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 X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B9A35ECDE3D for ; Sat, 20 Oct 2018 22:24:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8024921746 for ; Sat, 20 Oct 2018 22:24:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.de header.i=@amazon.de header.b="V8oENlOY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8024921746 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=amazon.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727363AbeJUGe6 (ORCPT ); Sun, 21 Oct 2018 02:34:58 -0400 Received: from smtp-fw-9102.amazon.com ([207.171.184.29]:57222 "EHLO smtp-fw-9102.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727182AbeJUGe5 (ORCPT ); Sun, 21 Oct 2018 02:34:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.de; i=@amazon.de; q=dns/txt; s=amazon201209; t=1540074179; x=1571610179; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=6OXx7EPvg1aDnHzwU85Qr5Pxs3whhXMC6JTT0MhOnR4=; b=V8oENlOYIFRTpT93B3tZ9pZ4IrSur5+psm6v5dL5TFnpFUSyJAoT8eV1 d/GoRJewFzwk+u/QwQMMaqwCGxaKIm3WUegX5W5XrReQoRKPU8IpIjA2i z1qo1n3IOpC21c/y5CmRod8FnIUTaU3tL3P7qxzY+PRyxhUhQLuOBgYQ7 Y=; X-IronPort-AV: E=Sophos;i="5.54,405,1534809600"; d="scan'208";a="637420950" Received: from sea3-co-svc-lb6-vlan3.sea.amazon.com (HELO email-inbound-relay-1e-62350142.us-east-1.amazon.com) ([10.47.22.38]) by smtp-border-fw-out-9102.sea19.amazon.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 20 Oct 2018 22:22:58 +0000 Received: from u54e1ad5160425a4b64ea.ant.amazon.com (iad7-ws-svc-lb50-vlan3.amazon.com [10.0.93.214]) by email-inbound-relay-1e-62350142.us-east-1.amazon.com (8.14.7/8.14.7) with ESMTP id w9KMMrnk094978 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 20 Oct 2018 22:22:55 GMT Received: from u54e1ad5160425a4b64ea.ant.amazon.com (localhost [127.0.0.1]) by u54e1ad5160425a4b64ea.ant.amazon.com (8.15.2/8.15.2/Debian-3) with ESMTP id w9KMMq6s031641; Sun, 21 Oct 2018 00:22:52 +0200 Received: (from karahmed@localhost) by u54e1ad5160425a4b64ea.ant.amazon.com (8.15.2/8.15.2/Submit) id w9KMMqI6031629; Sun, 21 Oct 2018 00:22:52 +0200 From: KarimAllah Ahmed To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, pbonzini@redhat.com, rkrcmar@redhat.com Cc: KarimAllah Ahmed Subject: [PATCH v3 09/13] KVM/X86: Use kvm_vcpu_map in emulator_cmpxchg_emulated Date: Sun, 21 Oct 2018 00:22:21 +0200 Message-Id: <1540074145-31285-10-git-send-email-karahmed@amazon.de> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1540074145-31285-1-git-send-email-karahmed@amazon.de> References: <1540074145-31285-1-git-send-email-karahmed@amazon.de> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use kvm_vcpu_map in emulator_cmpxchg_emulated since using kvm_vcpu_gpa_to_page() and kmap() will only work for guest memory that has a "struct page". Signed-off-by: KarimAllah Ahmed --- v1 -> v2: - Update to match the new API return codes --- arch/x86/kvm/x86.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index ca71773..f083e53 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5280,9 +5280,9 @@ static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, unsigned int bytes, struct x86_exception *exception) { + struct kvm_host_map map; struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); gpa_t gpa; - struct page *page; char *kaddr; bool exchanged; @@ -5299,12 +5299,11 @@ static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) goto emul_write; - page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT); - if (is_error_page(page)) + if (kvm_vcpu_map(vcpu, gpa_to_gfn(gpa), &map)) goto emul_write; - kaddr = kmap_atomic(page); - kaddr += offset_in_page(gpa); + kaddr = map.hva + offset_in_page(gpa); + switch (bytes) { case 1: exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); @@ -5321,8 +5320,8 @@ static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, default: BUG(); } - kunmap_atomic(kaddr); - kvm_release_page_dirty(page); + + kvm_vcpu_unmap(&map); if (!exchanged) return X86EMUL_CMPXCHG_FAILED; -- 2.7.4