linux-kernel - [PATCH v10 8/8] selftests: pci_endpoint: Add BAR subrange mapping test case

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Message-ID: <20260124145012.2794108-9-den@valinux.co.jp>
Date: Sat, 24 Jan 2026 23:50:12 +0900
From: Koichiro Den <den@...inux.co.jp>
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Subject: [PATCH v10 8/8] selftests: pci_endpoint: Add BAR subrange mapping test case

Add BAR_SUBRANGE_TEST to the pci_endpoint kselftest suite.

The test uses the PCITEST_BAR_SUBRANGE ioctl and will skip when the
chosen BAR is disabled (-ENODATA), when the endpoint/controller does not
support subrange mapping (-EOPNOTSUPP), or when the BAR is reserved for
the test register space (-EBUSY).

Signed-off-by: Koichiro Den <den@...inux.co.jp>
---
 .../selftests/pci_endpoint/pci_endpoint_test.c  | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/tools/testing/selftests/pci_endpoint/pci_endpoint_test.c b/tools/testing/selftests/pci_endpoint/pci_endpoint_test.c
index 23aac6f97061..eecb776c33af 100644
--- a/tools/testing/selftests/pci_endpoint/pci_endpoint_test.c
+++ b/tools/testing/selftests/pci_endpoint/pci_endpoint_test.c
@@ -70,6 +70,23 @@ TEST_F(pci_ep_bar, BAR_TEST)
 	EXPECT_FALSE(ret) TH_LOG("Test failed for BAR%d", variant->barno);
 }
 
+TEST_F(pci_ep_bar, BAR_SUBRANGE_TEST)
+{
+	int ret;
+
+	pci_ep_ioctl(PCITEST_SET_IRQTYPE, PCITEST_IRQ_TYPE_AUTO);
+	ASSERT_EQ(0, ret) TH_LOG("Can't set AUTO IRQ type");
+
+	pci_ep_ioctl(PCITEST_BAR_SUBRANGE, variant->barno);
+	if (ret == -ENODATA)
+		SKIP(return, "BAR is disabled");
+	if (ret == -EBUSY)
+		SKIP(return, "BAR is test register space");
+	if (ret == -EOPNOTSUPP)
+		SKIP(return, "Subrange map is not supported");
+	EXPECT_FALSE(ret) TH_LOG("Test failed for BAR%d", variant->barno);
+}
+
 FIXTURE(pci_ep_basic)
 {
 	int fd;
-- 
2.51.0