From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
To test the RISC-V IOMMU emulation we'll use its PCI representation.
Create a new 'riscv-iommu-pci' libqos device that will be present with
CONFIG_RISCV_IOMMU. This config is only available for RISC-V, so this
device will only be consumed by the RISC-V libqos machine.
Start with basic tests: a PCI sanity check and a reset state register
test. The reset test was taken from the RISC-V IOMMU spec chapter 5.2,
"Reset behavior".
More tests will be added later.
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20241016204038.649340-8-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
tests/qtest/libqos/riscv-iommu.h | 71 ++++++++++++++++++++++++++
tests/qtest/libqos/riscv-iommu.c | 76 ++++++++++++++++++++++++++++
tests/qtest/riscv-iommu-test.c | 85 ++++++++++++++++++++++++++++++++
tests/qtest/libqos/meson.build | 4 ++
tests/qtest/meson.build | 1 +
5 files changed, 237 insertions(+)
create mode 100644 tests/qtest/libqos/riscv-iommu.h
create mode 100644 tests/qtest/libqos/riscv-iommu.c
create mode 100644 tests/qtest/riscv-iommu-test.c
diff --git a/tests/qtest/libqos/riscv-iommu.h b/tests/qtest/libqos/riscv-iommu.h
new file mode 100644
index 0000000000..d123efb41f
--- /dev/null
+++ b/tests/qtest/libqos/riscv-iommu.h
@@ -0,0 +1,71 @@
+/*
+ * libqos driver riscv-iommu-pci framework
+ *
+ * Copyright (c) 2024 Ventana Micro Systems Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at your
+ * option) any later version. See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef TESTS_LIBQOS_RISCV_IOMMU_H
+#define TESTS_LIBQOS_RISCV_IOMMU_H
+
+#include "qgraph.h"
+#include "pci.h"
+#include "qemu/bitops.h"
+
+#ifndef GENMASK_ULL
+#define GENMASK_ULL(h, l) (((~0ULL) >> (63 - (h) + (l))) << (l))
+#endif
+
+/*
+ * RISC-V IOMMU uses PCI_VENDOR_ID_REDHAT 0x1b36 and
+ * PCI_DEVICE_ID_REDHAT_RISCV_IOMMU 0x0014.
+ */
+#define RISCV_IOMMU_PCI_VENDOR_ID 0x1b36
+#define RISCV_IOMMU_PCI_DEVICE_ID 0x0014
+#define RISCV_IOMMU_PCI_DEVICE_CLASS 0x0806
+
+/* Common field positions */
+#define RISCV_IOMMU_QUEUE_ENABLE BIT(0)
+#define RISCV_IOMMU_QUEUE_INTR_ENABLE BIT(1)
+#define RISCV_IOMMU_QUEUE_MEM_FAULT BIT(8)
+#define RISCV_IOMMU_QUEUE_ACTIVE BIT(16)
+#define RISCV_IOMMU_QUEUE_BUSY BIT(17)
+
+#define RISCV_IOMMU_REG_CAP 0x0000
+#define RISCV_IOMMU_CAP_VERSION GENMASK_ULL(7, 0)
+
+#define RISCV_IOMMU_REG_DDTP 0x0010
+#define RISCV_IOMMU_DDTP_BUSY BIT_ULL(4)
+#define RISCV_IOMMU_DDTP_MODE GENMASK_ULL(3, 0)
+#define RISCV_IOMMU_DDTP_MODE_OFF 0
+
+#define RISCV_IOMMU_REG_CQCSR 0x0048
+#define RISCV_IOMMU_CQCSR_CQEN RISCV_IOMMU_QUEUE_ENABLE
+#define RISCV_IOMMU_CQCSR_CIE RISCV_IOMMU_QUEUE_INTR_ENABLE
+#define RISCV_IOMMU_CQCSR_CQON RISCV_IOMMU_QUEUE_ACTIVE
+#define RISCV_IOMMU_CQCSR_BUSY RISCV_IOMMU_QUEUE_BUSY
+
+#define RISCV_IOMMU_REG_FQCSR 0x004C
+#define RISCV_IOMMU_FQCSR_FQEN RISCV_IOMMU_QUEUE_ENABLE
+#define RISCV_IOMMU_FQCSR_FIE RISCV_IOMMU_QUEUE_INTR_ENABLE
+#define RISCV_IOMMU_FQCSR_FQON RISCV_IOMMU_QUEUE_ACTIVE
+#define RISCV_IOMMU_FQCSR_BUSY RISCV_IOMMU_QUEUE_BUSY
+
+#define RISCV_IOMMU_REG_PQCSR 0x0050
+#define RISCV_IOMMU_PQCSR_PQEN RISCV_IOMMU_QUEUE_ENABLE
