October 2025 - Linux-kselftest-mirror

[PATCH v3] selftests/run_kselftest.sh: exit with error if tests fail

by Brendan Jackman

Parsing KTAP is quite an inconvenience, but most of the time the thing you really want to know is "did anything fail"? Let's give the user the his information without them needing to parse anything. Because of the use of subshells and namespaces, this needs to be communicated via a file. Just write arbitrary data into the file and treat non-empty content as a signal that something failed. In case any user depends on the current behaviour, such as running this from a script with `set -e` and parsing the result for failures afterwards, add a flag they can set to get the old behaviour, namely --no-error-on-fail. Signed-off-by: Brendan Jackman <jackmanb(a)google.com> --- Changes in v3: - Fixed quoting - Link to v2: https://lore.kernel.org/r/20251014-b4-ksft-error-on-fail-v2-1-b3e2657237b8@… Changes in v2: - Fixed bug in report_failure() - Made error-on-fail the default - Link to v1: https://lore.kernel.org/r/20251007-b4-ksft-error-on-fail-v1-1-71bf058f5662@… --- tools/testing/selftests/kselftest/runner.sh | 14 ++++++++++---- tools/testing/selftests/run_kselftest.sh | 14 ++++++++++++++ 2 files changed, 24 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/kselftest/runner.sh b/tools/testing/selftests/kselftest/runner.sh index 2c3c58e65a419f5ee8d7dc51a37671237a07fa0b..3a62039fa6217f3453423ff011575d0a1eb8c275 100644 --- a/tools/testing/selftests/kselftest/runner.sh +++ b/tools/testing/selftests/kselftest/runner.sh @@ -44,6 +44,12 @@ tap_timeout() fi } +report_failure() +{ + echo "not ok $*" + echo "$*" >> "$kselftest_failures_file" +} + run_one() { DIR="$1" @@ -105,7 +111,7 @@ run_one() echo "# $TEST_HDR_MSG" if [ ! -e "$TEST" ]; then echo "# Warning: file $TEST is missing!" - echo "not ok $test_num $TEST_HDR_MSG" + report_failure "$test_num $TEST_HDR_MSG" else if [ -x /usr/bin/stdbuf ]; then stdbuf="/usr/bin/stdbuf --output=L " @@ -123,7 +129,7 @@ run_one() interpreter=$(head -n 1 "$TEST" | cut -c 3-) cmd="$stdbuf $interpreter ./$BASENAME_TEST" else - echo "not ok $test_num $TEST_HDR_MSG" + report_failure "$test_num $TEST_HDR_MSG" return fi fi @@ -137,9 +143,9 @@ run_one() echo "ok $test_num $TEST_HDR_MSG # SKIP" elif [ $rc -eq $timeout_rc ]; then \ echo "#" - echo "not ok $test_num $TEST_HDR_MSG # TIMEOUT $kselftest_timeout seconds" + report_failure "$test_num $TEST_HDR_MSG # TIMEOUT $kselftest_timeout seconds" else - echo "not ok $test_num $TEST_HDR_MSG # exit=$rc" + report_failure "$test_num $TEST_HDR_MSG # exit=$rc" fi) cd - >/dev/null fi diff --git a/tools/testing/selftests/run_kselftest.sh b/tools/testing/selftests/run_kselftest.sh index 0443beacf3621ae36cb12ffd57f696ddef3526b5..d4be97498b32e975c63a1167d3060bdeba674c8c 100755 --- a/tools/testing/selftests/run_kselftest.sh +++ b/tools/testing/selftests/run_kselftest.sh @@ -33,6 +33,7 @@ Usage: $0 [OPTIONS] -c | --collection COLLECTION Run all tests from COLLECTION -l | --list List the available collection:test entries -d | --dry-run Don't actually run any tests + -f | --no-error-on-fail Don't exit with an error just because tests failed -n | --netns Run each test in namespace -h | --help Show this usage info -o | --override-timeout Number of seconds after which we timeout @@ -44,6 +45,7 @@ COLLECTIONS="" TESTS="" dryrun="" kselftest_override_timeout="" +ERROR_ON_FAIL=true while true; do case "$1" in -s | --summary) @@ -65,6 +67,9 @@ while true; do -d | --dry-run) dryrun="echo" shift ;; + -f | --no-error-on-fail) + ERROR_ON_FAIL=false + shift ;; -n | --netns) RUN_IN_NETNS=1 shift ;; @@ -105,9 +110,18 @@ if [ -n "$TESTS" ]; then available="$(echo "$valid" | sed -e 's/ /\n/g')" fi +kselftest_failures_file="$(mktemp --tmpdir kselftest-failures-XXXXXX)" +export kselftest_failures_file + collections=$(echo "$available" | cut -d: -f1 | sort | uniq) for collection in $collections ; do [ -w /dev/kmsg ] && echo "kselftest: Running tests in $collection" >> /dev/kmsg tests=$(echo "$available" | grep "^$collection:" | cut -d: -f2) ($dryrun cd "$collection" && $dryrun run_many $tests) done + +failures="$(cat "$kselftest_failures_file")" +rm "$kselftest_failures_file" +if "$ERROR_ON_FAIL" && [ "$failures" ]; then + exit 1 +fi --- base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 change-id: 20251007-b4-ksft-error-on-fail-0c2cb3246041 Best regards, -- Brendan Jackman <jackmanb(a)google.com>

