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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/gem/selftests/i915_gem_coherency.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip
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/gem/selftests/i915_gem_coherency.c')
-rw-r--r--drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c436
1 files changed, 436 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
new file mode 100644
index 000000000..c228fe4ab
--- /dev/null
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
@@ -0,0 +1,436 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright © 2017 Intel Corporation
+ */
+
+#include <linux/prime_numbers.h>
+
+#include "gt/intel_engine_pm.h"
+#include "gt/intel_gpu_commands.h"
+#include "gt/intel_gt.h"
+#include "gt/intel_gt_pm.h"
+#include "gt/intel_ring.h"
+
+#include "i915_selftest.h"
+#include "selftests/i915_random.h"
+
+struct context {
+ struct drm_i915_gem_object *obj;
+ struct intel_engine_cs *engine;
+};
+
+static int cpu_set(struct context *ctx, unsigned long offset, u32 v)
+{
+ unsigned int needs_clflush;
+ struct page *page;
+ void *map;
+ u32 *cpu;
+ int err;
+
+ i915_gem_object_lock(ctx->obj, NULL);
+ err = i915_gem_object_prepare_write(ctx->obj, &needs_clflush);
+ if (err)
+ goto out;
+
+ page = i915_gem_object_get_page(ctx->obj, offset >> PAGE_SHIFT);
+ map = kmap_atomic(page);
+ cpu = map + offset_in_page(offset);
+
+ if (needs_clflush & CLFLUSH_BEFORE)
+ drm_clflush_virt_range(cpu, sizeof(*cpu));
+
+ *cpu = v;
+
+ if (needs_clflush & CLFLUSH_AFTER)
+ drm_clflush_virt_range(cpu, sizeof(*cpu));
+
+ kunmap_atomic(map);
+ i915_gem_object_finish_access(ctx->obj);
+
+out:
+ i915_gem_object_unlock(ctx->obj);
+ return err;
+}
+
+static int cpu_get(struct context *ctx, unsigned long offset, u32 *v)
+{
+ unsigned int needs_clflush;
+ struct page *page;
+ void *map;
+ u32 *cpu;
+ int err;
+
+ i915_gem_object_lock(ctx->obj, NULL);
+ err = i915_gem_object_prepare_read(ctx->obj, &needs_clflush);
+ if (err)
+ goto out;
+
+ page = i915_gem_object_get_page(ctx->obj, offset >> PAGE_SHIFT);
+ map = kmap_atomic(page);
+ cpu = map + offset_in_page(offset);
+
+ if (needs_clflush & CLFLUSH_BEFORE)
+ drm_clflush_virt_range(cpu, sizeof(*cpu));
+
+ *v = *cpu;
+
+ kunmap_atomic(map);
+ i915_gem_object_finish_access(ctx->obj);
+
+out:
+ i915_gem_object_unlock(ctx->obj);
+ return err;
+}
+
+static int gtt_set(struct context *ctx, unsigned long offset, u32 v)
+{
+ struct i915_vma *vma;
+ u32 __iomem *map;
+ int err = 0;
+
+ i915_gem_object_lock(ctx->obj, NULL);
+ err = i915_gem_object_set_to_gtt_domain(ctx->obj, true);
+ i915_gem_object_unlock(ctx->obj);
+ if (err)
+ return err;
+
+ vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, PIN_MAPPABLE);
+ if (IS_ERR(vma))
+ return PTR_ERR(vma);
+
+ intel_gt_pm_get(vma->vm->gt);
+
+ map = i915_vma_pin_iomap(vma);
+ i915_vma_unpin(vma);
+ if (IS_ERR(map)) {
+ err = PTR_ERR(map);
+ goto out_rpm;
+ }
+
+ iowrite32(v, &map[offset / sizeof(*map)]);
+ i915_vma_unpin_iomap(vma);
+
+out_rpm:
+ intel_gt_pm_put(vma->vm->gt);
+ return err;
+}
+
+static int gtt_get(struct context *ctx, unsigned long offset, u32 *v)
+{
+ struct i915_vma *vma;
+ u32 __iomem *map;
+ int err = 0;
+
+ i915_gem_object_lock(ctx->obj, NULL);
+ err = i915_gem_object_set_to_gtt_domain(ctx->obj, false);
+ i915_gem_object_unlock(ctx->obj);
+ if (err)
+ return err;
+
+ vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, PIN_MAPPABLE);
+ if (IS_ERR(vma))
+ return PTR_ERR(vma);
+
+ intel_gt_pm_get(vma->vm->gt);
+
+ map = i915_vma_pin_iomap(vma);
+ i915_vma_unpin(vma);
+ if (IS_ERR(map)) {
+ err = PTR_ERR(map);
+ goto out_rpm;
+ }
+
+ *v = ioread32(&map[offset / sizeof(*map)]);
+ i915_vma_unpin_iomap(vma);
+
+out_rpm:
+ intel_gt_pm_put(vma->vm->gt);
+ return err;
+}
+
+static int wc_set(struct context *ctx, unsigned long offset, u32 v)
+{
+ u32 *map;
+ int err;
+
+ i915_gem_object_lock(ctx->obj, NULL);
+ err = i915_gem_object_set_to_wc_domain(ctx->obj, true);