+#define RISCV_IOMMU_PQCSR_PIE RISCV_IOMMU_QUEUE_INTR_ENABLE
+#define RISCV_IOMMU_PQCSR_PQON RISCV_IOMMU_QUEUE_ACTIVE
+#define RISCV_IOMMU_PQCSR_BUSY RISCV_IOMMU_QUEUE_BUSY
+
+#define RISCV_IOMMU_REG_IPSR 0x0054
+
+typedef struct QRISCVIOMMU {
+ QOSGraphObject obj;
+ QPCIDevice dev;
+ QPCIBar reg_bar;
+} QRISCVIOMMU;
+
+#endif
diff --git a/tests/qtest/libqos/riscv-iommu.c b/tests/qtest/libqos/riscv-iommu.c
new file mode 100644
index 0000000000..01e3b31c0b
--- /dev/null
+++ b/tests/qtest/libqos/riscv-iommu.c
@@ -0,0 +1,76 @@
+/*
+ * libqos driver riscv-iommu-pci framework
+ *
+ * Copyright (c) 2024 Ventana Micro Systems Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at your
+ * option) any later version. See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "../libqtest.h"
+#include "qemu/module.h"
+#include "qgraph.h"
+#include "pci.h"
+#include "riscv-iommu.h"
+
+static void *riscv_iommu_pci_get_driver(void *obj, const char *interface)
+{
+ QRISCVIOMMU *r_iommu_pci = obj;
+
+ if (!g_strcmp0(interface, "pci-device")) {
+ return &r_iommu_pci->dev;
+ }
+
+ fprintf(stderr, "%s not present in riscv_iommu_pci\n", interface);
+ g_assert_not_reached();
+}
+
+static void riscv_iommu_pci_start_hw(QOSGraphObject *obj)
+{
+ QRISCVIOMMU *pci = (QRISCVIOMMU *)obj;
+ qpci_device_enable(&pci->dev);
+}
+
+static void riscv_iommu_pci_destructor(QOSGraphObject *obj)
+{
+ QRISCVIOMMU *pci = (QRISCVIOMMU *)obj;
+ qpci_iounmap(&pci->dev, pci->reg_bar);
+}
+
+static void *riscv_iommu_pci_create(void *pci_bus, QGuestAllocator *alloc,
+ void *addr)
+{
+ QRISCVIOMMU *r_iommu_pci = g_new0(QRISCVIOMMU, 1);
+ QPCIBus *bus = pci_bus;
+
+ qpci_device_init(&r_iommu_pci->dev, bus, addr);
+ r_iommu_pci->reg_bar = qpci_iomap(&r_iommu_pci->dev, 0, NULL);
+
+ r_iommu_pci->obj.get_driver = riscv_iommu_pci_get_driver;
+ r_iommu_pci->obj.start_hw = riscv_iommu_pci_start_hw;
+ r_iommu_pci->obj.destructor = riscv_iommu_pci_destructor;
+ return &r_iommu_pci->obj;
+}
+
+static void riscv_iommu_pci_register_nodes(void)
+{
+ QPCIAddress addr = {
+ .vendor_id = RISCV_IOMMU_PCI_VENDOR_ID,
+ .device_id = RISCV_IOMMU_PCI_DEVICE_ID,
+ .devfn = QPCI_DEVFN(1, 0),
+ };
+
+ QOSGraphEdgeOptions opts = {
+ .extra_device_opts = "addr=01.0",
+ };
+
+ add_qpci_address(&opts, &addr);
+
+ qos_node_create_driver("riscv-iommu-pci", riscv_iommu_pci_create);
+ qos_node_produces("riscv-iommu-pci", "pci-device");
+ qos_node_consumes("riscv-iommu-pci", "pci-bus", &opts);
+}
+
+libqos_init(riscv_iommu_pci_register_nodes);
diff --git a/tests/qtest/riscv-iommu-test.c b/tests/qtest/riscv-iommu-test.c
new file mode 100644
index 0000000000..be72cf3d74
--- /dev/null
+++ b/tests/qtest/riscv-iommu-test.c
@@ -0,0 +1,85 @@
+/*
+ * QTest testcase for RISC-V IOMMU
+ *
+ * Copyright (c) 2024 Ventana Micro Systems Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at your
+ * option) any later version. See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest-single.h"
+#include "qemu/module.h"
+#include "libqos/qgraph.h"
+#include "libqos/riscv-iommu.h"
+#include "hw/pci/pci_regs.h"
+
+static uint32_t riscv_iommu_read_reg32(QRISCVIOMMU *r_iommu, int reg_offset)
+{
+ return qpci_io_readl(&r_iommu->dev, r_iommu->reg_bar, reg_offset);
