- Linux-kselftest-mirror - lists.linaro.org

[PATCH 1/2] selftests/pid_namespace: fix building with clang-20

by Dmitry Antipov

When using 'make LLVM=1 W=1 -C tools/testing/selftests/pid_namespace' with clang-20, I've noticed the following: pid_max.c:42:8: error: call to undeclared function 'mount'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 42 | ret = mount("", "/", NULL, MS_PRIVATE | MS_REC, 0); | ^ pid_max.c:42:29: error: use of undeclared identifier 'MS_PRIVATE' 42 | ret = mount("", "/", NULL, MS_PRIVATE | MS_REC, 0); | ^ ... So include '<sys/mount.h>' to add all of the required declarations. Signed-off-by: Dmitry Antipov <dmantipov(a)yandex.ru> --- tools/testing/selftests/pid_namespace/pid_max.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/pid_namespace/pid_max.c b/tools/testing/selftests/pid_namespace/pid_max.c index 51c414faabb0..972bedc475f1 100644 --- a/tools/testing/selftests/pid_namespace/pid_max.c +++ b/tools/testing/selftests/pid_namespace/pid_max.c @@ -11,6 +11,7 @@ #include <string.h> #include <syscall.h> #include <sys/wait.h> +#include <sys/mount.h> #include "../kselftest_harness.h" #include "../pidfd/pidfd.h" -- 2.48.1

5 months, 4 weeks

2
2
0 0

[PATCH v4 iproute2-next 0/1] DualPI2 iproute2 patch

by chia-yu.chang＠nokia-bell-labs.com

From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com> Hello, Please find DUALPI2 iproute2 patch v4. v4 - Add min_qlen_step to dualpi2 attribute as the minimum queue length in number of packets in the L-queue to start step amrking. v3 - Add memlimit to dualpi2 attribute, and add memory_used, max_memory_used, memory_limit in dualpi2 stats (Dave Taht <dave.taht(a)gmail.com>) - Update manual to align latest implementation and clarify the queue naming and default unit - Use common "get_scaled_alpha_beta" and clean print_opt for Dualpi2 v2 - Rename get_float in dualpi2 to get_float_min_max in utils.c - Move get_float from iplink_can.c in utils.c (Stephen Hemminger <stephen(a)networkplumber.org>) - Add print function for JSON of dualpi2 (Stephen Hemminger <stephen(a)networkplumber.org>) For more details of DualPI2, plesae refer IETF RFC9332 (https://datatracker.ietf.org/doc/html/rfc9332). Best Regards, Chia-Yu Chia-Yu Chang (1): tc: add dualpi2 scheduler module bash-completion/tc | 11 +- include/uapi/linux/pkt_sched.h | 39 +++ include/utils.h | 2 + ip/iplink_can.c | 14 - lib/utils.c | 30 ++ man/man8/tc-dualpi2.8 | 249 ++++++++++++++++ tc/Makefile | 1 + tc/q_dualpi2.c | 508 +++++++++++++++++++++++++++++++++ 8 files changed, 839 insertions(+), 15 deletions(-) create mode 100644 man/man8/tc-dualpi2.8 create mode 100644 tc/q_dualpi2.c -- 2.34.1

5 months, 4 weeks

3
7
0 0

[PATCH 0/2] selftests: livepatch: test if ftrace can trace a livepatched function

by Filipe Xavier

This patchset add ftrace helpers functions and add a new test makes sure that ftrace can trace a function that was introduced by a livepatch. Signed-off-by: Filipe Xavier <felipeaggger(a)gmail.com> --- Filipe Xavier (2): selftests: livepatch: add new ftrace helpers functions selftests: livepatch: test if ftrace can trace a livepatched function tools/testing/selftests/livepatch/functions.sh | 45 ++++++++++++++++++++++++ tools/testing/selftests/livepatch/test-ftrace.sh | 35 ++++++++++++++++++ 2 files changed, 80 insertions(+) --- base-commit: 848e076317446f9c663771ddec142d7c2eb4cb43 change-id: 20250306-ftrace-sftest-livepatch-60d9dc472235 Best regards, -- Filipe Xavier <felipeaggger(a)gmail.com>

