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
