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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/gpu/drm/i915/gt/selftest_engine_pm.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
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Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ...
Diffstat (limited to 'drivers/gpu/drm/i915/gt/selftest_engine_pm.c')
-rw-r--r--drivers/gpu/drm/i915/gt/selftest_engine_pm.c423
1 files changed, 423 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_pm.c b/drivers/gpu/drm/i915/gt/selftest_engine_pm.c
new file mode 100644
index 000000000..87c94314c
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/selftest_engine_pm.c
@@ -0,0 +1,423 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright © 2018 Intel Corporation
+ */
+
+#include <linux/sort.h>
+
+#include "i915_selftest.h"
+#include "intel_engine_regs.h"
+#include "intel_gpu_commands.h"
+#include "intel_gt_clock_utils.h"
+#include "selftest_engine.h"
+#include "selftest_engine_heartbeat.h"
+#include "selftests/igt_atomic.h"
+#include "selftests/igt_flush_test.h"
+#include "selftests/igt_spinner.h"
+
+#define COUNT 5
+
+static int cmp_u64(const void *A, const void *B)
+{
+ const u64 *a = A, *b = B;
+
+ return *a - *b;
+}
+
+static u64 trifilter(u64 *a)
+{
+ sort(a, COUNT, sizeof(*a), cmp_u64, NULL);
+ return (a[1] + 2 * a[2] + a[3]) >> 2;
+}
+
+static u32 *emit_wait(u32 *cs, u32 offset, int op, u32 value)
+{
+ *cs++ = MI_SEMAPHORE_WAIT |
+ MI_SEMAPHORE_GLOBAL_GTT |
+ MI_SEMAPHORE_POLL |
+ op;
+ *cs++ = value;
+ *cs++ = offset;
+ *cs++ = 0;
+
+ return cs;
+}
+
+static u32 *emit_store(u32 *cs, u32 offset, u32 value)
+{
+ *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT;
+ *cs++ = offset;
+ *cs++ = 0;
+ *cs++ = value;
+
+ return cs;
+}
+
+static u32 *emit_srm(u32 *cs, i915_reg_t reg, u32 offset)
+{
+ *cs++ = MI_STORE_REGISTER_MEM_GEN8 | MI_USE_GGTT;
+ *cs++ = i915_mmio_reg_offset(reg);
+ *cs++ = offset;
+ *cs++ = 0;
+
+ return cs;
+}
+
+static void write_semaphore(u32 *x, u32 value)
+{
+ WRITE_ONCE(*x, value);
+ wmb();
+}
+
+static int __measure_timestamps(struct intel_context *ce,
+ u64 *dt, u64 *d_ring, u64 *d_ctx)
+{
+ struct intel_engine_cs *engine = ce->engine;
+ u32 *sema = memset32(engine->status_page.addr + 1000, 0, 5);
+ u32 offset = i915_ggtt_offset(engine->status_page.vma);
+ struct i915_request *rq;
+ u32 *cs;
+
+ rq = intel_context_create_request(ce);
+ if (IS_ERR(rq))
+ return PTR_ERR(rq);
+
+ cs = intel_ring_begin(rq, 28);
+ if (IS_ERR(cs)) {
+ i915_request_add(rq);
+ return PTR_ERR(cs);
+ }
+
+ /* Signal & wait for start */
+ cs = emit_store(cs, offset + 4008, 1);
+ cs = emit_wait(cs, offset + 4008, MI_SEMAPHORE_SAD_NEQ_SDD, 1);
+
+ cs = emit_srm(cs, RING_TIMESTAMP(engine->mmio_base), offset + 4000);
+ cs = emit_srm(cs, RING_CTX_TIMESTAMP(engine->mmio_base), offset + 4004);
+
+ /* Busy wait */
+ cs = emit_wait(cs, offset + 4008, MI_SEMAPHORE_SAD_EQ_SDD, 1);
+
+ cs = emit_srm(cs, RING_TIMESTAMP(engine->mmio_base), offset + 4016);
+ cs = emit_srm(cs, RING_CTX_TIMESTAMP(engine->mmio_base), offset + 4012);
+
+ intel_ring_advance(rq, cs);
+ i915_request_get(rq);
+ i915_request_add(rq);
+ intel_engine_flush_submission(engine);
+
+ /* Wait for the request to start executing, that then waits for us */
+ while (READ_ONCE(sema[2]) == 0)
+ cpu_relax();
+
+ /* Run the request for a 100us, sampling timestamps before/after */
