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-rwxr-xr-xconfigure8
-rw-r--r--ebpf/ebpf_rss-stub.c40
-rw-r--r--ebpf/ebpf_rss.c165
-rw-r--r--ebpf/ebpf_rss.h44
-rw-r--r--ebpf/meson.build1
-rw-r--r--ebpf/rss.bpf.skeleton.h431
-rw-r--r--ebpf/trace-events4
-rw-r--r--ebpf/trace.h1
-rw-r--r--meson.build23
-rw-r--r--meson_options.txt2
10 files changed, 718 insertions, 1 deletions
diff --git a/configure b/configure
index 676239c697..c3b4bf6694 100755
--- a/configure
+++ b/configure
@@ -348,6 +348,7 @@ vhost_vsock="$default_feature"
vhost_user="no"
vhost_user_blk_server="auto"
vhost_user_fs="$default_feature"
+bpf="auto"
kvm="auto"
hax="auto"
hvf="auto"
@@ -1240,6 +1241,10 @@ for opt do
;;
--enable-membarrier) membarrier="yes"
;;
+ --disable-bpf) bpf="disabled"
+ ;;
+ --enable-bpf) bpf="enabled"
+ ;;
--disable-blobs) blobs="false"
;;
--with-pkgversion=*) pkgversion="$optarg"
@@ -1878,6 +1883,7 @@ disabled with --disable-FEATURE, default is enabled if available
vhost-user vhost-user backend support
vhost-user-blk-server vhost-user-blk server support
vhost-vdpa vhost-vdpa kernel backend support
+ bpf BPF kernel support
spice spice
spice-protocol spice-protocol
rbd rados block device (rbd)
@@ -6476,7 +6482,7 @@ if test "$skip_meson" = no; then
-Dattr=$attr -Ddefault_devices=$default_devices \
-Ddocs=$docs -Dsphinx_build=$sphinx_build -Dinstall_blobs=$blobs \
-Dvhost_user_blk_server=$vhost_user_blk_server -Dmultiprocess=$multiprocess \
- -Dfuse=$fuse -Dfuse_lseek=$fuse_lseek -Dguest_agent_msi=$guest_agent_msi \
+ -Dfuse=$fuse -Dfuse_lseek=$fuse_lseek -Dguest_agent_msi=$guest_agent_msi -Dbpf=$bpf\
$(if test "$default_features" = no; then echo "-Dauto_features=disabled"; fi) \
-Dtcg_interpreter=$tcg_interpreter \
$cross_arg \
diff --git a/ebpf/ebpf_rss-stub.c b/ebpf/ebpf_rss-stub.c
new file mode 100644
index 0000000000..e71e229190
--- /dev/null
+++ b/ebpf/ebpf_rss-stub.c
@@ -0,0 +1,40 @@
+/*
+ * eBPF RSS stub file
+ *
+ * Developed by Daynix Computing LTD (http://www.daynix.com)
+ *
+ * Authors:
+ * Yuri Benditovich <yuri.benditovich@daynix.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "ebpf/ebpf_rss.h"
+
+void ebpf_rss_init(struct EBPFRSSContext *ctx)
+{
+
+}
+
+bool ebpf_rss_is_loaded(struct EBPFRSSContext *ctx)
+{
+ return false;
+}
+
+bool ebpf_rss_load(struct EBPFRSSContext *ctx)
+{
+ return false;
+}
+
+bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config,
+ uint16_t *indirections_table, uint8_t *toeplitz_key)
+{
+ return false;
+}
+
+void ebpf_rss_unload(struct EBPFRSSContext *ctx)
+{
+
+}
diff --git a/ebpf/ebpf_rss.c b/ebpf/ebpf_rss.c
new file mode 100644
index 0000000000..118c68da83
--- /dev/null
+++ b/ebpf/ebpf_rss.c
@@ -0,0 +1,165 @@
+/*
+ * eBPF RSS loader
+ *
+ * Developed by Daynix Computing LTD (http://www.daynix.com)
+ *
+ * Authors:
+ * Andrew Melnychenko <andrew@daynix.com>
+ * Yuri Benditovich <yuri.benditovich@daynix.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/error-report.h"
+
+#include <bpf/libbpf.h>
+#include <bpf/bpf.h>
+
+#include "hw/virtio/virtio-net.h" /* VIRTIO_NET_RSS_MAX_TABLE_LEN */
+
+#include "ebpf/ebpf_rss.h"
+#include "ebpf/rss.bpf.skeleton.h"
+#include "trace.h"
+
+void ebpf_rss_init(struct EBPFRSSContext *ctx)
+{
+ if (ctx != NULL) {
+ ctx->obj = NULL;
+ }
+}
+
