From: Lionel Landwerlin <lionel.g.landwer...@intel.com>

Verify that the per-context dynamic SSEU uAPI works as expected.

v2: Add subslice tests (Lionel)
    Use MI_SET_PREDICATE for further verification when available (Lionel)

v3: Rename to gem_ctx_rpcs (Lionel)

v4: Update kernel API (Lionel)
    Add 0 value test (Lionel)
    Exercise invalid values (Lionel)

v5: Add perf tests (Lionel)

v6: Add new sysfs entry tests (Lionel)

v7: Test rsvd fields
    Update for kernel series changes

v8: Drop test_no_sseu_support() test (Kelvin)
    Drop drm_intel_*() apis (Chris)

v9: by Chris:
    Drop all do_ioctl/do_ioctl_err()
    Use gem_context_[gs]et_param()
    Use gem_read() instead of mapping memory
    by Lionel:
    Test dynamic sseu on/off more

Tvrtko Ursulin:

v10:
 * Various style tweaks and refactorings.
 * New test coverage.

v11:
 * Change platform support to just Gen11.
 * Simplify availability test. (Chris Wilson)
 * More invalid pointer tests. (Chris Wilson)

v12:
 * Fix MAP_FIXED use (doh!).
 * Fix get/set copy&paste errors.
 * Drop supported platform test. (Chris Wilson)
 * Add mmap__gtt test. (Chris Wilson)

v13:
 * Commit message tweaks.
 * Added reset/hang/suspend tests. (Chris Wilson)
 * Assert spinner is busy. (Chris Wilson)
 * Remove some more ABI assumptions. (Chris Wilson)

v14:
 * Use default resume time. (Chris Wilson)
 * Trigger hang after rpcs read batch has been submitted. (Chris Wilson)

v15:
 * Adjust for uAPI restrictions.

v16:
 * Build system changes.

v17:
 * Remove all subtests which read the RPCS register. (Joonas Lahtinen)

v18:
 * Tidy curly braces. (Joonas Lahtinen)

v19:
 * Check flags/rsvd MBZ.

v20:
 * Rebase for engine_class/engine_instance uapi change.

Signed-off-by: Lionel Landwerlin <lionel.g.landwer...@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
Reviewed-by: Chris Wilson <ch...@chris-wilson.co.uk> # v14
Reviewed-by: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
---
 tests/Makefile.am          |   1 +
 tests/Makefile.sources     |   3 +
 tests/i915/gem_ctx_param.c |   4 +-
 tests/i915/gem_ctx_sseu.c  | 541 +++++++++++++++++++++++++++++++++++++
 tests/meson.build          |   8 +
 5 files changed, 556 insertions(+), 1 deletion(-)
 create mode 100644 tests/i915/gem_ctx_sseu.c

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 48d77535b6bd..42463bde7f30 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -111,6 +111,7 @@ gem_close_race_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
 gem_close_race_LDADD = $(LDADD) -lpthread
 gem_ctx_thrash_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
 gem_ctx_thrash_LDADD = $(LDADD) -lpthread
+gem_ctx_sseu_LDADD = $(LDADD) $(top_builddir)/lib/libigt_perf.la
 gem_exec_capture_LDADD = $(LDADD) -lz
 gem_exec_parallel_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
 gem_exec_parallel_LDADD = $(LDADD) -lpthread
diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index eedde1e817cb..3dfeb5b67274 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -161,6 +161,9 @@ gem_ctx_isolation_SOURCES = i915/gem_ctx_isolation.c
 TESTS_progs += gem_ctx_param
 gem_ctx_param_SOURCES = i915/gem_ctx_param.c
 
+TESTS_progs += gem_ctx_sseu
+gem_ctx_sseu_SOURCES = i915/gem_ctx_sseu.c
+
 TESTS_progs += gem_ctx_switch
 gem_ctx_switch_SOURCES = i915/gem_ctx_switch.c
 
diff --git a/tests/i915/gem_ctx_param.c b/tests/i915/gem_ctx_param.c
index 0bbc5effbf9f..acc1e6297750 100644
--- a/tests/i915/gem_ctx_param.c
+++ b/tests/i915/gem_ctx_param.c
@@ -294,11 +294,13 @@ igt_main
                        set_priority(fd);
        }
 
