riscv/qemu - qemu - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Andrew Melnychenko	0cc14182ab	ebpf: Updated eBPF program and skeleton. Updated section name, so libbpf should init/gues proper program type without specifications during open/load. Also, added map_flags with explicitly declared BPF_F_MMAPABLE. Added check for BPF_F_MMAPABLE flag to meson script and requirements to libbpf version. Also changed fragmentation flag check - some TCP/UDP packets may be considered fragmented if DF flag is set. Signed-off-by: Andrew Melnychenko <andrew@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	2 years ago
Andrew Melnychenko	e88899fa90	qmp: Added new command to retrieve eBPF blob. Now, the binary objects may be retrieved by id. It would require for future qmp commands that may require specific eBPF blob. Added command "request-ebpf". This command returns eBPF program encoded base64. The program taken from the skeleton and essentially is an ELF object that can be loaded in the future with libbpf. The reason to use the command to provide the eBPF object instead of a separate artifact was to avoid issues related to finding the eBPF itself. eBPF object is an ELF binary that contains the eBPF program and eBPF map description(BTF). Overall, eBPF object should contain the program and enough metadata to create/load eBPF with libbpf. As the eBPF maps/program should correspond to QEMU, the eBPF can't be used from different QEMU build. The first solution was a helper that comes with QEMU and loads appropriate eBPF objects. And the issue is to find a proper helper if the system has several different QEMUs installed and/or built from the source, which helpers may not be compatible. Another issue is QEMU updating while there is a running QEMU instance. With an updated helper, it may not be possible to hotplug virtio-net device to the already running QEMU. Overall, requesting the eBPF object from QEMU itself solves possible failures with acceptable effort. Links: [PATCH 3/5] qmp: Added the helper stamp check. https://lore.kernel.org/all/20230219162100.174318-4-andrew@daynix.com/ Signed-off-by: Andrew Melnychenko <andrew@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	2 years ago
Andrew Melnychenko	0524ea0510	ebpf: Added eBPF initialization by fds. It allows using file descriptors of eBPF provided outside of QEMU. QEMU may be run without capabilities for eBPF and run RSS program provided by management tool(g.e. libvirt). Signed-off-by: Andrew Melnychenko <andrew@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	2 years ago
Andrew Melnychenko	333b3e5fab	ebpf: Added eBPF map update through mmap. Changed eBPF map updates through mmaped array. Mmaped arrays provide direct access to map data. It should omit using bpf_map_update_elem() call, which may require capabilities that are not present. Signed-off-by: Andrew Melnychenko <andrew@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	2 years ago
Thomas Huth	64a917d5d6	trace-events: Fix the name of the tracing.rst file The file has been converted to .rst a while ago - make sure that the references in the trace-events files are pointing to the right location now. Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>	3 years ago
Philippe Mathieu-Daudé	de6cd7599b	meson: Replace softmmu_ss -> system_ss We use the user_ss[] array to hold the user emulation sources, and the softmmu_ss[] array to hold the system emulation ones. Hold the latter in the 'system_ss[]' array for parity with user emulation. Mechanical change doing: $ sed -i -e s/softmmu_ss/system_ss/g $(git grep -l softmmu_ss) Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230613133347.82210-10-philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>	3 years ago
Shreesh Adiga	197a137290	ebpf: fix compatibility with libbpf 1.0+ The current implementation fails to load on a system with libbpf 1.0 and reports that legacy map definitions in 'maps' section are not supported by libbpf v1.0+. This commit updates the Makefile to add BTF (-g flag) and appropriately updates the maps in rss.bpf.c and update the skeleton file in repo. Signed-off-by: Shreesh Adiga <16567adigashreesh@gmail.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	3 years ago
Haochen Tong	a495eba03c	ebpf: replace deprecated bpf_program__set_socket_filter bpf_program__set_<TYPE> functions have been deprecated since libbpf 0.8. Replace with the equivalent bpf_program__set_type call to avoid a deprecation warning. Signed-off-by: Haochen Tong <i@hexchain.org> Reviewed-by: Zhang Chen <chen.zhang@intel.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	4 years ago
Paolo Bonzini	080832e4f4	ebpf: only include in system emulators eBPF files are being included in user emulators, which is useless and also breaks compilation because ebpf/trace-events is only processed if a system emulator is included in the build. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/566 Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	5 years ago
Andrew Melnychenko	46627f41b6	ebpf: Added eBPF RSS loader. Added function that loads RSS eBPF program. Added stub functions for RSS eBPF loader. Added meson and configuration options. By default, eBPF feature enabled if libbpf is present in the build system. libbpf checked in configuration shell script and meson script. Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com> Signed-off-by: Andrew Melnychenko <andrew@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	5 years ago