+bool ebpf_rss_is_loaded(struct EBPFRSSContext *ctx)
+{
+ return ctx != NULL && ctx->obj != NULL;
+}
+
+bool ebpf_rss_load(struct EBPFRSSContext *ctx)
+{
+ struct rss_bpf *rss_bpf_ctx;
+
+ if (ctx == NULL) {
+ return false;
+ }
+
+ rss_bpf_ctx = rss_bpf__open();
+ if (rss_bpf_ctx == NULL) {
+ trace_ebpf_error("eBPF RSS", "can not open eBPF RSS object");
+ goto error;
+ }
+
+ bpf_program__set_socket_filter(rss_bpf_ctx->progs.tun_rss_steering_prog);
+
+ if (rss_bpf__load(rss_bpf_ctx)) {
+ trace_ebpf_error("eBPF RSS", "can not load RSS program");
+ goto error;
+ }
+
+ ctx->obj = rss_bpf_ctx;
+ ctx->program_fd = bpf_program__fd(
+ rss_bpf_ctx->progs.tun_rss_steering_prog);
+ ctx->map_configuration = bpf_map__fd(
+ rss_bpf_ctx->maps.tap_rss_map_configurations);
+ ctx->map_indirections_table = bpf_map__fd(
+ rss_bpf_ctx->maps.tap_rss_map_indirection_table);
+ ctx->map_toeplitz_key = bpf_map__fd(
+ rss_bpf_ctx->maps.tap_rss_map_toeplitz_key);
+
+ return true;
+error:
+ rss_bpf__destroy(rss_bpf_ctx);
+ ctx->obj = NULL;
+
+ return false;
+}
+
+static bool ebpf_rss_set_config(struct EBPFRSSContext *ctx,
+ struct EBPFRSSConfig *config)
+{
+ uint32_t map_key = 0;
+
+ if (!ebpf_rss_is_loaded(ctx)) {
+ return false;
+ }
+ if (bpf_map_update_elem(ctx->map_configuration,
+ &map_key, config, 0) < 0) {
+ return false;
+ }
+ return true;
+}
+
+static bool ebpf_rss_set_indirections_table(struct EBPFRSSContext *ctx,
+ uint16_t *indirections_table,
+ size_t len)
+{
+ uint32_t i = 0;
+
+ if (!ebpf_rss_is_loaded(ctx) || indirections_table == NULL ||
+ len > VIRTIO_NET_RSS_MAX_TABLE_LEN) {
+ return false;
+ }
+
+ for (; i < len; ++i) {
+ if (bpf_map_update_elem(ctx->map_indirections_table, &i,
+ indirections_table + i, 0) < 0) {
+ return false;
+ }
+ }
+ return true;
+}
+
+static bool ebpf_rss_set_toepliz_key(struct EBPFRSSContext *ctx,
+ uint8_t *toeplitz_key)
+{
+ uint32_t map_key = 0;
+
+ /* prepare toeplitz key */
+ uint8_t toe[VIRTIO_NET_RSS_MAX_KEY_SIZE] = {};
+
+ if (!ebpf_rss_is_loaded(ctx) || toeplitz_key == NULL) {
+ return false;
+ }
+ memcpy(toe, toeplitz_key, VIRTIO_NET_RSS_MAX_KEY_SIZE);
+ *(uint32_t *)toe = ntohl(*(uint32_t *)toe);
+
+ if (bpf_map_update_elem(ctx->map_toeplitz_key, &map_key, toe,
+ 0) < 0) {
+ return false;
+ }
+ return true;
+}
+
+bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config,
+ uint16_t *indirections_table, uint8_t *toeplitz_key)
+{
+ if (!ebpf_rss_is_loaded(ctx) || config == NULL ||
+ indirections_table == NULL || toeplitz_key == NULL) {
+ return false;
+ }
+
+ if (!ebpf_rss_set_config(ctx, config)) {
+ return false;
+ }
+
+ if (!ebpf_rss_set_indirections_table(ctx, indirections_table,
+ config->indirections_len)) {
+ return false;
+ }
+
+ if (!ebpf_rss_set_toepliz_key(ctx, toeplitz_key)) {
+ return false;
+ }
+
+ return true;
+}
+
+void ebpf_rss_unload(struct EBPFRSSContext *ctx)
+{
+ if (!ebpf_rss_is_loaded(ctx)) {
+ return;
+ }
+
+ rss_bpf__destroy(ctx->obj);
+ ctx->obj = NULL;
+}
diff --git a/ebpf/ebpf_rss.h b/ebpf/ebpf_rss.h
new file mode 100644
index 0000000000..bf3f2572c7
--- /dev/null
+++ b/ebpf/ebpf_rss.h
@@ -0,0 +1,44 @@
+/*
+ * eBPF RSS header
+ *
+ * Developed by Daynix Computing LTD (http://www.daynix.com)
+ *
+ * Authors:
+ * Andrew Melnychenko <andrew@daynix.com>