+       /* I915_CONTEXT_PARAM_SSEU tests are located in gem_ctx_sseu.c */
+
        /* NOTE: This testcase intentionally tests for the next free parameter
         * to catch ABI extensions. Don't "fix" this testcase without adding all
         * the tests for the new param first.
         */
-       arg.param = I915_CONTEXT_PARAM_PRIORITY + 1;
+       arg.param = I915_CONTEXT_PARAM_SSEU + 1;
 
        igt_subtest("invalid-param-get") {
                arg.ctx_id = ctx;
diff --git a/tests/i915/gem_ctx_sseu.c b/tests/i915/gem_ctx_sseu.c
new file mode 100644
index 000000000000..16609bee61c8
--- /dev/null
+++ b/tests/i915/gem_ctx_sseu.c
@@ -0,0 +1,541 @@
+/*
+ * Copyright © 2017-2018 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Lionel Landwerlin <lionel.g.landwer...@intel.com>
+ *
+ */
+
+#include "igt.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <errno.h>
+#include <time.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+
+#include "igt_dummyload.h"
+#include "igt_perf.h"
+#include "igt_sysfs.h"
+#include "ioctl_wrappers.h"
+
+IGT_TEST_DESCRIPTION("Test context render powergating programming.");
+
+static unsigned int __intel_gen__, __intel_devid__;
+static uint64_t __slice_mask__, __subslice_mask__;
+static unsigned int __slice_count__, __subslice_count__;
+
+static uint64_t mask_minus_one(uint64_t mask)
+{
+       unsigned int i;
+
+       for (i = 0; i < (sizeof(mask) * 8 - 1); i++) {
+               if ((1ULL << i) & mask)
+                       return mask & ~(1ULL << i);
+       }
+
+       igt_assert(0);
+       return 0;
+}
+
+static uint64_t mask_plus_one(uint64_t mask)
+{
+       unsigned int i;
+
+       for (i = 0; i < (sizeof(mask) * 8 - 1); i++) {
+               if (((1ULL << i) & mask) == 0)
+                       return mask | (1ULL << i);
+       }
+
+       igt_assert(0);
+       return 0;
+}
+
+static uint64_t mask_minus(uint64_t mask, int n)
+{
+       unsigned int i;
+
+       for (i = 0; i < n; i++)
+               mask = mask_minus_one(mask);
+
+       return mask;
+}
+
+static uint64_t mask_plus(uint64_t mask, int n)
+{
+       unsigned int i;
+
+       for (i = 0; i < n; i++)
+               mask = mask_plus_one(mask);
+
+       return mask;
+}
+
+static bool
+kernel_has_per_context_sseu_support(int fd)
+{
+       struct drm_i915_gem_context_param_sseu sseu = { };
+       struct drm_i915_gem_context_param arg = {
+               .param = I915_CONTEXT_PARAM_SSEU,
+               .size = sizeof(sseu),
+               .value = to_user_pointer(&sseu),
+       };
+       int ret;
+
+       if (__gem_context_get_param(fd, &arg))
+               return false;
+
+       arg.value = to_user_pointer(&sseu);
+
+       ret = __gem_context_set_param(fd, &arg);
+
+       igt_assert(ret == 0 || ret == -ENODEV || ret == -EINVAL);
+
+       return ret == 0;
+}
+
+static bool has_engine(int fd, unsigned int class, unsigned int instance)
+{
+       int pmu = perf_i915_open(I915_PMU_ENGINE_BUSY(class, instance));
+
+       if (pmu >= 0)
+               close(pmu);
+
+       return pmu >= 0;
+}
+
+/*
+ * Verify that invalid engines are rejected and valid ones are accepted.
+ */
+static void test_engines(int fd)
+{
+       struct drm_i915_gem_context_param_sseu sseu = { };
+       struct drm_i915_gem_context_param arg = {
+               .param = I915_CONTEXT_PARAM_SSEU,
+               .ctx_id = gem_context_create(fd),
+               .size = sizeof(sseu),
+               .value = to_user_pointer(&sseu)
+       };
+       unsigned int class, instance;
+       int last_with_engines;
+
+       /* get_param */
+
+       sseu.engine_instance = -1; /* Assumed invalid. */
+       igt_assert_eq(__gem_context_get_param(fd, &arg), -EINVAL);
+
+       sseu.engine_class = I915_ENGINE_CLASS_INVALID; /* Both invalid. */
+       igt_assert_eq(__gem_context_get_param(fd, &arg), -EINVAL);
+
+       sseu.engine_instance = 0; /* Class invalid. */
+       igt_assert_eq(__gem_context_get_param(fd, &arg), -EINVAL);
+       sseu.engine_class = I915_ENGINE_CLASS_RENDER;
+
+       last_with_engines = -1;
+       for (class = 0; class < ~0; class++) {
+               for (instance = 0; instance < ~0; instance++) {
+                       int ret;
+
+                       sseu.engine_class = class;
+                       sseu.engine_instance = instance;
+
+                       ret = __gem_context_get_param(fd, &arg);
+
+                       if (has_engine(fd, class, instance)) {
+                               igt_assert_eq(ret, 0);
+                               last_with_engines = class;
+                       } else {
+                               igt_assert_eq(ret, -EINVAL);