2 days

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[PATCH bpf-next 0/3] selftests/bpf: small improvements on tc_tunnel

by Alexis Lothoré (eBPF Foundation)

Hello, this series is a small follow-up to the test_tc_tunnel recent integration, to address some small missing details raised during the final review ([1]). This is mostly about adding some missing checks on net namespaces management. [1] https://lore.kernel.org/bpf/1ac9d14e-4250-480c-b863-410be78ac6c6@linux.dev/ Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore(a)bootlin.com> --- Alexis Lothoré (eBPF Foundation) (3): selftests/bpf: skip tc_tunnel subtest if its setup fails selftests/bpf: add checks in tc_tunnel when entering net namespaces selftests/bpf: use start_server_str rather than start_reuseport_server in tc_tunnel .../selftests/bpf/prog_tests/test_tc_tunnel.c | 162 ++++++++++++++------- 1 file changed, 107 insertions(+), 55 deletions(-) --- base-commit: 1e2d874b04ba46a3b9fe6697097aa437641f4339 change-id: 20251030-tc_tunnel_improv-6b9d1c22c6f6 Best regards, -- Alexis Lothoré, Bootlin Embedded Linux and Kernel engineering https://bootlin.com

2 days, 4 hours

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[PATCH 0/6] KVM: LoongArch: selftests: Add timer test case

by Bibo Mao

This patch set adds timer test case for LoongArch system, it is based on common arch_timer test case. And it includes time counter function, one-shot/period mode interrupt, and software emulated timer function test. Bibo Mao (6): KVM: LoongArch: selftests: Add system registers save and restore on exception KVM: LoongArch: selftests: Add exception handler register interface KVM: LoongArch: selftests: Add basic interfaces KVM: LoongArch: selftests: Add timer test case with one-shot mode KVM: LoongArch: selftests: Add period mode timer and time counter test KVM: LoongArch: selftests: Add SW emulated timer test tools/testing/selftests/kvm/Makefile.kvm | 10 +- .../kvm/include/loongarch/arch_timer.h | 84 ++++++++ .../kvm/include/loongarch/processor.h | 81 +++++++- .../selftests/kvm/lib/loongarch/exception.S | 6 + .../selftests/kvm/lib/loongarch/processor.c | 38 +++- .../selftests/kvm/loongarch/arch_timer.c | 187 ++++++++++++++++++ 6 files changed, 400 insertions(+), 6 deletions(-) create mode 100644 tools/testing/selftests/kvm/include/loongarch/arch_timer.h create mode 100644 tools/testing/selftests/kvm/loongarch/arch_timer.c base-commit: e53642b87a4f4b03a8d7e5f8507fc3cd0c595ea6 -- 2.39.3

