[kvm-unit-tests PATCH v3 13/14] arm/arm64: ITS: migration tests

[Eric Auger]

This test maps LPIs (populates the device table, the collection table,
interrupt translation tables, configuration table), migrates and make
sure the translation is correct on the destination.

Signed-off-by: Eric Auger <address@hidden>
---
 arm/gic.c                | 59 ++++++++++++++++++++++++++++++++++++----
 arm/unittests.cfg        |  8 ++++++
 lib/arm/asm/gic-v3-its.h |  2 ++
 lib/arm/gic-v3-its.c     | 22 +++++++++++++++
 4 files changed, 85 insertions(+), 6 deletions(-)

diff --git a/arm/gic.c b/arm/gic.c
index 50104b1..fa8626a 100644
--- a/arm/gic.c
+++ b/arm/gic.c
@@ -593,6 +593,7 @@ static void gic_test_mmio(void)
 
 static void test_its_introspection(void) {}
 static void test_its_trigger(void) {}
+static void test_its_migration(void) {}
 
 #else /* __arch64__ */
 
@@ -665,13 +666,19 @@ static bool its_prerequisites(int nb_cpus)
        return false;
 }
 
-static void test_its_trigger(void)
+/*
+ * Setup the configuration for those mappings:
+ * dev_id=2 event=20 -> vcpu 3, intid=8195
+ * dev_id=7 event=255 -> vcpu 2, intid=8196
+ * LPIs ready to hit
+ */
+static int its_setup1(void)
 {
        struct its_collection *col3, *col2;
        struct its_device *dev2, *dev7;
 
        if (its_prerequisites(4))
-               return;
+               return -1;
 
        dev2 = its_create_device(2 /* dev id */, 8 /* nb_ites */);
        dev7 = its_create_device(7 /* dev id */, 8 /* nb_ites */);
@@ -685,14 +692,10 @@ static void test_its_trigger(void)
        its_send_invall(col2);
        its_send_invall(col3);
 
-       report_prefix_push("int");
        /*
         * dev=2, eventid=20  -> lpi= 8195, col=3
         * dev=7, eventid=255 -> lpi= 8196, col=2
-        * Trigger dev2, eventid=20 and dev7, eventid=255
-        * Check both LPIs hit
         */
-
        its_send_mapd(dev2, true);
        its_send_mapd(dev7, true);
 
@@ -703,6 +706,23 @@ static void test_its_trigger(void)
                       20 /* event id */, col3);
        its_send_mapti(dev7, 8196 /* lpi id */,
                       255 /* event id */, col2);
+       return 0;
+}
+
+static void test_its_trigger(void)
+{
+       struct its_collection *col3, *col2;
+       struct its_device *dev2, *dev7;
+
+       if (its_setup1())
+               return;
+
+       col3 = its_get_collection(3);
+       col2 = its_get_collection(2);
+       dev2 = its_get_device(2);
+       dev7 = its_get_device(7);
+
+       report_prefix_push("int");
 
        lpi_stats_expect(3, 8195);
        its_send_int(dev2, 20);
@@ -763,6 +783,29 @@ static void test_its_trigger(void)
        check_lpi_stats();
        report_prefix_pop();
 }
+
+static void test_its_migration(void)
+{
+       struct its_device *dev2, *dev7;
+
+       if (its_setup1())
+               return;
+
+       dev2 = its_get_device(2);
+       dev7 = its_get_device(7);
+
+       puts("Now migrate the VM, then press a key to continue...\n");
+       (void)getchar();
+       report(true, "Migration complete");
+
+       lpi_stats_expect(3, 8195);
+       its_send_int(dev2, 20);
+       check_lpi_stats();
+
+       lpi_stats_expect(2, 8196);
+       its_send_int(dev7, 255);
+       check_lpi_stats();
+}
 #endif
 
 int main(int argc, char **argv)
@@ -800,6 +843,10 @@ int main(int argc, char **argv)
                report_prefix_push(argv[1]);
                test_its_trigger();
                report_prefix_pop();
+       } else if (!strcmp(argv[1], "its-migration")) {
+               report_prefix_push(argv[1]);
+               test_its_migration();
+               report_prefix_pop();
        } else if (strcmp(argv[1], "its-introspection") == 0) {
                report_prefix_push(argv[1]);
                test_its_introspection();
diff --git a/arm/unittests.cfg b/arm/unittests.cfg
index bfafec5..8b8ec79 100644
--- a/arm/unittests.cfg
+++ b/arm/unittests.cfg
@@ -136,6 +136,14 @@ extra_params = -machine gic-version=3 -append 'its-trigger'
 groups = its
 arch = arm64
 
+[its-migration]
+file = gic.flat
+smp = $MAX_SMP
+accel = kvm
+extra_params = -machine gic-version=3 -append 'its-migration'
+groups = its migration
+arch = arm64
+
 # Test PSCI emulation
 [psci]
 file = psci.flat
diff --git a/lib/arm/asm/gic-v3-its.h b/lib/arm/asm/gic-v3-its.h
index 0e5c5b6..febc2b2 100644
--- a/lib/arm/asm/gic-v3-its.h
+++ b/lib/arm/asm/gic-v3-its.h
@@ -151,6 +151,8 @@ extern void its_send_invall(struct its_collection *col);
 extern void its_send_movi(struct its_device *dev,
                          struct its_collection *col, u32 id);
 extern void its_send_sync(struct its_collection *col);
+extern struct its_device *its_get_device(u32 id);
+extern struct its_collection *its_get_collection(u32 id);
 
 #define ITS_FLAGS_CMDQ_NEEDS_FLUSHING           (1ULL << 0)
 #define ITS_FLAGS_WORKAROUND_CAVIUM_22375       (1ULL << 1)
diff --git a/lib/arm/gic-v3-its.c b/lib/arm/gic-v3-its.c
index c2dcd01..099940e 100644
--- a/lib/arm/gic-v3-its.c
+++ b/lib/arm/gic-v3-its.c
@@ -219,3 +219,25 @@ struct its_collection *its_create_collection(u32 col_id, 
u32 pe)
        its_data.nr_collections++;
        return new;
 }
+
+struct its_device *its_get_device(u32 id)
+{
+       int i;
+
+       for (i = 0; i < GITS_MAX_DEVICES; i++) {
+               if (its_data.devices[i].device_id == id)
+                       return &its_data.devices[i];
+       }
+       return NULL;
+}
+
+struct its_collection *its_get_collection(u32 id)
+{
+       int i;
+
+       for (i = 0; i < GITS_MAX_COLLECTIONS; i++) {
+               if (its_data.collections[i].col_id == id)
+                       return &its_data.collections[i];
+       }
+       return NULL;
+}
-- 
2.20.1