+ local_irq_disable();
+ write_semaphore(&sema[2], 0);
+ while (READ_ONCE(sema[1]) == 0) /* wait for the gpu to catch up */
+ cpu_relax();
+ *dt = local_clock();
+ udelay(100);
+ *dt = local_clock() - *dt;
+ write_semaphore(&sema[2], 1);
+ local_irq_enable();
+
+ if (i915_request_wait(rq, 0, HZ / 2) < 0) {
+ i915_request_put(rq);
+ return -ETIME;
+ }
+ i915_request_put(rq);
+
+ pr_debug("%s CTX_TIMESTAMP: [%x, %x], RING_TIMESTAMP: [%x, %x]\n",
+ engine->name, sema[1], sema[3], sema[0], sema[4]);
+
+ *d_ctx = sema[3] - sema[1];
+ *d_ring = sema[4] - sema[0];
+ return 0;
+}
+
+static int __live_engine_timestamps(struct intel_engine_cs *engine)
+{
+ u64 s_ring[COUNT], s_ctx[COUNT], st[COUNT], d_ring, d_ctx, dt;
+ struct intel_context *ce;
+ int i, err = 0;
+
+ ce = intel_context_create(engine);
+ if (IS_ERR(ce))
+ return PTR_ERR(ce);
+
+ for (i = 0; i < COUNT; i++) {
+ err = __measure_timestamps(ce, &st[i], &s_ring[i], &s_ctx[i]);
+ if (err)
+ break;
+ }
+ intel_context_put(ce);
+ if (err)
+ return err;
+
+ dt = trifilter(st);
+ d_ring = trifilter(s_ring);
+ d_ctx = trifilter(s_ctx);
+
+ pr_info("%s elapsed:%lldns, CTX_TIMESTAMP:%lldns, RING_TIMESTAMP:%lldns\n",
+ engine->name, dt,
+ intel_gt_clock_interval_to_ns(engine->gt, d_ctx),
+ intel_gt_clock_interval_to_ns(engine->gt, d_ring));
+
+ d_ring = intel_gt_clock_interval_to_ns(engine->gt, d_ring);
+ if (3 * dt > 4 * d_ring || 4 * dt < 3 * d_ring) {
+ pr_err("%s Mismatch between ring timestamp and walltime!\n",
+ engine->name);
+ return -EINVAL;
+ }
+
+ d_ring = trifilter(s_ring);
+ d_ctx = trifilter(s_ctx);
+
+ d_ctx *= engine->gt->clock_frequency;
+ if (GRAPHICS_VER(engine->i915) == 11)
+ d_ring *= 12500000; /* Fixed 80ns for GEN11 ctx timestamp? */
+ else
+ d_ring *= engine->gt->clock_frequency;
+
+ if (3 * d_ctx > 4 * d_ring || 4 * d_ctx < 3 * d_ring) {
+ pr_err("%s Mismatch between ring and context timestamps!\n",
+ engine->name);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int live_engine_timestamps(void *arg)
+{
+ struct intel_gt *gt = arg;
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+
+ /*
+ * Check that CS_TIMESTAMP / CTX_TIMESTAMP are in sync, i.e. share
+ * the same CS clock.
+ */
+
+ if (GRAPHICS_VER(gt->i915) < 8)
+ return 0;
+
+ for_each_engine(engine, gt, id) {
+ int err;
+
+ st_engine_heartbeat_disable(engine);
+ err = __live_engine_timestamps(engine);
+ st_engine_heartbeat_enable(engine);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int __spin_until_busier(struct intel_engine_cs *engine, ktime_t busyness)
+{
+ ktime_t start, unused, dt;
+
+ if (!intel_engine_uses_guc(engine))
+ return 0;
+
+ /*
+ * In GuC mode of submission, the busyness stats may get updated after
+ * the batch starts running. Poll for a change in busyness and timeout
+ * after 500 us.
+ */
+ start = ktime_get();
+ while (intel_engine_get_busy_time(engine, &unused) == busyness) {
+ dt = ktime_get() - start;
+ if (dt > 10000000) {
+ pr_err("active wait timed out %lld\n", dt);
+ ENGINE_TRACE(engine, "active wait time out %lld\n", dt);
+ return -ETIME;
+ }
+ }
+
+ return 0;
+}
+
+static int live_engine_busy_stats(void *arg)
+{
+ struct intel_gt *gt = arg;
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+ struct igt_spinner spin;
+ int err = 0;
+
+ /*
+ * Check that if an engine supports busy-stats, they tell the truth.
