From: Arnd Bergmann <[email protected]>
I submitted a patch to remove KVM support for x86-32 hosts earlier
this month, but there were still concerns that this might be useful for
testing 32-bit host in general, as that remains supported on three other
architectures. I have gone through those three now and prepared similar
patches, as all of them seem to be equally obsolete.
Support for 32-bit KVM host on Arm hardware was dropped back in 2020
because of lack of users, despite Cortex-A7/A15/A17 based SoCs being
much more widely deployed than the other virtualization capable 32-bit
CPUs (Intel Core Duo/Silverthorne, PowerPC e300/e500/e600, MIPS P5600)
combined.
It probably makes sense to drop all of these at the same time, provided
there are no actual users remaining (not counting regression testing
that developers might be doing). Please let me know if you are still
using any of these machines, or think there needs to be deprecation
phase first.
Arnd
Link: https://lore.kernel.org/lkml/[email protected]/
Cc: Thomas Bogendoerfer <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: Jiaxun Yang <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Naveen N Rao <[email protected]>
Cc: Madhavan Srinivasan <[email protected]>
Cc: Alexander Graf <[email protected]>
Cc: Crystal Wood <[email protected]>
Cc: Anup Patel <[email protected]>
Cc: Atish Patra <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Sean Christopherson <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: [email protected]
Cc: "H. Peter Anvin" <[email protected]>
Cc: Vitaly Kuznetsov <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Paul Durrant <[email protected]>
Cc: Marc Zyngier <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Arnd Bergmann (5):
mips: kvm: drop support for 32-bit hosts
powerpc: kvm: drop 32-bit booke
powerpc: kvm: drop 32-bit book3s
riscv: kvm: drop 32-bit host support
x86: kvm drop 32-bit host support
MAINTAINERS | 2 +-
arch/mips/Kconfig | 3 -
arch/mips/include/asm/kvm_host.h | 4 -
arch/mips/kvm/Kconfig | 1 +
arch/mips/kvm/emulate.c | 8 -
arch/mips/kvm/msa.S | 12 -
arch/mips/kvm/vz.c | 22 -
arch/powerpc/include/asm/kvm_book3s.h | 19 -
arch/powerpc/include/asm/kvm_book3s_32.h | 36 --
arch/powerpc/include/asm/kvm_book3s_asm.h | 10 -
arch/powerpc/include/asm/kvm_booke.h | 4 -
arch/powerpc/include/asm/kvm_booke_hv_asm.h | 2 -
arch/powerpc/kvm/Kconfig | 44 +-
arch/powerpc/kvm/Makefile | 30 --
arch/powerpc/kvm/book3s.c | 18 -
arch/powerpc/kvm/book3s_32_mmu_host.c | 396 --------------
arch/powerpc/kvm/book3s_emulate.c | 37 --
arch/powerpc/kvm/book3s_interrupts.S | 11 -
arch/powerpc/kvm/book3s_mmu_hpte.c | 12 -
arch/powerpc/kvm/book3s_pr.c | 122 +----
arch/powerpc/kvm/book3s_rmhandlers.S | 110 ----
arch/powerpc/kvm/book3s_segment.S | 30 +-
arch/powerpc/kvm/booke.c | 264 ----------
arch/powerpc/kvm/booke.h | 8 -
arch/powerpc/kvm/booke_emulate.c | 44 --
arch/powerpc/kvm/booke_interrupts.S | 535 -------------------
arch/powerpc/kvm/bookehv_interrupts.S | 10 -
arch/powerpc/kvm/e500.c | 553 --------------------
arch/powerpc/kvm/e500.h | 40 --
arch/powerpc/kvm/e500_emulate.c | 100 ----
arch/powerpc/kvm/e500_mmu_host.c | 54 --
arch/powerpc/kvm/e500mc.c | 5 +-
arch/powerpc/kvm/emulate.c | 2 -
arch/powerpc/kvm/powerpc.c | 2 -
arch/powerpc/kvm/trace_booke.h | 14 -
arch/riscv/kvm/Kconfig | 2 +-
arch/riscv/kvm/aia.c | 105 ----
arch/riscv/kvm/aia_imsic.c | 34 --
arch/riscv/kvm/mmu.c | 8 -
arch/riscv/kvm/vcpu_exit.c | 4 -
arch/riscv/kvm/vcpu_insn.c | 12 -
arch/riscv/kvm/vcpu_sbi_pmu.c | 8 -
arch/riscv/kvm/vcpu_sbi_replace.c | 4 -
arch/riscv/kvm/vcpu_sbi_v01.c | 4 -
arch/riscv/kvm/vcpu_timer.c | 20 -
arch/x86/kvm/Kconfig | 6 +-
arch/x86/kvm/Makefile | 4 +-
arch/x86/kvm/cpuid.c | 9 +-
arch/x86/kvm/emulate.c | 34 +-
arch/x86/kvm/fpu.h | 4 -
arch/x86/kvm/hyperv.c | 5 +-
arch/x86/kvm/i8254.c | 4 -
arch/x86/kvm/kvm_cache_regs.h | 2 -
arch/x86/kvm/kvm_emulate.h | 8 -
arch/x86/kvm/lapic.c | 4 -
arch/x86/kvm/mmu.h | 4 -
arch/x86/kvm/mmu/mmu.c | 134 -----
arch/x86/kvm/mmu/mmu_internal.h | 9 -
arch/x86/kvm/mmu/paging_tmpl.h | 9 -
arch/x86/kvm/mmu/spte.h | 5 -
arch/x86/kvm/mmu/tdp_mmu.h | 4 -
arch/x86/kvm/smm.c | 19 -
arch/x86/kvm/svm/sev.c | 2 -
arch/x86/kvm/svm/svm.c | 23 +-
arch/x86/kvm/svm/vmenter.S | 20 -
arch/x86/kvm/trace.h | 4 -
arch/x86/kvm/vmx/main.c | 2 -
arch/x86/kvm/vmx/nested.c | 24 +-
arch/x86/kvm/vmx/vmcs.h | 2 -
arch/x86/kvm/vmx/vmenter.S | 25 +-
arch/x86/kvm/vmx/vmx.c | 117 +----
arch/x86/kvm/vmx/vmx.h | 23 +-
arch/x86/kvm/vmx/vmx_ops.h | 7 -
arch/x86/kvm/vmx/x86_ops.h | 2 -
arch/x86/kvm/x86.c | 74 +--
arch/x86/kvm/x86.h | 4 -
arch/x86/kvm/xen.c | 61 +--
77 files changed, 63 insertions(+), 3356 deletions(-)
delete mode 100644 arch/powerpc/include/asm/kvm_book3s_32.h
delete mode 100644 arch/powerpc/kvm/book3s_32_mmu_host.c
delete mode 100644 arch/powerpc/kvm/booke_interrupts.S
delete mode 100644 arch/powerpc/kvm/e500.c
--
2.39.5