+                               if (instance > 8) /* Skip over some instance 
holes. */
+                                       break;
+                       }
+               }
+
+               if (class - last_with_engines > 8) /* Skip over some class 
holes. */
+                       break;
+       }
+
+       /*
+        * Get some proper values before trying to reprogram them onto
+        * an invalid engine.
+        */
+       sseu.engine_class = 0;
+       sseu.engine_instance = 0;
+       gem_context_get_param(fd, &arg);
+
+       /* set_param */
+
+       sseu.engine_instance = -1; /* Assumed invalid. */
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+
+       sseu.engine_class = I915_ENGINE_CLASS_INVALID; /* Both invalid. */
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+
+       sseu.engine_instance = 0; /* Class invalid. */
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+
+       last_with_engines = -1;
+       for (class = 0; class < ~0; class++) {
+               for (instance = 0; instance < ~0; instance++) {
+                       int ret;
+
+                       sseu.engine_class = class;
+                       sseu.engine_instance = instance;
+
+                       ret = __gem_context_set_param(fd, &arg);
+
+                       if (has_engine(fd, class, instance)) {
+                               igt_assert(ret == 0 || ret == -ENODEV);
+                               last_with_engines = class;
+                       } else {
+                               igt_assert_eq(ret, -EINVAL);
+                               if (instance > 8) /* Skip over some instance 
holes. */
+                                       break;
+                       }
+               }
+
+               if (class - last_with_engines > 8) /* Skip over some class 
holes. */
+                       break;
+       }
+
+       gem_context_destroy(fd, arg.ctx_id);
+}
+
+/*
+ * Verify that invalid arguments are rejected.
+ */
+static void
+test_invalid_args(int fd)
+{
+       struct drm_i915_gem_context_param arg = {
+               .param = I915_CONTEXT_PARAM_SSEU,
+               .ctx_id = gem_context_create(fd),
+       };
+       struct drm_i915_gem_context_param_sseu sseu = { };
+       unsigned char *page[2];
+       unsigned char *addr;
+       unsigned int sz;
+
+       /* get param */
+
+       /* Invalid size. */
+       arg.size = 1;
+       igt_assert_eq(__gem_context_get_param(fd, &arg), -EINVAL);
+
+       /* Query size. */
+       arg.size = 0;
+       igt_assert_eq(__gem_context_get_param(fd, &arg), 0);
+       sz = arg.size;
+
+       /* Bad pointers. */
+       igt_assert_eq(__gem_context_get_param(fd, &arg), -EFAULT);
+       arg.value = -1;
+       igt_assert_eq(__gem_context_get_param(fd, &arg), -EFAULT);
+       arg.value = 1;
+       igt_assert_eq(__gem_context_get_param(fd, &arg), -EFAULT);
+
+       /* Unmapped. */
+       page[0] = mmap(0, 4096, PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
+       igt_assert(page[0] != MAP_FAILED);
+       memset(page[0], 0, sizeof(sseu));
+       munmap(page[0], 4096);
+       arg.value = to_user_pointer(page[0]);
+       igt_assert_eq(__gem_context_get_param(fd, &arg), -EFAULT);
+
+       /* Straddle into unmapped area. */
+       page[0] = mmap(0, 8192, PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
+       igt_assert(page[0] != MAP_FAILED);
+       munmap(page[0], 8192);
+       page[0] = mmap(page[0], 4096,
+                      PROT_WRITE, MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0);
+       igt_assert(page[0] != MAP_FAILED);
+       memset(page[0], 0, sizeof(sseu));
+       page[1] = mmap((void *)((unsigned long)page[0] + 4096), 4096,
+                      PROT_WRITE, MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0);
+       igt_assert(page[1] != MAP_FAILED);
+       memset(page[1], 0, sizeof(sseu));
+       munmap(page[1], 4096);
+       arg.value = to_user_pointer(page[1]) -
+                   sizeof(struct drm_i915_gem_context_param_sseu) + 4;
+       igt_assert_eq(__gem_context_get_param(fd, &arg), -EFAULT);
+       munmap(page[0], 4096);
+
+       /* Straddle into read-only area. */
+       page[0] = mmap(0, 8192, PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
+       igt_assert(page[0] != MAP_FAILED);
+       munmap(page[0], 8192);
+       page[0] = mmap(page[0], 4096,
+                      PROT_WRITE, MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0);
+       igt_assert(page[0] != MAP_FAILED);
+       memset(page[0], 0, sizeof(sseu));
+       page[1] = mmap((void *)((unsigned long)page[0] + 4096), 4096,
