From nobody Thu Dec 18 05:17:46 2025 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 82D02C77B73 for ; Thu, 20 Apr 2023 14:16:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232050AbjDTOQc (ORCPT ); Thu, 20 Apr 2023 10:16:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231926AbjDTOQS (ORCPT ); Thu, 20 Apr 2023 10:16:18 -0400 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C355540DB; Thu, 20 Apr 2023 07:16:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1682000177; x=1713536177; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=DAVFBOgJwmbdVgPRUhLaouaTcJcJ1MnxKOkOedpXi1U=; b=hvxPxf42OVYIY39GpTsSGfjw3rEsjqU8OSQGrVMBo+TS7Zr5FBUgnRSH x9/1/I+C81J//Z8BwPYFAMiNfk7lmvCspzcL9GHPdqqvzLaLklDtJJJDb IlPOeKRc4cb/knbAOYa8Pl23xS/KeAHt2qmNqD/ENAhkb2n8YvTUtFrsf +de6EuiBVkd4ItdWjNYjrBVpooQM+tX3rVooeiq/sL0Udriz73HbfqMgp v32cRjiNYQDxs509N7Tqe3Xa2oof77Xx8KqBxrQlSMRej9lqKk2XmO5RT k64Nxa+Hni1IT+W5Y4CSHfWeUDqNilUBNVD0fU7tBcW90mhaUxRmeQw0E Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10686"; a="343217826" X-IronPort-AV: E=Sophos;i="5.99,212,1677571200"; d="scan'208";a="343217826" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Apr 2023 07:16:10 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10686"; a="816028858" X-IronPort-AV: E=Sophos;i="5.99,212,1677571200"; d="scan'208";a="816028858" Received: from arthur-vostro-3668.sh.intel.com ([10.238.200.53]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Apr 2023 07:16:06 -0700 From: Zeng Guang To: Paolo Bonzini , Sean Christopherson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , H Peter Anvin , kvm@vger.kernel.org Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Gao Chao , Zeng Guang Subject: [PATCH 3/6] KVM: x86: Add emulator helper for LASS violation check Date: Thu, 20 Apr 2023 21:37:21 +0800 Message-Id: <20230420133724.11398-4-guang.zeng@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230420133724.11398-1-guang.zeng@intel.com> References: <20230420133724.11398-1-guang.zeng@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" When LASS is enabled, KVM need apply LASS violation check to instruction emulations. Add helper for the usage of x86 emulator to perform LASS protection. Signed-off-by: Zeng Guang --- arch/x86/kvm/kvm_emulate.h | 1 + arch/x86/kvm/x86.c | 9 +++++++++ 2 files changed, 10 insertions(+) diff --git a/arch/x86/kvm/kvm_emulate.h b/arch/x86/kvm/kvm_emulate.h index 2d9662be8333..1c55247d52d7 100644 --- a/arch/x86/kvm/kvm_emulate.h +++ b/arch/x86/kvm/kvm_emulate.h @@ -224,6 +224,7 @@ struct x86_emulate_ops { int (*leave_smm)(struct x86_emulate_ctxt *ctxt); void (*triple_fault)(struct x86_emulate_ctxt *ctxt); int (*set_xcr)(struct x86_emulate_ctxt *ctxt, u32 index, u64 xcr); + bool (*check_lass)(struct x86_emulate_ctxt *ctxt, u64 access, u64 la, u64= flags); }; =20 /* Type, address-of, and value of an instruction's operand. */ diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 87feb1249ad6..704c5e4b9e76 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -8193,6 +8193,14 @@ static void emulator_vm_bugged(struct x86_emulate_ct= xt *ctxt) kvm_vm_bugged(kvm); } =20 +static bool emulator_check_lass(struct x86_emulate_ctxt *ctxt, + u64 access, u64 la, u64 flags) +{ + struct kvm_vcpu *vcpu =3D emul_to_vcpu(ctxt); + + return static_call(kvm_x86_check_lass)(vcpu, access, la, flags); +} + static const struct x86_emulate_ops emulate_ops =3D { .vm_bugged =3D emulator_vm_bugged, .read_gpr =3D emulator_read_gpr, @@ -8237,6 +8245,7 @@ static const struct x86_emulate_ops emulate_ops =3D { .leave_smm =3D emulator_leave_smm, .triple_fault =3D emulator_triple_fault, .set_xcr =3D emulator_set_xcr, + .check_lass =3D emulator_check_lass, }; =20 static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) --=20 2.27.0