[PATCH v5 13/21] KVM: selftests: Make number of IRQs configurable in IRQ test

[Josh Hilke <jrhilke@google.com>]

From: David Matlack <dmatlack@google.com>

Add a '-i' flag to tools/testing/selftests/kvm/irq_test.c to allow users
to specify the number of IRQs generated during a test run.

Co-developed-by: Josh Hilke <jrhilke@google.com>
Signed-off-by: Josh Hilke <jrhilke@google.com>
Signed-off-by: David Matlack <dmatlack@google.com>
---
 tools/testing/selftests/kvm/irq_test.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/kvm/irq_test.c b/tools/testing/selftests/kvm/irq_test.c
index b0c4547a7f14..de8c29baa2b0 100644
--- a/tools/testing/selftests/kvm/irq_test.c
+++ b/tools/testing/selftests/kvm/irq_test.c
@@ -123,13 +123,14 @@ static void kvm_clear_gsi_routes(struct kvm_vm *vm)
 
 static void help(const char *name)
 {
-	printf("Usage: %s [-a] [-b] [-c] [-d <segment:bus:device.function>] [-h]\n", name);
+	printf("Usage: %s [-a] [-b] [-c] [-d <segment:bus:device.function>] [-h] [-i nr_irqs]\n", name);
 	printf("\n");
 	printf("Tests KVM IRQ injection via irqfd using an emulated eventfd.\n");
 	printf("-a	Randomly affinitize the device's host IRQ to different physical CPUs throughout the test\n");
 	printf("-b	Block vCPUs (e.g. HLT) instead of spinning in guest-mode\n");
 	printf("-c	Destroy and recreate KVM's GSI routing table in between some interrupts\n");
 	printf("-d	Use a VFIO device to send MSI-X interrupts instead of using an emulated eventfd\n");
+	printf("-i	The number of IRQs to generate during the test\n");
 	printf("\n");
 	exit(KSFT_FAIL);
 }
@@ -164,7 +165,7 @@ int main(int argc, char **argv)
 	unsigned int irq;
 	int irq_cpu;
 
-	while ((c = getopt(argc, argv, "abcd:h")) != -1) {
+	while ((c = getopt(argc, argv, "abcd:hi:")) != -1) {
 		switch (c) {
 		case 'a':
 			irq_affinity = true;
@@ -178,6 +179,9 @@ int main(int argc, char **argv)
 		case 'c':
 			clear_routes = true;
 			break;
+		case 'i':
+			nr_irqs = atoi_positive("Number of IRQs", optarg);
+			break;
 		case 'h':
 		default:
 			help(argv[0]);
-- 
2.54.0.1032.g2f8565e1d1-goog