August 2025 - Linux-kselftest-mirror

[PATCH 0/2] kselftest/arm64/gcs: Cleanups for basic-gcs.c

by Thomas Weißschuh

Two small cleanups. Signed-off-by: Thomas Weißschuh <linux(a)weissschuh.net> --- Thomas Weißschuh (2): kselftest/arm64/gcs: Correctly check return value when disabling GCS kselftest/arm64/gcs: Use nolibc's getauxval() tools/testing/selftests/arm64/gcs/basic-gcs.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) --- base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 change-id: 20250821-nolibc-gcs-fixes-11cf7585bb74 Best regards, -- Thomas Weißschuh <linux(a)weissschuh.net>

3 weeks

3
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[PATCH] kselftest/arm64: Log error codes in sve-ptrace

by Mark Brown

Use ksft_perror() to report error codes from failing ptrace operations to make it easier to interpret logs when things go wrong. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/arm64/fp/sve-ptrace.c | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/arm64/fp/sve-ptrace.c b/tools/testing/selftests/arm64/fp/sve-ptrace.c index b22303778fb0..4cba3bcff660 100644 --- a/tools/testing/selftests/arm64/fp/sve-ptrace.c +++ b/tools/testing/selftests/arm64/fp/sve-ptrace.c @@ -95,19 +95,27 @@ static int do_child(void) static int get_fpsimd(pid_t pid, struct user_fpsimd_state *fpsimd) { struct iovec iov; + int ret; iov.iov_base = fpsimd; iov.iov_len = sizeof(*fpsimd); - return ptrace(PTRACE_GETREGSET, pid, NT_PRFPREG, &iov); + ret = ptrace(PTRACE_GETREGSET, pid, NT_PRFPREG, &iov); + if (ret == -1) + ksft_perror("ptrace(PTRACE_GETREGSET)"); + return ret; } static int set_fpsimd(pid_t pid, struct user_fpsimd_state *fpsimd) { struct iovec iov; + int ret; iov.iov_base = fpsimd; iov.iov_len = sizeof(*fpsimd); - return ptrace(PTRACE_SETREGSET, pid, NT_PRFPREG, &iov); + ret = ptrace(PTRACE_SETREGSET, pid, NT_PRFPREG, &iov); + if (ret == -1) + ksft_perror("ptrace(PTRACE_SETREGSET)"); + return ret; } static struct user_sve_header *get_sve(pid_t pid, const struct vec_type *type, @@ -117,6 +125,7 @@ static struct user_sve_header *get_sve(pid_t pid, const struct vec_type *type, void *p; size_t sz = sizeof *sve; struct iovec iov; + int ret; while (1) { if (*size < sz) { @@ -132,8 +141,11 @@ static struct user_sve_header *get_sve(pid_t pid, const struct vec_type *type, iov.iov_base = *buf; iov.iov_len = sz; - if (ptrace(PTRACE_GETREGSET, pid, type->regset, &iov)) + ret = ptrace(PTRACE_GETREGSET, pid, type->regset, &iov); + if (ret) { + ksft_perror("ptrace(PTRACE_GETREGSET)"); goto error; + } sve = *buf; if (sve->size <= sz) @@ -152,10 +164,14 @@ static int set_sve(pid_t pid, const struct vec_type *type, const struct user_sve_header *sve) { struct iovec iov; + int ret; iov.iov_base = (void *)sve; iov.iov_len = sve->size; - return ptrace(PTRACE_SETREGSET, pid, type->regset, &iov); + ret = ptrace(PTRACE_SETREGSET, pid, type->regset, &iov); + if (ret == -1) + ksft_perror("ptrace(PTRACE_SETREGSET)"); + return ret; } /* Validate setting and getting the inherit flag */ --- base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 change-id: 20250808-arm64-fp-ptrace-perror-210bb7f93c7c Best regards, -- Mark Brown <broonie(a)kernel.org>

