If a requestor device is connected to the IOPMP device, its memory access will
be checked by the IOPMP rule.
- Add 'iopmp=on' option to add an iopmp device and make the Generic PCI Express
Bridge connect to IOPMP.
Signed-off-by: Ethan Chen <etha...@andestech.com>
---
docs/system/riscv/virt.rst | 6 ++++
hw/riscv/Kconfig | 1 +
hw/riscv/virt.c | 57 ++++++++++++++++++++++++++++++++++++--
include/hw/riscv/virt.h | 5 +++-
4 files changed, 66 insertions(+), 3 deletions(-)
diff --git a/docs/system/riscv/virt.rst b/docs/system/riscv/virt.rst
index 9a06f95a34..3b2576f905 100644
--- a/docs/system/riscv/virt.rst
+++ b/docs/system/riscv/virt.rst
@@ -116,6 +116,12 @@ The following machine-specific options are supported:
having AIA IMSIC (i.e. "aia=aplic-imsic" selected). When not specified,
the default number of per-HART VS-level AIA IMSIC pages is 0.
+- iopmp=[on|off]
+
+ When this option is "on", an IOPMP device is added to machine. It checks dma
+ operations from the generic PCIe host bridge. This option is assumed to be
+ "off".
+
Running Linux kernel
--------------------
diff --git a/hw/riscv/Kconfig b/hw/riscv/Kconfig
index a2030e3a6f..0b45a5ade2 100644
--- a/hw/riscv/Kconfig
+++ b/hw/riscv/Kconfig
@@ -56,6 +56,7 @@ config RISCV_VIRT
select PLATFORM_BUS
select ACPI
select ACPI_PCI
+ select RISCV_IOPMP
config SHAKTI_C
bool
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 4fdb660525..53a1b71c71 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -55,6 +55,7 @@
#include "hw/acpi/aml-build.h"
#include "qapi/qapi-visit-common.h"
#include "hw/virtio/virtio-iommu.h"
+#include "hw/misc/riscv_iopmp.h"
/* KVM AIA only supports APLIC MSI. APLIC Wired is always emulated by QEMU. */
static bool virt_use_kvm_aia(RISCVVirtState *s)
@@ -82,6 +83,7 @@ static const MemMapEntry virt_memmap[] = {
[VIRT_UART0] = { 0x10000000, 0x100 },
[VIRT_VIRTIO] = { 0x10001000, 0x1000 },
[VIRT_FW_CFG] = { 0x10100000, 0x18 },
+ [VIRT_IOPMP] = { 0x10200000, 0x100000 },
[VIRT_FLASH] = { 0x20000000, 0x4000000 },
[VIRT_IMSIC_M] = { 0x24000000, VIRT_IMSIC_MAX_SIZE },
[VIRT_IMSIC_S] = { 0x28000000, VIRT_IMSIC_MAX_SIZE },
@@ -1006,6 +1008,24 @@ static void create_fdt_virtio_iommu(RISCVVirtState *s,
uint16_t bdf)
bdf + 1, iommu_phandle, bdf + 1, 0xffff - bdf);
}
+static void create_fdt_iopmp(RISCVVirtState *s, const MemMapEntry *memmap,
+ uint32_t irq_mmio_phandle) {
+ g_autofree char *name = NULL;
+ MachineState *ms = MACHINE(s);
+
+ name = g_strdup_printf("/soc/iopmp@%lx", (long)memmap[VIRT_IOPMP].base);
+ qemu_fdt_add_subnode(ms->fdt, name);
+ qemu_fdt_setprop_string(ms->fdt, name, "compatible", "riscv_iopmp");
+ qemu_fdt_setprop_cells(ms->fdt, name, "reg", 0x0, memmap[VIRT_IOPMP].base,
+ 0x0, memmap[VIRT_IOPMP].size);
+ qemu_fdt_setprop_cell(ms->fdt, name, "interrupt-parent", irq_mmio_phandle);
+ if (s->aia_type == VIRT_AIA_TYPE_NONE) {
+ qemu_fdt_setprop_cell(ms->fdt, name, "interrupts", IOPMP_IRQ);
+ } else {
+ qemu_fdt_setprop_cells(ms->fdt, name, "interrupts", IOPMP_IRQ, 0x4);
+ }
+}
+
static void finalize_fdt(RISCVVirtState *s)
{
uint32_t phandle = 1, irq_mmio_phandle = 1, msi_pcie_phandle = 1;
