linux-kernel - [RFC PATCH v3 6/6] kvm: selftests: run gmem tests with KVM_GMEM_NO_DIRECT

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Message-ID: <20241030134912.515725-7-roypat@amazon.co.uk>
Date: Wed, 30 Oct 2024 13:49:10 +0000
From: Patrick Roy <roypat@...zon.co.uk>
To: <tabba@...gle.com>, <quic_eberman@...cinc.com>, <david@...hat.com>,
	<seanjc@...gle.com>, <pbonzini@...hat.com>, <jthoughton@...gle.com>,
	<ackerleytng@...gle.com>, <vannapurve@...gle.com>, <rppt@...nel.org>
CC: Patrick Roy <roypat@...zon.co.uk>, <graf@...zon.com>,
	<jgowans@...zon.com>, <derekmn@...zon.com>, <kalyazin@...zon.com>,
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Subject: [RFC PATCH v3 6/6] kvm: selftests: run gmem tests with KVM_GMEM_NO_DIRECT_MAP set

Also adjust test_create_guest_memfd_invalid, as now BIT(0) is a
valid value for flags (note that this also fixes an issue where the loop
in test_create_guest_memfd_invalid is a noop. I've posted that fix as a
separate patch last week [1]).

[1]: https://lore.kernel.org/kvm/20241024095956.3668818-1-roypat@amazon.co.uk/

Signed-off-by: Patrick Roy <roypat@...zon.co.uk>
---
 tools/testing/selftests/kvm/guest_memfd_test.c             | 2 +-
 .../selftests/kvm/x86_64/private_mem_conversions_test.c    | 7 ++++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
index ba0c8e9960358..d04f7ff3dfb15 100644
--- a/tools/testing/selftests/kvm/guest_memfd_test.c
+++ b/tools/testing/selftests/kvm/guest_memfd_test.c
@@ -134,7 +134,7 @@ static void test_create_guest_memfd_invalid(struct kvm_vm *vm)
 			    size);
 	}
 
-	for (flag = 0; flag; flag <<= 1) {
+	for (flag = BIT(1); flag; flag <<= 1) {
 		fd = __vm_create_guest_memfd(vm, page_size, flag);
 		TEST_ASSERT(fd == -1 && errno == EINVAL,
 			    "guest_memfd() with flag '0x%lx' should fail with EINVAL",
diff --git a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
index 82a8d88b5338e..dfc78781e93b8 100644
--- a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
+++ b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
@@ -367,7 +367,7 @@ static void *__test_mem_conversions(void *__vcpu)
 }
 
 static void test_mem_conversions(enum vm_mem_backing_src_type src_type, uint32_t nr_vcpus,
-				 uint32_t nr_memslots)
+				 uint32_t nr_memslots, uint64_t gmem_flags)
 {
 	/*
 	 * Allocate enough memory so that each vCPU's chunk of memory can be
@@ -394,7 +394,7 @@ static void test_mem_conversions(enum vm_mem_backing_src_type src_type, uint32_t
 
 	vm_enable_cap(vm, KVM_CAP_EXIT_HYPERCALL, (1 << KVM_HC_MAP_GPA_RANGE));
 
-	memfd = vm_create_guest_memfd(vm, memfd_size, 0);
+	memfd = vm_create_guest_memfd(vm, memfd_size, gmem_flags);
 
 	for (i = 0; i < nr_memslots; i++)
 		vm_mem_add(vm, src_type, BASE_DATA_GPA + slot_size * i,
@@ -477,7 +477,8 @@ int main(int argc, char *argv[])
 		}
 	}
 
-	test_mem_conversions(src_type, nr_vcpus, nr_memslots);
+	test_mem_conversions(src_type, nr_vcpus, nr_memslots, 0);
+	test_mem_conversions(src_type, nr_vcpus, nr_memslots, KVM_GMEM_NO_DIRECT_MAP);
 
 	return 0;
 }
-- 
2.47.0