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[PATCH v2 0/6] Add support for FEAT_{LS64, LS64_V} and related tests

by Yicong Yang

From: Yicong Yang <yangyicong(a)hisilicon.com> Armv8.7 introduces single-copy atomic 64-byte loads and stores instructions and its variants named under FEAT_{LS64, LS64_V}. Add support for Armv8.7 FEAT_{LS64, LS64_V}: - Add identifying and enabling in the cpufeature list - Expose the support of these features to userspace through HWCAP3 and cpuinfo - Add related hwcap test - Handle the trap of unsupported memory (normal/uncacheable) access in a VM A real scenario for this feature is that the userspace driver can make use of this to implement direct WQE (workqueue entry) - a mechanism to fill WQE directly into the hardware. This patchset also complement with Marc's patchset v2[1] for handling LS64* trapped if not advertised for a VM. [1] https://lore.kernel.org/linux-arm-kernel/20250310122505.2857610-1-maz@kerne… Tested with updated hwcap test: On host: root@localhost:/tmp# dmesg | grep "All CPU(s) started" [ 0.504846] CPU: All CPU(s) started at EL2 root@localhost:/tmp# ./hwcap [...] # LS64 present ok 217 cpuinfo_match_LS64 ok 218 sigill_LS64 ok 219 # SKIP sigbus_LS64 # LS64_V present ok 220 cpuinfo_match_LS64_V ok 221 sigill_LS64_V ok 222 # SKIP sigbus_LS64_V # 115 skipped test(s) detected. Consider enabling relevant config options to improve coverage. # Totals: pass:107 fail:0 xfail:0 xpass:0 skip:115 error:0 On guest: root@localhost:/# dmesg | grep "All CPU(s) started" [ 0.205580] CPU: All CPU(s) started at EL1 root@localhost:/mnt# ./hwcap [...] # LS64 present ok 217 cpuinfo_match_LS64 ok 218 sigill_LS64 ok 219 # SKIP sigbus_LS64 # LS64_V present ok 220 cpuinfo_match_LS64_V ok 221 sigill_LS64_V ok 222 # SKIP sigbus_LS64_V # 115 skipped test(s) detected. Consider enabling relevant config options to improve coverage. # Totals: pass:107 fail:0 xfail:0 xpass:0 skip:115 error:0 Change since v1: - Drop the suppport for LS64_ACCDATA - handle the DABT of unsupported memory type after checking the memory attributes Link: https://lore.kernel.org/linux-arm-kernel/20241202135504.14252-1-yangyicong@… Yicong Yang (6): arm64: Provide basic EL2 setup for FEAT_{LS64, LS64_V} usage at EL0/1 arm64: Add support for FEAT_{LS64, LS64_V} KVM: arm64: Enable FEAT_{LS64, LS64_V} in the supported guest kselftest/arm64: Add HWCAP test for FEAT_{LS64, LS64_V} arm64: Add ESR.DFSC definition of unsupported exclusive or atomic access KVM: arm64: Handle DABT caused by LS64* instructions on unsupported memory Documentation/arch/arm64/booting.rst | 12 +++ Documentation/arch/arm64/elf_hwcaps.rst | 6 ++ arch/arm64/include/asm/el2_setup.h | 12 ++- arch/arm64/include/asm/esr.h | 8 ++ arch/arm64/include/asm/hwcap.h | 2 + arch/arm64/include/asm/kvm_emulate.h | 7 ++ arch/arm64/include/uapi/asm/hwcap.h | 2 + arch/arm64/kernel/cpufeature.c | 51 +++++++++++++ arch/arm64/kernel/cpuinfo.c | 2 + arch/arm64/kvm/inject_fault.c | 35 +++++++++ arch/arm64/kvm/mmu.c | 37 +++++++++- arch/arm64/tools/cpucaps | 2 + tools/testing/selftests/arm64/abi/hwcap.c | 90 +++++++++++++++++++++++ 13 files changed, 264 insertions(+), 2 deletions(-) -- 2.24.0

4 months, 3 weeks

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[PATCH 0/3] RISC-V KVM selftests improvements

by Atish Patra

This series improves the following tests. 1. Get-reg-list : Adds vector support 2. SBI PMU test : Distinguish between different types of illegal exception The first patch is just helper patch that adds stval support during exception handling. Signed-off-by: Atish Patra <atishp(a)rivosinc.com> --- Atish Patra (3): KVM: riscv: selftests: Add stval to exception handling KVM: riscv: selftests: Decode stval to identify exact exception type KVM: riscv: selftests: Add vector extension tests .../selftests/kvm/include/riscv/processor.h | 1 + tools/testing/selftests/kvm/lib/riscv/handlers.S | 2 + tools/testing/selftests/kvm/riscv/get-reg-list.c | 111 ++++++++++++++++++++- tools/testing/selftests/kvm/riscv/sbi_pmu_test.c | 32 ++++++ 4 files changed, 145 insertions(+), 1 deletion(-) --- base-commit: b3f263a98d30fe2e33eefea297598c590ee3560e change-id: 20250324-kvm_selftest_improve-9bedb9f0a6d3 -- Regards, Atish patra