5 months, 4 weeks

3
7
0 0

[PATCH] tools/nolibc: Add support for SPARC

by Thomas Weißschuh

Add support for 32bit and 64bit SPARC to nolibc. Signed-off-by: Thomas Weißschuh <linux(a)weissschuh.net> --- This is only tested on QEMU. Any tests on real hardware would be very welcome. --- tools/include/nolibc/arch-sparc.h | 191 ++++++++++++++++++++++++++++ tools/include/nolibc/arch.h | 2 + tools/testing/selftests/nolibc/Makefile | 11 ++ tools/testing/selftests/nolibc/run-tests.sh | 2 + 4 files changed, 206 insertions(+) diff --git a/tools/include/nolibc/arch-sparc.h b/tools/include/nolibc/arch-sparc.h new file mode 100644 index 0000000000000000000000000000000000000000..cb5543eca87bb4d52cfba4c0668e35cbbf6dd124 --- /dev/null +++ b/tools/include/nolibc/arch-sparc.h @@ -0,0 +1,191 @@ +/* SPDX-License-Identifier: LGPL-2.1 OR MIT */ +/* + * SPARC (32bit and 64bit) specific definitions for NOLIBC + * Copyright (C) 2025 Thomas Weißschuh <linux(a)weissschuh.net> + */ + +#ifndef _NOLIBC_ARCH_SPARC_H +#define _NOLIBC_ARCH_SPARC_H + +#include <linux/unistd.h> + +#include "compiler.h" +#include "crt.h" + +/* + * Syscalls for SPARC: + * - registers are native word size + * - syscall number is passed in g1 + * - arguments are in o0-o5 + * - the system call is performed by calling a trap instruction + * - syscall return value is in 0a + * - syscall error flag is in the carry bit of the processor status register + */ + +#ifdef __arch64__ + +#define _NOLIBC_SYSCALL "t 0x6d\n" \ + "bcs,a %%xcc, 1f\n" \ + "sub %%g0, %%o0, %%o0\n" \ + "1:\n" + +#else + +#define _NOLIBC_SYSCALL "t 0x10\n" \ + "bcs,a 1f\n" \ + "sub %%g0, %%o0, %%o0\n" \ + "1:\n" + +#endif /* __arch64__ */ + +#define my_syscall0(num) \ +({ \ + register long _num __asm__ ("g1") = (num); \ + register long _arg1 __asm__ ("o0"); \ + \ + __asm__ volatile ( \ + _NOLIBC_SYSCALL \ + : "+r"(_arg1) \ + : "r"(_num) \ + : "memory", "cc" \ + ); \ + _arg1; \ +}) + +#define my_syscall1(num, arg1) \ +({ \ + register long _num __asm__ ("g1") = (num); \ + register long _arg1 __asm__ ("o0") = (long)(arg1); \ + \ + __asm__ volatile ( \ + _NOLIBC_SYSCALL \ + : "+r"(_arg1) \ + : "r"(_num) \ + : "memory", "cc" \ + ); \ + _arg1; \ +}) + +#define my_syscall2(num, arg1, arg2) \ +({ \ + register long _num __asm__ ("g1") = (num); \ + register long _arg1 __asm__ ("o0") = (long)(arg1); \ + register long _arg2 __asm__ ("o1") = (long)(arg2); \ + \ + __asm__ volatile ( \ + _NOLIBC_SYSCALL \ + : "+r"(_arg1) \ + : "r"(_arg2), "r"(_num) \ + : "memory", "cc" \ + ); \ + _arg1; \ +}) + +#define my_syscall3(num, arg1, arg2, arg3) \ +({ \ + register long _num __asm__ ("g1") = (num); \ + register long _arg1 __asm__ ("o0") = (long)(arg1); \ + register long _arg2 __asm__ ("o1") = (long)(arg2); \ + register long _arg3 __asm__ ("o2") = (long)(arg3); \ + \ + __asm__ volatile ( \ + _NOLIBC_SYSCALL \ + : "+r"(_arg1) \ + : "r"(_arg2), "r"(_arg3), "r"(_num) \ + : "memory", "cc" \ + ); \ + _arg1; \ +}) + +#define my_syscall4(num, arg1, arg2, arg3, arg4) \ +({ \ + register long _num __asm__ ("g1") = (num); \ + register long _arg1 __asm__ ("o0") = (long)(arg1); \ + register long _arg2 __asm__ ("o1") = (long)(arg2); \ + register long _arg3 __asm__ ("o2") = (long)(arg3); \ + register long _arg4 __asm__ ("o3") = (long)(arg4); \ + \ + __asm__ volatile ( \ + _NOLIBC_SYSCALL \ + : "+r"(_arg1) \ + : "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_num) \ + : "memory", "cc" \ + ); \ + _arg1; \ +}) + +#define my_syscall5(num, arg1, arg2, arg3, arg4, arg5) \ +({ \ + register long _num __asm__ ("g1") = (num); \ + register long _arg1 __asm__ ("o0") = (long)(arg1); \ + register long _arg2 __asm__ ("o1") = (long)(arg2); \ + register long _arg3 __asm__ ("o2") = (long)(arg3); \ + register long _arg4 __asm__ ("o3") = (long)(arg4); \ + register long _arg5 __asm__ ("o4") = (long)(arg5); \ + \ + __asm__ volatile ( \ + _NOLIBC_SYSCALL \ + : "+r"(_arg1) \ + : "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), "r"(_num) \ + : "memory", "cc" \ + ); \ + _arg1; \ +}) + +#define my_syscall6(num, arg1, arg2, arg3, arg4, arg5, arg6) \ +({ \ + register long _num __asm__ ("g1") = (num); \ + register long _arg1 __asm__ ("o0") = (long)(arg1); \ + register long _arg2 __asm__ ("o1") = (long)(arg2); \ + register long _arg3 __asm__ ("o2") = (long)(arg3); \ + register long _arg4 __asm__ ("o3") = (long)(arg4); \ + register long _arg5 __asm__ ("o4") = (long)(arg5); \ + register long _arg6 __asm__ ("o5") = (long)(arg6); \ + \ + __asm__ volatile ( \ + _NOLIBC_SYSCALL \ + : "+r"(_arg1) \ + : "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), "r"(_arg6), \ + "r"(_num) \ + : "memory", "cc" \ + ); \ + _arg1; \ +}) + +/* startup code */ +void __attribute__((weak, noreturn)) __nolibc_entrypoint __no_stack_protector _start(void) +{ + __asm__ volatile ( + /* + * Save stack pointer to o0, as arg1 of _start_c. + * Account for window save area and stack bias. + */ +#ifdef __arch64__ + "add %sp, 128 + 2047, %o0\n" +#else + "add %sp, 64, %o0\n" +#endif + "b,a _start_c\n" /* transfer to c runtime */ + ); + __nolibc_entrypoint_epilogue(); +} + +static pid_t getpid(void); + +static __attribute__((unused)) +pid_t sys_fork(void) +{ + pid_t parent, ret; + + parent = getpid(); + ret = my_syscall0(__NR_fork); + + /* The syscall returns the parent pid in the child instead of 0 */ + if (ret == parent) + return 0; + else + return ret; +} +#define sys_fork sys_fork + +#endif /* _NOLIBC_ARCH_SPARC_H */ diff --git a/tools/include/nolibc/arch.h b/tools/include/nolibc/arch.h index 8a2c143c0fba288147e5a7bf9db38ffb08367616..b8c1da9a88d1593d5a97f60909ede5d0c17699eb 100644 --- a/tools/include/nolibc/arch.h +++ b/tools/include/nolibc/arch.h @@ -33,6 +33,8 @@ #include "arch-s390.h" #elif defined(__loongarch__) #include "arch-loongarch.h" +#elif defined(__sparc__) +#include "arch-sparc.h" #else #error Unsupported Architecture #endif diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile index 58bcbbd029bc3ad9ccac968191b703ccf5df0717..5060e189dc842d761dd13d70b8afdb2ff3390bc5 100644 --- a/tools/testing/selftests/nolibc/Makefile +++ b/tools/testing/selftests/nolibc/Makefile @@ -56,6 +56,8 @@ ARCH_mips32be = mips ARCH_riscv32 = riscv ARCH_riscv64 = riscv ARCH_s390x = s390 +ARCH_sparc32 = sparc +ARCH_sparc64 = sparc ARCH := $(or $(ARCH_$(XARCH)),$(XARCH)) # kernel image names by architecture @@ -76,6 +78,8 @@ IMAGE_riscv64 = arch/riscv/boot/Image IMAGE_s390x = arch/s390/boot/bzImage IMAGE_s390 = arch/s390/boot/bzImage IMAGE_loongarch = arch/loongarch/boot/vmlinuz.efi +IMAGE_sparc32 = arch/sparc/boot/image +IMAGE_sparc64 = arch/sparc/boot/image IMAGE = $(objtree)/$(IMAGE_$(XARCH)) IMAGE_NAME = $(notdir $(IMAGE)) @@ -97,6 +101,8 @@ DEFCONFIG_riscv64 = defconfig DEFCONFIG_s390x = defconfig DEFCONFIG_s390 = defconfig compat.config DEFCONFIG_loongarch = defconfig +DEFCONFIG_sparc32 = sparc32_defconfig +DEFCONFIG_sparc64 = sparc64_defconfig DEFCONFIG = $(DEFCONFIG_$(XARCH)) EXTRACONFIG = $(EXTRACONFIG_$(XARCH)) @@ -122,6 +128,8 @@ QEMU_ARCH_riscv64 = riscv64 QEMU_ARCH_s390x = s390x QEMU_ARCH_s390 = s390x QEMU_ARCH_loongarch = loongarch64 +QEMU_ARCH_sparc32 = sparc +QEMU_ARCH_sparc64 = sparc64 QEMU_ARCH = $(QEMU_ARCH_$(XARCH)) QEMU_ARCH_USER_ppc64le = ppc64le @@ -152,6 +160,8 @@ QEMU_ARGS_riscv64 = -M virt -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_T QEMU_ARGS_s390x = -M s390-ccw-virtio -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)" QEMU_ARGS_s390 = -M s390-ccw-virtio -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)" QEMU_ARGS_loongarch = -M virt -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)" +QEMU_ARGS_sparc32 = -M SS-5 -m 256M -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)" +QEMU_ARGS_sparc64 = -M sun4u -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)" QEMU_ARGS = -m 1G $(QEMU_ARGS_$(XARCH)) $(QEMU_ARGS_BIOS) $(QEMU_ARGS_EXTRA) # OUTPUT is only set when run from the main makefile, otherwise @@ -174,6 +184,7 @@ CFLAGS_s390x = -m64 CFLAGS_s390 = -m31 CFLAGS_mips32le = -EL -mabi=32 -fPIC CFLAGS_mips32be = -EB -mabi=32 +CFLAGS_sparc32 = $(call cc-option,-m32) CFLAGS_STACKPROTECTOR ?= $(call cc-option,-mstack-protector-guard=global $(call cc-option,-fstack-protector-all)) CFLAGS ?= -Os -fno-ident -fno-asynchronous-unwind-tables -std=c89 -W -Wall -Wextra \ $(call cc-option,-fno-stack-protector) $(call cc-option,-Wmissing-prototypes) \ diff --git a/tools/testing/selftests/nolibc/run-tests.sh b/tools/testing/selftests/nolibc/run-tests.sh index 0299a0912d4049dd12217f9835b81d231e1d2bfd..040956a9f5b8dda3e78abc0d4b6073f4fcd9e3ee 100755 --- a/tools/testing/selftests/nolibc/run-tests.sh +++ b/tools/testing/selftests/nolibc/run-tests.sh @@ -25,6 +25,7 @@ all_archs=( riscv32 riscv64 s390x s390 loongarch + sparc32 sparc64 ) archs="${all_archs[@]}" @@ -111,6 +112,7 @@ crosstool_arch() { loongarch) echo loongarch64;; mips*) echo mips;; s390*) echo s390;; + sparc*) echo sparc64;; *) echo "$1";; esac } --- base-commit: bceb73904c855c78402dca94c82915f078f259dd change-id: 20250226-nolibc-sparc-abf4775dc813 Best regards, -- Thomas Weißschuh <linux(a)weissschuh.net>

