Progress:

[VIRT-198 # QEMU: SVE Emulation Support ]

Another round of patches merged. About 25 remaing.

Implemented MOVPRFX, for which I had plans but forgot to actually implement. Discovered that the advance planning that I have added for this isn't really sufficient. For the purposes of initial upstreaming, I'll emulate them as plain moves.

With MOVPRFX done, feedback from Ori.Chalak@Huawei.com:

Thank you so much for the quick resolution. I have run successfully 466 tests of the OpenBLAS benchmark suite on the branch tag of Qemu you sent me, with SVE instructions compiled from C using ARM Compiler and Gnu linker. All pass without any failure. Did not verify functional correctness, just that all instructions are run by your Qemu branch in user mode and Qemu completes the job without a crash.

[Upstream]

Third iteration on splitting do_syscall. Patch review; pull request for Cota's tb_lock patch set. Tracked down a TB offset overflow affecting a softmmu NEON test case.

[GCC]

Sent some patches for MOVPRFX to Richard Sandiford. He offered to test them over the weekend before posting them to gcc-patches.