fd; + } + char *map = mmap(NULL, filesize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); + if (map == MAP_FAILED) { + ksft_print_msg("mmap failed.\n"); + ret = false; + goto close_fd; + } + + for (int i = 0; i < filesize; i++) { + map[i] = 'A'; + } + map[filesize - 1] = 'X'; + + syscall_ret = syscall(__NR_cachestat, fd, &cs_range, &cs, 0); + + if (syscall_ret) { + ksft_print_msg("Cachestat returned non-zero.\n"); + ret = false; + } else { + print_cachestat(&cs); + if (cs.nr_cache + cs.nr_evicted != num_pages) { + ksft_print_msg("Total number of cached and evicted pages is off.\n"); + ret = false; + } + } + +close_fd: + close(fd); + unlink(filename); +out: + return ret; +} + bool test_cachestat_shmem(void) { size_t PS = sysconf(_SC_PAGESIZE); @@ -274,7 +333,7 @@ int main(void) ret = 1; } - for (int i = 0; i < 5; i++) { + for (int i = 0; i < 6; i++) { const char *dev_filename = dev_files[i]; if (test_cachestat(dev_filename, false, false, false, @@ -315,5 +374,11 @@ int main(void) ret = 1; } + if (test_cachestat_mmap()) + ksft_test_result_pass("cachestat works with a mmap file\n"); + else { + ksft_test_result_fail("cachestat fails with a mmap file\n"); + ret = 1; + } return ret; } -- 2.43.0

2 weeks, 4 days

2
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[PATCH v2] riscv: sbi: Add SBI Debug Triggers Extension tests

by Jesse Taube

Add tests for the DBTR SBI extension. Signed-off-by: Jesse Taube <jesse(a)rivosinc.com> --- V1 -> V2: - Call report_prefix_pop before returning - Disable compressed instructions in exec_call, update related comment - Remove extra "| 1" in dbtr_test_load - Remove extra newlines - Remove extra tabs in check_exec - Remove typedefs from enums - Return when dbtr_install_trigger fails - s/avalible/available/g - s/unistall/uninstall/g --- lib/riscv/asm/sbi.h | 28 ++ lib/riscv/sbi.c | 58 ++++ riscv/Makefile | 1 + riscv/sbi-dbtr.c | 751 ++++++++++++++++++++++++++++++++++++++++++++ riscv/sbi-tests.h | 1 + riscv/sbi.c | 1 + 6 files changed, 840 insertions(+) create mode 100644 riscv/sbi-dbtr.c diff --git a/lib/riscv/asm/sbi.h b/lib/riscv/asm/sbi.h index a5738a5c..ce19ab89 100644 --- a/lib/riscv/asm/sbi.h +++ b/lib/riscv/asm/sbi.h @@ -51,6 +51,7 @@ enum sbi_ext_id { SBI_EXT_SUSP = 0x53555350, SBI_EXT_FWFT = 0x46574654, SBI_EXT_SSE = 0x535345, + SBI_EXT_DBTR = 0x44425452, }; enum sbi_ext_base_fid { @@ -125,6 +126,17 @@ enum sbi_ext_fwft_fid { #define SBI_FWFT_SET_FLAG_LOCK BIT(0) +enum sbi_ext_dbtr_fid { + SBI_EXT_DBTR_NUM_TRIGGERS = 0, + SBI_EXT_DBTR_SETUP_SHMEM, + SBI_EXT_DBTR_TRIGGER_READ, + SBI_EXT_DBTR_TRIGGER_INSTALL, + SBI_EXT_DBTR_TRIGGER_UPDATE, + SBI_EXT_DBTR_TRIGGER_UNINSTALL, + SBI_EXT_DBTR_TRIGGER_ENABLE, + SBI_EXT_DBTR_TRIGGER_DISABLE, +}; + enum sbi_ext_sse_fid { SBI_EXT_SSE_READ_ATTRS = 0, SBI_EXT_SSE_WRITE_ATTRS, @@ -282,6 +294,22 @@ static inline bool sbi_sse_event_is_global(uint32_t event_id) return !!(event_id & SBI_SSE_EVENT_GLOBAL_BIT); } +struct sbiret sbi_debug_num_triggers(unsigned long trig_tdata1); +struct sbiret sbi_debug_set_shmem(void *shmem); +struct sbiret sbi_debug_set_shmem_raw(unsigned long shmem_phys_lo, + unsigned long shmem_phys_hi, + unsigned long flags); +struct sbiret sbi_debug_read_triggers(unsigned long trig_idx_base, + unsigned long trig_count); +struct sbiret sbi_debug_install_triggers(unsigned long trig_count); +struct sbiret sbi_debug_update_triggers(unsigned long trig_count); +struct sbiret sbi_debug_uninstall_triggers(unsigned long trig_idx_base, + unsigned long trig_idx_mask); +struct sbiret sbi_debug_enable_triggers(unsigned long trig_idx_base, + unsigned long trig_idx_mask); +struct sbiret