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-rw-r--r--backends/Makefile.objs2
-rw-r--r--backends/rng-builtin.c77
-rw-r--r--contrib/libvhost-user/libvhost-user.c19
-rw-r--r--hw/core/machine.c4
-rw-r--r--hw/virtio/virtio-pci.c10
-rw-r--r--hw/virtio/virtio-pci.h4
-rw-r--r--hw/virtio/virtio-rng.c19
-rw-r--r--include/hw/virtio/virtio-rng.h2
-rw-r--r--include/sysemu/rng.h2
-rw-r--r--qemu-options.hx7
10 files changed, 122 insertions, 24 deletions
diff --git a/backends/Makefile.objs b/backends/Makefile.objs
index 981e8e122f..f0691116e8 100644
--- a/backends/Makefile.objs
+++ b/backends/Makefile.objs
@@ -1,4 +1,4 @@
-common-obj-y += rng.o rng-egd.o
+common-obj-y += rng.o rng-egd.o rng-builtin.o
common-obj-$(CONFIG_POSIX) += rng-random.o
common-obj-$(CONFIG_TPM) += tpm.o
diff --git a/backends/rng-builtin.c b/backends/rng-builtin.c
new file mode 100644
index 0000000000..ba1b8d66b8
--- /dev/null
+++ b/backends/rng-builtin.c
@@ -0,0 +1,77 @@
+/*
+ * QEMU Builtin Random Number Generator Backend
+ *
+ * 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 "sysemu/rng.h"
+#include "qemu/main-loop.h"
+#include "qemu/guest-random.h"
+
+#define RNG_BUILTIN(obj) OBJECT_CHECK(RngBuiltin, (obj), TYPE_RNG_BUILTIN)
+
+typedef struct RngBuiltin {
+ RngBackend parent;
+ QEMUBH *bh;
+} RngBuiltin;
+
+static void rng_builtin_receive_entropy_bh(void *opaque)
+{
+ RngBuiltin *s = opaque;
+
+ while (!QSIMPLEQ_EMPTY(&s->parent.requests)) {
+ RngRequest *req = QSIMPLEQ_FIRST(&s->parent.requests);
+
+ qemu_guest_getrandom_nofail(req->data, req->size);
+
+ req->receive_entropy(req->opaque, req->data, req->size);
+
+ rng_backend_finalize_request(&s->parent, req);
+ }
+}
+
+static void rng_builtin_request_entropy(RngBackend *b, RngRequest *req)
+{
+ RngBuiltin *s = RNG_BUILTIN(b);
+
+ qemu_bh_schedule(s->bh);
+}
+
+static void rng_builtin_init(Object *obj)
+{
+ RngBuiltin *s = RNG_BUILTIN(obj);
+
+ s->bh = qemu_bh_new(rng_builtin_receive_entropy_bh, s);
+}
+
+static void rng_builtin_finalize(Object *obj)
+{
+ RngBuiltin *s = RNG_BUILTIN(obj);
+
+ qemu_bh_delete(s->bh);
+}
+
+static void rng_builtin_class_init(ObjectClass *klass, void *data)
+{
+ RngBackendClass *rbc = RNG_BACKEND_CLASS(klass);
+
+ rbc->request_entropy = rng_builtin_request_entropy;
+}
+
+static const TypeInfo rng_builtin_info = {
+ .name = TYPE_RNG_BUILTIN,
+ .parent = TYPE_RNG_BACKEND,
+ .instance_size = sizeof(RngBuiltin),
+ .instance_init = rng_builtin_init,
+ .instance_finalize = rng_builtin_finalize,
+ .class_init = rng_builtin_class_init,
+};
+
+static void register_types(void)
+{
+ type_register_static(&rng_builtin_info);
+}
+
+type_init(register_types);
diff --git a/contrib/libvhost-user/libvhost-user.c b/contrib/libvhost-user/libvhost-user.c
index 4b36e35a82..68c27136ae 100644
--- a/contrib/libvhost-user/libvhost-user.c
+++ b/contrib/libvhost-user/libvhost-user.c
@@ -94,6 +94,11 @@ bool vu_has_feature(VuDev *dev,
return has_feature(dev->features, fbit);
}
+static inline bool vu_has_protocol_feature(VuDev *dev, unsigned int fbit)
+{
+ return has_feature(dev->protocol_features, fbit);
+}
+
static const char *
vu_request_to_string(unsigned int req)
{
@@ -951,8 +956,7 @@ vu_check_queue_inflights(VuDev *dev, VuVirtq *vq)
{
int i = 0;
- if (!has_feature(dev->protocol_features,
- VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)) {