3 weeks

2
1
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[PATCH] selftests/filesystems: Use return value of the function 'chdir()'

by Alessandro Zanni

Fix to use the return value of the function 'chdir("/")' and check if the return is either 0 (ok) or 1 (not ok, so the test stops). The patch fies the solves the following errors: mount-notify_test.c:468:17: warning: ignoring return value of ‘chdir’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 468 | chdir("/"); mount-notify_test_ns.c:489:17: warning: ignoring return value of ‘chdir’ declared with attribute ‘warn_unused_result’ [-Wunused- result] 489 | chdir("/"); To reproduce the issue, use the command: make kselftest TARGET=filesystems/statmount Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- .../selftests/filesystems/mount-notify/mount-notify_test.c | 2 +- .../selftests/filesystems/mount-notify/mount-notify_test_ns.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c index 5a3b0ace1a88..a7f899599d52 100644 --- a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c +++ b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c @@ -458,7 +458,7 @@ TEST_F(fanotify, rmdir) ASSERT_GE(ret, 0); if (ret == 0) { - chdir("/"); + ASSERT_EQ(0, chdir("/")); unshare(CLONE_NEWNS); mount("", "/", NULL, MS_REC|MS_PRIVATE, NULL); umount2("/a", MNT_DETACH); diff --git a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c index d91946e69591..dc9eb3087a1a 100644 --- a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c +++ b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c @@ -486,7 +486,7 @@ TEST_F(fanotify, rmdir) ASSERT_GE(ret, 0); if (ret == 0) { - chdir("/"); + ASSERT_EQ(0, chdir("/")); unshare(CLONE_NEWNS); mount("", "/", NULL, MS_REC|MS_PRIVATE, NULL); umount2("/a", MNT_DETACH); -- 2.43.0

3 weeks

2
1
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[PATCH v3 0/6] ONE_REG interface for SBI FWFT extension

by Anup Patel

This series adds ONE_REG interface for SBI FWFT extension implemented by KVM RISC-V. This was missed out in accepted SBI FWFT patches for KVM RISC-V. These patches can also be found in the riscv_kvm_fwft_one_reg_v3 branch at: https://github.com/avpatel/linux.git Changes since v2: - Re-based on latest KVM RISC-V queue - Improved FWFT ONE_REG interface to allow enabling/disabling each FWFT feature from KVM userspace Changes since v1: - Dropped have_state in PATCH4 as suggested by Drew - Added Drew's Reviewed-by in appropriate patches Anup Patel (6): RISC-V: KVM: Set initial value of hedeleg in kvm_arch_vcpu_create() RISC-V: KVM: Introduce feature specific reset for SBI FWFT RISC-V: KVM: Introduce optional ONE_REG callbacks for SBI extensions RISC-V: KVM: Move copy_sbi_ext_reg_indices() to SBI implementation RISC-V: KVM: Implement ONE_REG interface for SBI FWFT state KVM: riscv: selftests: Add SBI FWFT to get-reg-list test arch/riscv/include/asm/kvm_vcpu_sbi.h | 22 +- arch/riscv/include/asm/kvm_vcpu_sbi_fwft.h | 1 + arch/riscv/include/uapi/asm/kvm.h | 15 ++ arch/riscv/kvm/vcpu.c | 3 +- arch/riscv/kvm/vcpu_onereg.c | 60 +---- arch/riscv/kvm/vcpu_sbi.c | 172 +++++++++++-- arch/riscv/kvm/vcpu_sbi_fwft.c | 227 ++++++++++++++++-- arch/riscv/kvm/vcpu_sbi_sta.c | 63 +++-- .../selftests/kvm/riscv/get-reg-list.c | 32 +++ 9 files changed, 467 insertions(+), 128 deletions(-) -- 2.43.0

3 weeks

3
9
0 0

[PATCH v2 bpf-next] selftests/bpf: Fix the issue where the error code is 0

by Feng Yang

From: Feng Yang <yangfeng(a)kylinos.cn> The error message printed here only uses the previous err value, which results in it being printed as 0. Fix this issue by using libbpf_get_error to retrieve the error. Fix before: run_subtest:FAIL:1019 bpf_map__attach_struct_ops failed for map pro_epilogue: err=0 Fix after: run_subtest:FAIL:1019 bpf_map__attach_struct_ops failed for map pro_epilogue: err=-9 Signed-off-by: Feng Yang <yangfeng(a)kylinos.cn> --- Changes in v2: - Use libbpf_get_error, thanks: Alexei Starovoitov. - Link to v1: https://lore.kernel.org/all/20250828081507.1380218-1-yangfeng59949@163.com/ --- tools/testing/selftests/bpf/test_loader.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/test_loader.c b/tools/testing/selftests/bpf/test_loader.c index 78423cf89e01..b8e102eb0908 100644 --- a/tools/testing/selftests/bpf/test_loader.c +++ b/tools/testing/selftests/bpf/test_loader.c @@ -1082,8 +1082,8 @@ void run_subtest(struct test_loader *tester, } link = bpf_map__attach_struct_ops(map); if (!link) { - PRINT_FAIL("bpf_map__attach_struct_ops failed for map %s: err=%d\n", - bpf_map__name(map), err); + PRINT_FAIL("bpf_map__attach_struct_ops failed for map %s: err=%ld\n", + bpf_map__name(map), libbpf_get_error(link)); goto tobj_cleanup; } links[links_cnt++] = link; -- 2.25.1

