linux-kernel - [RFC PATCH 19/39] KVM: selftests: Update test for various private memory backing source types

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Message-ID: <41d7d714cfa7cec3e7089a184918da39e93008ee.1726009989.git.ackerleytng@google.com>
Date: Tue, 10 Sep 2024 23:43:50 +0000
From: Ackerley Tng <ackerleytng@...gle.com>
To: tabba@...gle.com, quic_eberman@...cinc.com, roypat@...zon.co.uk, 
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Subject: [RFC PATCH 19/39] KVM: selftests: Update test for various private
 memory backing source types

Update private_mem_conversions_test for various private memory backing
source types.

Signed-off-by: Ackerley Tng <ackerleytng@...gle.com>
---
 .../kvm/x86_64/private_mem_conversions_test.c | 28 ++++++++++++++-----
 1 file changed, 21 insertions(+), 7 deletions(-)

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 82a8d88b5338..71f480c19f92 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
@@ -366,14 +366,20 @@ 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)
+static void
+test_mem_conversions(enum vm_mem_backing_src_type src_type,
+		     enum vm_private_mem_backing_src_type private_mem_src_type,
+		     uint32_t nr_vcpus,
+		     uint32_t nr_memslots)
 {
 	/*
 	 * Allocate enough memory so that each vCPU's chunk of memory can be
 	 * naturally aligned with respect to the size of the backing store.
 	 */
-	const size_t alignment = max_t(size_t, SZ_2M, get_backing_src_pagesz(src_type));
+	const size_t alignment = max_t(size_t, SZ_2M,
+				       max_t(size_t,
+					     get_private_mem_backing_src_pagesz(private_mem_src_type),
+					     get_backing_src_pagesz(src_type)));
 	const size_t per_cpu_size = align_up(PER_CPU_DATA_SIZE, alignment);
 	const size_t memfd_size = per_cpu_size * nr_vcpus;
 	const size_t slot_size = memfd_size / nr_memslots;
@@ -394,7 +400,9 @@ 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,
+		vm_private_mem_backing_src_alias(private_mem_src_type)->flag);
 
 	for (i = 0; i < nr_memslots; i++)
 		vm_mem_add(vm, src_type, BASE_DATA_GPA + slot_size * i,
@@ -440,10 +448,12 @@ static void test_mem_conversions(enum vm_mem_backing_src_type src_type, uint32_t
 static void usage(const char *cmd)
 {
 	puts("");
-	printf("usage: %s [-h] [-m nr_memslots] [-s mem_type] [-n nr_vcpus]\n", cmd);
+	printf("usage: %s [-h] [-m nr_memslots] [-s mem_type] [-p private_mem_type] [-n nr_vcpus]\n", cmd);
 	puts("");
 	backing_src_help("-s");
 	puts("");
+	private_mem_backing_src_help("-p");
+	puts("");
 	puts(" -n: specify the number of vcpus (default: 1)");
 	puts("");
 	puts(" -m: specify the number of memslots (default: 1)");
@@ -453,17 +463,21 @@ static void usage(const char *cmd)
 int main(int argc, char *argv[])
 {
 	enum vm_mem_backing_src_type src_type = DEFAULT_VM_MEM_SRC;
+	enum vm_private_mem_backing_src_type private_mem_src_type = DEFAULT_VM_PRIVATE_MEM_SRC;
 	uint32_t nr_memslots = 1;
 	uint32_t nr_vcpus = 1;
 	int opt;
 
 	TEST_REQUIRE(kvm_check_cap(KVM_CAP_VM_TYPES) & BIT(KVM_X86_SW_PROTECTED_VM));
 
-	while ((opt = getopt(argc, argv, "hm:s:n:")) != -1) {
+	while ((opt = getopt(argc, argv, "hm:s:p:n:")) != -1) {
 		switch (opt) {
 		case 's':
 			src_type = parse_backing_src_type(optarg);
 			break;
+		case 'p':
+			private_mem_src_type = parse_private_mem_backing_src_type(optarg);
+			break;
 		case 'n':
 			nr_vcpus = atoi_positive("nr_vcpus", optarg);
 			break;
@@ -477,7 +491,7 @@ int main(int argc, char *argv[])
 		}
 	}
 
-	test_mem_conversions(src_type, nr_vcpus, nr_memslots);
+	test_mem_conversions(src_type, private_mem_src_type, nr_vcpus, nr_memslots);
 
 	return 0;
 }
-- 
2.46.0.598.g6f2099f65c-goog