Hi Drew,
On 2/7/20 3:06 PM, Andrew Jones wrote:
> On Tue, Jan 28, 2020 at 11:34:59AM +0100, 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>
>>
>> ---
>>
>> v2 -> v3:
>> - tests belong to both its and migration groups
>> ---
>> arm/gic.c | 150 ++++++++++++++++++++++++++++++++++++++++++++++
>> arm/unittests.cfg | 16 +++++
>> 2 files changed, 166 insertions(+)
>>
>> diff --git a/arm/gic.c b/arm/gic.c
>> index fa8626a..ec3dd3a 100644
>> --- a/arm/gic.c
>> +++ b/arm/gic.c
>> @@ -195,6 +195,7 @@ 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 */
>> }
>>
>> @@ -239,6 +240,18 @@ static void secondary_lpi_test(void)
>> while (1)
>> wfi();
>> }
>> +
>> +static void check_lpi_hits(int *expected)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < nr_cpus; i++) {
>> + if (acked[i] != expected[i])
>> + report(false, "expected %d LPIs on PE #%d, %d observed",
>> + expected[i], i, acked[i]);
>
> report_info
> pass = false
>
>> + }
>> + report(true, "check LPI on all vcpus");
>
> report(pass, ...);
I still don't get the issue.
>
>> +}
>> #endif
>>
>> static void gicv2_ipi_send_self(void)
>> @@ -594,6 +607,8 @@ 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_migrate_unmapped_collection(void) {}
>> +static void test_its_pending_migration(void) {}
>
> I'm not sure what's worse. This pile of stubs or one #ifdef in main()
> wrapping all the calls.
Those stubs now are in the arm header.
>
>>
>> #else /* __arch64__ */
>>
>> @@ -666,6 +681,18 @@ static bool its_prerequisites(int nb_cpus)
>> return false;
>> }
>>
>> +static void set_lpi(struct its_device *dev, u32 eventid, u32 physid,
>> + struct its_collection *col)
>> +{
>> + if (!dev || !col)
>
> I don't think col can be null, and this doesn't look like the right place
> to check if dev is null. If we're bothiner to call set_lpi, then I
> think we should already expect dev to be good to go.
put an assert() instead
>
>> + report_abort("wrong device or collection");
>> +
>> + its_send_mapti(dev, physid, eventid, col);
>> +
>> + gicv3_lpi_set_config(physid, LPI_PROP_DEFAULT);
>> + its_send_invall(col);
>> +}
>> +
>> /*
>> * Setup the configuration for those mappings:
>> * dev_id=2 event=20 -> vcpu 3, intid=8195
>> @@ -806,6 +833,121 @@ static void test_its_migration(void)
>> its_send_int(dev7, 255);
>> check_lpi_stats();
>> }
>> +
>> +static void test_migrate_unmapped_collection(void)
>> +{
>> + struct its_collection *col;
>> + struct its_device *dev2, *dev7;
>> + u8 config;
>> +
>> + if (its_setup1())
>> + return;
>> +
>> + col = its_create_collection(nr_cpus - 1, nr_cpus - 1);
>> + 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(true, "Migration complete");
>
> report_info
yep
>
>> +
>> + /* on the destination, map the collection */
>> + its_send_mapc(col, true);
>> +
>> + lpi_stats_expect(2, 8196);
>> + its_send_int(dev7, 255);
>> + check_lpi_stats();
>> +
>> + config = gicv3_lpi_get_config(8192);
>> + report(config == LPI_PROP_DEFAULT,
>> + "Config of LPI 8192 was properly migrated");
>> +
>> + lpi_stats_expect(nr_cpus - 1, 8192);
>> + its_send_int(dev2, 0);
>> + check_lpi_stats();
>> +
>> + /* unmap the collection */
>> + its_send_mapc(col, false);
>> +
>> + lpi_stats_expect(-1, -1);
>> + its_send_int(dev2, 0);
>> + check_lpi_stats();
>> +
>> + /* remap event 0 onto lpiid 8193 */
>> + set_lpi(dev2, 0, 8193, col);
>> + lpi_stats_expect(-1, -1);
>> + its_send_int(dev2, 0);
>> + check_lpi_stats();
>> +
>> + /* remap the collection */
>> + its_send_mapc(col, true);
>> + lpi_stats_expect(nr_cpus - 1, 8193);
>> +}
>> +
>> +static void test_its_pending_migration(void)
>> +{
>> + struct its_device *dev;
>> + struct its_collection *collection[2];
>> + int expected[NR_CPUS];
>
> expected = malloc(nr_cpus * sizeof(int));
>
> I know there are other places using NR_CPUS right now that don't have to,
> but we shouldn't add more. Eventually I'll change the other places too.
