[PATCH v6 00/48] KVM: PPC: Book3S: C-ify the P9 entry/exit code
Nicholas Piggin
npiggin at gmail.com
Mon Apr 5 11:19:00 AEST 2021
Git tree here
https://github.com/npiggin/linux/tree/kvm-in-c-v6
This fixes a couple of bugs with the POWER7/8 path and now a
POWER8 SMT guest boots and runs again.
Main changes since v5:
- Fixed changelog and subject for patch to re-arm host timer.
- Fixed compile error with !HV [kernel test robot]
- Rearranged syscall interrupt reflection changes (now it's disabled in
the new P9 path, and reflection is later enabled for hash rather than
enabling by default and later disabling for radix).
- Fixed P9 hash ISI handler was testing MSR_DR, should be MSR_IR for
using the VRMA segment descriptor. Is this even needed for P9 hash
or does ASDR provide it for MMU=off faults?
- Fixed POWER8 path fault and cede/nap handler bugs, guests now work
again on POWER8 including SMT guests.
- Removed a bit more dead code from the P7/8 path (ultravisor).
- Improved changelog and comments.
Main changes since v4:
- Accounted for reviews so far. Comment and changelog fixes.
- Fix PR KVM register clobber [Paul]
- Fix HPT guest LPCR[TC] not set [Paul]
- Added comment about nested guest HV SPR leak issue [Paul]
- Improve misc comments and changelogs [Paul and Alexey]
- Fix decrementer_max export compile error [Alexey]
- Fixed issue with set_dec() not being identical to mtDEC causing
a patch to have an unintended change [Alexey]
- Re-add a patch to stop reflecting PR=1 sc 1, but only do it for radix.
Main changes since v3:
- Hopefully fixed LPCR sanising [from Fabiano review]
- Added MSR[HV] clearing of guest MSR (like MSR[ME] setting).
- Restored a lost comment about PPR saving, improved comments a bit
[Daniel review]
- Added isyncs, removed XXX isync comment.
- Fixed cede comment [Fabiano]
- In stop handling real mode handlers patch, fixed problem of nested
hcall handler calling cede and xics hcalls and consuming them
[Fabiano]
- Filter xics hcalls from being consumed if !kvmppc_xics_enabled
[Fabiano, Alexey noticed and Cedric provided the right recipe and
comment]
- Removed some more of radix, nested, and virt mode paths from the
P7/8 code [noticed by Alexey].
- Rebased on 5.12-rc4
- Hopefully I responded to all reviews and collected all reviewed-bys.
Thanks,
Nick
Nicholas Piggin (48):
KVM: PPC: Book3S HV: Nested move LPCR sanitising to sanitise_hv_regs
KVM: PPC: Book3S HV: Add a function to filter guest LPCR bits
KVM: PPC: Book3S HV: Disallow LPCR[AIL] to be set to 1 or 2
KVM: PPC: Book3S HV: Prevent radix guests 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 HV: Ensure MSR[HV] is always clear 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
KVM: PPC: Book3S HV P9: Reduce irq_work vs guest decrementer races
KMV: PPC: Book3S HV: Use set_dec to set decrementer to host
powerpc/time: add API for KVM to re-arm the host timer/decrementer
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: Remove virt mode checks from real mode handlers
KVM: PPC: Book3S HV: Remove unused nested HV tests in XICS emulation
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: Reflect userspace hcalls to hash guests to
support PR KVM
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.h | 2 +
arch/powerpc/include/asm/kvm_book3s_64.h | 8 +
arch/powerpc/include/asm/kvm_host.h | 8 +-
arch/powerpc/include/asm/kvm_ppc.h | 21 +-
arch/powerpc/include/asm/mmu_context.h | 6 -
arch/powerpc/include/asm/time.h | 11 +
arch/powerpc/kernel/asm-offsets.c | 1 -
arch/powerpc/kernel/exceptions-64s.S | 257 ++-----
arch/powerpc/kernel/security.c | 5 +-
arch/powerpc/kernel/time.c | 43 +-
arch/powerpc/kvm/Makefile | 4 +
arch/powerpc/kvm/book3s.c | 17 +-
arch/powerpc/kvm/book3s_64_entry.S | 409 +++++++++++
arch/powerpc/kvm/book3s_64_vio_hv.c | 12 -
arch/powerpc/kvm/book3s_hv.c | 782 ++++++++++++----------
arch/powerpc/kvm/book3s_hv_builtin.c | 138 +---
arch/powerpc/kvm/book3s_hv_interrupt.c | 529 +++++++++++++++
arch/powerpc/kvm/book3s_hv_interrupts.S | 9 +-
arch/powerpc/kvm/book3s_hv_nested.c | 37 +-
arch/powerpc/kvm/book3s_hv_ras.c | 2 +
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 15 +-
arch/powerpc/kvm/book3s_hv_rm_xics.c | 15 -
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 682 +------------------
arch/powerpc/kvm/book3s_segment.S | 3 +
arch/powerpc/kvm/book3s_xive.c | 113 +++-
arch/powerpc/kvm/book3s_xive.h | 7 -
arch/powerpc/kvm/book3s_xive_native.c | 10 -
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 +-
34 files changed, 1735 insertions(+), 1559 deletions(-)
create mode 100644 arch/powerpc/kvm/book3s_64_entry.S
create mode 100644 arch/powerpc/kvm/book3s_hv_interrupt.c
--
2.23.0
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