+ */
+
+ if (igt_spinner_init(&spin, gt))
+ return -ENOMEM;
+
+ GEM_BUG_ON(intel_gt_pm_is_awake(gt));
+ for_each_engine(engine, gt, id) {
+ struct i915_request *rq;
+ ktime_t busyness, dummy;
+ ktime_t de, dt;
+ ktime_t t[2];
+
+ if (!intel_engine_supports_stats(engine))
+ continue;
+
+ if (!intel_engine_can_store_dword(engine))
+ continue;
+
+ if (intel_gt_pm_wait_for_idle(gt)) {
+ err = -EBUSY;
+ break;
+ }
+
+ st_engine_heartbeat_disable(engine);
+
+ ENGINE_TRACE(engine, "measuring idle time\n");
+ preempt_disable();
+ de = intel_engine_get_busy_time(engine, &t[0]);
+ udelay(100);
+ de = ktime_sub(intel_engine_get_busy_time(engine, &t[1]), de);
+ preempt_enable();
+ dt = ktime_sub(t[1], t[0]);
+ if (de < 0 || de > 10) {
+ pr_err("%s: reported %lldns [%d%%] busyness while sleeping [for %lldns]\n",
+ engine->name,
+ de, (int)div64_u64(100 * de, dt), dt);
+ GEM_TRACE_DUMP();
+ err = -EINVAL;
+ goto end;
+ }
+
+ /* 100% busy */
+ rq = igt_spinner_create_request(&spin,
+ engine->kernel_context,
+ MI_NOOP);
+ if (IS_ERR(rq)) {
+ err = PTR_ERR(rq);
+ goto end;
+ }
+ i915_request_add(rq);
+
+ busyness = intel_engine_get_busy_time(engine, &dummy);
+ if (!igt_wait_for_spinner(&spin, rq)) {
+ intel_gt_set_wedged(engine->gt);
+ err = -ETIME;
+ goto end;
+ }
+
+ err = __spin_until_busier(engine, busyness);
+ if (err) {
+ GEM_TRACE_DUMP();
+ goto end;
+ }
+
+ ENGINE_TRACE(engine, "measuring busy time\n");
+ preempt_disable();
+ de = intel_engine_get_busy_time(engine, &t[0]);
+ mdelay(100);
+ de = ktime_sub(intel_engine_get_busy_time(engine, &t[1]), de);
+ preempt_enable();
+ dt = ktime_sub(t[1], t[0]);
+ if (100 * de < 95 * dt || 95 * de > 100 * dt) {
+ pr_err("%s: reported %lldns [%d%%] busyness while spinning [for %lldns]\n",
+ engine->name,
+ de, (int)div64_u64(100 * de, dt), dt);
+ GEM_TRACE_DUMP();
+ err = -EINVAL;
+ goto end;
+ }
+
+end:
+ st_engine_heartbeat_enable(engine);
+ igt_spinner_end(&spin);
+ if (igt_flush_test(gt->i915))
+ err = -EIO;
+ if (err)
+ break;
+ }
+
+ igt_spinner_fini(&spin);
+ if (igt_flush_test(gt->i915))
+ err = -EIO;
+ return err;
+}
+
+static int live_engine_pm(void *arg)
+{
+ struct intel_gt *gt = arg;
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+
+ /*
+ * Check we can call intel_engine_pm_put from any context. No
+ * failures are reported directly, but if we mess up lockdep should
+ * tell us.
+ */
+ if (intel_gt_pm_wait_for_idle(gt)) {
+ pr_err("Unable to flush GT pm before test\n");
+ return -EBUSY;
+ }
+
+ GEM_BUG_ON(intel_gt_pm_is_awake(gt));
+ for_each_engine(engine, gt, id) {
+ const typeof(*igt_atomic_phases) *p;
+
+ for (p = igt_atomic_phases; p->name; p++) {
+ /*
+ * Acquisition is always synchronous, except if we
+ * know that the engine is already awake, in which
+ * case we should use intel_engine_pm_get_if_awake()
+ * to atomically grab the wakeref.
+ *
+ * In practice,
+ * intel_engine_pm_get();
+ * intel_engine_pm_put();
+ * occurs in one thread, while simultaneously
+ * intel_engine_pm_get_if_awake();
+ * intel_engine_pm_put();
+ * occurs from atomic context in another.
+ */
+ GEM_BUG_ON(intel_engine_pm_is_awake(engine));
+ intel_engine_pm_get(engine);
+
+ p->critical_section_begin();
+ if (!intel_engine_pm_get_if_awake(engine))
+ pr_err("intel_engine_pm_get_if_awake(%s) failed under %s\n",
+ engine->name, p->name);
+ else
+ intel_engine_pm_put_async(engine);
+ intel_engine_pm_put_async(engine);
+ p->critical_section_end();
+
+ intel_engine_pm_flush(engine);
+
+ if (intel_engine_pm_is_awake(engine)) {
+ pr_err("%s is still awake after flushing pm\n",
+ engine->name);
+ return -EINVAL;
+ }
+
+ /* gt wakeref is async (deferred to workqueue) */
+ if (intel_gt_pm_wait_for_idle(gt)) {
+ pr_err("GT failed to idle\n");
+ return -EINVAL;
+ }
+ }
+ }
+
+ return 0;
+}
+
+int live_engine_pm_selftests(struct intel_gt *gt)
+{
+ static const struct i915_subtest tests[] = {
+ SUBTEST(live_engine_timestamps),
+ SUBTEST(live_engine_busy_stats),
+ SUBTEST(live_engine_pm),
+ };
+
+ return intel_gt_live_subtests(tests, gt);
+}