From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9E7A9ECAAA1 for ; Tue, 30 Aug 2022 12:02:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229998AbiH3MB7 (ORCPT ); Tue, 30 Aug 2022 08:01:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38046 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229561AbiH3MB4 (ORCPT ); Tue, 30 Aug 2022 08:01:56 -0400 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BC5B8E399B; Tue, 30 Aug 2022 05:01:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1661860914; x=1693396914; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=gbCj+SlvH9cYEHWaMs6CxZsjrHuR25HaucDocuWVwrY=; b=TSfdZervg1u9br9iNhdOeOyxzoFZlx0B7PCpzQzSVDrCXc9rWkdCakcq bijidyiO/ABzuoFEwGC2hli2cJPi7QAVhgTCN+ZTuX3ZfEzwQTlmT7Dgc +mkyaLVasR2c2hURC0Z/yxEgu/WFxELSAPDtQB9cCvy9sNtmbOlwRB6ND Uyf6/YZ6TDOvglar7u+UArRDR0E5C6DOgs8/mmI7rNcHSXY4GX0LmHaVy NBIFKLzmWOJC0TfFYnCxEEYt0yNMuTyiAHWq6DRVunYBB2Zqhr+li23G1 PeFUg02ABslV8zKdAE2WGl4/t9vSpvHThs1izMLehH3GHIYzQFZ4cqWwy g==; X-IronPort-AV: E=McAfee;i="6500,9779,10454"; a="356870953" X-IronPort-AV: E=Sophos;i="5.93,274,1654585200"; d="scan'208";a="356870953" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Aug 2022 05:01:54 -0700 X-IronPort-AV: E=Sophos;i="5.93,274,1654585200"; d="scan'208";a="857078224" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Aug 2022 05:01:53 -0700 From: isaku.yamahata@intel.com To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com, Paolo Bonzini , Sean Christopherson , Kai Huang , Chao Gao , Will Deacon Subject: [PATCH v2 00/19] KVM hardware enable/disable reorganize Date: Tue, 30 Aug 2022 05:01:15 -0700 Message-Id: X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Isaku Yamahata This patch series is to implement the suggestion by Sean Christopherson [1] to reorganize enable/disable cpu virtualization feature by replacing the arch-generic current enable/disable logic with PM related hooks. And convert kvm/x86 to use new hooks. - Untable x86 hardware enable logic, snapshot MSRs for user return notifier, enabling cpu virtualization on cpu online and platform resume. and real enabling of CPU virtualization feature - Introduce hooks related to PM. - Convert kvm/x86 code to user those hooks. - Split out hardware enabling/disabling logic into a separate file. Compile it for non-x86 code. Once conversion of other KVM archs is done, this file can be dropped. - Delete cpus_hardware_enabled. 17/18 and 18/18 [1] https://lore.kernel.org/kvm/YvU+6fdkHaqQiKxp@google.com/ Changes from v1: - Add a patch "KVM: Rename and move CPUHP_AP_KVM_STARTING to ONLINE section" to make online/offline callback to run thread context to use mutex instead of spin lock - fixes pointed by Chao Gao Chao Gao (3): KVM: x86: Move check_processor_compatibility from init ops to runtime ops Partially revert "KVM: Pass kvm_init()'s opaque param to additional arch funcs" KVM: Rename and move CPUHP_AP_KVM_STARTING to ONLINE section Isaku Yamahata (16): KVM: x86: Drop kvm_user_return_msr_cpu_online() KVM: x86: Use this_cpu_ptr() instead of per_cpu_ptr(smp_processor_id()) KVM: Drop kvm_count_lock and instead protect kvm_usage_count with kvm_lock KVM: Add arch hooks for PM events with empty stub KVM: x86: Move TSC fixup logic to KVM arch resume callback KVM: Add arch hook when VM is added/deleted KVM: Move out KVM arch PM hooks and hardware enable/disable logic KVM: kvm_arch.c: Remove _nolock post fix KVM: kvm_arch.c: Remove a global variable, hardware_enable_failed KVM: Do processor compatibility check on cpu online and resume KVM: x86: Duplicate arch callbacks related to pm events KVM: Eliminate kvm_arch_post_init_vm() KVM: x86: Delete kvm_arch_hardware_enable/disable() KVM: Add config to not compile kvm_arch.c RFC: KVM: x86: Remove cpus_hardware_enabled and related sanity check RFC: KVM: Remove cpus_hardware_enabled and related sanity check Documentation/virt/kvm/locking.rst | 14 +-- arch/arm64/kvm/arm.c | 2 +- arch/mips/kvm/mips.c | 2 +- arch/powerpc/kvm/powerpc.c | 2 +- arch/riscv/kvm/main.c | 2 +- arch/s390/kvm/kvm-s390.c | 2 +- arch/x86/include/asm/kvm-x86-ops.h | 1 + arch/x86/include/asm/kvm_host.h | 2 +- arch/x86/kvm/Kconfig | 1 + arch/x86/kvm/svm/svm.c | 4 +- arch/x86/kvm/vmx/vmx.c | 14 +-- arch/x86/kvm/x86.c | 192 +++++++++++++++++++++------- include/linux/cpuhotplug.h | 2 +- include/linux/kvm_host.h | 14 ++- virt/kvm/Kconfig | 3 + virt/kvm/Makefile.kvm | 3 + virt/kvm/kvm_arch.c | 126 +++++++++++++++++++ virt/kvm/kvm_main.c | 193 +++++++++-------------------- 18 files changed, 373 insertions(+), 206 deletions(-) create mode 100644 virt/kvm/kvm_arch.c -- 2.25.1