4 months, 3 weeks

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[PATCH] kunit: executor: Remove const from kunit_filter_suites() allocation type

by Kees Cook

In preparation for making the kmalloc family of allocators type aware, we need to make sure that the returned type from the allocation matches the type of the variable being assigned. (Before, the allocator would always return "void *", which can be implicitly cast to any pointer type.) The assigned type is "struct kunit_suite **" but the returned type will be "struct kunit_suite * const *". Since it isn't generally possible to remove the const qualifier, adjust the allocation type to match the assignment. Signed-off-by: Kees Cook <kees(a)kernel.org> --- Cc: Brendan Higgins <brendan.higgins(a)linux.dev> Cc: David Gow <davidgow(a)google.com> Cc: Rae Moar <rmoar(a)google.com> Cc: <linux-kselftest(a)vger.kernel.org> Cc: <kunit-dev(a)googlegroups.com> --- lib/kunit/executor.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/kunit/executor.c b/lib/kunit/executor.c index 3f39955cb0f1..0061d4c7e351 100644 --- a/lib/kunit/executor.c +++ b/lib/kunit/executor.c @@ -177,7 +177,7 @@ kunit_filter_suites(const struct kunit_suite_set *suite_set, const size_t max = suite_set->end - suite_set->start; - copy = kcalloc(max, sizeof(*filtered.start), GFP_KERNEL); + copy = kcalloc(max, sizeof(*copy), GFP_KERNEL); if (!copy) { /* won't be able to run anything, return an empty set */ return filtered; } -- 2.34.1

4 months, 3 weeks

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[PATCH] fix(script): improve safety and formatting for WRITES_STRICT restore

by Alexander Shatalin

From: Alexander Shatalin <sashatalin03(a)gmail.com> This patch improves the safety when restoring WRITES_STRICT by ensuring: - The variable is not empty (`-n`) - The target file is writable (`-w`) Also improves formatting by quoting variables and following shell best practices. Signed-off-by: Alexander Shatalin <sashatalin03(a)gmail.com>

4 months, 3 weeks

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[PATCH 1/2] selftests/mm: Fix build break when compiling pkey_util.c

by Nysal Jan K.A.

From: Madhavan Srinivasan <maddy(a)linux.ibm.com> Commit 50910acd6f615 ("selftests/mm: use sys_pkey helpers consistently") added a pkey_util.c to refactor some of the protection_keys functions accessible by other tests. But this broken the build in powerpc in two ways, pkey-powerpc.h: In function ‘arch_is_powervm’: pkey-powerpc.h:73:21: error: storage size of ‘buf’ isn’t known 73 | struct stat buf; | ^~~ pkey-powerpc.h:75:14: error: implicit declaration of function ‘stat’; did you mean ‘strcat’? [-Wimplicit-function-declaration] 75 | if ((stat("/sys/firmware/devicetree/base/ibm,partition-name", &buf) == 0) && | ^~~~ | strcat Since pkey_util.c includes pkeys-helper.h, which in turn includes pkeys-powerpc.h, stat.h including is missing for "struct stat". This is fixed by adding "sys/stat.h" in pkeys-powerpc.h Secondly, pkey-powerpc.h:55:18: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘u64’ {aka ‘long unsigned int’} [-Wformat=] 55 | dprintf4("%s() changing %016llx to %016llx\n", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 56 | __func__, __read_pkey_reg(), pkey_reg); | ~~~~~~~~~~~~~~~~~ | | | u64 {aka long unsigned int} pkey-helpers.h:63:32: note: in definition of macro ‘dprintf_level’ 63 | sigsafe_printf(args); \ | ^~~~ These format specifier related warning are removed by adding "__SANE_USERSPACE_TYPES__" to pkeys_utils.c. Fixes: 50910acd6f615 ("selftests/mm: use sys_pkey helpers consistently") Signed-off-by: Madhavan Srinivasan <maddy(a)linux.ibm.com> Signed-off-by: Nysal Jan K.A. <nysal(a)linux.ibm.com> --- tools/testing/selftests/mm/pkey-powerpc.h | 2 ++ tools/testing/selftests/mm/pkey_util.c | 1 + 2 files changed, 3 insertions(+) diff --git a/tools/testing/selftests/mm/pkey-powerpc.h b/tools/testing/selftests/mm/pkey-powerpc.h index 1bad310d282a..d8ec906b8120 100644 --- a/tools/testing/selftests/mm/pkey-powerpc.h +++ b/tools/testing/selftests/mm/pkey-powerpc.h @@ -3,6 +3,8 @@ #ifndef _PKEYS_POWERPC_H #define _PKEYS_POWERPC_H +#include <sys/stat.h> + #ifndef SYS_pkey_alloc # define SYS_pkey_alloc 384 # define SYS_pkey_free 385 diff --git a/tools/testing/selftests/mm/pkey_util.c b/tools/testing/selftests/mm/pkey_util.c index ca4ad0d44ab2..255b332f7a08 100644 --- a/tools/testing/selftests/mm/pkey_util.c +++ b/tools/testing/selftests/mm/pkey_util.c @@ -1,4 +1,5 @@ // SPDX-License-Identifier: GPL-2.0-only +#define __SANE_USERSPACE_TYPES__ #include <sys/syscall.h> #include <unistd.h> -- 2.47.0

