From patchwork Fri Nov 19 13:47:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chao Peng X-Patchwork-Id: 12628929 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 26CE7C433F5 for ; Fri, 19 Nov 2021 13:55:03 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C886761547 for ; Fri, 19 Nov 2021 13:55:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org C886761547 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:60750 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mo4M1-0001wU-TV for qemu-devel@archiver.kernel.org; Fri, 19 Nov 2021 08:55:01 -0500 Received: from eggs.gnu.org ([209.51.188.92]:60376) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mo4G8-0005Qa-B5 for qemu-devel@nongnu.org; Fri, 19 Nov 2021 08:48:56 -0500 Received: from mga01.intel.com ([192.55.52.88]:38445) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mo4G5-0000FJ-WB for qemu-devel@nongnu.org; Fri, 19 Nov 2021 08:48:56 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10172"; a="258207297" X-IronPort-AV: E=Sophos;i="5.87,247,1631602800"; d="scan'208";a="258207297" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Nov 2021 05:48:51 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,247,1631602800"; d="scan'208";a="507904803" Received: from chaop.bj.intel.com ([10.240.192.101]) by orsmga008.jf.intel.com with ESMTP; 19 Nov 2021 05:48:43 -0800 From: Chao Peng To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, qemu-devel@nongnu.org Subject: [RFC v2 PATCH 02/13] KVM: Add KVM_EXIT_MEMORY_ERROR exit Date: Fri, 19 Nov 2021 21:47:28 +0800 Message-Id: <20211119134739.20218-3-chao.p.peng@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211119134739.20218-1-chao.p.peng@linux.intel.com> References: <20211119134739.20218-1-chao.p.peng@linux.intel.com> Received-SPF: none client-ip=192.55.52.88; envelope-from=chao.p.peng@linux.intel.com; helo=mga01.intel.com X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Wanpeng Li , jun.nakajima@intel.com, david@redhat.com, "J . Bruce Fields" , dave.hansen@intel.com, "H . Peter Anvin" , Chao Peng , ak@linux.intel.com, Jonathan Corbet , Joerg Roedel , x86@kernel.org, Hugh Dickins , Ingo Molnar , Borislav Petkov , luto@kernel.org, Thomas Gleixner , Vitaly Kuznetsov , Jim Mattson , Sean Christopherson , susie.li@intel.com, Jeff Layton , john.ji@intel.com, Yu Zhang , Paolo Bonzini , Andrew Morton , "Kirill A . Shutemov" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This new exit allows userspace to handle memory related error. It will be used for shared memory <-->private memory conversion. Signed-off-by: Yu Zhang Signed-off-by: Chao Peng --- include/uapi/linux/kvm.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 7c93d61cb19e..7e3a8935534b 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -285,6 +285,18 @@ struct kvm_tdx_exit { } u; }; +struct kvm_memory_exit { +#define KVM_EXIT_MEM_MAP_SHARED 1 +#define KVM_EXIT_MEM_MAP_PRIVATE 2 + __u32 type; + union { + struct { + __u64 gpa; + __u64 size; + } map; + } u; +}; + #define KVM_S390_GET_SKEYS_NONE 1 #define KVM_S390_SKEYS_MAX 1048576 @@ -324,6 +336,7 @@ struct kvm_tdx_exit { #define KVM_EXIT_X86_BUS_LOCK 33 #define KVM_EXIT_XEN 34 #define KVM_EXIT_RISCV_SBI 35 +#define KVM_EXIT_MEMORY_ERROR 36 #define KVM_EXIT_TDX 50 /* dump number to avoid conflict. */ /* For KVM_EXIT_INTERNAL_ERROR */ @@ -542,6 +555,8 @@ struct kvm_run { unsigned long args[6]; unsigned long ret[2]; } riscv_sbi; + /* KVM_EXIT_MEMORY_ERROR */ + struct kvm_memory_exit mem; /* KVM_EXIT_TDX_VMCALL */ struct kvm_tdx_exit tdx; /* Fix the size of the union. */