@@ -1024,6 +1044,10 @@ static void finalize_fdt(RISCVVirtState *s)
create_fdt_uart(s, virt_memmap, irq_mmio_phandle);
create_fdt_rtc(s, virt_memmap, irq_mmio_phandle);
+
+ if (s->have_iopmp) {
+ create_fdt_iopmp(s, virt_memmap, irq_mmio_phandle);
+ }
}
static void create_fdt(RISCVVirtState *s, const MemMapEntry *memmap)
@@ -1404,7 +1428,7 @@ static void virt_machine_init(MachineState *machine)
RISCVVirtState *s = RISCV_VIRT_MACHINE(machine);
MemoryRegion *system_memory = get_system_memory();
MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
- DeviceState *mmio_irqchip, *virtio_irqchip, *pcie_irqchip;
+ DeviceState *mmio_irqchip, *virtio_irqchip, *pcie_irqchip, *gpex_dev;
int i, base_hartid, hart_count;
int socket_count = riscv_socket_count(machine);
@@ -1570,7 +1594,7 @@ static void virt_machine_init(MachineState *machine)
qdev_get_gpio_in(virtio_irqchip, VIRTIO_IRQ + i));
}
- gpex_pcie_init(system_memory, pcie_irqchip, s);
+ gpex_dev = gpex_pcie_init(system_memory, pcie_irqchip, s);
create_platform_bus(s, mmio_irqchip);
@@ -1581,6 +1605,14 @@ static void virt_machine_init(MachineState *machine)
sysbus_create_simple("goldfish_rtc", memmap[VIRT_RTC].base,
qdev_get_gpio_in(mmio_irqchip, RTC_IRQ));
+ if (s->have_iopmp) {
+ DeviceState *iopmp_dev = sysbus_create_simple(TYPE_IOPMP,
+ memmap[VIRT_IOPMP].base,
+ qdev_get_gpio_in(DEVICE(mmio_irqchip), IOPMP_IRQ));
+
+ iopmp_setup_pci(iopmp_dev, PCI_HOST_BRIDGE(gpex_dev)->bus);
+ }
+
for (i = 0; i < ARRAY_SIZE(s->flash); i++) {
/* Map legacy -drive if=pflash to machine properties */
pflash_cfi01_legacy_drive(s->flash[i],
@@ -1684,6 +1716,21 @@ static void virt_set_aclint(Object *obj, bool value,
Error **errp)
s->have_aclint = value;
}
+static bool virt_get_iopmp(Object *obj, Error **errp)
+{
+ RISCVVirtState *s = RISCV_VIRT_MACHINE(obj);
+
+ return s->have_iopmp;
+}
+
+static void virt_set_iopmp(Object *obj, bool value, Error **errp)
+{
+ RISCVVirtState *s = RISCV_VIRT_MACHINE(obj);
+
+ s->have_iopmp = value;
+}
+
+
bool virt_is_acpi_enabled(RISCVVirtState *s)
{
return s->acpi != ON_OFF_AUTO_OFF;
@@ -1794,6 +1841,12 @@ static void virt_machine_class_init(ObjectClass *oc,
void *data)
NULL, NULL);
object_class_property_set_description(oc, "acpi",
"Enable ACPI");
+
+ object_class_property_add_bool(oc, "iopmp", virt_get_iopmp,
+ virt_set_iopmp);
+ object_class_property_set_description(oc, "iopmp",
+ "Set on/off to enable/disable "
+ "iopmp device");
}
static const TypeInfo virt_machine_typeinfo = {
diff --git a/include/hw/riscv/virt.h b/include/hw/riscv/virt.h
index 3db839160f..81460e29c4 100644
--- a/include/hw/riscv/virt.h
+++ b/include/hw/riscv/virt.h
@@ -55,6 +55,7 @@ struct RISCVVirtState {
int fdt_size;
bool have_aclint;
+ bool have_iopmp;
RISCVVirtAIAType aia_type;
int aia_guests;
char *oem_id;
@@ -84,12 +85,14 @@ enum {
VIRT_PCIE_MMIO,
VIRT_PCIE_PIO,
VIRT_PLATFORM_BUS,
- VIRT_PCIE_ECAM
+ VIRT_PCIE_ECAM,
+ VIRT_IOPMP,
};
enum {
UART0_IRQ = 10,
RTC_IRQ = 11,
+ IOPMP_IRQ = 12,
VIRTIO_IRQ = 1, /* 1 to 8 */
VIRTIO_COUNT = 8,
PCIE_IRQ = 0x20, /* 32 to 35 */
--
2.34.1