sbi_debug_disable_triggers(unsigned long trig_idx_base, + unsigned long trig_idx_mask); + struct sbiret sbi_sse_read_attrs_raw(unsigned long event_id, unsigned long base_attr_id, unsigned long attr_count, unsigned long phys_lo, unsigned long phys_hi); diff --git a/lib/riscv/sbi.c b/lib/riscv/sbi.c index 2959378f..39c0d3bd 100644 --- a/lib/riscv/sbi.c +++ b/lib/riscv/sbi.c @@ -32,6 +32,64 @@ struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0, return ret; } +struct sbiret sbi_debug_num_triggers(unsigned long trig_tdata1) +{ + return sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_NUM_TRIGGERS, trig_tdata1, 0, 0, 0, 0, 0); +} + +struct sbiret sbi_debug_set_shmem(void *shmem) +{ + phys_addr_t p = virt_to_phys(shmem); + + return sbi_debug_set_shmem_raw(lower_32_bits(p), upper_32_bits(p), 0); +} + +struct sbiret sbi_debug_set_shmem_raw(unsigned long shmem_phys_lo, + unsigned long shmem_phys_hi, + unsigned long flags) +{ + return sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM, shmem_phys_lo, + shmem_phys_hi, flags, 0, 0, 0); +} + +struct sbiret sbi_debug_read_triggers(unsigned long trig_idx_base, + unsigned long trig_count) +{ + return sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIGGER_READ, trig_idx_base, + trig_count, 0, 0, 0, 0); +} + +struct sbiret sbi_debug_install_triggers(unsigned long trig_count) +{ + return sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIGGER_INSTALL, trig_count, 0, 0, 0, 0, 0); +} + +struct sbiret sbi_debug_update_triggers(unsigned long trig_count) +{ + return sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIGGER_UPDATE, trig_count, 0, 0, 0, 0, 0); +} + +struct sbiret sbi_debug_uninstall_triggers(unsigned long trig_idx_base, + unsigned long trig_idx_mask) +{ + return sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIGGER_UNINSTALL, trig_idx_base, + trig_idx_mask, 0, 0, 0, 0); +} + +struct sbiret sbi_debug_enable_triggers(unsigned long trig_idx_base, + unsigned long trig_idx_mask) +{ + return sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIGGER_ENABLE, trig_idx_base, + trig_idx_mask, 0, 0, 0, 0); +} + +struct sbiret sbi_debug_disable_triggers(unsigned long trig_idx_base, + unsigned long trig_idx_mask) +{ + return sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIGGER_DISABLE, trig_idx_base, + trig_idx_mask, 0, 0, 0, 0); +} + struct sbiret sbi_sse_read_attrs_raw(unsigned long event_id, unsigned long base_attr_id, unsigned long attr_count, unsigned long phys_lo, unsigned long phys_hi) diff --git a/riscv/Makefile b/riscv/Makefile index 11e68eae..55c7ac93 100644 --- a/riscv/Makefile +++ b/riscv/Makefile @@ -20,6 +20,7 @@ all: $(tests) $(TEST_DIR)/sbi-deps += $(TEST_DIR)/sbi-asm.o $(TEST_DIR)/sbi-deps += $(TEST_DIR)/sbi-fwft.o $(TEST_DIR)/sbi-deps += $(TEST_DIR)/sbi-sse.o +$(TEST_DIR)/sbi-deps += $(TEST_DIR)/sbi-dbtr.o all_deps += $($(TEST_DIR)/sbi-deps) diff --git a/riscv/sbi-dbtr.c b/riscv/sbi-dbtr.c new file mode 100644 index 00000000..fe323f0f --- /dev/null +++ b/riscv/sbi-dbtr.c @@ -0,0 +1,751 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * SBI DBTR testsuite + * + * Copyright (C) 2025, Rivos Inc., Jesse Taube <jesse(a)rivosinc.com> + */ + +#include <asm/io.h> + +#include "sbi-tests.h" + +#define INSN_LEN(insn) ((((insn) & 0x3) < 0x3) ? 