This series changes the powerpc KVM code so that HV KVM can fetch prefixed instructions from the guest in those situations where there is a need to emulate an instruction, which for HV KVM means emulating loads and stores to emulated MMIO devices. (Prefixed instructions were introduced with POWER10 and Power ISA v3.1, and consist of two 32-bit words, called the prefix and the suffix.) The instruction analysis code in arch/powerpc/lib/sstep.c has already been extended to handle prefixed loads and stores, so all we have to do in HV KVM is to fetch the suffix when necessary and pass it to analyse_instr(). Since PR KVM doesn't yet handle prefixed instructions, we disable PR KVM guests from using prefixed instructions (this is done using the FSCR). Paul. arch/powerpc/include/asm/kvm_host.h | 4 ++-- arch/powerpc/include/asm/kvm_ppc.h | 37 +++++++++++++++++++++++--------- arch/powerpc/include/asm/reg.h | 1 + arch/powerpc/kvm/book3s.c | 32 ++++++++++++++++++++++----- arch/powerpc/kvm/book3s_64_mmu_hv.c | 26 ++++++++++++++++------ arch/powerpc/kvm/book3s_hv.c | 24 ++++++++++++++------- arch/powerpc/kvm/book3s_hv_rmhandlers.S | 6 +++--- arch/powerpc/kvm/book3s_paired_singles.c | 4 +++- arch/powerpc/kvm/book3s_pr.c | 22 ++++++++++--------- arch/powerpc/kvm/book3s_rmhandlers.S | 1 + arch/powerpc/kvm/booke.c | 12 +++++++---- arch/powerpc/kvm/bookehv_interrupts.S | 2 +- arch/powerpc/kvm/e500_mmu_host.c | 4 ++-- arch/powerpc/kvm/emulate.c | 8 ++++++- arch/powerpc/kvm/emulate_loadstore.c | 8 +++---- arch/powerpc/kvm/powerpc.c | 4 ++-- 16 files changed, 136 insertions(+), 59 deletions(-)
