From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: Anders Berg <anders.berg@lsi.com>,
Russell King <linux@arm.linux.org.uk>,
Arnd Bergmann <arnd@arndb.de>,
Paolo Bonzini <pbonzini@redhat.com>,
Will Deacon <will@kernel.org>
Subject: [RFC PATCH 0/5] Removing support for 32bit KVM/arm host
Date: Mon, 10 Feb 2020 14:13:19 +0000 [thread overview]
Message-ID: <20200210141324.21090-1-maz@kernel.org> (raw)
KVM/arm was merged just over 7 years ago, and has lived a very quiet
life so far. It mostly works if you're prepared to deal with its
limitations, it has been a good prototype for the arm64 version,
but it suffers a few problems:
- It is incomplete (no debug support, no PMU)
- It hasn't followed any of the architectural evolutions
- It has zero users (I don't count myself here)
- It is more and more getting in the way of new arm64 developments
So here it is: unless someone screams and shows that they rely on
KVM/arm to be maintained upsteam, I'll remove 32bit host support
form the tree. One of the reasons that makes me confident nobody is
using it is that I never receive *any* bug report. Yes, it is perfect.
But if you depend on KVM/arm being available in mainline, please shout.
To reiterate: 32bit guest support for arm64 stays, of course. Only
32bit host goes. Once this is merged, I plan to move virt/kvm/arm to
arm64, and cleanup all the now unnecessary abstractions.
The patches have been generated with the -D option to avoid spamming
everyone with huge diffs, and there is a kvm-arm/goodbye branch in
my kernel.org repository.
Marc Zyngier (5):
arm: Unplug KVM from the build system
arm: Remove KVM from config files
arm: Remove 32bit KVM host support
arm: Remove HYP/Stage-2 page-table support
arm: Remove GICv3 vgic compatibility macros
Documentation/virt/kvm/arm/hyp-abi.txt | 5 +
arch/arm/Kconfig | 2 -
arch/arm/Makefile | 1 -
arch/arm/configs/axm55xx_defconfig | 2 -
arch/arm/include/asm/arch_gicv3.h | 114 --
arch/arm/include/asm/kvm_arm.h | 239 ----
arch/arm/include/asm/kvm_asm.h | 77 --
arch/arm/include/asm/kvm_coproc.h | 36 -
arch/arm/include/asm/kvm_emulate.h | 372 ------
arch/arm/include/asm/kvm_host.h | 459 --------
arch/arm/include/asm/kvm_hyp.h | 127 ---
arch/arm/include/asm/kvm_mmu.h | 435 -------
arch/arm/include/asm/kvm_ras.h | 14 -
arch/arm/include/asm/pgtable-3level.h | 20 -
arch/arm/include/asm/pgtable.h | 9 -
arch/arm/include/asm/sections.h | 6 +-
arch/arm/include/asm/stage2_pgtable.h | 75 --
arch/arm/include/asm/virt.h | 12 -
arch/arm/include/uapi/asm/kvm.h | 314 -----
arch/arm/kernel/asm-offsets.c | 11 -
arch/arm/kernel/vmlinux-xip.lds.S | 8 -
arch/arm/kernel/vmlinux.lds.S | 8 -
arch/arm/kernel/vmlinux.lds.h | 10 -
arch/arm/kvm/Kconfig | 59 -
arch/arm/kvm/Makefile | 43 -
arch/arm/kvm/coproc.c | 1455 ------------------------
arch/arm/kvm/coproc.h | 130 ---
arch/arm/kvm/coproc_a15.c | 39 -
arch/arm/kvm/coproc_a7.c | 42 -
arch/arm/kvm/emulate.c | 166 ---
arch/arm/kvm/guest.c | 387 -------
arch/arm/kvm/handle_exit.c | 175 ---
arch/arm/kvm/hyp/Makefile | 34 -
arch/arm/kvm/hyp/banked-sr.c | 70 --
arch/arm/kvm/hyp/cp15-sr.c | 72 --
arch/arm/kvm/hyp/entry.S | 121 --
arch/arm/kvm/hyp/hyp-entry.S | 295 -----
arch/arm/kvm/hyp/s2-setup.c | 22 -
arch/arm/kvm/hyp/switch.c | 242 ----
arch/arm/kvm/hyp/tlb.c | 68 --
arch/arm/kvm/hyp/vfp.S | 57 -
arch/arm/kvm/init.S | 157 ---
arch/arm/kvm/interrupts.S | 36 -
arch/arm/kvm/irq.h | 16 -