5 months, 4 weeks

3
5
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[PATCH v9 00/14] iommufd: Add vIOMMU infrastructure (Part-3: vEVENTQ)

by Nicolin Chen

As the vIOMMU infrastructure series part-3, this introduces a new vEVENTQ object. The existing FAULT object provides a nice notification pathway to the user space with a queue already, so let vEVENTQ reuse that. Mimicing the HWPT structure, add a common EVENTQ structure to support its derivatives: IOMMUFD_OBJ_FAULT (existing) and IOMMUFD_OBJ_VEVENTQ (new). An IOMMUFD_CMD_VEVENTQ_ALLOC is introduced to allocate vEVENTQ object for vIOMMUs. One vIOMMU can have multiple vEVENTQs in different types but can not support multiple vEVENTQs in the same type. The forwarding part is fairly simple but might need to replace a physical device ID with a virtual device ID in a driver-level event data structure. So, this also adds some helpers for drivers to use. As usual, this series comes with the selftest coverage for this new ioctl and with a real world use case in the ARM SMMUv3 driver. This is on Github: https://github.com/nicolinc/iommufd/commits/iommufd_veventq-v9 Paring QEMU branch for testing: https://github.com/nicolinc/qemu/commits/wip/for_iommufd_veventq-v9 Changelog v9 * Add Acked-by from Will * Fix typo in commit logs and reviewer name * Allow invaid nested STE for C_BAD_STE report * Drop extra indentation in arm_smmu_handle_event() * Drop comments in arm_smmu_attach_prepare_vmaster() v8 https://lore.kernel.org/all/cover.1740504232.git.nicolinc@nvidia.com/ * Add Reviewed-by from Jason and Pranjal * Fix errno returned in arm_smmu_handle_event() * Validate domain->type outside of arm_smmu_attach_prepare_vmaster() * Drop unnecessary vmaster comparison in arm_smmu_attach_commit_vmaster() v7 https://lore.kernel.org/all/cover.1740238876.git.nicolinc@nvidia.com/ * Rebase on Jason's for-next tree for latest fault.c * Add Reviewed-by * Update commit logs * Add __reserved field sanity * Skip kfree() on the static header * Replace "bool on_list" with list_is_last() * Use u32 for flags in iommufd_vevent_header * Drop casting in iommufd_viommu_get_vdev_id() * Update the bounding logic to veventq->sequence * Add missing cpu_to_le64() around STRTAB_STE_1_MEV * Reuse veventq->common.lock to fence sequence and num_events * Rename overflow to lost_events and log it in upon kmalloc failure * Correct the error handling part in iommufd_veventq_deliver_fetch() * Add an arm_smmu_clear_vmaster() to simplify identity/blocked domain attach ops * Add additional four event records to forward to user space VM, and update the uAPI doc * Reuse the existing smmu->streams_mutex lock to fence master->vmaster pointer, instead of adding a new rwsem v6 https://lore.kernel.org/all/cover.1737754129.git.nicolinc@nvidia.com/ * Drop supports_veventq viommu op * Split bug/cosmetics fixes out of the series * Drop the blocking mutex around copy_to_user() * Add veventq_depth in uAPI to limit vEVENTQ size * Revise the documentation for a clear description * Fix sparse warnings in arm_vmaster_report_event() * Rework iommufd_viommu_get_vdev_id() to return -ENOENT v.s. 0 * Allow Abort/Bypass STEs to allocate vEVENTQ and set STE.MEV for DoS mitigations v5 https://lore.kernel.org/all/cover.1736237481.git.nicolinc@nvidia.com/ * Add Reviewed-by from Baolu * Reorder the OBJ list as well * Fix alphabetical order after renaming in v4 * Add supports_veventq viommu op for vEVENTQ type validation v4 https://lore.kernel.org/all/cover.1735933254.git.nicolinc@nvidia.com/ * Rename "vIRQ" to "vEVENTQ" * Use flexible array in struct iommufd_vevent * Add the new ioctl command to union ucmd_buffer * Fix the alphabetical order in union ucmd_buffer too * Rename _TYPE_NONE to _TYPE_DEFAULT aligning with vIOMMU naming v3 https://lore.kernel.org/all/cover.1734477608.git.nicolinc@nvidia.com/ * Rebase on Will's for-joerg/arm-smmu/updates for arm_smmu_event series * Add "Reviewed-by" lines from Kevin * Fix typos in comments, kdocs, and jump tags * Add a patch to sort struct iommufd_ioctl_op * Update iommufd's userpsace-api documentation * Update uAPI kdoc to quote SMMUv3 offical