2 days, 9 hours

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[GIT PULL] kselftest fixes update for Linux 6.18-rc4

by Shuah Khan

Hi Linus, Please pull the following kselftest fixes update for Linux 6.18-rc4. Fixes build warning in cachestat found during clang build and adds tmpshmcstat to .gitignore. diff is attached. thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit 3a8660878839faadb4f1a6dd72c3179c1df56787: Linux 6.18-rc1 (2025-10-12 13:42:36 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux_kselftest-fixes-6.18-rc4 for you to fetch changes up to 920aa3a7705a061cb3004572d8b7932b54463dbf: selftests: cachestat: Fix warning on declaration under label (2025-10-22 09:23:18 -0600) ---------------------------------------------------------------- linux_kselftest-fixes-6.18-rc4 Fixes build warning in cachestat found during clang build and adds tmpshmcstat to .gitignore. ---------------------------------------------------------------- Madhur Kumar (1): selftests/cachestat: add tmpshmcstat file to .gitignore Sidharth Seela (1): selftests: cachestat: Fix warning on declaration under label tools/testing/selftests/cachestat/.gitignore | 1 + tools/testing/selftests/cachestat/test_cachestat.c | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) ----------------------------------------------------------------

2 days, 10 hours

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[GIT PULL] kunit fixes update for Linux 6.18-rc4

by Shuah Khan

Hi Linus, Please pull the following kunit fixes update for Linux 6.18-rc4. Fixes log overwrite in param_tests and fixes incorrect cast of priv pointer in test_dev_action(). Updates email address for Rae Moar in MAINTAINERS KUnit entry. diff is attached. thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit 3a8660878839faadb4f1a6dd72c3179c1df56787: Linux 6.18-rc1 (2025-10-12 13:42:36 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux_kselftest-kunit-fixes-6.18-rc4 for you to fetch changes up to f3903ec76ae6afcdba0347681d1dda005fb145cd: MAINTAINERS: Update KUnit email address for Rae Moar (2025-10-29 14:57:54 -0600) ---------------------------------------------------------------- linux_kselftest-kunit-fixes-6.18-rc4 Fixes log overwrite in param_tests and fixes incorrect cast of priv pointer in test_dev_action(). Updates email address for Rae Moar in MAINTAINERS KUnit entry. ---------------------------------------------------------------- Carlos Llamas (1): kunit: prevent log overwrite in param_tests Florian Schmaus (1): kunit: test_dev_action: Correctly cast 'priv' pointer to long* Rae Moar (1): MAINTAINERS: Update KUnit email address for Rae Moar .mailmap | 1 + MAINTAINERS | 2 +- lib/kunit/kunit-test.c | 2 +- lib/kunit/test.c | 3 ++- 4 files changed, 5 insertions(+), 3 deletions(-) ----------------------------------------------------------------

2 days, 10 hours

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[PATCH bpf 0/2] use rqspinlock for bpf lru map

by Menglong Dong

Convert the raw_spinlock to rqspinlock to fix the possible deadlock in [1] for bpf lru map. Meanwhile, add the testcase for the deadlock. Link: https://lore.kernel.org/bpf/CAEf4BzbTJCUx0D=zjx6+5m5iiGhwLzaP94hnw36ZMDHAf4… Menglong Dong (2): bpf: use rqspinlock for lru map selftests/bpf: test map deadlock caused by NMI kernel/bpf/bpf_lru_list.c | 47 +++--- kernel/bpf/bpf_lru_list.h | 5 +- .../selftests/bpf/prog_tests/map_deadlock.c | 134 ++++++++++++++++++ .../selftests/bpf/progs/map_deadlock.c | 52 +++++++ 4 files changed, 217 insertions(+), 21 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/map_deadlock.c create mode 100644 tools/testing/selftests/bpf/progs/map_deadlock.c -- 2.51.2

2 days, 10 hours

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[PATCH net-next v3] selftests: drv-net: replace the nsim ring test with a drv-net one

