On 13/10/21 18:56, Paolo Bonzini wrote:
This series, namely patches 1 and 8, fix two bugs in string I/O emulation for SEV-ES: - first, the length is completely off for "rep ins" and "rep outs" operation of size > 1. After setup_vmgexit_scratch, svm->ghcb_sa_len is in bytes, but kvm_sev_es_string_io expects the number of PIO operations. - second, the size of the GHCB buffer can exceed the size of vcpu->arch.pio_data. If that happens, we need to go over the GHCB buffer in multiple passes. The second bug was reported by Felix Wilhelm. The first was found by me by code inspection; on one hand it seems *too* egregious so I'll be gladly proven wrong on this, on the other hand... I know I'm bad at code review, but not _that_ bad.
Ping. Paolo