spec * Drop the unused workqueue in struct iommufd_virq * Drop might_sleep() in iommufd_viommu_report_irq() helper * Add missing "break" in iommufd_viommu_get_vdev_id() helper * Shrink the scope of the vmaster's read lock in SMMUv3 driver * Pass in two arguments to iommufd_eventq_virq_handler() helper * Move "!ops || !ops->read" validation into iommufd_eventq_init() * Move "fault->ictx = ictx" closer to iommufd_ctx_get(fault->ictx) * Update commit message for arm_smmu_attach_prepare/commit_vmaster() * Keep "iommufd_fault" as-is and rename "iommufd_eventq_virq" to just "iommufd_virq" v2 https://lore.kernel.org/all/cover.1733263737.git.nicolinc@nvidia.com/ * Rebase on v6.13-rc1 * Add IOPF and vIRQ in iommufd.rst (userspace-api) * Add a proper locking in iommufd_event_virq_destroy * Add iommufd_event_virq_abort with a lockdep_assert_held * Rename "EVENT_*" to "EVENTQ_*" to describe the objects better * Reorganize flows in iommufd_eventq_virq_alloc for abort() to work * Adde struct arm_smmu_vmaster to store vSID upon attaching to a nested domain, calling a newly added iommufd_viommu_get_vdev_id helper * Adde an arm_vmaster_report_event helper in arm-smmu-v3-iommufd file to simplify the routine in arm_smmu_handle_evt() of the main driver v1 https://lore.kernel.org/all/cover.1724777091.git.nicolinc@nvidia.com/ Thanks! Nicolin Nicolin Chen (14): iommufd/fault: Move two fault functions out of the header iommufd/fault: Add an iommufd_fault_init() helper iommufd: Abstract an iommufd_eventq from iommufd_fault iommufd: Rename fault.c to eventq.c iommufd: Add IOMMUFD_OBJ_VEVENTQ and IOMMUFD_CMD_VEVENTQ_ALLOC iommufd/viommu: Add iommufd_viommu_get_vdev_id helper iommufd/viommu: Add iommufd_viommu_report_event helper iommufd/selftest: Require vdev_id when attaching to a nested domain iommufd/selftest: Add IOMMU_TEST_OP_TRIGGER_VEVENT for vEVENTQ coverage iommufd/selftest: Add IOMMU_VEVENTQ_ALLOC test coverage Documentation: userspace-api: iommufd: Update FAULT and VEVENTQ iommu/arm-smmu-v3: Introduce struct arm_smmu_vmaster iommu/arm-smmu-v3: Report events that belong to devices attached to vIOMMU iommu/arm-smmu-v3: Set MEV bit in nested STE for DoS mitigations drivers/iommu/iommufd/Makefile | 2 +- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 36 ++ drivers/iommu/iommufd/iommufd_private.h | 135 +++- drivers/iommu/iommufd/iommufd_test.h | 10 + include/linux/iommufd.h | 23 + include/uapi/linux/iommufd.h | 105 +++ tools/testing/selftests/iommu/iommufd_utils.h | 115 ++++ .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 60 ++ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 80 ++- drivers/iommu/iommufd/driver.c | 72 +++ drivers/iommu/iommufd/eventq.c | 597 ++++++++++++++++++ drivers/iommu/iommufd/fault.c | 342 ---------- drivers/iommu/iommufd/hw_pagetable.c | 6 +- drivers/iommu/iommufd/main.c | 7 + drivers/iommu/iommufd/selftest.c | 54 ++ drivers/iommu/iommufd/viommu.c | 2 + tools/testing/selftests/iommu/iommufd.c | 36 ++ .../selftests/iommu/iommufd_fail_nth.c | 7 + Documentation/userspace-api/iommufd.rst | 17 + 19 files changed, 1298 insertions(+), 408 deletions(-) create mode 100644 drivers/iommu/iommufd/eventq.c delete mode 100644 drivers/iommu/iommufd/fault.c base-commit: a05df03a88bc1088be8e9d958f208d6484691e43 -- 2.43.0

6 months

2
15
0 0

[PATCH] selftests/bpf: Replace deprecated strncpy() with strscpy()

by feng.wei8＠zte.com.cn

From: FengWei <feng.wei8(a)zte.com.cn> strncpy() is deprecated for NUL-terminated destination buffers. Use strscpy() instead and remove the manual NUL-termination. Signed-off-by: FengWei <feng.wei8(a)zte.com.cn> --- tools/testing/selftests/bpf/test_verifier.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c index 447b68509d76..dfe64c6d4f87 100644 --- a/tools/testing/selftests/bpf/test_verifier.c +++ b/tools/testing/selftests/bpf/test_verifier.c @@ -1320,8 +1320,7 @@ static bool cmp_str_seq(const char *log, const char *exp) printf("FAIL\nTestcase bug\n"); return false; } - strncpy(needle, exp, len); - needle[len] = 0; + strscpy(needle, exp, len); q = strstr(log, needle); if (!q) { printf("FAIL\nUnexpected verifier log!\n" -- 2.25.1