+ if (!vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)) {
return 0;
}
@@ -1097,7 +1101,7 @@ bool vu_set_queue_host_notifier(VuDev *dev, VuVirtq *vq, int fd,
vmsg.fd_num = fd_num;
- if ((dev->protocol_features & VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD) == 0) {
+ if (!vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) {
return false;
}
@@ -2190,8 +2194,7 @@ vu_queue_map_desc(VuDev *dev, VuVirtq *vq, unsigned int idx, size_t sz)
static int
vu_queue_inflight_get(VuDev *dev, VuVirtq *vq, int desc_idx)
{
- if (!has_feature(dev->protocol_features,
- VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)) {
+ if (!vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)) {
return 0;
}
@@ -2208,8 +2211,7 @@ vu_queue_inflight_get(VuDev *dev, VuVirtq *vq, int desc_idx)
static int
vu_queue_inflight_pre_put(VuDev *dev, VuVirtq *vq, int desc_idx)
{
- if (!has_feature(dev->protocol_features,
- VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)) {
+ if (!vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)) {
return 0;
}
@@ -2225,8 +2227,7 @@ vu_queue_inflight_pre_put(VuDev *dev, VuVirtq *vq, int desc_idx)
static int
vu_queue_inflight_post_put(VuDev *dev, VuVirtq *vq, int desc_idx)
{
- if (!has_feature(dev->protocol_features,
- VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)) {
+ if (!vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)) {
return 0;
}
diff --git a/hw/core/machine.c b/hw/core/machine.c
index c5e0d52fbc..1689ad3bf8 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -27,7 +27,9 @@
#include "hw/pci/pci.h"
#include "hw/mem/nvdimm.h"
-GlobalProperty hw_compat_4_1[] = {};
+GlobalProperty hw_compat_4_1[] = {
+ { "virtio-pci", "x-pcie-flr-init", "off" },
+};
const size_t hw_compat_4_1_len = G_N_ELEMENTS(hw_compat_4_1);
GlobalProperty hw_compat_4_0[] = {
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index ffb03728f9..c6b47a9c73 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -604,6 +604,10 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
pci_default_write_config(pci_dev, address, val, len);
+ if (proxy->flags & VIRTIO_PCI_FLAG_INIT_FLR) {
+ pcie_cap_flr_write_config(pci_dev, address, val, len);
+ }
+
if (range_covers_byte(address, len, PCI_COMMAND) &&
!(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
virtio_pci_stop_ioeventfd(proxy);
@@ -1780,6 +1784,10 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
pcie_ats_init(pci_dev, 256);
}
+ if (proxy->flags & VIRTIO_PCI_FLAG_INIT_FLR) {
+ /* Set Function Level Reset capability bit */
+ pcie_cap_flr_init(pci_dev);
+ }
} else {
/*
* make future invocations of pci_is_express() return false
@@ -1847,6 +1855,8 @@ static Property virtio_pci_properties[] = {
VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT, true),
DEFINE_PROP_BIT("x-pcie-pm-init", VirtIOPCIProxy, flags,
VIRTIO_PCI_FLAG_INIT_PM_BIT, true),
+ DEFINE_PROP_BIT("x-pcie-flr-init", VirtIOPCIProxy, flags,
+ VIRTIO_PCI_FLAG_INIT_FLR_BIT, true),
DEFINE_PROP_END_OF_LIST(),
};
diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h
index 292275acb1..e2eaaa9182 100644
--- a/hw/virtio/virtio-pci.h
+++ b/hw/virtio/virtio-pci.h
@@ -44,6 +44,7 @@ enum {
VIRTIO_PCI_FLAG_INIT_DEVERR_BIT,
VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT,
VIRTIO_PCI_FLAG_INIT_PM_BIT,
+ VIRTIO_PCI_FLAG_INIT_FLR_BIT,