by Jakub Kicinski

We are trying to move away from netdevsim-only tests and towards tests which can be run both against netdevsim and real drivers. Replace the simple bash script we have for checking ethtool -g/-G on netdevsim with a Python test tweaking those params as well as channel count. The new test is not exactly equivalent to the netdevsim one, but real drivers don't often support random ring sizes, let alone modifying max values via debugfs. Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- v3: - let ring sizes fall all the way down to 0 v2: https://lore.kernel.org/20251027192131.2053792-1-kuba@kernel.org - add the new test to Makefile and remove the old one turns out NIPA checking for Makefile presence was busted v1: https://lore.kernel.org/20251024215552.1249838-1-kuba@kernel.org CC: andrew(a)lunn.ch CC: shuah(a)kernel.org CC: linux-kselftest(a)vger.kernel.org --- tools/testing/selftests/drivers/net/Makefile | 1 + .../selftests/drivers/net/netdevsim/Makefile | 1 - .../drivers/net/netdevsim/ethtool-ring.sh | 85 --------- .../selftests/drivers/net/ring_reconfig.py | 167 ++++++++++++++++++ 4 files changed, 168 insertions(+), 86 deletions(-) delete mode 100755 tools/testing/selftests/drivers/net/netdevsim/ethtool-ring.sh create mode 100755 tools/testing/selftests/drivers/net/ring_reconfig.py diff --git a/tools/testing/selftests/drivers/net/Makefile b/tools/testing/selftests/drivers/net/Makefile index 6e41635bd55a..68e0bb603a9d 100644 --- a/tools/testing/selftests/drivers/net/Makefile +++ b/tools/testing/selftests/drivers/net/Makefile @@ -22,6 +22,7 @@ TEST_PROGS := \ ping.py \ psp.py \ queues.py \ + ring_reconfig.py \ shaper.py \ stats.py \ xdp.py \ diff --git a/tools/testing/selftests/drivers/net/netdevsim/Makefile b/tools/testing/selftests/drivers/net/netdevsim/Makefile index daf51113c827..833abd8e6fdc 100644 --- a/tools/testing/selftests/drivers/net/netdevsim/Makefile +++ b/tools/testing/selftests/drivers/net/netdevsim/Makefile @@ -8,7 +8,6 @@ TEST_PROGS := \ ethtool-features.sh \ ethtool-fec.sh \ ethtool-pause.sh \ - ethtool-ring.sh \ fib.sh \ fib_notifications.sh \ hw_stats_l3.sh \ diff --git a/tools/testing/selftests/drivers/net/netdevsim/ethtool-ring.sh b/tools/testing/selftests/drivers/net/netdevsim/ethtool-ring.sh deleted file mode 100755 index c969559ffa7a..000000000000 --- a/tools/testing/selftests/drivers/net/netdevsim/ethtool-ring.sh +++ /dev/null @@ -1,85 +0,0 @@ -#!/bin/bash -# SPDX-License-Identifier: GPL-2.0-only - -source ethtool-common.sh - -function get_value { - local query="${SETTINGS_MAP[$1]}" - - echo $(ethtool -g $NSIM_NETDEV | \ - tail -n +$CURR_SETT_LINE | \ - awk -F':' -v pattern="$query:" '$0 ~ pattern {gsub(/[\t ]/, "", $2); print $2}') -} - -function update_current_settings { - for key in ${!SETTINGS_MAP[@]}; do - CURRENT_SETTINGS[$key]=$(get_value $key) - done - echo ${CURRENT_SETTINGS[@]} -} - -if ! ethtool -h | grep -q set-ring >/dev/null; then - echo "SKIP: No --set-ring support in ethtool" - exit 4 -fi - -NSIM_NETDEV=$(make_netdev) - -set -o pipefail - -declare -A SETTINGS_MAP=( - ["rx"]="RX" - ["rx-mini"]="RX Mini" - ["rx-jumbo"]="RX Jumbo" - ["tx"]="TX" -) - -declare -A EXPECTED_SETTINGS=( - ["rx"]="" - ["rx-mini"]="" - ["rx-jumbo"]="" - ["tx"]="" -) - -declare -A CURRENT_SETTINGS=( - ["rx"]="" - ["rx-mini"]="" - ["rx-jumbo"]="" - ["tx"]="" -) - -MAX_VALUE=$((RANDOM % $((2**32-1)))) -RING_MAX_LIST=$(ls $NSIM_DEV_DFS/ethtool/ring/) - -for ring_max_entry in $RING_MAX_LIST; do - echo $MAX_VALUE > $NSIM_DEV_DFS/ethtool/ring/$ring_max_entry -done - -CURR_SETT_LINE=$(ethtool -g $NSIM_NETDEV | grep -i -m1 -n 'Current hardware settings' | cut -f1 -d:) - -# populate the expected settings map -for key in ${!SETTINGS_MAP[@]}; do - EXPECTED_SETTINGS[$key]=$(get_value $key) -done - -# test -for key in ${!SETTINGS_MAP[@]}; do - value=$((RANDOM % $MAX_VALUE)) - - ethtool -G $NSIM_NETDEV "$key" "$value" - - EXPECTED_SETTINGS[$key]="$value" - expected=${EXPECTED_SETTINGS[@]} - current=$(update_current_settings) - - check $? "$current" "$expected" - set +x -done - -if [ $num_errors -eq 0 ]; then - echo "PASSED all $((num_passes)) checks" - exit 0 -else - echo "FAILED $num_errors/$((num_errors+num_passes)) checks" - exit 1 -fi diff --git a/tools/testing/selftests/drivers/net/ring_reconfig.py