Add the framework to test the intel-iommu device.
Currently only tested cap/ecap bits correctness in scalable
modern mode. Also tested cap/ecap bits consistency before
and after system reset.
Signed-off-by: Zhenzhong Duan <zhenzhong.d...@intel.com>
---
MAINTAINERS | 1 +
include/hw/i386/intel_iommu.h | 1 +
tests/qtest/intel-iommu-test.c | 71 ++++++++++++++++++++++++++++++++++
tests/qtest/meson.build | 1 +
4 files changed, 74 insertions(+)
create mode 100644 tests/qtest/intel-iommu-test.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 7d9811458c..ec765bf3d3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3662,6 +3662,7 @@ S: Supported
F: hw/i386/intel_iommu.c
F: hw/i386/intel_iommu_internal.h
F: include/hw/i386/intel_iommu.h
+F: tests/qtest/intel-iommu-test.c
AMD-Vi Emulation
S: Orphan
diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index 650641544c..b1848dbec6 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -47,6 +47,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(IntelIOMMUState,
INTEL_IOMMU_DEVICE)
#define VTD_HOST_AW_48BIT 48
#define VTD_HOST_AW_AUTO 0xff
#define VTD_HAW_MASK(aw) ((1ULL << (aw)) - 1)
+#define VTD_MGAW_FROM_CAP(cap) ((cap >> 16) & 0x3fULL)
#define DMAR_REPORT_F_INTR (1)
diff --git a/tests/qtest/intel-iommu-test.c b/tests/qtest/intel-iommu-test.c
new file mode 100644
index 0000000000..8e07034f6f
--- /dev/null
+++ b/tests/qtest/intel-iommu-test.c
@@ -0,0 +1,71 @@
+/*
+ * QTest testcase for intel-iommu
+ *
+ * Copyright (c) 2024 Intel, Inc.
+ *
+ * Author: Zhenzhong Duan <zhenzhong.d...@intel.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest.h"
+#include "hw/i386/intel_iommu_internal.h"
+
+#define CAP_MODERN_FIXED1 (VTD_CAP_FRO | VTD_CAP_NFR | VTD_CAP_ND | \
+ VTD_CAP_MAMV | VTD_CAP_PSI | VTD_CAP_SLLPS)
+#define ECAP_MODERN_FIXED1 (VTD_ECAP_QI | VTD_ECAP_IRO | VTD_ECAP_MHMV | \
+ VTD_ECAP_SMTS | VTD_ECAP_FLTS)
+
+static inline uint32_t vtd_reg_readl(QTestState *s, uint64_t offset)
+{
+ return qtest_readl(s, Q35_HOST_BRIDGE_IOMMU_ADDR + offset);
+}
+
+static inline uint64_t vtd_reg_readq(QTestState *s, uint64_t offset)
+{
+ return qtest_readq(s, Q35_HOST_BRIDGE_IOMMU_ADDR + offset);
+}
+
+static void test_intel_iommu_modern(void)
+{
+ uint8_t init_csr[DMAR_REG_SIZE]; /* register values */
+ uint8_t post_reset_csr[DMAR_REG_SIZE]; /* register values */
+ uint64_t cap, ecap, tmp;
+ QTestState *s;
+
+ s = qtest_init("-M q35 -device intel-iommu,x-scalable-mode=modern");
+
+ cap = vtd_reg_readq(s, DMAR_CAP_REG);
+ g_assert((cap & CAP_MODERN_FIXED1) == CAP_MODERN_FIXED1);
+
+ tmp = cap & VTD_CAP_SAGAW_MASK;
+ g_assert(tmp == (VTD_CAP_SAGAW_39bit | VTD_CAP_SAGAW_48bit));
+
+ tmp = VTD_MGAW_FROM_CAP(cap);
+ g_assert(tmp == VTD_HOST_AW_48BIT - 1);
+
+ ecap = vtd_reg_readq(s, DMAR_ECAP_REG);
+ g_assert((ecap & ECAP_MODERN_FIXED1) == ECAP_MODERN_FIXED1);
+ g_assert(ecap & VTD_ECAP_IR);
+
+ qtest_memread(s, Q35_HOST_BRIDGE_IOMMU_ADDR, init_csr, DMAR_REG_SIZE);
+
+ qobject_unref(qtest_qmp(s, "{ 'execute': 'system_reset' }"));
+ qtest_qmp_eventwait(s, "RESET");
+
+ qtest_memread(s, Q35_HOST_BRIDGE_IOMMU_ADDR, post_reset_csr,
DMAR_REG_SIZE);
+ /* Ensure registers are consistent after hard reset */
+ g_assert(!memcmp(init_csr, post_reset_csr, DMAR_REG_SIZE));
+
+ qtest_quit(s);
+}
+
+int main(int argc, char **argv)
+{
+ g_test_init(&argc, &argv, NULL);
+ qtest_add_func("/q35/intel-iommu/modern", test_intel_iommu_modern);
+
+ return g_test_run();
+}
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 6508bfb1a2..20d05d471b 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -79,6 +79,7 @@ qtests_i386 = \
(config_all_devices.has_key('CONFIG_SB16') ? ['fuzz-sb16-test'] : []) +
\
(config_all_devices.has_key('CONFIG_SDHCI_PCI') ? ['fuzz-sdcard-test'] : [])
+ \
(config_all_devices.has_key('CONFIG_ESP_PCI') ? ['am53c974-test'] : []) +
\
+ (config_all_devices.has_key('CONFIG_VTD') ? ['intel-iommu-test'] : []) +
\
(host_os != 'windows' and
\
config_all_devices.has_key('CONFIG_ACPI_ERST') ? ['erst-test'] : []) +
\
(config_all_devices.has_key('CONFIG_PCIE_PORT') and
\
--
2.34.1