6 months

2
1
0 0

[PATCH AUTOSEL 6.12 12/13] selftests: netfilter: skip br_netfilter queue tests if kernel is tainted

by Sasha Levin

From: Florian Westphal <fw(a)strlen.de> [ Upstream commit c21b02fd9cbf15aed6e32c89e0fd70070281e3d1 ] These scripts fail if the kernel is tainted which leads to wrong test failure reports in CI environments when an unrelated test triggers some splat. Check taint state at start of script and SKIP if its already dodgy. Signed-off-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/netfilter/br_netfilter.sh | 7 +++++++ .../testing/selftests/net/netfilter/br_netfilter_queue.sh | 7 +++++++ tools/testing/selftests/net/netfilter/nft_queue.sh | 1 + 3 files changed, 15 insertions(+) diff --git a/tools/testing/selftests/net/netfilter/br_netfilter.sh b/tools/testing/selftests/net/netfilter/br_netfilter.sh index c28379a965d83..1559ba275105e 100755 --- a/tools/testing/selftests/net/netfilter/br_netfilter.sh +++ b/tools/testing/selftests/net/netfilter/br_netfilter.sh @@ -13,6 +13,12 @@ source lib.sh checktool "nft --version" "run test without nft tool" +read t < /proc/sys/kernel/tainted +if [ "$t" -ne 0 ];then + echo SKIP: kernel is tainted + exit $ksft_skip +fi + cleanup() { cleanup_all_ns } @@ -165,6 +171,7 @@ if [ "$t" -eq 0 ];then echo PASS: kernel not tainted else echo ERROR: kernel is tainted + dmesg ret=1 fi diff --git a/tools/testing/selftests/net/netfilter/br_netfilter_queue.sh b/tools/testing/selftests/net/netfilter/br_netfilter_queue.sh index 6a764d70ab06f..4788641717d93 100755 --- a/tools/testing/selftests/net/netfilter/br_netfilter_queue.sh +++ b/tools/testing/selftests/net/netfilter/br_netfilter_queue.sh @@ -4,6 +4,12 @@ source lib.sh checktool "nft --version" "run test without nft tool" +read t < /proc/sys/kernel/tainted +if [ "$t" -ne 0 ];then + echo SKIP: kernel is tainted + exit $ksft_skip +fi + cleanup() { cleanup_all_ns } @@ -72,6 +78,7 @@ if [ "$t" -eq 0 ];then echo PASS: kernel not tainted else echo ERROR: kernel is tainted + dmesg exit 1 fi diff --git a/tools/testing/selftests/net/netfilter/nft_queue.sh b/tools/testing/selftests/net/netfilter/nft_queue.sh index a9d109fcc15c2..00fe1a6c1f30c 100755 --- a/tools/testing/selftests/net/netfilter/nft_queue.sh +++ b/tools/testing/selftests/net/netfilter/nft_queue.sh @@ -593,6 +593,7 @@ EOF echo "PASS: queue program exiting while packets queued" else echo "TAINT: queue program exiting while packets queued" + dmesg ret=1 fi } -- 2.39.5

6 months

1
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[PATCH AUTOSEL 6.13 15/16] selftests: netfilter: skip br_netfilter queue tests if kernel is tainted

by Sasha Levin

From: Florian Westphal <fw(a)strlen.de> [ Upstream commit c21b02fd9cbf15aed6e32c89e0fd70070281e3d1 ] These scripts fail if the kernel is tainted which leads to wrong test failure reports in CI environments when an unrelated test triggers some splat. Check taint state at start of script and SKIP if its already dodgy. Signed-off-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/netfilter/br_netfilter.sh | 7 +++++++ .../testing/selftests/net/netfilter/br_netfilter_queue.sh | 7 +++++++ tools/testing/selftests/net/netfilter/nft_queue.sh | 1 + 3 files changed, 15 insertions(+) diff --git a/tools/testing/selftests/net/netfilter/br_netfilter.sh b/tools/testing/selftests/net/netfilter/br_netfilter.sh index c28379a965d83..1559ba275105e 100755 --- a/tools/testing/selftests/net/netfilter/br_netfilter.sh +++ b/tools/testing/selftests/net/netfilter/br_netfilter.sh @@ -13,6 +13,12 @@ source lib.sh checktool "nft --version" "run test without nft tool" +read t < /proc/sys/kernel/tainted +if [ "$t" -ne 0 ];then + echo SKIP: kernel is tainted + exit $ksft_skip +fi + cleanup() { cleanup_all_ns } @@ -165,6 +171,7 @@ if [ "$t" -eq 0 ];then echo PASS: kernel not tainted else echo ERROR: kernel is tainted + dmesg ret=1 fi diff --git a/tools/testing/selftests/net/netfilter/br_netfilter_queue.sh b/tools/testing/selftests/net/netfilter/br_netfilter_queue.sh index 6a764d70ab06f..4788641717d93 100755 --- a/tools/testing/selftests/net/netfilter/br_netfilter_queue.sh +++ b/tools/testing/selftests/net/netfilter/br_netfilter_queue.sh @@ -4,6 +4,12 @@ source lib.sh checktool "nft --version" "run test without nft tool" +read t < /proc/sys/kernel/tainted +if [ "$t" -ne 0 ];then + echo SKIP: kernel is tainted + exit $ksft_skip +fi + cleanup() { cleanup_all_ns } @@ -72,6 +78,7 @@ if [ "$t" -eq 0 ];then echo PASS: kernel not tainted else echo ERROR: kernel is tainted + dmesg exit 1 fi diff --git a/tools/testing/selftests/net/netfilter/nft_queue.sh b/tools/testing/selftests/net/netfilter/nft_queue.sh index 785e3875a6da4..784d1b46912b0 100755 --- a/tools/testing/selftests/net/netfilter/nft_queue.sh +++ b/tools/testing/selftests/net/netfilter/nft_queue.sh @@ -593,6 +593,7 @@ EOF echo "PASS: queue program exiting while packets queued" else echo "TAINT: queue program exiting while packets queued" + dmesg ret=1 fi } -- 2.39.5

