Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

12 files changed, 328 insertions, 0 deletions

diff --git a/tools/testing/selftests/verification/.gitignore b/tools/testing/selftests/verification/.gitignore
new file mode 100644
index 000000000..2659417cb
--- /dev/null
+++ b/tools/testing/selftests/verification/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+logs
diff --git a/tools/testing/selftests/verification/Makefile b/tools/testing/selftests/verification/Makefile
new file mode 100644
index 000000000..aa8790c22
--- /dev/null
+++ b/tools/testing/selftests/verification/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+all:
+
+TEST_PROGS := verificationtest-ktap
+TEST_FILES := test.d settings
+EXTRA_CLEAN := $(OUTPUT)/logs/*
+
+include ../lib.mk
diff --git a/tools/testing/selftests/verification/config b/tools/testing/selftests/verification/config
new file mode 100644
index 000000000..43072c1c3
--- /dev/null
+++ b/tools/testing/selftests/verification/config
@@ -0,0 +1 @@
+CONFIG_RV=y
diff --git a/tools/testing/selftests/verification/settings b/tools/testing/selftests/verification/settings
new file mode 100644
index 000000000..e7b941753
--- /dev/null
+++ b/tools/testing/selftests/verification/settings
@@ -0,0 +1 @@
+timeout=0
diff --git a/tools/testing/selftests/verification/test.d/functions b/tools/testing/selftests/verification/test.d/functions
new file mode 100644
index 000000000..ec36a092f
--- /dev/null
+++ b/tools/testing/selftests/verification/test.d/functions
@@ -0,0 +1,39 @@
+check_requires() { # Check required files, monitors and reactors
+	for i in "$@" ; do
+		p=${i%:program}
+		m=${i%:monitor}
+		r=${i%:reactor}
+		if [ $p != $i ]; then
+			if ! which $p ; then
+				echo "Required program $p is not found."
+				exit_unresolved
+			fi
+		elif [ $m != $i ]; then
+			if ! grep -wq $m available_monitors ; then
+				echo "Required monitor $m is not configured."
+				exit_unsupported
+			fi
+		elif [ $r != $i ]; then
+			if ! grep -wq $r available_reactors ; then
+				echo "Required reactor $r is not configured."
+				exit_unsupported
+			fi
+		elif [ ! -e $i ]; then
+			echo "Required feature interface $i doesn't exist."
+			exit_unsupported
+		fi
+	done
+}
+
+initialize_system() { # Reset RV to initial-state
+	echo > enabled_monitors
+	for m in monitors/*; do
+		echo nop > $m/reactors || true
+	done
+	echo 1 > monitoring_on
+	echo 1 > reacting_on || true
+}
+
+finish_system() {
+	initialize_system
+}
diff --git a/tools/testing/selftests/verification/test.d/rv_deadline.tc b/tools/testing/selftests/verification/test.d/rv_deadline.tc
new file mode 100644
index 000000000..fc95267db
--- /dev/null
+++ b/tools/testing/selftests/verification/test.d/rv_deadline.tc
@@ -0,0 +1,23 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-or-later
+# description: Test deadline monitors trigger no reaction
+# requires: available_reactors deadline:monitor printk:reactor stress-ng:program
+
+load() { # returns true if there was a reaction
+	local lines_before
+	lines_before=$(dmesg | wc -l)
+	stress-ng --cpu 2 --sched deadline --sched-period 100000000 \
+		--sched-deadline 100000000 --sched-runtime 20000000 -t 5 &
+	stress-ng --cpu 2 --sched rr --sched-prio 50 --cyclic 1 \
+		--cyclic-policy rr --cyclic-prio 50 -t 5 &
+	wait
+	dmesg | tail -n +$((lines_before + 1)) | grep -q "rv: monitor [a-z]\+ does not allow event"
+}
+
+echo 1 > monitors/deadline/enable
+echo printk > monitors/deadline/reactors
+
+! load || false
+
+echo nop > monitors/deadline/reactors
+echo 0 > monitors/deadline/enable
diff --git a/tools/testing/selftests/verification/test.d/rv_monitor_enable_disable.tc b/tools/testing/selftests/verification/test.d/rv_monitor_enable_disable.tc
new file mode 100644
index 000000000..61e2c8b54
--- /dev/null
+++ b/tools/testing/selftests/verification/test.d/rv_monitor_enable_disable.tc
@@ -0,0 +1,75 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-or-later
+# description: Test monitor enable/disable
+
+test_simple_monitor() {
+    local monitor="$1"
+    local prefix="$2" # nested monitors
+
+    echo 1 > "monitors/$prefix$monitor/enable"
+    grep -q "$monitor$" enabled_monitors
+
+    echo 0 > "monitors/$prefix$monitor/enable"