+ * Yuri Benditovich <yuri.benditovich@daynix.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ */
+
+#ifndef QEMU_EBPF_RSS_H
+#define QEMU_EBPF_RSS_H
+
+struct EBPFRSSContext {
+ void *obj;
+ int program_fd;
+ int map_configuration;
+ int map_toeplitz_key;
+ int map_indirections_table;
+};
+
+struct EBPFRSSConfig {
+ uint8_t redirect;
+ uint8_t populate_hash;
+ uint32_t hash_types;
+ uint16_t indirections_len;
+ uint16_t default_queue;
+} __attribute__((packed));
+
+void ebpf_rss_init(struct EBPFRSSContext *ctx);
+
+bool ebpf_rss_is_loaded(struct EBPFRSSContext *ctx);
+
+bool ebpf_rss_load(struct EBPFRSSContext *ctx);
+
+bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config,
+ uint16_t *indirections_table, uint8_t *toeplitz_key);
+
+void ebpf_rss_unload(struct EBPFRSSContext *ctx);
+
+#endif /* QEMU_EBPF_RSS_H */
diff --git a/ebpf/meson.build b/ebpf/meson.build
new file mode 100644
index 0000000000..9cd0635370
--- /dev/null
+++ b/ebpf/meson.build
@@ -0,0 +1 @@
+common_ss.add(when: libbpf, if_true: files('ebpf_rss.c'), if_false: files('ebpf_rss-stub.c'))
diff --git a/ebpf/rss.bpf.skeleton.h b/ebpf/rss.bpf.skeleton.h
new file mode 100644
index 0000000000..126683eb87
--- /dev/null
+++ b/ebpf/rss.bpf.skeleton.h
@@ -0,0 +1,431 @@
+/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
+
+/* THIS FILE IS AUTOGENERATED! */
+#ifndef __RSS_BPF_SKEL_H__
+#define __RSS_BPF_SKEL_H__
+
+#include <stdlib.h>
+#include <bpf/libbpf.h>
+
+struct rss_bpf {
+ struct bpf_object_skeleton *skeleton;
+ struct bpf_object *obj;
+ struct {
+ struct bpf_map *tap_rss_map_configurations;
+ struct bpf_map *tap_rss_map_indirection_table;
+ struct bpf_map *tap_rss_map_toeplitz_key;
+ } maps;
+ struct {
+ struct bpf_program *tun_rss_steering_prog;
+ } progs;
+ struct {
+ struct bpf_link *tun_rss_steering_prog;
+ } links;
+};
+
+static void
+rss_bpf__destroy(struct rss_bpf *obj)
+{
+ if (!obj)
+ return;
+ if (obj->skeleton)
+ bpf_object__destroy_skeleton(obj->skeleton);
+ free(obj);
+}
+
+static inline int
+rss_bpf__create_skeleton(struct rss_bpf *obj);
+
+static inline struct rss_bpf *
+rss_bpf__open_opts(const struct bpf_object_open_opts *opts)
+{
+ struct rss_bpf *obj;
+
+ obj = (struct rss_bpf *)calloc(1, sizeof(*obj));
+ if (!obj)
+ return NULL;
+ if (rss_bpf__create_skeleton(obj))
+ goto err;
+ if (bpf_object__open_skeleton(obj->skeleton, opts))
+ goto err;
+
+ return obj;
+err:
+ rss_bpf__destroy(obj);
+ return NULL;
+}
+
+static inline struct rss_bpf *
+rss_bpf__open(void)
+{
+ return rss_bpf__open_opts(NULL);
+}
+
+static inline int
+rss_bpf__load(struct rss_bpf *obj)
+{
+ return bpf_object__load_skeleton(obj->skeleton);
+}
+
+static inline struct rss_bpf *
+rss_bpf__open_and_load(void)
+{
+ struct rss_bpf *obj;
+
+ obj = rss_bpf__open();
+ if (!obj)
+ return NULL;
+ if (rss_bpf__load(obj)) {
+ rss_bpf__destroy(obj);
+ return NULL;
+ }
+ return obj;
+}
+
+static inline int
+rss_bpf__attach(struct rss_bpf *obj)
+{
+ return bpf_object__attach_skeleton(obj->skeleton);
+}
+
+static inline void
+rss_bpf__detach(struct rss_bpf *obj)
+{
+ return bpf_object__detach_skeleton(obj->skeleton);
+}
+
+static inline int
+rss_bpf__create_skeleton(struct rss_bpf *obj)
+{
+ struct bpf_object_skeleton *s;
+
+ s = (struct bpf_object_skeleton *)calloc(1, sizeof(*s));
