mbox series

[v3,00/41] KVM: PPC: Book3S: C-ify the P9 entry/exit code

Message ID 20210305150638.2675513-1-npiggin@gmail.com
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Series KVM: PPC: Book3S: C-ify the P9 entry/exit code | expand

Message

Nicholas Piggin March 5, 2021, 3:05 p.m. UTC 
This tidies up things, and fixes a few corner cases and unfinished
"XXX:" bits. The major one being "bad host interrupt" detection and
handling (taking a MCE/SRESET while switching into guest regs) which
was missing previously from the new P9 path.

Adds a few new patches and makes some changes for issues noticed
by reviewers (thank you).

Thanks,
Nick

Nicholas Piggin (41):
  KVM: PPC: Book3S HV: Disallow LPCR[AIL] to be set to 1 or 2
  KVM: PPC: Book3S HV: Prevent radix guests from setting LPCR[TC]
  KVM: PPC: Book3S HV: Remove redundant mtspr PSPB
  KVM: PPC: Book3S HV: remove unused kvmppc_h_protect argument
  KVM: PPC: Book3S HV: Fix CONFIG_SPAPR_TCE_IOMMU=n default hcalls
  powerpc/64s: Remove KVM handler support from CBE_RAS interrupts
  powerpc/64s: remove KVM SKIP test from instruction breakpoint handler
  KVM: PPC: Book3S HV: Ensure MSR[ME] is always set in guest MSR
  KVM: PPC: Book3S 64: move KVM interrupt entry to a common entry point
  KVM: PPC: Book3S 64: Move GUEST_MODE_SKIP test into KVM
  KVM: PPC: Book3S 64: add hcall interrupt handler
  KVM: PPC: Book3S 64: Move hcall early register setup to KVM
  KVM: PPC: Book3S 64: Move interrupt early register setup to KVM
  KVM: PPC: Book3S 64: move bad_host_intr check to HV handler
  KVM: PPC: Book3S 64: Minimise hcall handler calling convention
    differences
  KVM: PPC: Book3S HV P9: Move radix MMU switching instructions together
  KVM: PPC: Book3S HV P9: implement kvmppc_xive_pull_vcpu in C
  KVM: PPC: Book3S HV P9: Move xive vcpu context management into
    kvmhv_p9_guest_entry
  KVM: PPC: Book3S HV P9: Stop handling hcalls in real-mode in the P9
    path
  KVM: PPC: Book3S HV P9: Move setting HDEC after switching to guest
    LPCR
  KVM: PPC: Book3S HV P9: Use large decrementer for HDEC
  KVM: PPC: Book3S HV P9: Use host timer accounting to avoid decrementer
    read   
  KVM: PPC: Book3S HV P9: Reduce mftb per guest entry/exit
  powerpc: add set_dec_or_work API for safely updating decrementer
  KVM: PPC: Book3S HV P9: Reduce irq_work vs guest decrementer races
  KVM: PPC: Book3S HV P9: Implement the rest of the P9 path in C
  KVM: PPC: Book3S HV P9: inline kvmhv_load_hv_regs_and_go into
    __kvmhv_vcpu_entry_p9
  KVM: PPC: Book3S HV P9: Read machine check registers while MSR[RI] is
    0
  KVM: PPC: Book3S HV P9: Improve exit timing accounting coverage
  KVM: PPC: Book3S HV P9: Move SPR loading after expiry time check
  KVM: PPC: Book3S HV P9: Add helpers for OS SPR handling
  KVM: PPC: Book3S HV P9: Switch to guest MMU context as late as
    possible
  KVM: PPC: Book3S HV: Implement radix prefetch workaround by disabling
    MMU
  KVM: PPC: Book3S HV: Remove support for dependent threads mode on P9
  KVM: PPC: Book3S HV: Remove radix guest support from P7/8 path
  KVM: PPC: Book3S HV P9: Allow all P9 processors to enable nested HV
  KVM: PPC: Book3S HV: small pseries_do_hcall cleanup
  KVM: PPC: Book3S HV: add virtual mode handlers for HPT hcalls and page
    faults
  KVM: PPC: Book3S HV P9: implement hash guest support
  KVM: PPC: Book3S HV P9: implement hash host / hash guest support
  KVM: PPC: Book3S HV: remove ISA v3.0 and v3.1 support from P7/8 path

 arch/powerpc/include/asm/asm-prototypes.h |   3 +-
 arch/powerpc/include/asm/exception-64s.h  |  13 +
 arch/powerpc/include/asm/kvm_asm.h        |   3 +-
 arch/powerpc/include/asm/kvm_book3s_64.h  |   8 +
 arch/powerpc/include/asm/kvm_host.h       |   1 -
 arch/powerpc/include/asm/kvm_ppc.h        |  10 +-
 arch/powerpc/include/asm/mmu_context.h    |   6 -
 arch/powerpc/include/asm/time.h           |  16 +
 arch/powerpc/kernel/exceptions-64s.S      | 262 ++-------
 arch/powerpc/kernel/security.c            |   5 +-
 arch/powerpc/kernel/time.c                |  21 +-
 arch/powerpc/kvm/Makefile                 |   6 +
 arch/powerpc/kvm/book3s_64_entry.S        | 368 ++++++++++++
 arch/powerpc/kvm/book3s_hv.c              | 669 +++++++++++-----------
 arch/powerpc/kvm/book3s_hv_builtin.c      |   6 +
 arch/powerpc/kvm/book3s_hv_interrupt.c    | 519 +++++++++++++++++
 arch/powerpc/kvm/book3s_hv_interrupts.S   |   9 +-
 arch/powerpc/kvm/book3s_hv_nested.c       |  10 +-
 arch/powerpc/kvm/book3s_hv_ras.c          |   2 +
 arch/powerpc/kvm/book3s_hv_rm_mmu.c       |  15 +-
 arch/powerpc/kvm/book3s_hv_rmhandlers.S   | 625 +-------------------
 arch/powerpc/kvm/book3s_segment.S         |   7 +
 arch/powerpc/kvm/book3s_xive.c            |  91 +++
 arch/powerpc/mm/book3s64/radix_pgtable.c  |  27 +-
 arch/powerpc/mm/book3s64/radix_tlb.c      |  46 --
 arch/powerpc/mm/mmu_context.c             |   4 +-
 arch/powerpc/platforms/powernv/idle.c     |  52 +-
 27 files changed, 1506 insertions(+), 1298 deletions(-)
 create mode 100644 arch/powerpc/kvm/book3s_64_entry.S
 create mode 100644 arch/powerpc/kvm/book3s_hv_interrupt.c

Comments

Nicholas Piggin March 16, 2021, 6:06 a.m. UTC | #1 
Excerpts from Nicholas Piggin's message of March 6, 2021 1:05 am:
> This tidies up things, and fixes a few corner cases and unfinished
> "XXX:" bits. The major one being "bad host interrupt" detection and
> handling (taking a MCE/SRESET while switching into guest regs) which
> was missing previously from the new P9 path.
> 
> Adds a few new patches and makes some changes for issues noticed
> by reviewers (thank you).

I've put a tree up here with latest changes.

https://github.com/npiggin/linux/tree/kvm-in-c

Should include all the review comments from this thread so far, no
other major changes.

I'll hold off posting out another series probably at least until
powerpc next solidifies a bit more (some of the interrupt handler
changes pending there might clash).

Thanks,
Nick