b/tools/testing/selftests/drivers/net/ring_reconfig.py new file mode 100755 index 000000000000..f9530a8b0856 --- /dev/null +++ b/tools/testing/selftests/drivers/net/ring_reconfig.py @@ -0,0 +1,167 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 + +""" +Test channel and ring size configuration via ethtool (-L / -G). +""" + +from lib.py import ksft_run, ksft_exit, ksft_pr +from lib.py import ksft_eq +from lib.py import NetDrvEpEnv, EthtoolFamily, GenerateTraffic +from lib.py import defer, NlError + + +def channels(cfg) -> None: + """ + Twiddle channel counts in various combinations of parameters. + We're only looking for driver adhering to the requested config + if the config is accepted and crashes. + """ + ehdr = {'header':{'dev-index': cfg.ifindex}} + chans = cfg.eth.channels_get(ehdr) + + all_keys = ["rx", "tx", "combined"] + mixes = [{"combined"}, {"rx", "tx"}, {"rx", "combined"}, {"tx", "combined"}, + {"rx", "tx", "combined"},] + + # Get the set of keys that device actually supports + restore = {} + supported = set() + for key in all_keys: + if key + "-max" in chans: + supported.add(key) + restore |= {key + "-count": chans[key + "-count"]} + + defer(cfg.eth.channels_set, ehdr | restore) + + def test_config(config): + try: + cfg.eth.channels_set(ehdr | config) + get = cfg.eth.channels_get(ehdr) + for k, v in config.items(): + ksft_eq(get.get(k, 0), v) + except NlError as e: + failed.append(mix) + ksft_pr("Can't set", config, e) + else: + ksft_pr("Okay", config) + + failed = [] + for mix in mixes: + if not mix.issubset(supported): + continue + + # Set all the values in the mix to 1, other supported to 0 + config = {} + for key in all_keys: + config[key + "-count"] = 1 if key in mix else 0 + test_config(config) + + for mix in mixes: + if not mix.issubset(supported): + continue + if mix in failed: + continue + + # Set all the values in the mix to max, other supported to 0 + config = {} + for key in all_keys: + config[key + "-count"] = chans[key + '-max'] if key in mix else 0 + test_config(config) + + +def _configure_min_ring_cnt(cfg) -> None: + """ Try to configure a single Rx/Tx ring. """ + ehdr = {'header':{'dev-index': cfg.ifindex}} + chans = cfg.eth.channels_get(ehdr) + + all_keys = ["rx-count", "tx-count", "combined-count"] + restore = {} + config = {} + for key in all_keys: + if key in chans: + restore[key] = chans[key] + config[key] = 0 + + if chans.get('combined-count', 0) > 1: + config['combined-count'] = 1 + elif chans.get('rx-count', 0) > 1 and chans.get('tx-count', 0) > 1: + config['tx-count'] = 1 + config['rx-count'] = 1 + else: + # looks like we're already on 1 channel + return + + cfg.eth.channels_set(ehdr | config) + defer(cfg.eth.channels_set, ehdr | restore) + + +def ringparam(cfg) -> None: + """ + Tweak the ringparam configuration. Try to run some traffic over min + ring size to make sure it actually functions. + """ + ehdr = {'header':{'dev-index': cfg.ifindex}} + rings = cfg.eth.rings_get(ehdr) + + restore = {} + maxes = {} + params = set() + for key in rings.keys(): + if 'max' in key: + param = key[:-4] + maxes[param] = rings[key] + params.add(param) + restore[param] = rings[param] + + defer(cfg.eth.rings_set, ehdr | restore) + + # Speed up the reconfig by configuring just one ring + _configure_min_ring_cnt(cfg) + + # Try to reach min on all settings + for param in params: + val = rings[param] + while True: + try: + cfg.eth.rings_set({'header':{'dev-index': cfg.ifindex}, + param: val // 2}) + if val == 0: + break + val //= 2 + except NlError: + break + + get = cfg.eth.rings_get(ehdr) + ksft_eq(get[param], val) + + ksft_pr(f"Reached min for '{param}' at {val} (max {rings[param]})") + + GenerateTraffic(cfg).wait_pkts_and_stop(10000) + + # Try max across all params, if the driver supports large rings + # this may OOM so we ignore errors + try: + ksft_pr("Applying max settings") + config = {p: maxes[p] for p in params} + cfg.eth.rings_set(ehdr | config) + except NlError as e: + ksft_pr("Can't set max params", config, e) + else: + GenerateTraffic(cfg).wait_pkts_and_stop(10000) + + +def main() -> None: + """ Ksft boiler plate main """ + + with NetDrvEpEnv(__file__) as cfg: + cfg.eth = EthtoolFamily() + + ksft_run([channels, + ringparam], + args=(cfg, )) + ksft_exit() + + +if __name__ == "__main__": + main() -- 2.51.0

