From f78069253ccf25c64e19e9889b98e499336f6c6e Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Fri, 3 Jul 2020 16:59:41 +0100 Subject: [PATCH] qdev: Introduce DEFINE_PROP_RESERVED_REGION Introduce a new property defining a reserved region: ::. 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 Reviewed-by: Markus Armbruster Reviewed-by: Michael S. Tsirkin Message-id: 20200629070404.10969-2-eric.auger@redhat.com Signed-off-by: Peter Maydell --- hw/core/qdev-properties.c | 89 ++++++++++++++++++++++++++++++++++++++++++++ include/exec/memory.h | 6 +++ include/hw/qdev-properties.h | 3 ++ include/qemu/typedefs.h | 1 + 4 files changed, 99 insertions(+) diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c index 71f8aca7c6..ca7771f307 100644 --- a/hw/core/qdev-properties.c +++ b/hw/core/qdev-properties.c @@ -15,6 +15,7 @@ #include "chardev/char.h" #include "qemu/uuid.h" #include "qemu/units.h" +#include "qemu/cutils.h" void qdev_prop_set_after_realize(DeviceState *dev, const char *name, Error **errp) @@ -578,6 +579,94 @@ const PropertyInfo qdev_prop_macaddr = { .set = set_mac, }; +/* --- Reserved Region --- */ + +/* + * Accepted syntax: + * :: + * where low/high addresses are uint64_t in hexadecimal + * and type is a non-negative decimal integer + */ +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; + int rc; + + rc = snprintf(buffer, sizeof(buffer), "0x%"PRIx64":0x%"PRIx64":%u", + rr->low, rr->high, rr->type); + assert(rc < sizeof(buffer)); + + 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, "start address of '%s'" + " must be a hexadecimal integer", name); + goto out; + } + if (*endptr != ':') { + goto separator_error; + } + + ret = qemu_strtou64(endptr + 1, &endptr, 16, &rr->high); + if (ret) { + error_setg(errp, "end address of '%s'" + " must be a hexadecimal integer", name); + goto out; + } + if (*endptr != ':') { + goto separator_error; + } + + ret = qemu_strtoui(endptr + 1, &endptr, 10, &rr->type); + if (ret) { + error_setg(errp, "type of '%s'" + " must be a non-negative decimal integer", name); + } + goto out; + +separator_error: + error_setg(errp, "reserved region fields must be separated with ':'"); +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 = { diff --git a/include/exec/memory.h b/include/exec/memory.h index 7207025bd4..84ee5b7a01 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -51,6 +51,12 @@ extern bool global_dirty_log; typedef struct MemoryRegionOps MemoryRegionOps; +struct ReservedRegion { + hwaddr low; + hwaddr high; + unsigned type; +}; + typedef struct IOMMUTLBEntry IOMMUTLBEntry; /* See address_space_translate: bit 0 is read, bit 1 is write. */ diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h index 49c6cd2460..944e3f2e0c 100644 --- a/include/hw/qdev-properties.h +++ b/include/hw/qdev-properties.h @@ -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; @@ -184,6 +185,8 @@ 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) \ diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h index ce4a78b687..15f5047bf1 100644 --- a/include/qemu/typedefs.h +++ b/include/qemu/typedefs.h @@ -58,6 +58,7 @@ 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; -- 2.11.0