Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
93 lines
2.4 KiB
Bash
Executable File
93 lines
2.4 KiB
Bash
Executable File
#!/bin/bash
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# AMD IBS software filtering
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ParanoidAndNotRoot() {
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[ "$(id -u)" != 0 ] && [ "$(cat /proc/sys/kernel/perf_event_paranoid)" -gt $1 ]
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}
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echo "check availability of IBS swfilt"
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# check if IBS PMU is available
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if [ ! -d /sys/bus/event_source/devices/ibs_op ]; then
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echo "[SKIP] IBS PMU does not exist"
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exit 2
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fi
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# check if IBS PMU has swfilt format
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if [ ! -f /sys/bus/event_source/devices/ibs_op/format/swfilt ]; then
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echo "[SKIP] IBS PMU does not have swfilt"
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exit 2
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fi
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echo "run perf record with modifier and swfilt"
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err=0
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# setting any modifiers should fail
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perf record -B -e ibs_op//u -o /dev/null true 2> /dev/null
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if [ $? -eq 0 ]; then
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echo "[FAIL] IBS PMU should not accept exclude_kernel"
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exit 1
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fi
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# setting it with swfilt should be fine
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perf record -B -e ibs_op/swfilt/u -o /dev/null true
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if [ $? -ne 0 ]; then
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echo "[FAIL] IBS op PMU cannot handle swfilt for exclude_kernel"
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exit 1
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fi
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if ! ParanoidAndNotRoot 1
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then
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# setting it with swfilt=1 should be fine
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perf record -B -e ibs_op/swfilt=1/k -o /dev/null true
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if [ $? -ne 0 ]; then
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echo "[FAIL] IBS op PMU cannot handle swfilt for exclude_user"
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exit 1
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fi
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else
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echo "[SKIP] not root and perf_event_paranoid too high for exclude_user"
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err=2
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fi
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# check ibs_fetch PMU as well
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perf record -B -e ibs_fetch/swfilt/u -o /dev/null true
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if [ $? -ne 0 ]; then
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echo "[FAIL] IBS fetch PMU cannot handle swfilt for exclude_kernel"
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exit 1
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fi
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# check system wide recording
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if ! ParanoidAndNotRoot 0
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then
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perf record -aB --synth=no -e ibs_op/swfilt/k -o /dev/null true
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if [ $? -ne 0 ]; then
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echo "[FAIL] IBS op PMU cannot handle swfilt in system-wide mode"
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exit 1
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fi
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else
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echo "[SKIP] not root and perf_event_paranoid too high for system-wide/exclude_user"
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err=2
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fi
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echo "check number of samples with swfilt"
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kernel_sample=$(perf record -e ibs_op/swfilt/u -o- true | perf script -i- -F misc | grep -c ^K)
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if [ ${kernel_sample} -ne 0 ]; then
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echo "[FAIL] unexpected kernel samples: " ${kernel_sample}
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exit 1
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fi
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if ! ParanoidAndNotRoot 1
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then
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user_sample=$(perf record -e ibs_fetch/swfilt/k -o- true | perf script -i- -F misc | grep -c ^U)
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if [ ${user_sample} -ne 0 ]; then
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echo "[FAIL] unexpected user samples: " ${user_sample}
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exit 1
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fi
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else
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echo "[SKIP] not root and perf_event_paranoid too high for exclude_user"
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err=2
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fi
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exit $err
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