[kvm-unit-tests PATCH 15/16] 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                | 55 +++++++++++++++++++++++++++++++++++++---
 arm/unittests.cfg        |  7 +++++
 lib/arm/asm/gic-v3-its.h |  2 ++
 lib/arm/gic-v3-its.c     | 22 ++++++++++++++++
 4 files changed, 82 insertions(+), 4 deletions(-)

diff --git a/arm/gic.c b/arm/gic.c
index 6b73258..8cca743 100644
--- a/arm/gic.c
+++ b/arm/gic.c
@@ -642,13 +642,19 @@ static int its_prerequisites(int nb_cpus)
        return 0;
 }
 
-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 */);
@@ -662,8 +668,6 @@ static void test_its_trigger(void)
        its_send_invall(col2);
        its_send_invall(col3);
 
-       report_prefix_push("int");
-
        its_send_mapd(dev2, true);
        its_send_mapd(dev7, true);
 
@@ -674,6 +678,23 @@ 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);
@@ -722,6 +743,28 @@ static void test_its_trigger(void)
        check_lpi_stats();
 }
 
+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();
+}
 
 int main(int argc, char **argv)
 {
@@ -757,6 +800,10 @@ 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 80a1d27..29e2efc 100644
--- a/arm/unittests.cfg
+++ b/arm/unittests.cfg
@@ -140,6 +140,13 @@ smp = $MAX_SMP
 extra_params = -machine gic-version=3 -append 'its-trigger'
 groups = its
 
+[its-migration]
+file = gic.flat
+smp = $MAX_SMP
+accel = kvm
+extra_params = -machine gic-version=3 -append 'its-migration'
+groups = its migration
+
 # 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 d4fd799..c38d524 100644
--- a/lib/arm/asm/gic-v3-its.h
+++ b/lib/arm/asm/gic-v3-its.h
@@ -206,6 +206,8 @@ 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 void its_print_cmd_state(void);
+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 9906428..e2e289c 100644
--- a/lib/arm/gic-v3-its.c
+++ b/lib/arm/gic-v3-its.c
@@ -330,3 +330,25 @@ struct its_collection *its_create_collection(u32 col_id, 
u32 pe)
        its_data.nb_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