3 weeks, 3 days

2
1
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[PATCH v2 bpf-next] selftests/bpf: Fix the invalid operand for instruction issue

by Feng Yang

From: Feng Yang <yangfeng(a)kylinos.cn> The following issue occurs when compiling with clang version 17.0.6: progs/compute_live_registers.c:251:3: error: invalid operand for instruction 251 | "r0 = 1;" | ^ <inline asm>:1:22: note: instantiated into assembly here 1 | r0 = 1;r2 = 2;if r1 & 0x7 goto +1;exit;r0 = r2;exit; | ^ 1 error generated. Use __imm_insn to fix this issue. Fixes: 4a4b84ba9e453 ("selftests/bpf: verify jset handling in CFG computation") Signed-off-by: Feng Yang <yangfeng(a)kylinos.cn> --- Changes in v2: - Use __imm_insn, thanks: Eduard Zingerman. - Link to v1: https://lore.kernel.org/all/20250827031540.461017-1-yangfeng59949@163.com/ --- tools/testing/selftests/bpf/progs/compute_live_registers.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/compute_live_registers.c b/tools/testing/selftests/bpf/progs/compute_live_registers.c index 6884ab99a421..01d73ad76faf 100644 --- a/tools/testing/selftests/bpf/progs/compute_live_registers.c +++ b/tools/testing/selftests/bpf/progs/compute_live_registers.c @@ -249,11 +249,13 @@ __naked void if3_jset_bug(void) asm volatile ( "r0 = 1;" "r2 = 2;" - "if r1 & 0x7 goto +1;" + ".8byte %[jset];" /* same as 'if r1 & 0x7 goto +1;' */ "exit;" "r0 = r2;" "exit;" - ::: __clobber_all); + : + : __imm_insn(jset, BPF_JMP_IMM(BPF_JSET, BPF_REG_1, 0x7, 1)) + : __clobber_all); } SEC("socket") -- 2.43.0

3 weeks, 3 days

2
2
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[PATCH net-next v5 0/9] vsock: add namespace support to vhost-vsock

