[PATCH 2/5] KVM: selftests: fix maxnode arguments in xapic_ipi_test

[Shivank Garg <shivankg@amd.com>]

migrate_pages() syscall expect maxnode to be one greater than the
number of bits in the nodemask. do_migrations() passes the size of
nodemask in bytes to migrate_pages(). This sets the maxnode to 8,
so kernel only checks node IDs 0-6 even though the nodemask covers
node IDs 0-63.

Pass the nodemask size in bits plus one because get_nodes() in
mempolicy does --maxnode.

Fixes: 678e90a349a4 ("KVM: selftests: Test IPI to halted vCPU in xAPIC while backing page moves")
Signed-off-by: Shivank Garg <shivankg@amd.com>
---
 tools/testing/selftests/kvm/x86/xapic_ipi_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/x86/xapic_ipi_test.c b/tools/testing/selftests/kvm/x86/xapic_ipi_test.c
index 39ce9a9369f5..761e47e4cae2 100644
--- a/tools/testing/selftests/kvm/x86/xapic_ipi_test.c
+++ b/tools/testing/selftests/kvm/x86/xapic_ipi_test.c
@@ -310,7 +310,7 @@ void do_migrations(struct test_data_page *data, int run_secs, int delay_usecs,
 		 * KVM_CREATE_VCPU ioctl. If that assumption ever changes this
 		 * test may break or give a false positive signal.
 		 */
-		pages_not_moved = migrate_pages(0, sizeof(nodemasks[from]),
+		pages_not_moved = migrate_pages(0, sizeof(nodemasks[from]) * 8 + 1,
 						&nodemasks[from],
 						&nodemasks[to]);
 		if (pages_not_moved < 0)

-- 
2.43.0