+ if (!s)
+ return -1;
+ obj->skeleton = s;
+
+ s->sz = sizeof(*s);
+ s->name = "rss_bpf";
+ s->obj = &obj->obj;
+
+ /* maps */
+ s->map_cnt = 3;
+ s->map_skel_sz = sizeof(*s->maps);
+ s->maps = (struct bpf_map_skeleton *)calloc(s->map_cnt, s->map_skel_sz);
+ if (!s->maps)
+ goto err;
+
+ s->maps[0].name = "tap_rss_map_configurations";
+ s->maps[0].map = &obj->maps.tap_rss_map_configurations;
+
+ s->maps[1].name = "tap_rss_map_indirection_table";
+ s->maps[1].map = &obj->maps.tap_rss_map_indirection_table;
+
+ s->maps[2].name = "tap_rss_map_toeplitz_key";
+ s->maps[2].map = &obj->maps.tap_rss_map_toeplitz_key;
+
+ /* programs */
+ s->prog_cnt = 1;
+ s->prog_skel_sz = sizeof(*s->progs);
+ s->progs = (struct bpf_prog_skeleton *)calloc(s->prog_cnt, s->prog_skel_sz);
+ if (!s->progs)
+ goto err;
+
+ s->progs[0].name = "tun_rss_steering_prog";
+ s->progs[0].prog = &obj->progs.tun_rss_steering_prog;
+ s->progs[0].link = &obj->links.tun_rss_steering_prog;
+
+ s->data_sz = 8088;
+ s->data = (void *)"\
+\x7f\x45\x4c\x46\x02\x01\x01\0\0\0\0\0\0\0\0\0\x01\0\xf7\0\x01\0\0\0\0\0\0\0\0\
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+\0\0\0\0\0\0\x63\x1a\xe0\xff\0\0\0\0\x7b\x1a\xd8\xff\0\0\0\0\x7b\x1a\xd0\xff\0\
+\0\0\0\xbf\xa3\0\0\0\0\0\0\x07\x03\0\0\xd0\xff\xff\xff\xbf\x81\0\0\0\0\0\0\x79\
+\xa2\x40\xff\0\0\0\0\xb7\x04\0\0\x14\0\0\0\xb7\x05\0\0\x01\0\0\0\x85\0\0\0\x44\
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+\0\0\0\x03\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\xa0\x1a\0\0\0\0\0\0\x71\x02\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x1a\0\0\0\x01\0\0\
+\0\x06\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x40\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\x04\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x5a\0\0\0\x01\0\0\0\x06\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\x40\0\0\0\0\0\0\0\xd8\x13\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x56\0\0\0\x09\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\x60\x1a\0\0\0\0\0\0\x30\0\0\0\0\0\0\0\x09\0\0\0\x03\0\0\0\x08\0\0\0\0\0\0\0\
+\x10\0\0\0\0\0\0\0\x20\0\0\0\x01\0\0\0\x03\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x18\
+\x14\0\0\0\0\0\0\x3c\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x04\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\x6c\0\0\0\x01\0\0\0\x03\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x54\x14\0\0\0\0\0\
+\0\x07\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x78\0\0\
+\0\x01\0\0\0\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x60\x14\0\0\0\0\0\0\x30\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x74\0\0\0\x09\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x90\x1a\0\0\0\0\0\0\x10\0\0\0\0\0\0\0\x09\0\0\0\
+\x07\0\0\0\x08\0\0\0\0\0\0\0\x10\0\0\0\0\0\0\0\xb2\0\0\0\x02\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\x90\x14\0\0\0\0\0\0\xd0\x05\0\0\0\0\0\0\x01\0\0\0\x39\0\0\
+\0\x08\0\0\0\0\0\0\0\x18\0\0\0\0\0\0\0";
+
+ return 0;
+err:
+ bpf_object__destroy_skeleton(s);
+ return -1;
+}
+
+#endif /* __RSS_BPF_SKEL_H__ */
diff --git a/ebpf/trace-events b/ebpf/trace-events
new file mode 100644
index 0000000000..411b1e2be3
--- /dev/null
+++ b/ebpf/trace-events
@@ -0,0 +1,4 @@
+# See docs/devel/tracing.txt for syntax documentation.