6 months

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[PATCH v9 0/4] rust: replace kernel::str::CStr w/ core::ffi::CStr

by Tamir Duberstein

This picks up from Michal Rostecki's work[0]. Per Michal's guidance I have omitted Co-authored tags, as the end result is quite different. Link: https://lore.kernel.org/rust-for-linux/20240819153656.28807-2-vadorovsky@pr… [0] Closes: https://github.com/Rust-for-Linux/linux/issues/1075 Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- Changes in v9: - Rebase on rust-next. - Restore `impl Display for BStr` which exists upstream[1]. - Link: https://doc.rust-lang.org/nightly/std/bstr/struct.ByteStr.html#impl-Display… [1] - Link to v8: https://lore.kernel.org/r/20250203-cstr-core-v8-0-cb3f26e78686@gmail.com Changes in v8: - Move `{from,as}_char_ptr` back to `CStrExt`. This reduces the diff some. - Restore `from_bytes_with_nul_unchecked_mut`, `to_cstring`. - Link to v7: https://lore.kernel.org/r/20250202-cstr-core-v7-0-da1802520438@gmail.com Changes in v7: - Rebased on mainline. - Restore functionality added in commit a321f3ad0a5d ("rust: str: add {make,to}_{upper,lower}case() to CString"). - Used `diff.algorithm patience` to improve diff readability. - Link to v6: https://lore.kernel.org/r/20250202-cstr-core-v6-0-8469cd6d29fd@gmail.com Changes in v6: - Split the work into several commits for ease of review. - Restore `{from,as}_char_ptr` to allow building on ARM (see commit message). - Add `CStrExt` to `kernel::prelude`. (Alice Ryhl) - Remove `CStrExt::from_bytes_with_nul_unchecked_mut` and restore `DerefMut for CString`. (Alice Ryhl) - Rename and hide `kernel::c_str!` to encourage use of C-String literals. - Drop implementation and invocation changes in kunit.rs. (Trevor Gross) - Drop docs on `Display` impl. (Trevor Gross) - Rewrite docs in the style of the standard library. - Restore the `test_cstr_debug` unit tests to demonstrate that the implementation has changed. Changes in v5: - Keep the `test_cstr_display*` unit tests. Changes in v4: - Provide the `CStrExt` trait with `display()` method, which returns a `CStrDisplay` wrapper with `Display` implementation. This addresses the lack of `Display` implementation for `core::ffi::CStr`. - Provide `from_bytes_with_nul_unchecked_mut()` method in `CStrExt`, which might be useful and is going to prevent manual, unsafe casts. - Fix a typo (s/preffered/prefered/). Changes in v3: - Fix the commit message. - Remove redundant braces in `use`, when only one item is imported. Changes in v2: - Do not remove `c_str` macro. While it's preferred to use C-string literals, there are two cases where `c_str` is helpful: - When working with macros, which already return a Rust string literal (e.g. `stringify!`). - When building macros, where we want to take a Rust string literal as an argument (for caller's convenience), but still use it as a C-string internally. - Use Rust literals as arguments in macros (`new_mutex`, `new_condvar`, `new_mutex`). Use the `c_str` macro to convert these literals to C-string literals. - Use `c_str` in kunit.rs for converting the output of `stringify!` to a `CStr`. - Remove `DerefMut` implementation for `CString`. --- Tamir Duberstein (4): rust: move `CStr`'s `Display` to helper struct rust: replace `CStr` with `core::ffi::CStr` rust: replace `kernel::c_str!` with C-Strings rust: remove core::ffi::CStr reexport drivers/gpu/drm/drm_panic_qr.rs | 6 +- drivers/net/phy/ax88796b_rust.rs | 8 +- drivers/net/phy/qt2025.rs | 6 +- rust/kernel/device.rs | 7 +- rust/kernel/devres.rs | 2 +- rust/kernel/driver.rs | 4 +- rust/kernel/error.rs | 10 +- rust/kernel/faux.rs | 5 +- rust/kernel/firmware.rs | 8 +- rust/kernel/kunit.rs | 18 +- rust/kernel/lib.rs | 2 +- rust/kernel/miscdevice.rs | 5 +- rust/kernel/net/phy.rs | 12 +- rust/kernel/of.rs | 5 +- rust/kernel/pci.rs | 3 +- rust/kernel/platform.rs | 7 +- rust/kernel/prelude.rs | 2 +- rust/kernel/seq_file.rs | 4 +- rust/kernel/str.rs | 499 +++++++++++++---------------------- rust/kernel/sync.rs | 4 +- rust/kernel/sync/condvar.rs | 3 +- rust/kernel/sync/lock.rs | 4 +- rust/kernel/sync/lock/global.rs | 6 +- rust/kernel/sync/poll.rs | 1 + rust/kernel/workqueue.rs | 1 + rust/macros/module.rs | 2 +- samples/rust/rust_driver_faux.rs | 4 +- samples/rust/rust_driver_pci.rs | 4 +- samples/rust/rust_driver_platform.rs | 4 +- samples/rust/rust_misc_device.rs | 3 +- 30 files changed, 256 insertions(+), 393 deletions(-) --- base-commit: 433b1bd6e0a98938105c43c0553f24e0747ef52c change-id: 20250201-cstr-core-d4b9b69120cf Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