by Bobby Eshleman

This series adds namespace support to vhost-vsock and loopback. It does not add namespaces to any of the other guest transports (virtio-vsock, hyperv, or vmci). The current revision only supports two modes: local or global. Local mode is complete isolation of namespaces, while global mode is complete sharing between namespaces of CIDs (the original behavior). The mode is set using /proc/sys/net/vsock/ns_mode. Modes are per-netns and write-once. This allows a system to configure namespaces independently (some may share CIDs, others are completely isolated). This also supports future possible mixed use cases, where there may be namespaces in global mode spinning up VMs while there are mixed mode namespaces that provide services to the VMs, but are not allowed to allocate from the global CID pool. Additionally, added tests for the new semantics: tools/testing/selftests/vsock/vmtest.sh 1..22 ok 1 vm_server_host_client ok 2 vm_client_host_server ok 3 vm_loopback ok 4 host_vsock_ns_mode_ok ok 5 host_vsock_ns_mode_write_once_ok ok 6 global_same_cid_fails ok 7 local_same_cid_ok ok 8 global_local_same_cid_ok ok 9 local_global_same_cid_ok ok 10 diff_ns_global_host_connect_to_global_vm_ok ok 11 diff_ns_global_host_connect_to_local_vm_fails ok 12 diff_ns_global_vm_connect_to_global_host_ok ok 13 diff_ns_global_vm_connect_to_local_host_fails ok 14 diff_ns_local_host_connect_to_local_vm_fails ok 15 diff_ns_local_vm_connect_to_local_host_fails ok 16 diff_ns_global_to_local_loopback_local_fails ok 17 diff_ns_local_to_global_loopback_fails ok 18 diff_ns_local_to_local_loopback_fails ok 19 diff_ns_global_to_global_loopback_ok ok 20 same_ns_local_loopback_ok ok 21 same_ns_local_host_connect_to_local_vm_ok ok 22 same_ns_local_vm_connect_to_local_host_ok SUMMARY: PASS=22 SKIP=0 FAIL=0 Log: /tmp/vsock_vmtest_OQC4.log Thanks again for everyone's help and reviews! Signed-off-by: Bobby Eshleman <bobbyeshleman(a)gmail.com> To: Stefano Garzarella <sgarzare(a)redhat.com> To: Shuah Khan <shuah(a)kernel.org> To: David S. Miller <davem(a)davemloft.net> To: Eric Dumazet <edumazet(a)google.com> To: Jakub Kicinski <kuba(a)kernel.org> To: Paolo Abeni <pabeni(a)redhat.com> To: Simon Horman <horms(a)kernel.org> To: Stefan Hajnoczi <stefanha(a)redhat.com> To: Michael S. Tsirkin <mst(a)redhat.com> To: Jason Wang <jasowang(a)redhat.com> To: Xuan Zhuo <xuanzhuo(a)linux.alibaba.com> To: Eugenio Pérez <eperezma(a)redhat.com> To: K. Y. Srinivasan <kys(a)microsoft.com> To: Haiyang Zhang <haiyangz(a)microsoft.com> To: Wei Liu <wei.liu(a)kernel.org> To: Dexuan Cui <decui(a)microsoft.com> To: Bryan Tan <bryan-bt.tan(a)broadcom.com> To: Vishnu Dasa <vishnu.dasa(a)broadcom.com> To: Broadcom internal kernel review list <bcm-kernel-feedback-list(a)broadcom.com> Cc: virtualization(a)lists.linux.dev Cc: netdev(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Cc: kvm(a)vger.kernel.org Cc: linux-hyperv(a)vger.kernel.org Cc: berrange(a)redhat.com Changes in v5: - /proc/net/vsock_ns_mode -> /proc/sys/net/vsock/ns_mode - vsock_global_net -> vsock_global_dummy_net - fix netns lookup in vhost_vsock to respect pid namespaces - add callbacks for vsock_loopback to avoid circular dependency - vmtest.sh loads vsock_loopback module - remove vsock_net_mode_can_set() - change vsock_net_write_mode() to return true/false based on success - make vsock_net_mode enum instead of u8 - Link to v4: https://lore.kernel.org/r/20250805-vsock-vmtest-v4-0-059ec51ab111@meta.com Changes in v4: - removed RFC tag - implemented loopback support - renamed new tests to better reflect behavior - completed suite of tests with permutations of ns modes and vsock_test as guest/host - simplified socat bridging with unix socket instead of tcp + veth - only use vsock_test for success case, socat for failure case (context in commit message) - lots of cleanup Changes in v3: - add notion of "modes" - add procfs /proc/net/vsock_ns_mode - local and global modes only - no /dev/vhost-vsock-netns - vmtest.sh already merged, so new patch just adds new tests for NS - Link to v2: https://lore.kernel.org/kvm/20250312-vsock-netns-v2-0-84bffa1aa97a@gmail.com Changes in v2: - only support vhost-vsock namespaces - all g2h namespaces retain old behavior, only common API changes impacted by vhost-vsock changes - add /dev/vhost-vsock-netns for "opt-in" - leave /dev/vhost-vsock to old behavior - removed netns module param - Link to v1: https://lore.kernel.org/r/20200116172428.311437-1-sgarzare@redhat.com Changes in v1: - added 'netns' module param to vsock.ko to enable the network namespace support (disabled by default) - added 'vsock_net_eq()' to check the "net" assigned to a socket only when 'netns' support is enabled - Link to RFC: https://patchwork.ozlabs.org/cover/1202235/ --- Bobby Eshleman (9): vsock: a per-net vsock NS mode state vsock: add net to vsock skb cb vsock: add netns to vsock core vsock/loopback: add netns support vsock/virtio: add netns to virtio transport common vhost/vsock: add netns support selftests/vsock: improve logging in vmtest.sh selftests/vsock: invoke vsock_test through helpers selftests/vsock: add namespace tests MAINTAINERS | 1 + drivers/vhost/vsock.c | 30 +- include/linux/virtio_vsock.h | 12 + include/net/af_vsock.h | 89 ++- include/net/net_namespace.h | 4 + include/net/netns/vsock.h | 25 + net/vmw_vsock/af_vsock.c | 312 ++++++++- net/vmw_vsock/hyperv_transport.c | 2 +- net/vmw_vsock/virtio_transport.c | 5 +- net/vmw_vsock/virtio_transport_common.c | 14 +- net/vmw_vsock/vmci_transport.c | 4 +- net/vmw_vsock/vsock_loopback.c | 76 ++- tools/testing/selftests/vsock/vmtest.sh | 1092 ++++++++++++++++++++++++++----- 13 files changed, 1475 insertions(+), 191 deletions(-) --- base-commit: 242041164339594ca019481d54b4f68a7aaff64e change-id: 20250325-vsock-vmtest-b3a21d2102c2 Best regards, -- Bobby Eshleman <bobbyeshleman(a)meta.com>