+
+# ebpf-rss.c
+ebpf_error(const char *s1, const char *s2) "error in %s: %s"
diff --git a/ebpf/trace.h b/ebpf/trace.h
new file mode 100644
index 0000000000..abefc46ab1
--- /dev/null
+++ b/ebpf/trace.h
@@ -0,0 +1 @@
+#include "trace/trace-ebpf.h"
diff --git a/meson.build b/meson.build
index 632b380738..bcbce8e164 100644
--- a/meson.build
+++ b/meson.build
@@ -1032,6 +1032,23 @@ if not get_option('fuse_lseek').disabled()
endif
endif
+# libbpf
+libbpf = dependency('libbpf', required: get_option('bpf'), method: 'pkg-config')
+if libbpf.found() and not cc.links('''
+ #include <bpf/libbpf.h>
+ int main(void)
+ {
+ bpf_object__destroy_skeleton(NULL);
+ return 0;
+ }''', dependencies: libbpf)
+ libbpf = not_found
+ if get_option('bpf').enabled()
+ error('libbpf skeleton test failed')
+ else
+ warning('libbpf skeleton test failed, disabling')
+ endif
+endif
+
if get_option('cfi')
cfi_flags=[]
# Check for dependency on LTO
@@ -1131,6 +1148,7 @@ endif
config_host_data.set('CONFIG_GTK', gtk.found())
config_host_data.set('CONFIG_LIBATTR', have_old_libattr)
config_host_data.set('CONFIG_LIBCAP_NG', libcap_ng.found())
+config_host_data.set('CONFIG_EBPF', libbpf.found())
config_host_data.set('CONFIG_LIBISCSI', libiscsi.found())
config_host_data.set('CONFIG_LIBNFS', libnfs.found())
config_host_data.set('CONFIG_RBD', rbd.found())
@@ -1800,6 +1818,7 @@ if have_system
'backends',
'backends/tpm',
'chardev',
+ 'ebpf',
'hw/9pfs',
'hw/acpi',
'hw/adc',
@@ -1992,6 +2011,9 @@ subdir('accel')
subdir('plugins')
subdir('bsd-user')
subdir('linux-user')
+subdir('ebpf')
+
+common_ss.add(libbpf)
bsd_user_ss.add(files('gdbstub.c'))
specific_ss.add_all(when: 'CONFIG_BSD_USER', if_true: bsd_user_ss)
@@ -2701,6 +2723,7 @@ summary_info += {'RDMA support': config_host.has_key('CONFIG_RDMA')}
summary_info += {'PVRDMA support': config_host.has_key('CONFIG_PVRDMA')}
summary_info += {'fdt support': fdt_opt == 'disabled' ? false : fdt_opt}
summary_info += {'libcap-ng support': libcap_ng.found()}
+summary_info += {'bpf support': libbpf.found()}
# TODO: add back protocol and server version
summary_info += {'spice support': config_host.has_key('CONFIG_SPICE')}
summary_info += {'rbd support': rbd.found()}
diff --git a/meson_options.txt b/meson_options.txt
index 91034420a1..3d304cac96 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -58,6 +58,8 @@ option('bzip2', type : 'feature', value : 'auto',
description: 'bzip2 support for DMG images')
option('cap_ng', type : 'feature', value : 'auto',
description: 'cap_ng support')
+option('bpf', type : 'feature', value : 'auto',
+ description: 'eBPF support')
option('cocoa', type : 'feature', value : 'auto',
description: 'Cocoa user interface (macOS only)')
option('curl', type : 'feature', value : 'auto',
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-14 03:21:43 +0000