2 days, 12 hours

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[PATCH net] selftests: netdevsim: Fix ethtool-features.sh fail

by Wang Liang

The test 'ethtool-features.sh' failed with the below output: TAP version 13 1..1 # timeout set to 600 # selftests: drivers/net/netdevsim: ethtool-features.sh # Warning: file ethtool-features.sh is not executable # ethtool: bad command line argument(s) # For more information run ethtool -h # ethtool: bad command line argument(s) # For more information run ethtool -h # ethtool: bad command line argument(s) # For more information run ethtool -h # ethtool: bad command line argument(s) # For more information run ethtool -h # ethtool: bad command line argument(s) # For more information run ethtool -h # ethtool: bad command line argument(s) # For more information run ethtool -h # ethtool: bad command line argument(s) # For more information run ethtool -h # ethtool: bad command line argument(s) # For more information run ethtool -h # ethtool: bad command line argument(s) # For more information run ethtool -h # ethtool: bad command line argument(s) # For more information run ethtool -h # FAILED 10/10 checks not ok 1 selftests: drivers/net/netdevsim: ethtool-features.sh # exit=1 Similar to commit 18378b0e49d9 ("selftests/damon: Add executable permission to test scripts"), the script 'ethtool-features.sh' has no executable permission, which leads to the warning 'file ethtool-features.sh is not executable'. Old version ethtool (my ethtool version is 5.16) does not support command 'ethtool --json -k enp1s0', which leads to the output 'ethtool: bad command line argument(s)'. This patch adds executable permission to script 'ethtool-features.sh', and check 'ethtool --json -k' support. After this patch: TAP version 13 1..1 # timeout set to 600 # selftests: drivers/net/netdevsim: ethtool-features.sh # SKIP: No --json -k support in ethtool ok 1 selftests: drivers/net/netdevsim: ethtool-features.sh Fixes: 0189270117c3 ("selftests: netdevsim: add a test checking ethtool features") Signed-off-by: Wang Liang <wangliang74(a)huawei.com> --- .../selftests/drivers/net/netdevsim/ethtool-features.sh | 5 +++++ 1 file changed, 5 insertions(+) mode change 100644 => 100755 tools/testing/selftests/drivers/net/netdevsim/ethtool-features.sh diff --git a/tools/testing/selftests/drivers/net/netdevsim/ethtool-features.sh b/tools/testing/selftests/drivers/net/netdevsim/ethtool-features.sh old mode 100644 new mode 100755 index bc210dc6ad2d..f771dc6839ea --- a/tools/testing/selftests/drivers/net/netdevsim/ethtool-features.sh +++ b/tools/testing/selftests/drivers/net/netdevsim/ethtool-features.sh @@ -7,6 +7,11 @@ NSIM_NETDEV=$(make_netdev) set -o pipefail +if ! ethtool --json -k $NSIM_NETDEV > /dev/null 2>&1; then + echo "SKIP: No --json -k support in ethtool" + exit $ksft_skip +fi + FEATS=" tx-checksum-ip-generic tx-scatter-gather -- 2.34.1

