From patchwork Sat Dec 21 21:42:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 13917938 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EFB80E7718D for ; Sat, 21 Dec 2024 21:49:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=GjDU0PUQiHgl4SDiOAiDUfy4cQq7IOBy0448hjQ6aKE=; b=maQH7o1LTNd4p2 JJEjJBO8WLyGXeB6shwa1dwUdCVDrFBG3LPn0D8hrFfkFMrhCKNNQouGgpNJl+3vxXrRg/1FxH/HK 87lBlhtCiEm7sOmag9L2xNLCQU2ZvF5DgbY3ONL9virXTFKI/3q99AlIW00WRq9wpFoT0vKP1jAYL +r0EYkayPapLsP1fVQgLRQ3tqyhnRJ4cXtslTl9JDwe4sCKFTsnAwAFzhpvi79dTW1El3Cdd3IIKg c6V1W2oPHrvDVIWzYrEYWPcknx117mZtMGkCoO99fCQNOypIVD8z7Hy1N5Jzgu8tJNYLcs/slw3BO DYr/e1U/teNA2jugWWmA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tP7LP-00000007SV6-0B9p; Sat, 21 Dec 2024 21:49:07 +0000 Received: from nyc.source.kernel.org ([2604:1380:45d1:ec00::3]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tP7LL-00000007STc-25QD; Sat, 21 Dec 2024 21:49:04 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 147E5A403F5; Sat, 21 Dec 2024 21:47:09 +0000 (UTC) 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 To: kvm@vger.kernel.org Cc: Arnd Bergmann , Thomas Bogendoerfer , Huacai Chen , Jiaxun Yang , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Naveen N Rao , Madhavan Srinivasan , Alexander Graf , Crystal Wood , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Sean Christopherson , Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Vitaly Kuznetsov , David Woodhouse , Paul Durrant , Marc Zyngier , "A. Wilcox" , 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 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241221_134903_671884_97BD39F2 X-CRM114-Status: GOOD ( 18.24 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Arnd Bergmann 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 Cc: Huacai Chen Cc: Jiaxun Yang Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Christophe Leroy Cc: Naveen N Rao Cc: Madhavan Srinivasan Cc: Alexander Graf Cc: Crystal Wood Cc: Anup Patel Cc: Atish Patra Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: Sean Christopherson Cc: Paolo Bonzini Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: x86@kernel.org Cc: "H. Peter Anvin" Cc: Vitaly Kuznetsov Cc: David Woodhouse Cc: Paul Durrant Cc: Marc Zyngier Cc: "A. Wilcox" 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