Hi Eric,
On 2020/3/10 22:54, Eric Auger wrote:
Add two new migration tests. One testing the migration of
a topology where collection were unmapped. The second test
checks the migration of the pending table.
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
v4 -> v5:
- move stub from header to arm/gic.c
v3 -> v4:
- do not talk about odd/even CPUs, use pe0 and pe1
- comment the delay
v2 -> v3:
- tests belong to both its and migration groups
- use LPI(i)
- gicv3_lpi_set_pending_table_bit renamed into gicv3_lpi_set_clr_pending
---
arm/gic.c | 146 ++++++++++++++++++++++++++++++++++++++++++++++
arm/unittests.cfg | 16 +++++
2 files changed, 162 insertions(+)
diff --git a/arm/gic.c b/arm/gic.c
index b8fbc13..e6ffbc3 100644
--- a/arm/gic.c
+++ b/arm/gic.c
@@ -193,6 +193,7 @@ static void lpi_handler(struct pt_regs *regs __unused)
smp_rmb(); /* pairs with wmb in lpi_stats_expect */
lpi_stats.observed.cpu_id = smp_processor_id();
lpi_stats.observed.lpi_id = irqnr;
+ acked[lpi_stats.observed.cpu_id]++;
smp_wmb(); /* pairs with rmb in check_lpi_stats */
}
@@ -236,6 +237,22 @@ static void secondary_lpi_test(void)
while (1)
wfi();
}
+
+static void check_lpi_hits(int *expected, const char *msg)
+{
+ bool pass = true;
+ int i;
+
+ for (i = 0; i < nr_cpus; i++) {
+ if (acked[i] != expected[i]) {
+ report_info("expected %d LPIs on PE #%d, %d observed",
+ expected[i], i, acked[i]);
+ pass = false;
+ break;
+ }
+ }
+ report(pass, "%s", msg);
+}
#endif
static void gicv2_ipi_send_self(void)
@@ -591,6 +608,8 @@ static void gic_test_mmio(void)
static void test_its_introspection(void) {}
static void test_its_trigger(void) {}
static void test_its_migration(void) {}
+static void test_its_pending_migration(void) {}
+static void test_migrate_unmapped_collection(void) {}
#else /* __aarch64__ */
@@ -659,6 +678,17 @@ static int its_prerequisites(int nb_cpus)
return 0;
}
+static void set_lpi(struct its_device *dev, u32 eventid, u32 physid,
+ struct its_collection *col)
+{
+ assert(dev && col);
+
+ its_send_mapti(dev, physid, eventid, col);
+
+ gicv3_lpi_set_config(physid, LPI_PROP_DEFAULT);
+ its_send_invall(col);
Again, the col hasn't been mapped currently.
+}
+
/*
* Setup the configuration for those mappings:
* dev_id=2 event=20 -> vcpu 3, intid=8195
@@ -799,6 +829,114 @@ static void test_its_migration(void)
its_send_int(dev7, 255);
check_lpi_stats("dev7/eventid=255 triggers LPI 8196 on PE #2 after migration");
}
+
+static void test_migrate_unmapped_collection(void)
+{
+ struct its_collection *col;
+ struct its_device *dev2, *dev7;
+ int pe0 = nr_cpus - 1;
+ u8 config;
+
+ if (its_setup1())
+ return;
+
+ col = its_create_collection(pe0, pe0);
+ dev2 = its_get_device(2);
+ dev7 = its_get_device(7);
+
+ /* MAPTI with the collection unmapped */
+ set_lpi(dev2, 0, 8192, col);
+
+ puts("Now migrate the VM, then press a key to continue...\n");
+ (void)getchar();
+ report_info("Migration complete");
+
+ /* on the destination, map the collection */
+ its_send_mapc(col, true);
+
+ lpi_stats_expect(2, 8196);
+ its_send_int(dev7, 255);
+ check_lpi_stats("dev7/eventid= 255 triggered LPI 8196 on PE #2");
+
+ config = gicv3_lpi_get_config(8192);
+ report(config == LPI_PROP_DEFAULT,
+ "Config of LPI 8192 was properly migrated");
+
+ lpi_stats_expect(pe0, 8192);
+ its_send_int(dev2, 0);
+ check_lpi_stats("dev2/eventid = 0 triggered LPI 8192 on PE0");
+
+ /* unmap the collection */
+ its_send_mapc(col, false);
Again, behavior is unpredictable.
+
+ lpi_stats_expect(-1, -1);
+ its_send_int(dev2, 0);
+ check_lpi_stats("no LPI triggered after collection unmapping");
+}
+
+static void test_its_pending_migration(void)
+{
+ struct its_device *dev;
+ struct its_collection *collection[2];
+ int *expected = malloc(nr_cpus * sizeof(int));
+ int pe0 = nr_cpus - 1, pe1 = nr_cpus - 2;
+ u64 pendbaser;
+ void *ptr;
+ int i;
+
+ if (its_prerequisites(4))
+ return;
+
+ dev = its_create_device(2 /* dev id */, 8 /* nb_ites */);
+ its_send_mapd(dev, true);
+
+ collection[0] = its_create_collection(pe0, pe0);
+ collection[1] = its_create_collection(pe1, pe1);
+ its_send_mapc(collection[0], true);
+ its_send_mapc(collection[1], true);
+
+ /* disable lpi at redist level */
+ gicv3_lpi_rdist_disable(pe0);
+ gicv3_lpi_rdist_disable(pe1);
+
+ /* lpis are interleaved inbetween the 2 PEs */
+ for (i = 0; i < 256; i++) {
+ struct its_collection *col = i % 2 ? collection[0] :
+ collection[1];
+ int vcpu = col->target_address >> 16;
+
+ its_send_mapti(dev, LPI(i), i, col);
+ gicv3_lpi_set_config(LPI(i), LPI_PROP_DEFAULT);
+ gicv3_lpi_set_clr_pending(vcpu, LPI(i), true);
+ }
+ its_send_invall(collection[0]);
+ its_send_invall(collection[1]);
+
+ /* Set the PTZ bit on each pendbaser */
'Clear' the PTZ.
Otherwise looks good!
+
+ expected[pe0] = 128;
+ expected[pe1] = 128;
+
+ ptr = gicv3_data.redist_base[pe0] + GICR_PENDBASER;
+ pendbaser = readq(ptr);
+ writeq(pendbaser & ~GICR_PENDBASER_PTZ, ptr);
+
+ ptr = gicv3_data.redist_base[pe1] + GICR_PENDBASER;
+ pendbaser = readq(ptr);
+ writeq(pendbaser & ~GICR_PENDBASER_PTZ, ptr);
+
+ gicv3_lpi_rdist_enable(pe0);
+ gicv3_lpi_rdist_enable(pe1);
+
+ puts("Now migrate the VM, then press a key to continue...\n");
+ (void)getchar();
+ report_info("Migration complete");
+
+ /* let's wait for the 256 LPIs to be handled */
+ mdelay(1000);
+
+ check_lpi_hits(expected, "128 LPIs on both PE0 and PE1 after migration");
+}
Thanks,
Zenghui