4 months, 3 weeks

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[PATCH v2 00/15] tools/nolibc: various new functions

by Thomas Weißschuh

A few functions used by different selftests. Adding them now avoids later conflicts between different selftest serieses. Also add full support for nolibc-test.c on riscv32. All unsupported syscalls have been replaced. Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- Changes in v2: - Rebase onto latest nolibc next branch - Move #include "nolibc.h" to the top of the headers - Include linux/random.h from sys/random.h - Don't block on missing entropy in getrandom() selftest - Also test negative result of difftime() - Simplify fopen() - Link to v1: https://lore.kernel.org/r/20250423-nolibc-misc-v1-0-a925bf40297b@linutronix… --- Thomas Weißschuh (15): tools/nolibc: add strstr() tools/nolibc: add %m printf format tools/nolibc: add more stat() variants tools/nolibc: add mremap() tools/nolibc: add getrandom() tools/nolibc: add abs() and friends tools/nolibc: add support for access() and faccessat() tools/nolibc: add clock_getres(), clock_gettime() and clock_settime() tools/nolibc: add timer functions tools/nolibc: add timerfd functionality tools/nolibc: add difftime() tools/nolibc: add namespace functionality tools/nolibc: add fopen() tools/nolibc: fall back to sys_clock_gettime() in gettimeofday() tools/nolibc: implement wait() in terms of waitpid() tools/include/nolibc/Makefile | 4 + tools/include/nolibc/math.h | 31 ++++ tools/include/nolibc/nolibc.h | 4 + tools/include/nolibc/sched.h | 50 +++++ tools/include/nolibc/stdio.h | 27 +++ tools/include/nolibc/stdlib.h | 18 ++ tools/include/nolibc/string.h | 20 ++ tools/include/nolibc/sys/mman.h | 19 ++ tools/include/nolibc/sys/random.h | 34 ++++ tools/include/nolibc/sys/stat.h | 25 ++- tools/include/nolibc/sys/time.h | 15 +- tools/include/nolibc/sys/timerfd.h | 87 +++++++++ tools/include/nolibc/sys/wait.h | 12 +- tools/include/nolibc/time.h | 185 ++++++++++++++++++ tools/include/nolibc/types.h | 3 + tools/include/nolibc/unistd.h | 28 +++ tools/testing/selftests/nolibc/Makefile | 2 + tools/testing/selftests/nolibc/nolibc-test.c | 268 ++++++++++++++++++++++++++- 18 files changed, 820 insertions(+), 12 deletions(-) --- base-commit: 2051d3b830c0889ae55e37e9e8ff0d43a4acd482 change-id: 20250415-nolibc-misc-f2548ccc5ce1 Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

4 months, 3 weeks

1
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[RFC PATCH 0/3] KVM: arm64: Don't claim MTE_ASYNC if not supported