+}
+
+static uint64_t riscv_iommu_read_reg64(QRISCVIOMMU *r_iommu, int reg_offset)
+{
+ return qpci_io_readq(&r_iommu->dev, r_iommu->reg_bar, reg_offset);
+}
+
+static void test_pci_config(void *obj, void *data, QGuestAllocator *t_alloc)
+{
+ QRISCVIOMMU *r_iommu = obj;
+ QPCIDevice *dev = &r_iommu->dev;
+ uint16_t vendorid, deviceid, classid;
+
+ vendorid = qpci_config_readw(dev, PCI_VENDOR_ID);
+ deviceid = qpci_config_readw(dev, PCI_DEVICE_ID);
+ classid = qpci_config_readw(dev, PCI_CLASS_DEVICE);
+
+ g_assert_cmpuint(vendorid, ==, RISCV_IOMMU_PCI_VENDOR_ID);
+ g_assert_cmpuint(deviceid, ==, RISCV_IOMMU_PCI_DEVICE_ID);
+ g_assert_cmpuint(classid, ==, RISCV_IOMMU_PCI_DEVICE_CLASS);
+}
+
+static void test_reg_reset(void *obj, void *data, QGuestAllocator *t_alloc)
+{
+ QRISCVIOMMU *r_iommu = obj;
+ uint64_t cap;
+ uint32_t reg;
+
+ cap = riscv_iommu_read_reg64(r_iommu, RISCV_IOMMU_REG_CAP);
+ g_assert_cmpuint(cap & RISCV_IOMMU_CAP_VERSION, ==, 0x10);
+
+ reg = riscv_iommu_read_reg32(r_iommu, RISCV_IOMMU_REG_CQCSR);
+ g_assert_cmpuint(reg & RISCV_IOMMU_CQCSR_CQEN, ==, 0);
+ g_assert_cmpuint(reg & RISCV_IOMMU_CQCSR_CIE, ==, 0);
+ g_assert_cmpuint(reg & RISCV_IOMMU_CQCSR_CQON, ==, 0);
+ g_assert_cmpuint(reg & RISCV_IOMMU_CQCSR_BUSY, ==, 0);
+
+ reg = riscv_iommu_read_reg32(r_iommu, RISCV_IOMMU_REG_FQCSR);
+ g_assert_cmpuint(reg & RISCV_IOMMU_FQCSR_FQEN, ==, 0);
+ g_assert_cmpuint(reg & RISCV_IOMMU_FQCSR_FIE, ==, 0);
+ g_assert_cmpuint(reg & RISCV_IOMMU_FQCSR_FQON, ==, 0);
+ g_assert_cmpuint(reg & RISCV_IOMMU_FQCSR_BUSY, ==, 0);
+
+ reg = riscv_iommu_read_reg32(r_iommu, RISCV_IOMMU_REG_PQCSR);
+ g_assert_cmpuint(reg & RISCV_IOMMU_PQCSR_PQEN, ==, 0);
+ g_assert_cmpuint(reg & RISCV_IOMMU_PQCSR_PIE, ==, 0);
+ g_assert_cmpuint(reg & RISCV_IOMMU_PQCSR_PQON, ==, 0);
+ g_assert_cmpuint(reg & RISCV_IOMMU_PQCSR_BUSY, ==, 0);
+
+ reg = riscv_iommu_read_reg32(r_iommu, RISCV_IOMMU_REG_DDTP);
+ g_assert_cmpuint(reg & RISCV_IOMMU_DDTP_BUSY, ==, 0);
+ g_assert_cmpuint(reg & RISCV_IOMMU_DDTP_MODE, ==,
+ RISCV_IOMMU_DDTP_MODE_OFF);
+
+ reg = riscv_iommu_read_reg32(r_iommu, RISCV_IOMMU_REG_IPSR);
+ g_assert_cmpuint(reg, ==, 0);
+}
+
+static void register_riscv_iommu_test(void)
+{
+ qos_add_test("pci_config", "riscv-iommu-pci", test_pci_config, NULL);
+ qos_add_test("reg_reset", "riscv-iommu-pci", test_reg_reset, NULL);
+}
+
+libqos_init(register_riscv_iommu_test);
diff --git a/tests/qtest/libqos/meson.build b/tests/qtest/libqos/meson.build
index 270439c2df..46f130ccfd 100644
--- a/tests/qtest/libqos/meson.build
+++ b/tests/qtest/libqos/meson.build
@@ -67,6 +67,10 @@ if have_virtfs
libqos_srcs += files('virtio-9p.c', 'virtio-9p-client.c')
endif
+if config_all_devices.has_key('CONFIG_RISCV_IOMMU')
+ libqos_srcs += files('riscv-iommu.c')
+endif
+
libqos = static_library('qos', libqos_srcs + genh,
build_by_default: false)
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index f7a19032f7..9d51114539 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -305,6 +305,7 @@ qos_test_ss.add(
'vmxnet3-test.c',
'igb-test.c',
'ufs-test.c',
+ 'riscv-iommu-test.c',
)
if config_all_devices.has_key('CONFIG_VIRTIO_SERIAL')
--
2.47.0