arch/arm/kvm/reset.c | 86 --
arch/arm/kvm/trace.h | 86 --
arch/arm/kvm/vgic-v3-coproc.c | 27 -
arch/arm/mach-exynos/Kconfig | 2 +-
arch/arm/mm/mmu.c | 26 -
49 files changed, 7 insertions(+), 6262 deletions(-)
delete mode 100644 arch/arm/include/asm/kvm_arm.h
delete mode 100644 arch/arm/include/asm/kvm_asm.h
delete mode 100644 arch/arm/include/asm/kvm_coproc.h
delete mode 100644 arch/arm/include/asm/kvm_emulate.h
delete mode 100644 arch/arm/include/asm/kvm_host.h
delete mode 100644 arch/arm/include/asm/kvm_hyp.h
delete mode 100644 arch/arm/include/asm/kvm_mmu.h
delete mode 100644 arch/arm/include/asm/kvm_ras.h
delete mode 100644 arch/arm/include/asm/stage2_pgtable.h
delete mode 100644 arch/arm/include/uapi/asm/kvm.h
delete mode 100644 arch/arm/kvm/Kconfig
delete mode 100644 arch/arm/kvm/Makefile
delete mode 100644 arch/arm/kvm/coproc.c
delete mode 100644 arch/arm/kvm/coproc.h
delete mode 100644 arch/arm/kvm/coproc_a15.c
delete mode 100644 arch/arm/kvm/coproc_a7.c
delete mode 100644 arch/arm/kvm/emulate.c
delete mode 100644 arch/arm/kvm/guest.c
delete mode 100644 arch/arm/kvm/handle_exit.c
delete mode 100644 arch/arm/kvm/hyp/Makefile
delete mode 100644 arch/arm/kvm/hyp/banked-sr.c
delete mode 100644 arch/arm/kvm/hyp/cp15-sr.c
delete mode 100644 arch/arm/kvm/hyp/entry.S
delete mode 100644 arch/arm/kvm/hyp/hyp-entry.S
delete mode 100644 arch/arm/kvm/hyp/s2-setup.c
delete mode 100644 arch/arm/kvm/hyp/switch.c
delete mode 100644 arch/arm/kvm/hyp/tlb.c
delete mode 100644 arch/arm/kvm/hyp/vfp.S
delete mode 100644 arch/arm/kvm/init.S
delete mode 100644 arch/arm/kvm/interrupts.S
delete mode 100644 arch/arm/kvm/irq.h
delete mode 100644 arch/arm/kvm/reset.c
delete mode 100644 arch/arm/kvm/trace.h
delete mode 100644 arch/arm/kvm/vgic-v3-coproc.c
--
2.20.1
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next reply other threads:[~2020-02-10 14:13 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20200210141344eucas1p25a6da0b0251931ef3659397a6f34c0c3@eucas1p2.samsung.com>
2020-02-10 14:13 ` Marc Zyngier [this message]
2020-02-10 14:13 ` [RFC PATCH 1/5] arm: Unplug KVM from the build system Marc Zyngier
2020-02-10 14:13 ` [RFC PATCH 2/5] arm: Remove KVM from config files Marc Zyngier
2020-02-10 14:13 ` [RFC PATCH 3/5] arm: Remove 32bit KVM host support Marc Zyngier
2020-02-10 14:13 ` [RFC PATCH 4/5] arm: Remove HYP/Stage-2 page-table support Marc Zyngier
2020-02-10 14:13 ` [RFC PATCH 5/5] arm: Remove GICv3 vgic compatibility macros Marc Zyngier
2020-02-10 15:21 ` [RFC PATCH 0/5] Removing support for 32bit KVM/arm host Olof Johansson
2020-02-10 15:54 ` Arnd Bergmann
2020-02-10 15:46 ` Will Deacon
2020-02-10 16:25 ` Russell King - ARM Linux admin
2020-02-10 16:26 ` Russell King - ARM Linux admin
2020-02-11 15:12 ` Vladimir Murzin
2020-02-11 15:23 ` Catalin Marinas
2020-02-17 0:14 ` Linus Walleij
2020-02-19 13:53 ` Stefan Agner
2020-02-20 11:01 ` Marc Zyngier
2020-02-19 14:56 ` Christoffer Dall
2020-02-19 15:09 ` Arnd Bergmann
2020-02-19 15:46 ` Jan Kiszka
2020-02-20 10:29 ` Marc Zyngier
2020-02-20 12:44 ` Marek Szyprowski
2020-02-20 13:15 ` Marc Zyngier
2020-02-20 13:17 ` Paolo Bonzini
2020-02-20 13:32 ` Robin Murphy
2020-02-20 14:01 ` Marc Zyngier
2020-02-20 14:38 ` Robin Murphy
2020-02-22 14:21 ` Takashi Yoshi
2020-02-22 14:40 ` Takashi Yoshi
2020-02-22 21:31 ` Arnd Bergmann
2020-02-25 21:34 ` Takashi Yoshi
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