+ i915_gem_object_unlock(ctx->obj);
+ if (err)
+ return err;
+
+ map = i915_gem_object_pin_map_unlocked(ctx->obj, I915_MAP_WC);
+ if (IS_ERR(map))
+ return PTR_ERR(map);
+
+ map[offset / sizeof(*map)] = v;
+
+ __i915_gem_object_flush_map(ctx->obj, offset, sizeof(*map));
+ i915_gem_object_unpin_map(ctx->obj);
+
+ return 0;
+}
+
+static int wc_get(struct context *ctx, unsigned long offset, u32 *v)
+{
+ u32 *map;
+ int err;
+
+ i915_gem_object_lock(ctx->obj, NULL);
+ err = i915_gem_object_set_to_wc_domain(ctx->obj, false);
+ i915_gem_object_unlock(ctx->obj);
+ if (err)
+ return err;
+
+ map = i915_gem_object_pin_map_unlocked(ctx->obj, I915_MAP_WC);
+ if (IS_ERR(map))
+ return PTR_ERR(map);
+
+ *v = map[offset / sizeof(*map)];
+ i915_gem_object_unpin_map(ctx->obj);
+
+ return 0;
+}
+
+static int gpu_set(struct context *ctx, unsigned long offset, u32 v)
+{
+ struct i915_request *rq;
+ struct i915_vma *vma;
+ u32 *cs;
+ int err;
+
+ vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, 0);
+ if (IS_ERR(vma))
+ return PTR_ERR(vma);
+
+ i915_gem_object_lock(ctx->obj, NULL);
+ err = i915_gem_object_set_to_gtt_domain(ctx->obj, true);
+ if (err)
+ goto out_unlock;
+
+ rq = intel_engine_create_kernel_request(ctx->engine);
+ if (IS_ERR(rq)) {
+ err = PTR_ERR(rq);
+ goto out_unpin;
+ }
+
+ cs = intel_ring_begin(rq, 4);
+ if (IS_ERR(cs)) {
+ err = PTR_ERR(cs);
+ goto out_rq;
+ }
+
+ if (GRAPHICS_VER(ctx->engine->i915) >= 8) {
+ *cs++ = MI_STORE_DWORD_IMM_GEN4 | 1 << 22;
+ *cs++ = lower_32_bits(i915_ggtt_offset(vma) + offset);
+ *cs++ = upper_32_bits(i915_ggtt_offset(vma) + offset);
+ *cs++ = v;
+ } else if (GRAPHICS_VER(ctx->engine->i915) >= 4) {
+ *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT;
+ *cs++ = 0;
+ *cs++ = i915_ggtt_offset(vma) + offset;
+ *cs++ = v;
+ } else {
+ *cs++ = MI_STORE_DWORD_IMM | MI_MEM_VIRTUAL;
+ *cs++ = i915_ggtt_offset(vma) + offset;
+ *cs++ = v;
+ *cs++ = MI_NOOP;
+ }
+ intel_ring_advance(rq, cs);
+
+ err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
+
+out_rq:
+ i915_request_add(rq);
+out_unpin:
+ i915_vma_unpin(vma);
+out_unlock:
+ i915_gem_object_unlock(ctx->obj);
+
+ return err;
+}
+
+static bool always_valid(struct context *ctx)
+{
+ return true;
+}
+
+static bool needs_fence_registers(struct context *ctx)
+{
+ struct intel_gt *gt = ctx->engine->gt;
+
+ if (intel_gt_is_wedged(gt))
+ return false;
+
+ return gt->ggtt->num_fences;
+}
+
+static bool needs_mi_store_dword(struct context *ctx)
+{
+ if (intel_gt_is_wedged(ctx->engine->gt))
+ return false;
+
+ return intel_engine_can_store_dword(ctx->engine);
+}
+
+static const struct igt_coherency_mode {
+ const char *name;
+ int (*set)(struct context *ctx, unsigned long offset, u32 v);
+ int (*get)(struct context *ctx, unsigned long offset, u32 *v);
+ bool (*valid)(struct context *ctx);
+} igt_coherency_mode[] = {
+ { "cpu", cpu_set, cpu_get, always_valid },
+ { "gtt", gtt_set, gtt_get, needs_fence_registers },
+ { "wc", wc_set, wc_get, always_valid },
+ { "gpu", gpu_set, NULL, needs_mi_store_dword },
+ { },
+};
+
+static struct intel_engine_cs *
+random_engine(struct drm_i915_private *i915, struct rnd_state *prng)
+{
+ struct intel_engine_cs *engine;
+ unsigned int count;
+
+ count = 0;
+ for_each_uabi_engine(engine, i915)
+ count++;
+
+ count = i915_prandom_u32_max_state(count, prng);
+ for_each_uabi_engine(engine, i915)
+ if (count-- == 0)
+ return engine;
+
+ return NULL;
+}
+
+static int igt_gem_coherency(void *arg)
+{
+ const unsigned int ncachelines = PAGE_SIZE/64;
+ struct drm_i915_private *i915 = arg;
+ const struct igt_coherency_mode *read, *write, *over;
+ unsigned long count, n;
+ u32 *offsets, *values;
+ I915_RND_STATE(prng);
+ struct context ctx;
+ int err = 0;
+
+ /*
+ * We repeatedly write, overwrite and read from a sequence of
+ * cachelines in order to try and detect incoherency (unflushed writes
+ * from either the CPU or GPU). Each setter/getter uses our cache
+ * domain API which should prevent incoherency.