};
/* Need to activate work-arounds for buggy guests at vmstate load. */
@@ -80,6 +81,9 @@ enum {
/* Init Power Management */
#define VIRTIO_PCI_FLAG_INIT_PM (1 << VIRTIO_PCI_FLAG_INIT_PM_BIT)
+/* Init Function Level Reset capability */
+#define VIRTIO_PCI_FLAG_INIT_FLR (1 << VIRTIO_PCI_FLAG_INIT_FLR_BIT)
+
typedef struct {
MSIMessage msg;
int virq;
diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c
index d1650e1dee..e93bed020f 100644
--- a/hw/virtio/virtio-rng.c
+++ b/hw/virtio/virtio-rng.c
@@ -192,27 +192,24 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
}
if (vrng->conf.rng == NULL) {
- vrng->conf.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM));
+ Object *default_backend = object_new(TYPE_RNG_BUILTIN);
- user_creatable_complete(USER_CREATABLE(vrng->conf.default_backend),
+ user_creatable_complete(USER_CREATABLE(default_backend),
&local_err);
if (local_err) {
error_propagate(errp, local_err);
- object_unref(OBJECT(vrng->conf.default_backend));
+ object_unref(default_backend);
return;
}
- object_property_add_child(OBJECT(dev),
- "default-backend",
- OBJECT(vrng->conf.default_backend),
- NULL);
+ object_property_add_child(OBJECT(dev), "default-backend",
+ default_backend, &error_abort);
/* The child property took a reference, we can safely drop ours now */
- object_unref(OBJECT(vrng->conf.default_backend));
+ object_unref(default_backend);
- object_property_set_link(OBJECT(dev),
- OBJECT(vrng->conf.default_backend),
- "rng", NULL);
+ object_property_set_link(OBJECT(dev), default_backend,
+ "rng", &error_abort);
}
vrng->rng = vrng->conf.rng;
diff --git a/include/hw/virtio/virtio-rng.h b/include/hw/virtio/virtio-rng.h
index ff699335e3..bd05d734b8 100644
--- a/include/hw/virtio/virtio-rng.h
+++ b/include/hw/virtio/virtio-rng.h
@@ -14,7 +14,6 @@
#include "hw/virtio/virtio.h"
#include "sysemu/rng.h"
-#include "sysemu/rng-random.h"
#include "standard-headers/linux/virtio_rng.h"
#define TYPE_VIRTIO_RNG "virtio-rng-device"
@@ -27,7 +26,6 @@ struct VirtIORNGConf {
RngBackend *rng;
uint64_t max_bytes;
uint32_t period_ms;
- RngRandom *default_backend;
};
typedef struct VirtIORNG {
diff --git a/include/sysemu/rng.h b/include/sysemu/rng.h
index 9b22c156f8..fa6eada78c 100644
--- a/include/sysemu/rng.h
+++ b/include/sysemu/rng.h
@@ -24,6 +24,8 @@
#define RNG_BACKEND_CLASS(klass) \
OBJECT_CLASS_CHECK(RngBackendClass, (klass), TYPE_RNG_BACKEND)
+#define TYPE_RNG_BUILTIN "rng-builtin"
+
typedef struct RngRequest RngRequest;
typedef struct RngBackendClass RngBackendClass;
typedef struct RngBackend RngBackend;
diff --git a/qemu-options.hx b/qemu-options.hx
index ea0638e92d..b2ba7c501d 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -4332,6 +4332,13 @@ other options.
The @option{share} boolean option is @var{on} by default with memfd.
+@item -object rng-builtin,id=@var{id}
+
+Creates a random number generator backend which obtains entropy from
+QEMU builtin functions. The @option{id} parameter is a unique ID that
+will be used to reference this entropy backend from the @option{virtio-rng}
+device. By default, the @option{virtio-rng} device uses this RNG backend.
+
@item -object rng-random,id=@var{id},filename=@var{/dev/random}
Creates a random number generator backend which obtains entropy from
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-25 16:35:21 +0000