qemu/tools, branch master

qemu-vmsr-helper: implement --verbose/-v

2024-07-31T11:15:06Z

Similar to qemu-pr-helper, do not print errors from the socket handling loop unless a --verbose or -v option is provided explicitly on the command line. Signed-off-by: Paolo Bonzini

qemu-vmsr-helper: fix socket loop breakage

2024-07-31T11:14:52Z

Between v5 and v6 of the series, the socket loop of qemu-vmsr-helper was changed to allow sending multiple requests on the same socket. Unfortunately, the condition of the while loop is botched and the loop will never be entered. Clean it up, and also unify the handling of error reporting. Signed-off-by: Paolo Bonzini

tools: build qemu-vmsr-helper

2024-07-22T11:50:21Z

Introduce a privileged helper to access RAPL MSR. The privileged helper tool, qemu-vmsr-helper, is designed to provide virtual machines with the ability to read specific RAPL (Running Average Power Limit) MSRs without requiring CAP_SYS_RAWIO privileges or relying on external, out-of-tree patches. The helper tool leverages Unix permissions and SO_PEERCRED socket options to enforce access control, ensuring that only processes explicitly requesting read access via readmsr() from a valid Thread ID can access these MSRs. The list of RAPL MSRs that are allowed to be read by the helper tool is defined in rapl-msr-index.h. This list corresponds to the RAPL MSRs that will be supported in the next commit titled "Add support for RAPL MSRs in KVM/QEMU." The tool is intentionally designed to run on the Linux x86 platform. This initial implementation is tailored for Intel CPUs but can be extended to support AMD CPUs in the future. Signed-off-by: Anthony Harivel Link: https://lore.kernel.org/r/20240522153453.1230389-3-aharivel@redhat.com Signed-off-by: Paolo Bonzini

ebpf: Add a separate target for skeleton

2024-06-04T07:14:26Z

This generalizes the rule to generate the skeleton and allows to add another. Signed-off-by: Akihiko Odaki Signed-off-by: Jason Wang

ebpf: Refactor tun_rss_steering_prog()

2024-06-04T07:14:26Z

This saves branches and makes later BPF program changes easier. Signed-off-by: Akihiko Odaki Signed-off-by: Jason Wang

ebpf: Return 0 when configuration fails

2024-06-04T07:14:26Z

The kernel interprets the returned value as an unsigned 32-bit so -1 will mean queue 4294967295, which is awkward. Return 0 instead. Signed-off-by: Akihiko Odaki Signed-off-by: Jason Wang

ebpf: Fix RSS error handling

2024-06-04T07:14:26Z

calculate_rss_hash() was using hash value 0 to tell if it calculated a hash, but the hash value may be 0 on a rare occasion. Have a distinct bool value for correctness. Fixes: f3fa412de2 ("ebpf: Added eBPF RSS program.") Signed-off-by: Akihiko Odaki Signed-off-by: Jason Wang

ebpf: Updated eBPF program and skeleton.

2024-03-12T11:31:47Z

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 Signed-off-by: Jason Wang

ebpf: fix compatibility with libbpf 1.0+

2023-03-10T09:26:47Z

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

virtiofsd: Remove source

2023-02-16T18:15:08Z

Now remove all the source. Signed-off-by: Dr. David Alan Gilbert Acked-by: Stefan Hajnoczi