| Message ID | 20241221214223.3046298-1-arnd@kernel.org (mailing list archive) |
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Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9ED0D149C50; Sat, 21 Dec 2024 21:48:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734817739; cv=none; b=PDsy0nxWDlMGsD33t8d8lgdXAI1dPnf/spIL+La79XnjxZ+LNdRlGUZEMS2jK3x62HiCrVlVuZpFLTREqYfbRtrqqF92ObDGlVzM2A07Gd3ShOKEwjYFJvFFdt2noYpPSjVHNHRAReFqkC5SEhR5Irvr1+LkfW+e9RuDAsc+owo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734817739; c=relaxed/simple; bh=liSnJKHt137nDINsiNS8bBle3Cakfhe3aWwZ4NxRgcA=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=KVCaq2fDMPm8IZ/djQ6UV18tjOZvy8WDm4SiGneHkGpUokHvWCIg7qASEdDjB1QxSrDGjIKEqwu+0v+S0cZlJFjjBiOSntV8+CFrz5YmPYJYZwYo0M+EIno4irANbQGHOWFSu9VF5kJmPVcJBrol9LbT6Cu/dCsNtE/sIgxqL9c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=f9y2FsCZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="f9y2FsCZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DDA08C4CECE; Sat, 21 Dec 2024 21:48:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734817739; bh=liSnJKHt137nDINsiNS8bBle3Cakfhe3aWwZ4NxRgcA=; h=From:To:Cc:Subject:Date:From; b=f9y2FsCZXSDafB5TbgOF65PJ7LnEv+LO6b/B2wnLgowdZ6Rzly5Ph9Gnu5IvLiwLr Cytt5GW/+3ZIlLFHNp2Ne6ZsmfOYsIPAX5hMhGJbIIK97SehoSLQaoiM/R2ZCUQ3cm XELo0Bt0XTaJR0dDn/VelQXxX4uf2TkbBZBGLg/qbnYRNSXsIgW9KHdTX6KpOeIIgY 2AnjB8pwrt0wr97UXs0ymdOIft+CgjBpbx5hfXbdjsgzA3Hm7yufnoAB1ROPWOwMZh j2a+QU4yvoLiaM3vOHQ6x8sMcVdQM00CK2/aDqbJEs+QNpcTNHoLfoWMr9gI/Vdjqx PkqvYDjziUKwQ== From: Arnd Bergmann <arnd@kernel.org> To: kvm@vger.kernel.org Cc: Arnd Bergmann <arnd@arndb.de>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>, Huacai Chen <chenhuacai@kernel.org>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com>, Christophe Leroy <christophe.leroy@csgroup.eu>, Naveen N Rao <naveen@kernel.org>, Madhavan Srinivasan <maddy@linux.ibm.com>, Alexander Graf <graf@amazon.com>, Crystal Wood <crwood@redhat.com>, Anup Patel <anup@brainfault.org>, Atish Patra <atishp@atishpatra.org>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Sean Christopherson <seanjc@google.com>, Paolo Bonzini <pbonzini@redhat.com>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>, Vitaly Kuznetsov <vkuznets@redhat.com>, David Woodhouse <dwmw2@infradead.org>, Paul Durrant <paul@xen.org>, Marc Zyngier <maz@kernel.org>, "A. Wilcox" <AWilcox@Wilcox-Tech.com>, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org Subject: [PATCH v2 0/5] KVM: drop 32-bit host support on all architectures Date: Sat, 21 Dec 2024 22:42:18 +0100 Message-Id: <20241221214223.3046298-1-arnd@kernel.org> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: linux-mips@vger.kernel.org List-Id: <linux-mips.vger.kernel.org> List-Subscribe: <mailto:linux-mips+subscribe@vger.kernel.org> List-Unsubscribe: <mailto:linux-mips+unsubscribe@vger.kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit |
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KVM: drop 32-bit host support on all architectures
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From: Arnd Bergmann <arnd@arndb.de> I've updated my RFC patches based on the feedback, changing mainly the powerpc code. 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. I hope this can get merged through the KVM tree as a whole series. Arnd --- v2 changes: - rebase to kvm #next branch - improve changelog text for x86 - many updates for powerpc, thanks to Christophe Leroy for suggestions Link: https://lore.kernel.org/lkml/Z1B1phcpbiYWLgCD@google.com/ Link: https://lore.kernel.org/lkml/20241212125516.467123-1-arnd@kernel.org/ Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Jiaxun Yang <jiaxun.yang@flygoat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Naveen N Rao <naveen@kernel.org> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Alexander Graf <graf@amazon.com> Cc: Crystal Wood <crwood@redhat.com> Cc: Anup Patel <anup@brainfault.org> Cc: Atish Patra <atishp@atishpatra.org> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Sean Christopherson <seanjc@google.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: x86@kernel.org Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Paul Durrant <paul@xen.org> Cc: Marc Zyngier <maz@kernel.org> Cc: "A. Wilcox" <AWilcox@Wilcox-Tech.com> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@vger.kernel.org Cc: kvm@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: kvm-riscv@lists.infradead.org Cc: linux-riscv@lists.infradead.org Arnd Bergmann (5): mips: kvm: drop support for 32-bit hosts riscv: kvm: drop 32-bit host support powerpc: kvm: drop 32-bit booke powerpc: kvm: drop 32-bit book3s 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 | 17 - 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/include/asm/kvm_host.h | 2 +- arch/powerpc/include/asm/kvm_ppc.h | 2 +- arch/powerpc/include/asm/processor.h | 3 - arch/powerpc/kernel/asm-offsets.c | 21 +- arch/powerpc/kernel/head_32.h | 10 - arch/powerpc/kernel/head_85xx.S | 14 - arch/powerpc/kernel/head_book3s_32.S | 5 - arch/powerpc/kernel/head_booke.h | 39 -- 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 | 268 ---------- 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 | 102 ---- 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 | 2 +- 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 +-- 85 files changed, 66 insertions(+), 3536 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