2 : 4) + +#if __riscv_xlen == 64 +#define SBI_DBTR_SHMEM_INVALID_ADDR 0xFFFFFFFFFFFFFFFFUL +#elif __riscv_xlen == 32 +#define SBI_DBTR_SHMEM_INVALID_ADDR 0xFFFFFFFFUL +#else +#error "Unexpected __riscv_xlen" +#endif + +#define RV_MAX_TRIGGERS 32 + +#define SBI_DBTR_TRIG_STATE_MAPPED BIT(0) +#define SBI_DBTR_TRIG_STATE_U BIT(1) +#define SBI_DBTR_TRIG_STATE_S BIT(2) +#define SBI_DBTR_TRIG_STATE_VU BIT(3) +#define SBI_DBTR_TRIG_STATE_VS BIT(4) +#define SBI_DBTR_TRIG_STATE_HAVE_HW_TRIG BIT(5) + +#define SBI_DBTR_TRIG_STATE_HW_TRIG_IDX_SHIFT 8 +#define SBI_DBTR_TRIG_STATE_HW_TRIG_IDX(trig_state) (trig_state >> SBI_DBTR_TRIG_STATE_HW_TRIG_IDX_SHIFT) + +#define SBI_DBTR_TDATA1_TYPE_SHIFT (__riscv_xlen - 4) + +#define SBI_DBTR_TDATA1_MCONTROL6_LOAD_BIT BIT(0) +#define SBI_DBTR_TDATA1_MCONTROL6_STORE_BIT BIT(1) +#define SBI_DBTR_TDATA1_MCONTROL6_EXECUTE_BIT BIT(2) +#define SBI_DBTR_TDATA1_MCONTROL6_U_BIT BIT(3) +#define SBI_DBTR_TDATA1_MCONTROL6_S_BIT BIT(4) +#define SBI_DBTR_TDATA1_MCONTROL6_SELECT_BIT BIT(21) +#define SBI_DBTR_TDATA1_MCONTROL6_VS_BIT BIT(23) +#define SBI_DBTR_TDATA1_MCONTROL6_VU_BIT BIT(24) + +#define SBI_DBTR_TDATA1_MCONTROL_LOAD_BIT BIT(0) +#define SBI_DBTR_TDATA1_MCONTROL_STORE_BIT BIT(1) +#define SBI_DBTR_TDATA1_MCONTROL_EXECUTE_BIT BIT(2) +#define SBI_DBTR_TDATA1_MCONTROL_U_BIT BIT(3) +#define SBI_DBTR_TDATA1_MCONTROL_S_BIT BIT(4) +#define SBI_DBTR_TDATA1_MCONTROL_SELECT_BIT BIT(19) + +enum McontrolType { + SBI_DBTR_TDATA1_TYPE_NONE = (0UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_LEGACY = (1UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_MCONTROL = (2UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_ICOUNT = (3UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_ITRIGGER = (4UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_ETRIGGER = (5UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_MCONTROL6 = (6UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_TMEXTTRIGGER = (7UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_RESERVED0 = (8UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_RESERVED1 = (9UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_RESERVED2 = (10UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_RESERVED3 = (11UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_CUSTOM0 = (12UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_CUSTOM1 = (13UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_CUSTOM2 = (14UL << SBI_DBTR_TDATA1_TYPE_SHIFT), + SBI_DBTR_TDATA1_TYPE_DISABLED = (15UL << SBI_DBTR_TDATA1_TYPE_SHIFT), +}; + +enum Tdata1Value { + VALUE_NONE = 0, + VALUE_LOAD = BIT(0), + VALUE_STORE = BIT(1), + VALUE_EXECUTE = BIT(2), +}; + +enum Tdata1Mode { + MODE_NONE = 0, + MODE_M = BIT(0), + MODE_U = BIT(1), + MODE_S = BIT(2), + MODE_VU = BIT(3), + MODE_VS = BIT(4), +}; + +struct sbi_dbtr_data_msg { + unsigned long tstate; + unsigned long tdata1; + unsigned long tdata2; + unsigned long tdata3; +}; + +struct sbi_dbtr_id_msg { + unsigned long idx; +}; + +/* SBI shared mem messages layout */ +struct sbi_dbtr_shmem_entry { + union { + struct sbi_dbtr_data_msg data; + struct sbi_dbtr_id_msg id; + }; +}; + +static bool dbtr_handled; + +// Expected to be leaf function as not to disrupt frame-pointer +static __attribute__((naked)) void exec_call(void) +{ + // skip over nop when triggered instead of ret. + asm volatile (".option push\n" + ".option arch, -c\n" + "nop\n" + "ret\n" + ".option pop\n"); +} + +static void dbtr_exception_handler(struct pt_regs *regs) +{ + dbtr_handled = true; + + /* Reading *epc may cause a fault, skip over nop */ + if ((void *)regs->epc == exec_call) { + regs->epc += 4; + return; + } + + /* WARNING: Skips over the trapped intruction */ + regs->epc += INSN_LEN(readw((void *)regs->epc)); +} + +static bool do_save(void *tdata2) +{ + bool ret; + + writel(0, tdata2); + + ret = dbtr_handled; + dbtr_handled = false; + + return ret; +} + +static bool do_load(void *tdata2) +{ + bool ret; + + readl(tdata2); + + ret = dbtr_handled; + dbtr_handled = false; + + return ret; +} + +static bool do_exec(void) +{ + bool ret; + + exec_call(); + + ret = dbtr_handled; + dbtr_handled = false; + + return ret; +} + +static unsigned long gen_tdata1_mcontrol(enum Tdata1Mode mode, enum Tdata1Value value) +{ + unsigned long tdata1 = SBI_DBTR_TDATA1_TYPE_MCONTROL; + + if (value & VALUE_LOAD) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL_LOAD_BIT; + + if (value & VALUE_STORE) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL_STORE_BIT; + + if (value & VALUE_EXECUTE) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL_EXECUTE_BIT; + + if (mode & MODE_M) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL_U_BIT; + + if (mode & MODE_U) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL_U_BIT; + + if (mode & MODE_S) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL_S_BIT; + + return tdata1; +} + +static unsigned long gen_tdata1_mcontrol6(enum Tdata1Mode mode, enum Tdata1Value value) +{ + unsigned long tdata1 = SBI_DBTR_TDATA1_TYPE_MCONTROL6; + + if (value & VALUE_LOAD) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL6_LOAD_BIT; + + if (value & VALUE_STORE) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL6_STORE_BIT; + + if (value & VALUE_EXECUTE) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL6_EXECUTE_BIT; + + if (mode & MODE_M) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL6_U_BIT; + + if (mode & MODE_U) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL6_U_BIT; + + if (mode & MODE_S) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL6_S_BIT; + + if (mode & MODE_VU) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL6_VU_BIT; + + if (mode & MODE_VS) + tdata1 |= SBI_DBTR_TDATA1_MCONTROL6_VS_BIT; + + return tdata1; +} + +static unsigned long gen_tdata1(enum McontrolType type, enum Tdata1Value value, enum Tdata1Mode mode) +{ + switch (type) { + case SBI_DBTR_TDATA1_TYPE_MCONTROL: + return gen_tdata1_mcontrol(mode, value); + case SBI_DBTR_TDATA1_TYPE_MCONTROL6: + return gen_tdata1_mcontrol6(mode, value); + default: + return 0; + } +} + +static bool dbtr_install_trigger(struct sbi_dbtr_shmem_entry *shmem, void *tdata2, + unsigned long tdata1) +{ + struct sbiret sbi_ret; + bool ret; + + shmem->data.tdata1 = tdata1; + shmem->data.tdata2 = (unsigned long)tdata2; + + sbi_ret = sbi_debug_install_triggers(1); + ret = sbiret_report_error(&sbi_ret, SBI_SUCCESS, "sbi_debug_install_triggers"); + if (ret) + install_exception_handler(EXC_BREAKPOINT, dbtr_exception_handler); + + return ret; +} + +static bool dbtr_uninstall_trigger(void) +{ + struct sbiret ret; + + install_exception_handler(EXC_BREAKPOINT, NULL); + + ret = sbi_debug_uninstall_triggers(0, 1); + return sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_uninstall_triggers"); +} + +static unsigned long dbtr_test_num_triggers(void) +{ + struct sbiret ret; + //sbi_debug_num_triggers will return trig_max in sbiret.value when trig_tdata1 == 0 + unsigned long tdata1 = 0; + + // should be atleast one trigger. + ret = sbi_debug_num_triggers(tdata1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_num_triggers"); + + if (ret.value == 0) + report_fail("sbi_debug_num_triggers: Returned 0 triggers available"); + else + report_pass("sbi_debug_num_triggers: Returned %lu triggers available", ret.value); + + return ret.value; +} + +static enum McontrolType dbtr_test_type(unsigned long *num_trig) +{ + struct sbiret ret; + + //sbi_debug_num_triggers will return trig_max in sbiret.value when trig_tdata1 == 0 + unsigned long tdata1 = SBI_DBTR_TDATA1_TYPE_MCONTROL6; + + ret = sbi_debug_num_triggers(tdata1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_num_triggers"); + if (ret.value > 0) { + report_pass("sbi_debug_num_triggers: Returned %lu mcontrol6 triggers available", + ret.value); + *num_trig = ret.value; + return tdata1; + } + + tdata1 = SBI_DBTR_TDATA1_TYPE_MCONTROL; + + ret = sbi_debug_num_triggers(tdata1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_num_triggers"); + *num_trig = ret.value; + if (ret.value > 0) { + report_pass("sbi_debug_num_triggers: Returned %lu mcontrol triggers available", + ret.value); + return tdata1; + } + + report_fail("sbi_debug_num_triggers: Returned 0 mcontrol(6) triggers available"); + + return SBI_DBTR_TDATA1_TYPE_NONE; +} + +static struct sbiret dbtr_test_save_install_uninstall(struct sbi_dbtr_shmem_entry *shmem, + enum McontrolType type) +{ + static unsigned long test; + struct sbiret ret; + + report_prefix_push("save_trigger"); + + shmem->data.tdata1 = gen_tdata1(type, VALUE_STORE, MODE_S | MODE_S); + shmem->data.tdata2 = (unsigned long)&test; + + ret = sbi_debug_install_triggers(1); + if (!sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_install_triggers")) { + report_prefix_pop(); + return ret; + } + + install_exception_handler(EXC_BREAKPOINT, dbtr_exception_handler); + + report(do_save(&test), "triggered"); + + if (do_load(&test)) + report_fail("triggered by load"); + + ret = sbi_debug_uninstall_triggers(0, 1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_uninstall_triggers"); + + if (do_save(&test)) + report_fail("triggered after uninstall"); + + install_exception_handler(EXC_BREAKPOINT, NULL); + report_prefix_pop(); + + return ret; +} + +static void dbtr_test_update(struct sbi_dbtr_shmem_entry *shmem, enum McontrolType type) +{ + static unsigned long test; + struct sbiret ret; + + report_prefix_push("update_trigger"); + + if (!dbtr_install_trigger(shmem, NULL, gen_tdata1(type, VALUE_NONE, MODE_NONE))) { + report_prefix_pop(); + return; + } + + shmem->id.idx = 0; + shmem->data.tdata1 = gen_tdata1(type, VALUE_STORE, MODE_S); + shmem->data.tdata2 = (unsigned long)&test; + + ret = sbi_debug_update_triggers(1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_update_triggers"); + + report(do_save(&test), "triggered"); + + dbtr_uninstall_trigger(); + report_prefix_pop(); +} + +static void dbtr_test_load(struct sbi_dbtr_shmem_entry *shmem, enum McontrolType type) +{ + static unsigned long test; + + report_prefix_push("load_trigger"); + if (!dbtr_install_trigger(shmem, &test, gen_tdata1(type, VALUE_LOAD, MODE_S))) { + report_prefix_pop(); + return; + } + + report(do_load(&test), "triggered"); + + if (do_save(&test)) + report_fail("triggered by save"); + + dbtr_uninstall_trigger(); + report_prefix_pop(); +} + +static void dbtr_test_disable_enable(struct sbi_dbtr_shmem_entry *shmem, enum McontrolType type) +{ + static unsigned long test; + struct sbiret ret; + + report_prefix_push("sbi_debug_disable_triggers"); + if (!dbtr_install_trigger(shmem, &test, gen_tdata1(type, VALUE_STORE, MODE_S))) { + report_prefix_pop(); + return; + } + + ret = sbi_debug_disable_triggers(0, 1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_disable_triggers"); + + if (do_save(&test)) { + report_fail("should not trigger"); + + dbtr_uninstall_trigger(); + report_prefix_pop(); + report_skip("sbi_debug_enable_triggers: no disable"); + + return; + } + + report_pass("should not trigger"); + + report_prefix_pop(); + report_prefix_push("sbi_debug_enable_triggers"); + + ret = sbi_debug_enable_triggers(0, 1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_enable_triggers"); + + report(do_save(&test), "triggered"); + + dbtr_uninstall_trigger(); + report_prefix_pop(); +} + +static void dbtr_test_exec(struct