2 days, 13 hours

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[PATCH v2 0/4] KVM: selftests: Test SET_NESTED_STATE with 48-bit L2 on 57-bit L1

by Jim Mattson

Prior to commit 9245fd6b8531 ("KVM: x86: model canonical checks more precisely"), KVM_SET_NESTED_STATE would fail if the state was captured with L2 active, L1 had CR4.LA57 set, L2 did not, and the VMCS12.HOST_GSBASE (or other host-state field checked for canonicality) had an address greater than 48 bits wide. Add a regression test that reproduces the KVM_SET_NESTED_STATE failure conditions. To do so, the first three patches add support for 5-level paging in the selftest L1 VM. v1 -> v2 Ended the page walking loops before visiting 4K mappings [Yosry] Changed VM_MODE_PXXV48_4K into VM_MODE_PXXVYY_4K; use 5-level paging when possible [Sean] Removed the check for non-NULL vmx_pages in guest_code() [Yosry] Jim Mattson (4): KVM: selftests: Use a loop to create guest page tables KVM: selftests: Use a loop to walk guest page tables KVM: selftests: Change VM_MODE_PXXV48_4K to VM_MODE_PXXVYY_4K KVM: selftests: Add a VMX test for LA57 nested state tools/testing/selftests/kvm/Makefile.kvm | 1 + .../testing/selftests/kvm/include/kvm_util.h | 4 +- .../selftests/kvm/include/x86/processor.h | 2 +- .../selftests/kvm/lib/arm64/processor.c | 2 +- tools/testing/selftests/kvm/lib/kvm_util.c | 30 ++-- .../testing/selftests/kvm/lib/x86/processor.c | 80 +++++------ tools/testing/selftests/kvm/lib/x86/vmx.c | 6 +- .../kvm/x86/vmx_la57_nested_state_test.c | 134 ++++++++++++++++++ 8 files changed, 197 insertions(+), 62 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86/vmx_la57_nested_state_test.c -- 2.51.1.851.g4ebd6896fd-goog

2 days, 13 hours

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[PATCH v6 0/2] KVM: guest_memfd: use write for population

by Kalyazin, Nikita

[ based on kvm/next ] Implement guest_memfd population via the write syscall. This is useful in non-CoCo use cases where the host can access guest memory. Even though the same can also be achieved via userspace mapping and memcpying from userspace, write provides a more performant option because it does not need to set page tables and it does not cause a page fault for every page like memcpy would. Note that memcpy cannot be accelerated via MADV_POPULATE_WRITE as it is not supported by guest_memfd and relies on GUP. Populating 512MiB of guest_memfd on a x86 machine: - via memcpy: 436 ms - via write: 202 ms (-54%) The write syscall support is conditional on kvm_gmem_supports_mmap. When in-place shared/private conversion is supported, write should only be allowed on shared pages. v6: - Make write support conditional on mmap support instead of relying on the up-to-date flag to decide whether writing to a page is allowed - James: Remove depenendencies on folio_test_large - James: Remove page alignment restriction - James: Formatting fixes v5: - https://lore.kernel.org/kvm/20250902111951.58315-1-kalyazin@amazon.com/ - Replace the call to the unexported filemap_remove_folio with zeroing the bytes that could not be copied - Fix checkpatch findings v4: - https://lore.kernel.org/kvm/20250828153049.3922-1-kalyazin@amazon.com - Switch from implementing the write callback to write_iter - Remove conditional compilation v3: - https://lore.kernel.org/kvm/20250303130838.28812-1-kalyazin@amazon.com - David/Mike D: Only compile support for the write syscall if CONFIG_KVM_GMEM_SHARED_MEM (now gone) is enabled. v2: - https://lore.kernel.org/kvm/20241129123929.64790-1-kalyazin@amazon.com - Switch from an ioctl to the write syscall to implement population v1: - https://lore.kernel.org/kvm/20241024095429.54052-1-kalyazin@amazon.com Nikita Kalyazin (2): KVM: guest_memfd: add generic population via write KVM: selftests: update guest_memfd write tests .../testing/selftests/kvm/guest_memfd_test.c | 51 ++++++++++++++++--- virt/kvm/guest_memfd.c | 49 ++++++++++++++++++ 2 files changed, 94 insertions(+), 6 deletions(-) base-commit: 6b36119b94d0b2bb8cea9d512017efafd461d6ac -- 2.50.1

2 days, 15 hours

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Linux-kselftest-mirror October 2025