+ */
+
+ offsets = kmalloc_array(ncachelines, 2*sizeof(u32), GFP_KERNEL);
+ if (!offsets)
+ return -ENOMEM;
+ for (count = 0; count < ncachelines; count++)
+ offsets[count] = count * 64 + 4 * (count % 16);
+
+ values = offsets + ncachelines;
+
+ ctx.engine = random_engine(i915, &prng);
+ if (!ctx.engine) {
+ err = -ENODEV;
+ goto out_free;
+ }
+ pr_info("%s: using %s\n", __func__, ctx.engine->name);
+ intel_engine_pm_get(ctx.engine);
+
+ for (over = igt_coherency_mode; over->name; over++) {
+ if (!over->set)
+ continue;
+
+ if (!over->valid(&ctx))
+ continue;
+
+ for (write = igt_coherency_mode; write->name; write++) {
+ if (!write->set)
+ continue;
+
+ if (!write->valid(&ctx))
+ continue;
+
+ for (read = igt_coherency_mode; read->name; read++) {
+ if (!read->get)
+ continue;
+
+ if (!read->valid(&ctx))
+ continue;
+
+ for_each_prime_number_from(count, 1, ncachelines) {
+ ctx.obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
+ if (IS_ERR(ctx.obj)) {
+ err = PTR_ERR(ctx.obj);
+ goto out_pm;
+ }
+
+ i915_random_reorder(offsets, ncachelines, &prng);
+ for (n = 0; n < count; n++)
+ values[n] = prandom_u32_state(&prng);
+
+ for (n = 0; n < count; n++) {
+ err = over->set(&ctx, offsets[n], ~values[n]);
+ if (err) {
+ pr_err("Failed to set stale value[%ld/%ld] in object using %s, err=%d\n",
+ n, count, over->name, err);
+ goto put_object;
+ }
+ }
+
+ for (n = 0; n < count; n++) {
+ err = write->set(&ctx, offsets[n], values[n]);
+ if (err) {
+ pr_err("Failed to set value[%ld/%ld] in object using %s, err=%d\n",
+ n, count, write->name, err);
+ goto put_object;
+ }
+ }
+
+ for (n = 0; n < count; n++) {
+ u32 found;
+
+ err = read->get(&ctx, offsets[n], &found);
+ if (err) {
+ pr_err("Failed to get value[%ld/%ld] in object using %s, err=%d\n",
+ n, count, read->name, err);
+ goto put_object;
+ }
+
+ if (found != values[n]) {
+ pr_err("Value[%ld/%ld] mismatch, (overwrite with %s) wrote [%s] %x read [%s] %x (inverse %x), at offset %x\n",
+ n, count, over->name,
+ write->name, values[n],
+ read->name, found,
+ ~values[n], offsets[n]);
+ err = -EINVAL;
+ goto put_object;
+ }
+ }
+
+ i915_gem_object_put(ctx.obj);
+ }
+ }
+ }
+ }
+out_pm:
+ intel_engine_pm_put(ctx.engine);
+out_free:
+ kfree(offsets);
+ return err;
+
+put_object:
+ i915_gem_object_put(ctx.obj);
+ goto out_pm;
+}
+
+int i915_gem_coherency_live_selftests(struct drm_i915_private *i915)
+{
+ static const struct i915_subtest tests[] = {
+ SUBTEST(igt_gem_coherency),
+ };
+
+ return i915_live_subtests(tests, i915);
+}