powerpc/kvm: Enable HV KVM guests to use prefixed instructions to access emulated MMIO
Status from this message: Applied to powerpc/topic/ppc-kvm.
Get series with b4
b4 am ZAgsR04beDcARCiw@cleoVersions newest first
Patches in v1 Applied
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | powerpc/kvm: Make kvmppc_get_last_inst() produce a ppc_inst_tarch/ arch/ arch/ +6 more | +47 | 0 replies | |
| 2/3 | powerpc/kvm: Fetch prefixed instructions from the guestarch/ arch/ arch/ +8 more | +78 | 0 replies | |
| 3/3 | powerpc/kvm: Enable prefixed instructions for HV KVM and disable for PR KVMarch/ arch/ arch/ +1 more | +11 | 1 reply |
Reviews trailers per patch
All 3 patches have a Reviewed-by or Acked-by.
| Patch | Nicholas Piggin | Sachin Sant |
|---|---|---|
| 1/3 | R-b T-b | |
| 2/3 | R-b T-b | |
| 3/3 | R-b T-b | T-b |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH 0/3] powerpc/kvm: Enable HV KVM guests to use prefixed instructions to access emulated MMIO
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(-)