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Date: Fri, 8 May 2015 10:18:00 +0900 From: AKASHI Takahiro <takahiro.akashi@...aro.org> To: catalin.marinas@....com, will.deacon@....com, marc.zyngier@....com, mark.rutland@....com Cc: christoffer.dall@...aro.org, geoff@...radead.org, broonie@...nel.org, david.griego@...aro.org, freddy77@...il.com, kexec@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org, linaro-kernel@...ts.linaro.org, linux-kernel@...r.kernel.org, AKASHI Takahiro <takahiro.akashi@...aro.org> Subject: [v4 0/4] arm64: kvm: reset hyp context for kexec This patch set addresses KVM issue described in Geoff's kexec patch set[1]. See "Changes" below. Initially, I used reboot notifier hook to shut down cpu cores, but in this version, kvm cpu hotplug is implemented after Mark's comment. I confirmed that it works with kexec under the following scenarios: - boot 1st kernel - run a guest OS - (stop a guest OS) - reboot 2nd kernel by kexec - run a guest OS test target: MediaTek MT8173-EVB version: kernel v4.0-rc1 + Geoff's kexec v8 + Arn's patch[2] But I didn't test other complicated scenarios with cpu hotplug. On arm, Frediano[3] is no longer working on this issue as he left his company. patch#4 is just a stub for arm. Changes from v3: * modified to use kvm cpu hotplug framework directly instead of reboot notifier hook Changes from v2: * modified kvm_virt_to_trampoline() macro to fix a page-alignment issue[4] Changes from v1: * modified kvm_cpu_reset() implementation: - define a macro to translate va to addr in trampoline - use __hyp_default_vectors instead of kvm_get_hyp_stub_vectors() - shuffle the arguments in __cpu_reset_hyp_mode() - optimize TLB flush operations * changed a patch#2's name * added a patch#5 to add stub code for arm [1] http://lists.infradead.org/pipermail/kexec/2015-April/335533.html [2] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-March/334002.html [3] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-February/322231.html [4] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-March/334910.html AKASHI Takahiro (4): arm64: kvm: add a cpu tear-down function arm64: kvm: add kvm cpu hotplug arm64: kvm: remove !KEXEC dependency arm: kvm: add stub implementation for kvm_cpu_reset() arch/arm/include/asm/kvm_asm.h | 1 + arch/arm/include/asm/kvm_host.h | 13 ++++++++++- arch/arm/include/asm/kvm_mmu.h | 5 +++++ arch/arm/kvm/arm.c | 44 ++++++++++++++++++++++++++++--------- arch/arm/kvm/init.S | 6 +++++ arch/arm/kvm/mmu.c | 5 +++++ arch/arm64/include/asm/kvm_asm.h | 1 + arch/arm64/include/asm/kvm_host.h | 12 +++++++++- arch/arm64/include/asm/kvm_mmu.h | 7 ++++++ arch/arm64/include/asm/virt.h | 11 ++++++++++ arch/arm64/kvm/Kconfig | 1 - arch/arm64/kvm/hyp-init.S | 32 +++++++++++++++++++++++++++ arch/arm64/kvm/hyp.S | 16 +++++++++++--- 13 files changed, 138 insertions(+), 16 deletions(-) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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