OK
>
>> + 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(nr_cpus - 1, nr_cpus - 1);
>> + collection[1] = its_create_collection(nr_cpus - 2, nr_cpus - 2);
>> + its_send_mapc(collection[0], true);
>> + its_send_mapc(collection[1], true);
>> +
>> + /* disable lpi at redist level */
>> + gicv3_lpi_rdist_ctrl(nr_cpus - 1, false);
>> + gicv3_lpi_rdist_ctrl(nr_cpus - 2, false);
>> +
>> + /* even lpis are assigned to even cpu */
>> + for (i = 0; i < 256; i++) {
>> + struct its_collection *col = i % 2 ? collection[0] :
>> + collection[1];
>> + int vcpu = col->target_address >> 16;
>
> I'm lost with the even/odd (nr_cpus - 1)/(nr_cpus - 2) stuff, and won't
> it swap if nr_cpus is odd vs. even?
>
> Shouldn't we just have something like
>
> pe1 = nr_cpus - 1;
> pe2 = nr_cpus - 2;
> col1 = its_create_collection(pe1, pe1);
> col2 = its_create_collection(pe2, pe2);
>
> without mentioning even and odd?
OK
>
>> +
>> + its_send_mapti(dev, 8192 + i, i, col);
>> + gicv3_lpi_set_config(8192 + i, LPI_PROP_DEFAULT);
>> + gicv3_lpi_set_pending_table_bit(vcpu, 8192 + i, true);
>> + }
>> + its_send_invall(collection[0]);
>> + its_send_invall(collection[1]);
>> +
>> + /* Set the PTZ bit on each pendbaser */
>> +
>> + expected[nr_cpus - 1] = 128;
>> + expected[nr_cpus - 2] = 128;
>> +
>> + ptr = gicv3_data.redist_base[nr_cpus - 1] + GICR_PENDBASER;
>> + pendbaser = readq(ptr);
>> + writeq(pendbaser & ~GICR_PENDBASER_PTZ, ptr);
>> +
>> + ptr = gicv3_data.redist_base[nr_cpus - 2] + GICR_PENDBASER;
>> + pendbaser = readq(ptr);
>> + writeq(pendbaser & ~GICR_PENDBASER_PTZ, ptr);
>> +
>> + gicv3_lpi_rdist_ctrl(nr_cpus - 1, true);
>> + gicv3_lpi_rdist_ctrl(nr_cpus - 2, true);
>> +
>> + puts("Now migrate the VM, then press a key to continue...\n");
>> + (void)getchar();
>> + report(true, "Migration complete");
>
> report_info
OK
>
>> +
>> + mdelay(1000);
>
> This delay needs a comment explaining why it's here.
OK
Thanks
Eric
>
>> +
>> + check_lpi_hits(expected);
>> +}
>> #endif
>>
>> int main(int argc, char **argv)
>> @@ -847,6 +989,14 @@ int main(int argc, char **argv)
>> report_prefix_push(argv[1]);
>> test_its_migration();
>> report_prefix_pop();
>> + } else if (!strcmp(argv[1], "its-pending-migration")) {
>> + report_prefix_push(argv[1]);
>> + test_its_pending_migration();
>> + report_prefix_pop();
>> + } else if (!strcmp(argv[1], "its-migrate-unmapped-collection")) {
>> + report_prefix_push(argv[1]);
>> + test_migrate_unmapped_collection();
>> + 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 8b8ec79..d917157 100644
>> --- a/arm/unittests.cfg
>> +++ b/arm/unittests.cfg
>> @@ -144,6 +144,22 @@ extra_params = -machine gic-version=3 -append 'its-migration'
>> groups = its migration
>> arch = arm64
>>
>> +[its-pending-migration]
>> +file = gic.flat
>> +smp = $MAX_SMP
>> +accel = kvm
>> +extra_params = -machine gic-version=3 -append 'its-pending-migration'
>> +groups = its migration
>> +arch = arm64
>> +
>> +[its-migrate-unmapped-collection]
>> +file = gic.flat
>> +smp = $MAX_SMP
>> +accel = kvm
>> +extra_params = -machine gic-version=3 -append 'its-migrate-unmapped-collection'
>> +groups = its migration
>> +arch = arm64
>> +
>> # Test PSCI emulation
>> [psci]
>> file = psci.flat
>> --
>> 2.20.1
>>
>>
>
> Thanks,
> drew
>