+                      PROT_WRITE, MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0);
+       igt_assert(page[1] != MAP_FAILED);
+       memset(page[1], 0, sizeof(sseu));
+       igt_assert(mprotect(page[1], 4096, PROT_READ) == 0);
+       arg.value = to_user_pointer(page[1] - sizeof(sseu) + 4);
+       igt_assert_eq(__gem_context_get_param(fd, &arg), -EFAULT);
+       munmap(page[0], 4096);
+       munmap(page[1], 4096);
+
+       /* set param */
+
+       /* Invalid sizes. */
+       arg.size = 1;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+
+       arg.size = 0;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+       arg.size = sz;
+
+       /* Bad pointers. */
+       arg.value = 0;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EFAULT);
+       arg.value = -1;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EFAULT);
+       arg.value = 1;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EFAULT);
+
+       /* Get valid SSEU. */
+       arg.value = to_user_pointer(&sseu);
+       igt_assert_eq(__gem_context_get_param(fd, &arg), 0);
+
+       /* Invalid MBZ. */
+       sseu.flags = -1;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+       sseu.rsvd = -1;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+       sseu.flags = 0;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+       sseu.rsvd = 0;
+
+       /* Unmapped. */
+       page[0] = mmap(0, 4096, PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
+       igt_assert(page[0] != MAP_FAILED);
+       memcpy(page[0], &sseu, sizeof(sseu));
+       munmap(page[0], 4096);
+       arg.value = to_user_pointer(page[0]);
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EFAULT);
+
+       /* Straddle into unmapped area. */
+       page[0] = mmap(0, 8192, PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
+       igt_assert(page[0] != MAP_FAILED);
+       munmap(page[0], 8192);
+       page[0] = mmap(page[0], 4096,
+                      PROT_WRITE, MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0);
+       igt_assert(page[0] != MAP_FAILED);
+       page[1] = mmap((void *)((unsigned long)page[0] + 4096), 4096,
+                      PROT_WRITE, MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0);
+       igt_assert(page[1] != MAP_FAILED);
+       addr = page[1] - sizeof(sseu) + 4;
+       memcpy(addr, &sseu, sizeof(sseu));
+       munmap(page[1], 4096);
+       arg.value = to_user_pointer(addr);
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EFAULT);
+       munmap(page[0], 4096);
+
+       gem_context_destroy(fd, arg.ctx_id);
+}
+
+/*
+ * Verify that ggtt mapped area can be used as the sseu pointer.
+ */
+static void
+test_ggtt_args(int fd)
+{
+       struct drm_i915_gem_context_param_sseu *sseu;
+       struct drm_i915_gem_context_param arg = {
+               .param = I915_CONTEXT_PARAM_SSEU,
+               .ctx_id = gem_context_create(fd),
+               .size = sizeof(*sseu),
+       };
+       uint32_t bo;
+
+       bo = gem_create(fd, 4096);
+       arg.value = to_user_pointer(gem_mmap__gtt(fd, bo, 4096,
+                                                 PROT_READ | PROT_WRITE));
+
+       igt_assert_eq(__gem_context_get_param(fd, &arg), 0);
+       igt_assert_eq(__gem_context_set_param(fd, &arg), 0);
+
+       munmap((void *)arg.value, 4096);
+       gem_close(fd, bo);
+       gem_context_destroy(fd, arg.ctx_id);
+}
+
+/*
+ * Verify that invalid SSEU values are rejected.
+ */
+static void
+test_invalid_sseu(int fd)
+{
+       struct drm_i915_gem_context_param_sseu device_sseu = { };
+       struct drm_i915_gem_context_param_sseu sseu = { };
+       struct drm_i915_gem_context_param arg = {
+               .param = I915_CONTEXT_PARAM_SSEU,
+               .ctx_id = gem_context_create(fd),
+               .size = sizeof(sseu),
+       };
+       unsigned int i;
+
+       /* Fetch the device defaults. */
+       arg.value = to_user_pointer(&device_sseu);
+       gem_context_get_param(fd, &arg);
+
+       arg.value = to_user_pointer(&sseu);
+
+       /* Try all slice masks known to be invalid. */
+       sseu = device_sseu;
+       for (i = 1; i <= (8 - __slice_count__); i++) {
+               sseu.slice_mask = mask_plus(__slice_mask__, i);
+               igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+       }
+
+       /* 0 slices. */
+       sseu.slice_mask = 0;
+       igt_assert_eq(-EINVAL, __gem_context_set_param(fd, &arg));
+
+       /* Try all subslice masks known to be invalid. */
+       sseu = device_sseu;
+       for (i = 1; i <= (8 - __subslice_count__); i++) {
+               sseu.subslice_mask = mask_plus(__subslice_mask__, i);