sbi_dbtr_shmem_entry *shmem, enum McontrolType type) +{ + static unsigned long test; + + report_prefix_push("exec_trigger"); + /* check if loads and saves trigger exec */ + if (!dbtr_install_trigger(shmem, &test, gen_tdata1(type, VALUE_EXECUTE, MODE_S))) { + report_prefix_pop(); + return; + } + + if (do_load(&test)) + report_fail("triggered by load"); + + if (do_save(&test)) + report_fail("triggered by save"); + + dbtr_uninstall_trigger(); + + /* Check if exec works */ + if (!dbtr_install_trigger(shmem, exec_call, gen_tdata1(type, VALUE_EXECUTE, MODE_S))) { + report_prefix_pop(); + return; + } + report(do_exec(), "exec trigger"); + + dbtr_uninstall_trigger(); + report_prefix_pop(); +} + +static void dbtr_test_read(struct sbi_dbtr_shmem_entry *shmem, enum McontrolType type) +{ + const unsigned long tstatus_expected = SBI_DBTR_TRIG_STATE_S | SBI_DBTR_TRIG_STATE_MAPPED; + const unsigned long tdata1 = gen_tdata1(type, VALUE_STORE, MODE_S); + static unsigned long test; + struct sbiret ret; + + report_prefix_push("sbi_debug_read_triggers"); + if (!dbtr_install_trigger(shmem, &test, tdata1)) { + report_prefix_pop(); + return; + } + + ret = sbi_debug_read_triggers(0, 1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_read_triggers"); + + report(shmem->data.tdata1 == tdata1, "tdata1 expected: 0x%016lx, found: 0x%016lx", + tdata1, shmem->data.tdata1); + report(shmem->data.tdata2 == ((unsigned long)&test), + "tdata2 expected: 0x%016lx, found: 0x%016lx", ((unsigned long)&test), + shmem->data.tdata2); + report(shmem->data.tstate == tstatus_expected, "tstate expected: 0x%016lx, found: 0x%016lx", + tstatus_expected, shmem->data.tstate); + + dbtr_uninstall_trigger(); + report_prefix_pop(); +} + +static void check_exec(unsigned long base) +{ + struct sbiret ret; + + report(do_exec(), "exec triggered"); + + ret = sbi_debug_uninstall_triggers(base, 1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_uninstall_triggers"); +} + +static void dbtr_test_multiple(struct sbi_dbtr_shmem_entry *shmem, enum McontrolType type, + unsigned long num_trigs) +{ + static unsigned long test[2]; + struct sbiret ret; + bool have_three = num_trigs > 2; + + if (num_trigs < 2) + return; + + report_prefix_push("test_multiple"); + + if (!dbtr_install_trigger(shmem, &test[0], gen_tdata1(type, VALUE_STORE, MODE_S))) { + report_prefix_pop(); + return; + } + if (!dbtr_install_trigger(shmem, &test[1], gen_tdata1(type, VALUE_LOAD, MODE_S))) + goto error; + if (have_three && + !dbtr_install_trigger(shmem, exec_call, gen_tdata1(type, VALUE_EXECUTE, MODE_S))) { + ret = sbi_debug_uninstall_triggers(1, 1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_uninstall_triggers"); + goto error; + } + + report(do_save(&test[0]), "save triggered"); + + if (do_load(&test[0])) + report_fail("save triggered by load"); + + report(do_load(&test[1]), "load triggered"); + + if (do_save(&test[1])) + report_fail("load triggered by save"); + + if (have_three) + check_exec(2); + + ret = sbi_debug_uninstall_triggers(1, 1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_uninstall_triggers"); + + if (do_load(&test[1])) + report_fail("load triggered after uninstall"); + + report(do_save(&test[0]), "save triggered"); + + if (!have_three && + dbtr_install_trigger(shmem, exec_call, gen_tdata1(type, VALUE_EXECUTE, MODE_S))) + check_exec(1); + +error: + ret = sbi_debug_uninstall_triggers(0, 1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_uninstall_triggers"); + + install_exception_handler(EXC_BREAKPOINT, NULL); + report_prefix_pop(); +} + +static void dbtr_test_multiple_types(struct sbi_dbtr_shmem_entry *shmem, unsigned long type) +{ + static unsigned long test; + + report_prefix_push("dbtr_test_multiple_types"); + + /* check if loads and saves trigger exec */ + if (!dbtr_install_trigger(shmem, &test, + gen_tdata1(type, VALUE_EXECUTE | VALUE_LOAD | VALUE_STORE, MODE_S))) { + report_prefix_pop(); + return; + } + + report(do_load(&test), "load trigger"); + + report(do_save(&test), "save trigger"); + + dbtr_uninstall_trigger(); + + /* Check if exec works */ + if (!dbtr_install_trigger(shmem, exec_call, + gen_tdata1(type, VALUE_EXECUTE | VALUE_LOAD | VALUE_STORE, MODE_S))) { + report_prefix_pop(); + return; + } + + report(do_exec(), "exec trigger"); + + dbtr_uninstall_trigger(); + report_prefix_pop(); +} + +static void dbtr_test_disable_uninstall(struct sbi_dbtr_shmem_entry *shmem, enum McontrolType type) +{ + static unsigned long test; + struct sbiret ret; + + report_prefix_push("disable uninstall"); + if (!dbtr_install_trigger(shmem, &test, gen_tdata1(type, VALUE_STORE, MODE_S))) { + report_prefix_pop(); + return; + } + + ret = sbi_debug_disable_triggers(0, 1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_disable_triggers"); + + dbtr_uninstall_trigger(); + + if (!dbtr_install_trigger(shmem, &test, gen_tdata1(type, VALUE_STORE, MODE_S))) { + report_prefix_pop(); + return; + } + + report(do_save(&test), "triggered"); + + dbtr_uninstall_trigger(); + report_prefix_pop(); +} + +static void dbtr_test_uninstall_enable(struct sbi_dbtr_shmem_entry *shmem, enum McontrolType type) +{ + static unsigned long test; + struct sbiret ret; + + report_prefix_push("uninstall enable"); + if (!dbtr_install_trigger(shmem, &test, gen_tdata1(type, VALUE_STORE, MODE_S))) { + report_prefix_pop(); + return; + } + dbtr_uninstall_trigger(); + + ret = sbi_debug_enable_triggers(0, 1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_enable_triggers"); + + install_exception_handler(EXC_BREAKPOINT, dbtr_exception_handler); + + report(!do_save(&test), "should not trigger"); + + install_exception_handler(EXC_BREAKPOINT, NULL); + report_prefix_pop(); +} + +static void dbtr_test_uninstall_update(struct sbi_dbtr_shmem_entry *shmem, enum McontrolType type) +{ + static unsigned long test; + struct sbiret ret; + + report_prefix_push("uninstall update"); + if (!dbtr_install_trigger(shmem, NULL, gen_tdata1(type, VALUE_NONE, MODE_NONE))) { + report_prefix_pop(); + return; + } + + dbtr_uninstall_trigger(); + + shmem->id.idx = 0; + shmem->data.tdata1 = gen_tdata1(type, VALUE_STORE, MODE_S); + shmem->data.tdata2 = (unsigned long)&test; + + ret = sbi_debug_update_triggers(1); + sbiret_report_error(&ret, SBI_ERR_FAILURE, "sbi_debug_update_triggers"); + + install_exception_handler(EXC_BREAKPOINT, dbtr_exception_handler); + + report(!do_save(&test), "should not trigger"); + + install_exception_handler(EXC_BREAKPOINT, NULL); + report_prefix_pop(); +} + +static void dbtr_test_disable_read(struct sbi_dbtr_shmem_entry *shmem, enum McontrolType type) +{ + const unsigned long tstatus_expected = SBI_DBTR_TRIG_STATE_S | SBI_DBTR_TRIG_STATE_MAPPED; + const unsigned long tdata1 = gen_tdata1(type, VALUE_STORE, MODE_NONE); + static unsigned long test; + struct sbiret ret; + + report_prefix_push("disable_read"); + if (!dbtr_install_trigger(shmem, &test, gen_tdata1(type, VALUE_STORE, MODE_S))) { + report_prefix_pop(); + return; + } + + ret = sbi_debug_disable_triggers(0, 1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_disable_triggers"); + + ret = sbi_debug_read_triggers(0, 1); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_read_triggers"); + + report(shmem->data.tdata1 == tdata1, "tdata1 expected: 0x%016lx, found: 0x%016lx", + tdata1, shmem->data.tdata1); + report(shmem->data.tdata2 == ((unsigned long)&test), + "tdata2 expected: 0x%016lx, found: 0x%016lx", + ((unsigned long)&test), shmem->data.tdata2); + report(shmem->data.tstate == tstatus_expected, "tstate expected: 0x%016lx, found: 0x%016lx", + tstatus_expected, shmem->data.tstate); + + dbtr_uninstall_trigger(); + report_prefix_pop(); +} + +void check_dbtr(void) +{ + static struct sbi_dbtr_shmem_entry shmem[RV_MAX_TRIGGERS] = {}; + unsigned long num_trigs; + enum McontrolType trig_type; + struct sbiret ret; + + report_prefix_push("dbtr"); + + if (!sbi_probe(SBI_EXT_DBTR)) { + report_skip("extension not available"); + report_prefix_pop(); + return; + } + + if (__sbi_get_imp_id() == SBI_IMPL_OPENSBI && + __sbi_get_imp_version() < sbi_impl_opensbi_mk_version(1, 6)) { + report_skip("OpenSBI < v1.7 detected, skipping tests"); + report_prefix_pop(); + return; + } + + num_trigs = dbtr_test_num_triggers(); + if (!num_trigs) + goto error; + + trig_type = dbtr_test_type(&num_trigs); + if (trig_type == SBI_DBTR_TDATA1_TYPE_NONE) + goto error; + + ret = sbi_debug_set_shmem(shmem); + sbiret_report_error(&ret, SBI_SUCCESS, "sbi_debug_set_shmem"); + + ret = dbtr_test_save_install_uninstall(&shmem[0], trig_type); + /* install or uninstall failed */ + if (ret.error != SBI_SUCCESS) + goto error; + + dbtr_test_load(&shmem[0], trig_type); + dbtr_test_exec(&shmem[0], trig_type); + dbtr_test_read(&shmem[0], trig_type); + dbtr_test_disable_enable(&shmem[0], trig_type); + dbtr_test_update(&shmem[0], trig_type); + dbtr_test_multiple_types(&shmem[0], trig_type); + dbtr_test_multiple(shmem, trig_type, num_trigs); + dbtr_test_disable_uninstall(&shmem[0], trig_type); + dbtr_test_uninstall_enable(&shmem[0], trig_type); + dbtr_test_uninstall_update(&shmem[0], trig_type); + dbtr_test_disable_read(&shmem[0], trig_type); + +error: + report_prefix_pop(); +} diff --git a/riscv/sbi-tests.h b/riscv/sbi-tests.h index d5c4ae70..6a227745 100644 --- a/riscv/sbi-tests.h +++ b/riscv/sbi-tests.h @@ -99,6 +99,7 @@ static inline bool env_enabled(const char *env) void sbi_bad_fid(int ext); void check_sse(void); +void check_dbtr(void); #endif /* __ASSEMBLER__ */ #endif /* _RISCV_SBI_TESTS_H_ */ diff --git a/riscv/sbi.c b/riscv/sbi.c index edb1a6be..5bd496d0 100644 --- a/riscv/sbi.c +++ b/riscv/sbi.c @@ -1561,6 +1561,7 @@ int main(int argc, char **argv) check_susp(); check_sse(); check_fwft(); + check_dbtr(); return report_summary(); } -- 2.43.0

2 weeks, 4 days

2
1
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[RFC Patch 0/2] selftests/mm: assert rmap behave as expected

by Wei Yang

As David suggested, currently we don't have a high level test case to verify the behavior of rmap. This patch set introduce the verification on rmap by migration. Patch 1 is a preparation to move ksm related operation into vm_util. Patch 2 is the new test case. Currently it covers following four scenarios: * anonymous page * shmem page * pagecache page * ksm page Wei Yang (2): selftests/mm: put general ksm operation into vm_util selftests/mm: assert rmap behave as expected MAINTAINERS | 1 + tools/testing/selftests/mm/.gitignore | 1 + tools/testing/selftests/mm/Makefile | 3 + .../selftests/mm/ksm_functional_tests.c | 76 +-- tools/testing/selftests/mm/rmap.c | 466 ++++++++++++++++++ tools/testing/selftests/mm/run_vmtests.sh | 4 + tools/testing/selftests/mm/vm_util.c | 71 +++ tools/testing/selftests/mm/vm_util.h | 7 + 8 files changed, 563 insertions(+), 66 deletions(-) create mode 100644 tools/testing/selftests/mm/rmap.c -- 2.34.1

2 weeks, 5 days

1
3
0 0

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Linux-kselftest-mirror June 2025