From nobody Sun Feb 8 21:28:15 2026 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 C125DC7EE23 for ; Thu, 1 Jun 2023 15:06:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234989AbjFAPGP (ORCPT ); Thu, 1 Jun 2023 11:06:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42726 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234492AbjFAPEv (ORCPT ); Thu, 1 Jun 2023 11:04:51 -0400 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6054519A1; Thu, 1 Jun 2023 08:03:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685631816; x=1717167816; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=9N6ybH8Es2bCCrJEhSwD0nBm9Sy9h0sJf/DV0HQeEMk=; b=mIaJYOAiBux8Q+MLpEDrEBdBuwzNCEZUx+iOtYIC4Jy6ZdBu4C4xnJE7 5H1276cvfPCGDuK0TjK2Y0fSyLBcB8vVbWAc/LZKoeFYJVRXvDNPcCTW5 0wEWRcj3JABmt6wl5NO9tnU5XOmZ7YzkwX+dH5gSlKVDWD/lWEt020rr7 LHcZbcsWNFAbCNTGMak8vkRQOVtsLb9EiS1v+NXWqlPK7FlHogfURutmU 4q/uN7oWpSZvyR8KkD7cnq//I0otQMuDDe7bW3/lERqH3q9YGsB70Dp0N VKGi+WzyCCyhhoVsZzlmtcNCF5RSxBsBoFtL27mFVvk9o1CdYqV6r9c+n w==; X-IronPort-AV: E=McAfee;i="6600,9927,10728"; a="383853345" X-IronPort-AV: E=Sophos;i="6.00,210,1681196400"; d="scan'208";a="383853345" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2023 08:02:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10728"; a="657828163" X-IronPort-AV: E=Sophos;i="6.00,210,1681196400"; d="scan'208";a="657828163" Received: from arthur-vostro-3668.sh.intel.com ([10.238.200.123]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2023 08:02:38 -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, Binbin Wu , Zeng Guang Subject: [PATCH v1 1/6] KVM: x86: Consolidate flags for __linearize() Date: Thu, 1 Jun 2023 22:23:04 +0800 Message-Id: <20230601142309.6307-2-guang.zeng@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230601142309.6307-1-guang.zeng@intel.com> References: <20230601142309.6307-1-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" From: Binbin Wu Define a 32-bit parameter and consolidate the two bools into it. __linearize() has two bool parameters write and fetch. And new flag will be needed to support new feature (e.g. LAM needs a flag to skip address untag under some conditions). No functional change intended. Signed-off-by: Binbin Wu Signed-off-by: Zeng Guang --- arch/x86/kvm/emulate.c | 19 +++++++++++++------ arch/x86/kvm/kvm_emulate.h | 4 ++++ 2 files changed, 17 insertions(+), 6 deletions(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 936a397a08cd..9508836e8a35 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -687,8 +687,8 @@ static unsigned insn_alignment(struct x86_emulate_ctxt = *ctxt, unsigned size) static __always_inline int __linearize(struct x86_emulate_ctxt *ctxt, struct segmented_address addr, unsigned *max_size, unsigned size, - bool write, bool fetch, - enum x86emul_mode mode, ulong *linear) + u32 flags, enum x86emul_mode mode, + ulong *linear) { struct desc_struct desc; bool usable; @@ -696,6 +696,8 @@ static __always_inline int __linearize(struct x86_emula= te_ctxt *ctxt, u32 lim; u16 sel; u8 va_bits; + bool fetch =3D !!(flags & X86EMUL_F_FETCH); + bool write =3D !!(flags & X86EMUL_F_WRITE); =20 la =3D seg_base(ctxt, addr.seg) + addr.ea; *max_size =3D 0; @@ -757,7 +759,11 @@ static int linearize(struct x86_emulate_ctxt *ctxt, ulong *linear) { unsigned max_size; - return __linearize(ctxt, addr, &max_size, size, write, false, + u32 flags =3D 0; + + if (write) + flags |=3D X86EMUL_F_WRITE; + return __linearize(ctxt, addr, &max_size, size, flags, ctxt->mode, linear); } =20 @@ -768,10 +774,11 @@ static inline int assign_eip(struct x86_emulate_ctxt = *ctxt, ulong dst) unsigned max_size; struct segmented_address addr =3D { .seg =3D VCPU_SREG_CS, .ea =3D dst }; + u32 flags =3D X86EMUL_F_FETCH; =20 if (ctxt->op_bytes !=3D sizeof(unsigned long)) addr.ea =3D dst & ((1UL << (ctxt->op_bytes << 3)) - 1); - rc =3D __linearize(ctxt, addr, &max_size, 1, false, true, ctxt->mode, &li= near); + rc =3D __linearize(ctxt, addr, &max_size, 1, flags, ctxt->mode, &linear); if (rc =3D=3D X86EMUL_CONTINUE) ctxt->_eip =3D addr.ea; return rc; @@ -896,6 +903,7 @@ static int __do_insn_fetch_bytes(struct x86_emulate_ctx= t *ctxt, int op_size) int cur_size =3D ctxt->fetch.end - ctxt->fetch.data; struct segmented_address addr =3D { .seg =3D VCPU_SREG_CS, .ea =3D ctxt->eip + cur_size }; + u32 flags =3D X86EMUL_F_FETCH; =20 /* * We do not know exactly how many bytes will be needed, and @@ -907,8 +915,7 @@ static int __do_insn_fetch_bytes(struct x86_emulate_ctx= t *ctxt, int op_size) * boundary check itself. Instead, we use max_size to check * against op_size. */ - rc =3D __linearize(ctxt, addr, &max_size, 0, false, true, ctxt->mode, - &linear); + rc =3D __linearize(ctxt, addr, &max_size, 0, flags, ctxt->mode, &linear); if (unlikely(rc !=3D X86EMUL_CONTINUE)) return rc; =20 diff --git a/arch/x86/kvm/kvm_emulate.h b/arch/x86/kvm/kvm_emulate.h index ab65f3a47dfd..5b9ec610b2cb 100644 --- a/arch/x86/kvm/kvm_emulate.h +++ b/arch/x86/kvm/kvm_emulate.h @@ -88,6 +88,10 @@ struct x86_instruction_info { #define X86EMUL_IO_NEEDED 5 /* IO is needed to complete emulation */ #define X86EMUL_INTERCEPTED 6 /* Intercepted by nested VMCB/VMCS */ =20 +/* x86-specific emulation flags */ +#define X86EMUL_F_FETCH BIT(0) +#define X86EMUL_F_WRITE BIT(1) + struct x86_emulate_ops { void (*vm_bugged)(struct x86_emulate_ctxt *ctxt); /* --=20 2.27.0