+               igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+       }
+
+       /* 0 subslices. */
+       sseu.subslice_mask = 0;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+
+       /* Try number of EUs superior to the max available. */
+       sseu = device_sseu;
+       sseu.min_eus_per_subslice = device_sseu.max_eus_per_subslice + 1;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+
+       sseu = device_sseu;
+       sseu.max_eus_per_subslice = device_sseu.max_eus_per_subslice + 1;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+
+       /* Try to program 0 max EUs. */
+       sseu = device_sseu;
+       sseu.max_eus_per_subslice = 0;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+
+       /* Min > max */
+       sseu = device_sseu;
+       sseu.min_eus_per_subslice = sseu.max_eus_per_subslice;
+       sseu.max_eus_per_subslice = 1;
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+
+       if (__intel_gen__ != 11)
+               goto out;
+
+       /* Subset of subslices but slice mask greater than one. */
+       if (__slice_count__ > 1) {
+               sseu = device_sseu;
+               sseu.subslice_mask = mask_minus_one(sseu.subslice_mask);
+               igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+       }
+
+       /* Odd subslices above four. */
+       sseu = device_sseu;
+       sseu.slice_mask = 0x1;
+       sseu.subslice_mask = mask_minus_one(sseu.subslice_mask);
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+
+       /* More than half subslices with one slice. */
+       sseu = device_sseu;
+       sseu.slice_mask = 0x1;
+       sseu.subslice_mask = mask_minus(sseu.subslice_mask,
+                                       __subslice_count__ / 2 - 1);
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+
+       /* VME */
+
+       /* Slice count between one and max. */
+       if (__slice_count__ > 2) {
+               sseu = device_sseu;
+               sseu.slice_mask = mask_minus_one(sseu.slice_mask);
+               igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+       }
+
+       /* Less than half subslices with one slice. */
+       sseu = device_sseu;
+       sseu.slice_mask = 0x1;
+       sseu.subslice_mask = mask_minus(sseu.subslice_mask,
+                                       __subslice_count__ / 2 + 1);
+       igt_assert_eq(__gem_context_set_param(fd, &arg), -EINVAL);
+
+out:
+       gem_context_destroy(fd, arg.ctx_id);
+}
+
+igt_main
+{
+       int fd;
+
+       igt_fixture {
+               fd = drm_open_driver(DRIVER_INTEL);
+               igt_require_gem(fd);
+
+               __intel_devid__ = intel_get_drm_devid(fd);
+               __intel_gen__ = intel_gen(__intel_devid__);
+
+               igt_require(kernel_has_per_context_sseu_support(fd));
+       }
+
+       igt_subtest_group {
+               igt_fixture {
+                       drm_i915_getparam_t gp;
+
+                       gp.param = I915_PARAM_SLICE_MASK;
+                       gp.value = (int *) &__slice_mask__;
+                       do_ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
+                       __slice_count__ = __builtin_popcount(__slice_mask__);
+
+                       gp.param = I915_PARAM_SUBSLICE_MASK;
+                       gp.value = (int *) &__subslice_mask__;
+                       do_ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
+                       __subslice_count__ =
+                               __builtin_popcount(__subslice_mask__);
+               }
+
+               igt_subtest("invalid-args")
+                       test_invalid_args(fd);
+
+               igt_subtest("invalid-sseu")
+                       test_invalid_sseu(fd);
+
+               igt_subtest("ggtt-args")
+                       test_ggtt_args(fd);
+
+               igt_subtest("engines")
+                       test_engines(fd);
+       }
+
+       igt_fixture {
+               close(fd);
+       }
+}
diff --git a/tests/meson.build b/tests/meson.build
index b8a6e61b3404..f41f724af8af 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -288,6 +288,14 @@ foreach prog : gem_progs + gen3_progs
        test_list += prog
 endforeach
 
+test_executables += executable('gem_ctx_sseu',
+          join_paths('i915', 'gem_ctx_sseu.c'),
+          dependencies : test_deps + [ lib_igt_perf ],
+          install_dir : libexecdir,
+          install_rpath : libexecdir_rpathdir,
+          install : true)
+test_progs += 'gem_ctx_sseu'
+
 test_executables += executable('gem_eio',
           join_paths('i915', 'gem_eio.c'),
           dependencies : test_deps + [ realtime ],
-- 
2.19.1

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