+    ! grep -q "$monitor$" enabled_monitors || false
+
+    echo "$monitor" >> enabled_monitors
+    grep -q 1 "monitors/$prefix$monitor/enable"
+
+    echo "!$monitor" >> enabled_monitors
+    grep -q 0 "monitors/$prefix$monitor/enable"
+}
+
+test_container_monitor() {
+    local monitor="$1"
+	local nested
+
+    echo 1 > "monitors/$monitor/enable"
+    grep -q "^$monitor$" enabled_monitors
+
+    for nested_dir in "monitors/$monitor"/*; do
+        [ -d "$nested_dir" ] || continue
+        nested=$(basename "$nested_dir")
+        grep -q "^$monitor:$nested$" enabled_monitors
+    done
+	test -n "$nested"
+
+    echo 0 > "monitors/$monitor/enable"
+    ! grep -q "^$monitor$" enabled_monitors || false
+
+    for nested_dir in "monitors/$monitor"/*; do
+        [ -d "$nested_dir" ] || continue
+        nested=$(basename "$nested_dir")
+        ! grep -q "^$monitor:$nested$" enabled_monitors || false
+    done
+
+    echo "$monitor" >> enabled_monitors
+    grep -q 1 "monitors/$monitor/enable"
+
+    for nested_dir in "monitors/$monitor"/*; do
+        [ -d "$nested_dir" ] || continue
+        nested=$(basename "$nested_dir")
+        grep -q "^$monitor:$nested$" enabled_monitors
+    done
+
+    echo "!$monitor" >> enabled_monitors
+    grep -q 0 "monitors/$monitor/enable"
+
+    for nested_dir in "monitors/$monitor"/*; do
+        [ -d "$nested_dir" ] || continue
+        nested=$(basename "$nested_dir")
+		test_simple_monitor "$nested" "$monitor/"
+    done
+}
+
+for monitor_dir in monitors/*; do
+    monitor=$(basename "$monitor_dir")
+
+    if find "$monitor_dir" -mindepth 1 -type d | grep -q .; then
+        test_container_monitor "$monitor"
+    else
+        test_simple_monitor "$monitor"
+    fi
+done
+
+! echo non_existent_monitor > enabled_monitors || false
+! grep -q "^non_existent_monitor$" enabled_monitors || false
diff --git a/tools/testing/selftests/verification/test.d/rv_monitor_reactor.tc b/tools/testing/selftests/verification/test.d/rv_monitor_reactor.tc
new file mode 100644
index 000000000..516a20971
--- /dev/null
+++ b/tools/testing/selftests/verification/test.d/rv_monitor_reactor.tc
@@ -0,0 +1,68 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-or-later
+# description: Test monitor reactor setting
+# requires: available_reactors
+
+test_monitor_reactor() {
+    local monitor="$1"
+    local prefix="$2" # nested monitors
+
+    while read -r reactor; do
+        [ "$reactor" = nop ] && continue
+
+        echo "$reactor" > "monitors/$prefix$monitor/reactors"
+        grep -q "\\[$reactor\\]" "monitors/$prefix$monitor/reactors"
+    done < available_reactors
+
+    echo nop > "monitors/$prefix$monitor/reactors"
+    grep -q "\\[nop\\]" "monitors/$prefix$monitor/reactors"
+}
+
+test_container_monitor() {
+    local monitor="$1"
+	local nested
+
+    while read -r reactor; do
+        [ "$reactor" = nop ] && continue
+
+        echo "$reactor" > "monitors/$monitor/reactors"
+        grep -q "\\[$reactor\\]" "monitors/$monitor/reactors"
+
+        for nested_dir in "monitors/$monitor"/*; do
+            [ -d "$nested_dir" ] || continue
+            nested=$(basename "$nested_dir")
+            grep -q "\\[$reactor\\]" "monitors/$monitor/$nested/reactors"
+        done
+    done < available_reactors
+	test -n "$nested"
+
+    echo nop > "monitors/$monitor/reactors"
+    grep -q "\\[nop\\]" "monitors/$monitor/reactors"
+
+    for nested_dir in "monitors/$monitor"/*; do
+        [ -d "$nested_dir" ] || continue
+        nested=$(basename "$nested_dir")
+        grep -q "\\[nop\\]" "monitors/$monitor/$nested/reactors"
+    done
+
+    for nested_dir in "monitors/$monitor"/*; do
+        [ -d "$nested_dir" ] || continue
+        nested=$(basename "$nested_dir")
+        test_monitor_reactor "$nested" "$monitor/"
+    done
+}
+
+for monitor_dir in monitors/*; do
+    monitor=$(basename "$monitor_dir")
+
+    if find "$monitor_dir" -mindepth 1 -type d | grep -q .; then
+        test_container_monitor "$monitor"
+    else
+        test_monitor_reactor "$monitor"
+    fi
+done
+
+monitor=$(ls /sys/kernel/tracing/rv/monitors -1 | head -n 1)
+test -f "monitors/$monitor/reactors"
