@@ -57,6 +57,12 @@ struct MemoryRegionMmio {
CPUWriteMemoryFunc *write[3];
};
+struct ReservedRegion {
+ hwaddr low;
+ hwaddr high;
+ unsigned int type;
+};
+
typedef struct IOMMUTLBEntry IOMMUTLBEntry;
/* See address_space_translate: bit 0 is read, bit 1 is write. */
@@ -19,6 +19,7 @@ extern const PropertyInfo qdev_prop_string;
extern const PropertyInfo qdev_prop_chr;
extern const PropertyInfo qdev_prop_tpm;
extern const PropertyInfo qdev_prop_macaddr;
+extern const PropertyInfo qdev_prop_reserved_region;
extern const PropertyInfo qdev_prop_on_off_auto;
extern const PropertyInfo qdev_prop_multifd_compression;
extern const PropertyInfo qdev_prop_losttickpolicy;
@@ -183,6 +184,8 @@ extern const PropertyInfo qdev_prop_pcie_link_width;
DEFINE_PROP(_n, _s, _f, qdev_prop_drive_iothread, BlockBackend *)
#define DEFINE_PROP_MACADDR(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_macaddr, MACAddr)
+#define DEFINE_PROP_RESERVED_REGION(_n, _s, _f) \
+ DEFINE_PROP(_n, _s, _f, qdev_prop_reserved_region, ReservedRegion)
#define DEFINE_PROP_ON_OFF_AUTO(_n, _s, _f, _d) \
DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_on_off_auto, OnOffAuto)
#define DEFINE_PROP_MULTIFD_COMPRESSION(_n, _s, _f, _d) \
@@ -59,6 +59,7 @@ typedef struct ISABus ISABus;
typedef struct ISADevice ISADevice;
typedef struct IsaDma IsaDma;
typedef struct MACAddr MACAddr;
+typedef struct ReservedRegion ReservedRegion;
typedef struct MachineClass MachineClass;
typedef struct MachineState MachineState;
typedef struct MemoryListener MemoryListener;
@@ -14,6 +14,7 @@
#include "qapi/visitor.h"
#include "chardev/char.h"
#include "qemu/uuid.h"
+#include "qemu/cutils.h"
void qdev_prop_set_after_realize(DeviceState *dev, const char *name,
Error **errp)
@@ -577,6 +578,94 @@ const PropertyInfo qdev_prop_macaddr = {
.set = set_mac,
};
+/* --- Reserved Region --- */
+
+/*
+ * accepted syntax version:
+ * <low address>,<high address>,<type>
+ * where low/high addresses are uint64_t in hexadecimal
+ * and type is an unsigned integer in decimal
+ */
+static void get_reserved_region(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ DeviceState *dev = DEVICE(obj);
+ Property *prop = opaque;
+ ReservedRegion *rr = qdev_get_prop_ptr(dev, prop);
+ char buffer[64];
+ char *p = buffer;
+
+ snprintf(buffer, sizeof(buffer), "0x%"PRIx64",0x%"PRIx64",%u",
+ rr->low, rr->high, rr->type);
+
+ visit_type_str(v, name, &p, errp);
+}
+
+static void set_reserved_region(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ DeviceState *dev = DEVICE(obj);
+ Property *prop = opaque;
+ ReservedRegion *rr = qdev_get_prop_ptr(dev, prop);
+ Error *local_err = NULL;
+ const char *endptr;
+ char *str;
+ int ret;
+
+ if (dev->realized) {
+ qdev_prop_set_after_realize(dev, name, errp);
+ return;
+ }
+
+ visit_type_str(v, name, &str, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ ret = qemu_strtou64(str, &endptr, 16, &rr->low);
+ if (ret) {
+ error_setg(errp, "Failed to decode reserved region low addr");
+ error_append_hint(errp,
+ "should be an address in hexadecimal\n");
+ goto out;
+ }
+ if (*endptr != ',') {
+ goto separator_error;
+ }
+
+ ret = qemu_strtou64(endptr + 1, &endptr, 16, &rr->high);
+ if (ret) {
+ error_setg(errp, "Failed to decode reserved region high addr");
+ error_append_hint(errp,
+ "should be an address in hexadecimal\n");
+ goto out;
+ }
+ if (*endptr != ',') {
+ goto separator_error;
+ }
+
+ ret = qemu_strtoui(endptr + 1, &endptr, 10, &rr->type);
+ if (ret) {
+ error_setg(errp, "Failed to decode reserved region type");
+ error_append_hint(errp, "should be an unsigned integer in decimal\n");
+ }
+ goto out;
+
+separator_error:
+ error_setg(errp, "reserved region fields must be separated with commas");
+out:
+ g_free(str);
+ return;
+}
+
+const PropertyInfo qdev_prop_reserved_region = {
+ .name = "reserved_region",
+ .description = "Reserved Region, example: 0xFEE00000,0xFEEFFFFF,0",
+ .get = get_reserved_region,
+ .set = set_reserved_region,
+};
+
/* --- on/off/auto --- */
const PropertyInfo qdev_prop_on_off_auto = {
Introduce a new property defining a reserved region: <low address>, <high address>, <type>. This will be used to encode reserved IOVA regions. For instance, in virtio-iommu use case, reserved IOVA regions will be passed by the machine code to the virtio-iommu-pci device (an array of those). The type of the reserved region will match the virtio_iommu_probe_resv_mem subtype value: - VIRTIO_IOMMU_RESV_MEM_T_RESERVED (0) - VIRTIO_IOMMU_RESV_MEM_T_MSI (1) on PC/Q35 machine, this will be used to inform the virtio-iommu-pci device it should bypass the MSI region. The reserved region will be: 0xfee00000, 0xfeefffff, 1. On ARM, we can declare the ITS MSI doorbell as an MSI region to prevent MSIs from being mapped on guest side. Signed-off-by: Eric Auger <eric.auger@redhat.com> --- v11 -> v12: - rename into DEFINE_PROP_RESERVED_REGION - do not use g_strsplit anymore, use endptr instead - remove 0x references --- include/exec/memory.h | 6 +++ include/hw/qdev-properties.h | 3 ++ include/qemu/typedefs.h | 1 + hw/core/qdev-properties.c | 89 ++++++++++++++++++++++++++++++++++++ 4 files changed, 99 insertions(+)