by Ben Horgan

The ID_AA64PFR1_EL1.MTE_frac field is currently hidden from KVM. However, when ID_AA64PFR1_EL1.MTE==2, ID_AA64PFR1_EL1.MTE_frac==0 indicates that MTE_ASYNC is supported. On a host with ID_AA64PFR1_EL1.MTE==2 but without MTE_ASYNC support a guest with the MTE capability enabled will incorrectly see MTE_ASYNC advertised as supported. This series fixes that. This was found by inspection and the current behaviour is not known to break anything. Linux doesn't check MTE_frac, and wrongly, assumes MTE async faults can be generated whenever MTE is supported. This is a separate problem and not addressed here. I am looking for feedback on whether this change is valuable or otherwise. Ben Horgan (3): arm64/sysreg: Expose MTE_frac so that it is visible to KVM KVM: arm64: Make MTE_frac masking conditional on MTE capability KVM: selftests: Confirm exposing MTE_frac does not break migration arch/arm64/kernel/cpufeature.c | 1 + arch/arm64/kvm/sys_regs.c | 26 ++++++- .../testing/selftests/kvm/arm64/set_id_regs.c | 77 ++++++++++++++++++- 3 files changed, 101 insertions(+), 3 deletions(-) base-commit: 8ffd015db85fea3e15a77027fda6c02ced4d2444 -- 2.43.0

4 months, 3 weeks

2
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[PATCH 00/15] tools/nolibc: various new functions

by Thomas Weißschuh

A few functions used by different selftests. Adding them now avoids later conflicts between different selftest serieses. Also add full support for nolibc-test.c on riscv32. All unsupported syscalls have been replaced. Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- Thomas Weißschuh (15): tools/nolibc: add strstr() tools/nolibc: add %m printf format tools/nolibc: add more stat() variants tools/nolibc: add mremap() tools/nolibc: add getrandom() tools/nolibc: add abs() and friends tools/nolibc: add support for access() and faccessat() tools/nolibc: add clock_getres(), clock_gettime() and clock_settime() tools/nolibc: add timer functions tools/nolibc: add timerfd functionality tools/nolibc: add difftime() tools/nolibc: add namespace functionality tools/nolibc: add fopen() tools/nolibc: implement fall back to sys_clock_gettime() in gettimeofday() tools/nolibc: implement wait() in terms of waitpid() tools/include/nolibc/Makefile | 4 + tools/include/nolibc/math.h | 31 ++++ tools/include/nolibc/nolibc.h | 4 + tools/include/nolibc/sched.h | 50 ++++++ tools/include/nolibc/stdio.h | 34 ++++ tools/include/nolibc/stdlib.h | 18 ++ tools/include/nolibc/string.h | 20 +++ tools/include/nolibc/sys/mman.h | 19 ++ tools/include/nolibc/sys/random.h | 32 ++++ tools/include/nolibc/sys/stat.h | 25 ++- tools/include/nolibc/sys/time.h | 15 +- tools/include/nolibc/sys/timerfd.h | 87 +++++++++ tools/include/nolibc/sys/wait.h | 12 +- tools/include/nolibc/time.h | 185 +++++++++++++++++++ tools/include/nolibc/types.h | 3 + tools/include/nolibc/unistd.h | 28 +++ tools/testing/selftests/nolibc/Makefile | 2 + tools/testing/selftests/nolibc/nolibc-test.c | 254 ++++++++++++++++++++++++++- 18 files changed, 811 insertions(+), 12 deletions(-) --- base-commit: e90ce42e81381665dbcedc5fa12e74759ee89639 change-id: 20250415-nolibc-misc-f2548ccc5ce1 Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

4 months, 3 weeks

2
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Support for .kernelci.yaml file for in-tree configuration

by Krzysztof Wilczyński

Hello everyone, A heads up! Work on moving some aspects of the KernelCI configuration into an in-tree (or per-project, if you wish) file called ".kernelci.yaml" has started and is currently in the early design and implementation stage. This is why we need your feedback to ensure that the feature implementation moves in the right direction and will meet the user's needs. Please have a look at the following GitHub issue: https://github.com/kernelci/kernelci-pipeline/issues/1126 The linked issue is where anyone interested in this feature can get involved to discuss implementation details, ask questions, etc. You can, of course, ask questions here, too. This new feature will eventually pave the way for the introduction of a push model to KernelCI, along with the pull model we currently have, allowing for the integration of different Git hosting platforms, such as GitHub, GitLab, etc., where events sent to us from these platforms will trigger an appropriate behaviour on the KernelCI's side. However, this new functionality will be added as a mid-term deliverable, where the ability to configure KernelCI via the ".kernelci.yaml" file is one of the crucial dependencies. Please don't hesitate to get involved and provide feedback. Thank you! On behalf of the KernelCI maintainers, Krzysztof

4 months, 3 weeks

1
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[PATCH 0/2] Fix compile-time and run-time issues for pid_namespace

by Tiezhu Yang

Tiezhu Yang (2): selftests: pid_namespace: Include sys/mount.h selftests: pid_namespace: Skip tests if not root tools/testing/selftests/pid_namespace/pid_max.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) -- 2.42.0

4 months, 3 weeks

1
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