3 weeks, 4 days

3
18
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[PATCH 0/2] Fix va_high_addr_switch.sh test failure

by Chunyu Hu

The two patches fix the va_high_addr_switch.sh test failure on x86_64. Patch 1 fixes the hugepages setup issue that nr_hugepages is reset too early in run_vmtests.sh and break the later va_high_addr_switch testing. Patch 2 fixes the test failure caused by the hint addr align method change in hugetlb_get_unmapped_area(). Chunyu Hu (2): selftests/mm: fix hugepages cleanup too early selftests/mm: fix va_high_addr_switch.sh failure on x86_64 tools/testing/selftests/mm/run_vmtests.sh | 9 +++++++-- tools/testing/selftests/mm/va_high_addr_switch.c | 4 ++-- 2 files changed, 9 insertions(+), 4 deletions(-) -- 2.49.0

3 weeks, 4 days

2
5
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[bpf-next v2 0/5] powerpc64/bpf: Add support for bpf arena and arena atomics

by Saket Kumar Bhaskar

This patch series introduces support for the PROBE_MEM32, bpf_addr_space_cast and PROBE_ATOMIC instructions in the powerpc BPF JIT, facilitating the implementation of BPF arena and arena atomics. The last patch in the series has fix for arena spinlock selftest failure. All selftests related to bpf_arena, bpf_arena_atomic(except load_acquire/store_release) enablement are passing: # ./test_progs -t arena_list #5/1 arena_list/arena_list_1:OK #5/2 arena_list/arena_list_1000:OK #5 arena_list:OK Summary: 1/2 PASSED, 0 SKIPPED, 0 FAILED # ./test_progs -t arena_htab #4/1 arena_htab/arena_htab_llvm:OK #4/2 arena_htab/arena_htab_asm:OK #4 arena_htab:OK Summary: 1/2 PASSED, 0 SKIPPED, 0 FAILED # ./test_progs -t verifier_arena #464/1 verifier_arena/basic_alloc1:OK #464/2 verifier_arena/basic_alloc2:OK #464/3 verifier_arena/basic_alloc3:OK #464/4 verifier_arena/iter_maps1:OK #464/5 verifier_arena/iter_maps2:OK #464/6 verifier_arena/iter_maps3:OK #464 verifier_arena:OK #465/1 verifier_arena_large/big_alloc1:OK #465/2 verifier_arena_large/big_alloc2:OK #465 verifier_arena_large:OK Summary: 2/8 PASSED, 0 SKIPPED, 0 FAILED # ./test_progs -t arena_atomics #3/1 arena_atomics/add:OK #3/2 arena_atomics/sub:OK #3/3 arena_atomics/and:OK #3/4 arena_atomics/or:OK #3/5 arena_atomics/xor:OK #3/6 arena_atomics/cmpxchg:OK #3/7 arena_atomics/xchg:OK #3/8 arena_atomics/uaf:OK #3/9 arena_atomics/load_acquire:SKIP #3/10 arena_atomics/store_release:SKIP #3 arena_atomics:OK (SKIP: 2/10) Summary: 1/8 PASSED, 2 SKIPPED, 0 FAILED All selftests related to arena_spin_lock are passing: # ./test_progs -t arena_spin_lock #6/1 arena_spin_lock/arena_spin_lock_1:OK #6/2 arena_spin_lock/arena_spin_lock_1000:OK #6/3 arena_spin_lock/arena_spin_lock_50000:OK #6 arena_spin_lock:OK Summary: 1/3 PASSED, 0 SKIPPED, 0 FAILED Changes since v1: Addressed comments from Chris: * Squashed introduction of bpf_jit_emit_probe_mem_store() and its usage in one patch. * Defined and used PPC_RAW_RLDICL_DOT to avoid the CMPDI. * Removed conditional statement for fixup[0] = PPC_RAW_LI(dst_reg, 0); * Indicated this change is limited to powerpc64 in subject. Addressed comments from Alexei: * Removed skel->rodata->nr_cpus = get_nprocs() and its usage to get currently online cpus(as it needs to be updated from userspace). Saket Kumar Bhaskar (5): powerpc64/bpf: Implement PROBE_MEM32 pseudo instructions powerpc64/bpf: Implement bpf_addr_space_cast instruction powerpc64/bpf: Introduce bpf_jit_emit_atomic_ops() to emit atomic instructions powerpc64/bpf: Implement PROBE_ATOMIC instructions selftests/bpf: Fix arena_spin_lock selftest failure arch/powerpc/include/asm/ppc-opcode.h | 1 + arch/powerpc/net/bpf_jit.h | 6 +- arch/powerpc/net/bpf_jit_comp.c | 32 +- arch/powerpc/net/bpf_jit_comp32.c | 2 +- arch/powerpc/net/bpf_jit_comp64.c | 401 +++++++++++++----- .../bpf/prog_tests/arena_spin_lock.c | 13 + .../selftests/bpf/progs/arena_spin_lock.c | 5 +- 7 files changed, 347 insertions(+), 113 deletions(-) -- 2.43.5