+! echo non_existent_reactor > "monitors/$monitor/reactors" || false
+! grep -q "\\[non_existent_reactor\\]" "monitors/$monitor/reactors" || false
diff --git a/tools/testing/selftests/verification/test.d/rv_monitors_available.tc b/tools/testing/selftests/verification/test.d/rv_monitors_available.tc
new file mode 100644
index 000000000..e6a4a1410
--- /dev/null
+++ b/tools/testing/selftests/verification/test.d/rv_monitors_available.tc
@@ -0,0 +1,18 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-or-later
+# description: Check available monitors
+
+for monitor_dir in monitors/*; do
+    monitor=$(basename "$monitor_dir")
+
+    grep -q "^$monitor$" available_monitors
+    grep -q . "$monitor_dir"/desc
+
+    for nested_dir in "$monitor_dir"/*; do
+        [ -d "$nested_dir" ] || continue
+        nested=$(basename "$nested_dir")
+
+        grep -q "^$monitor:$nested$" available_monitors
+		grep -q . "$nested_dir"/desc
+    done
+done
diff --git a/tools/testing/selftests/verification/test.d/rv_stall.tc b/tools/testing/selftests/verification/test.d/rv_stall.tc
new file mode 100644
index 000000000..515a10263
--- /dev/null
+++ b/tools/testing/selftests/verification/test.d/rv_stall.tc
@@ -0,0 +1,33 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-or-later
+# description: Test stall monitor
+# requires: available_reactors stall:monitor printk:reactor stress-ng:program
+
+THRESHOLD=/sys/module/stall/parameters/threshold_jiffies
+ORIG_THRESHOLD=$(cat $THRESHOLD)
+trap 'echo $ORIG_THRESHOLD > $THRESHOLD' EXIT
+
+load() { # returns true if there was a reaction
+	local lines_before cpu
+	cpu=$(($(nproc) - 1))
+	lines_before=$(dmesg | wc -l)
+	stress-ng --cpu 1 --taskset "$cpu" --sched rr --sched-prio 1 -t 3 &
+	stress-ng --cpu 5 --taskset "$cpu" -t 3 &
+	wait
+	dmesg | tail -n +$((lines_before + 1)) | grep -q "rv: monitor stall does not allow event"
+}
+
+echo 5000 > $THRESHOLD
+echo 1 > monitors/stall/enable
+echo printk > monitors/stall/reactors
+
+! load || false
+
+echo 0 > monitors/stall/enable
+echo 70 > $THRESHOLD
+echo 1 > monitors/stall/enable
+
+load
+
+echo nop > monitors/stall/reactors
+echo 0 > monitors/stall/enable
diff --git a/tools/testing/selftests/verification/test.d/rv_wwnr_printk.tc b/tools/testing/selftests/verification/test.d/rv_wwnr_printk.tc
new file mode 100644
index 000000000..17e1edfb3
--- /dev/null
+++ b/tools/testing/selftests/verification/test.d/rv_wwnr_printk.tc
@@ -0,0 +1,52 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-or-later
+# description: Test wwnr monitor with printk reactor
+# requires: available_reactors wwnr:monitor printk:reactor stress-ng:program
+
+load() { # returns true if there was a reaction
+	local lines_before num load_pid ret
+	num=$((($(nproc) + 1) / 2))
+	lines_before=$(dmesg | wc -l)
+	stress-ng --cpu-sched "$num" --timer "$num" -t 5 -q &
+	load_pid=$!
+	timeout 5 dmesg -w | tail -n +$((lines_before + 1)) | \
+		grep -m 1 -q "rv: monitor wwnr does not allow event"
+	ret=$?
+	kill "$load_pid" || true
+	wait "$load_pid" || true
+	return $ret
+}
+
+# loads may flood the ringbuffer, wait for all pending printks (timeout at 2 minutes)
+wait_dmesg_flush() {
+	local last_before last_after
+	for _ in $(seq 400); do
+		last_before=$last_after
+		last_after=$(dmesg | grep "rv:" | tail -n 1 || true)
+		[ "$last_before" = "$last_after" ] && return 0
+		sleep .3
+	done
+	return 1
+}
+
+echo 1 > monitors/wwnr/enable
+echo printk > monitors/wwnr/reactors
+
+load
+
+echo 0 > monitoring_on
+wait_dmesg_flush
+
+! load || false
+echo 1 > monitoring_on
+
+load
+
+echo 0 > reacting_on
+wait_dmesg_flush
+
+! load || false
+echo 1 > reacting_on
+
+echo nop > monitors/wwnr/reactors
+echo 0 > monitors/wwnr/enable
diff --git a/tools/testing/selftests/verification/verificationtest-ktap b/tools/testing/selftests/verification/verificationtest-ktap
new file mode 100755
index 000000000..18f7fe324
--- /dev/null
+++ b/tools/testing/selftests/verification/verificationtest-ktap
@@ -0,0 +1,8 @@
+#!/bin/sh -e
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# ftracetest-ktap: Wrapper to integrate ftracetest with the kselftest runner
+#
+# Copyright (C) Arm Ltd., 2023
+
+../ftrace/ftracetest -K -v --rv ../verification