6 months

1
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[PATCH v4 0/6] rust: reduce pointer casts, enable related lints

by Tamir Duberstein

This started with a patch that enabled `clippy::ptr_as_ptr`. Benno Lossin suggested I also look into `clippy::ptr_cast_constness` and I discovered `clippy::as_ptr_cast_mut`. This series now enables all 3 lints. It also enables `clippy::as_underscore` which ensures other pointer casts weren't missed. The first commit reduces the need for pointer casts and is shared with another series[1]. The final patch also enables pointer provenance lints and fixes violations. See that commit message for details. The build system portion of that commit is pretty messy but I couldn't find a better way to convincingly ensure that these lints were applied globally. Suggestions would be very welcome. Link: https://lore.kernel.org/all/20250307-no-offset-v1-0-0c728f63b69c@gmail.com/ [1] Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- Changes in v4: - Add missing SoB. (Benno Lossin) - Use `without_provenance_mut` in alloc. (Boqun Feng) - Limit strict provenance lints to the `kernel` crate to avoid complex logic in the build system. This can be revisited on MSRV >= 1.84.0. - Rebase on rust-next. - Link to v3: https://lore.kernel.org/r/20250314-ptr-as-ptr-v3-0-e7ba61048f4a@gmail.com Changes in v3: - Fixed clippy warning in rust/kernel/firmware.rs. (kernel test robot) Link: https://lore.kernel.org/all/202503120332.YTCpFEvv-lkp@intel.com/ - s/as u64/as bindings::phys_addr_t/g. (Benno Lossin) - Use strict provenance APIs and enable lints. (Benno Lossin) - Link to v2: https://lore.kernel.org/r/20250309-ptr-as-ptr-v2-0-25d60ad922b7@gmail.com Changes in v2: - Fixed typo in first commit message. - Added additional patches, converted to series. - Link to v1: https://lore.kernel.org/r/20250307-ptr-as-ptr-v1-1-582d06514c98@gmail.com --- Tamir Duberstein (6): rust: retain pointer mut-ness in `container_of!` rust: enable `clippy::ptr_as_ptr` lint rust: enable `clippy::ptr_cast_constness` lint rust: enable `clippy::as_ptr_cast_mut` lint rust: enable `clippy::as_underscore` lint rust: use strict provenance APIs Makefile | 4 +++ init/Kconfig | 3 ++ rust/bindings/lib.rs | 1 + rust/kernel/alloc.rs | 2 +- rust/kernel/alloc/allocator_test.rs | 2 +- rust/kernel/alloc/kvec.rs | 4 +-- rust/kernel/block/mq/operations.rs | 2 +- rust/kernel/block/mq/request.rs | 7 +++-- rust/kernel/device.rs | 5 +-- rust/kernel/device_id.rs | 2 +- rust/kernel/devres.rs | 19 ++++++------ rust/kernel/error.rs | 2 +- rust/kernel/firmware.rs | 3 +- rust/kernel/fs/file.rs | 2 +- rust/kernel/io.rs | 16 +++++----- rust/kernel/kunit.rs | 15 +++++---- rust/kernel/lib.rs | 57 ++++++++++++++++++++++++++++++++-- rust/kernel/list/impl_list_item_mod.rs | 2 +- rust/kernel/miscdevice.rs | 2 +- rust/kernel/of.rs | 6 ++-- rust/kernel/pci.rs | 15 +++++---- rust/kernel/platform.rs | 6 ++-- rust/kernel/print.rs | 11 +++---- rust/kernel/rbtree.rs | 23 ++++++-------- rust/kernel/seq_file.rs | 3 +- rust/kernel/str.rs | 18 +++++------ rust/kernel/sync/poll.rs | 2 +- rust/kernel/uaccess.rs | 12 ++++--- rust/kernel/workqueue.rs | 12 +++---- rust/uapi/lib.rs | 1 + 30 files changed, 162 insertions(+), 97 deletions(-) --- base-commit: 2aadc0fc1f85d7a9ed2822ba7ee9f06775eb6d84 change-id: 20250307-ptr-as-ptr-21b1867fc4d4 Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

6 months

3
13
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