3 weeks, 4 days

3
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[PATCH 0/8] riscv: add initial support for hardware breakpoints

by Jesse Taube

This patchset adds initial support for hardware breakpoints and watchpoints to the RISC-V architecture. The framework is built on top of perf subsystem and SBI debug trigger extension. Currently following features are not supported and are in works: - icount for single stepping - Virtualization of debug triggers - kernel space debug triggers The SBI debug trigger extension can be found at: https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/src/ext-debug-tr… The Sdtrig ISA is part of RISC-V debug specification which can be found at: https://github.com/riscv/riscv-debug-spec based off the original RFC by Himanshu Chauhan here: https://lore.kernel.org/lkml/20240222125059.13331-1-hchauhan@ventanamicro.c… Second RFC by Jesse Taube here: https://lore.kernel.org/lkml/20250722173829.984082-1-jesse@rivosinc.com/ Himanshu Chauhan (2): riscv: Add SBI debug trigger extension and function ids riscv: Introduce support for hardware break/watchpoints Jesse Taube (6): riscv: Add insn.c, consolidate instruction decoding riscv: insn: Add get_insn_nofault riscv: hw_breakpoint: Use icount for single stepping riscv: ptrace: Add hw breakpoint support riscv: ptrace: Add hw breakpoint regset selftests: riscv: Add test for hardware breakpoints arch/riscv/Kconfig | 2 + arch/riscv/include/asm/bug.h | 12 - arch/riscv/include/asm/hw_breakpoint.h | 59 ++ arch/riscv/include/asm/insn.h | 132 ++- arch/riscv/include/asm/kdebug.h | 3 +- arch/riscv/include/asm/processor.h | 4 + arch/riscv/include/asm/sbi.h | 33 +- arch/riscv/include/uapi/asm/ptrace.h | 9 + arch/riscv/kernel/Makefile | 2 + arch/riscv/kernel/hw_breakpoint.c | 763 ++++++++++++++++++ arch/riscv/kernel/insn.c | 165 ++++ arch/riscv/kernel/kgdb.c | 102 +-- arch/riscv/kernel/probes/kprobes.c | 1 + arch/riscv/kernel/process.c | 4 + arch/riscv/kernel/ptrace.c | 169 ++++ arch/riscv/kernel/traps.c | 11 +- arch/riscv/kernel/traps_misaligned.c | 93 +-- include/uapi/linux/elf.h | 2 + tools/include/uapi/linux/elf.h | 1 + tools/perf/tests/tests.h | 3 +- tools/testing/selftests/riscv/Makefile | 2 +- .../selftests/riscv/breakpoints/.gitignore | 1 + .../selftests/riscv/breakpoints/Makefile | 13 + .../riscv/breakpoints/breakpoint_test.c | 246 ++++++ 24 files changed, 1641 insertions(+), 191 deletions(-) create mode 100644 arch/riscv/include/asm/hw_breakpoint.h create mode 100644 arch/riscv/kernel/hw_breakpoint.c create mode 100644 arch/riscv/kernel/insn.c create mode 100644 tools/testing/selftests/riscv/breakpoints/.gitignore create mode 100644 tools/testing/selftests/riscv/breakpoints/Makefile create mode 100644 tools/testing/selftests/riscv/breakpoints/breakpoint_test.c -- 2.43.0

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Linux-kselftest-mirror August 2025