From patchwork Fri Jan 18 21:20:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 10771579 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A180A17FB for ; Fri, 18 Jan 2019 21:22:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 93463305F7 for ; Fri, 18 Jan 2019 21:22:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8EF6730578; Fri, 18 Jan 2019 21:22:51 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3E3BB30617 for ; Fri, 18 Jan 2019 21:22:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729781AbfARVWu (ORCPT ); Fri, 18 Jan 2019 16:22:50 -0500 Received: from mga05.intel.com ([192.55.52.43]:43594 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729666AbfARVWG (ORCPT ); Fri, 18 Jan 2019 16:22:06 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 18 Jan 2019 13:22:05 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,492,1539673200"; d="scan'208";a="139511463" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.14]) by fmsmga001.fm.intel.com with ESMTP; 18 Jan 2019 13:22:05 -0800 From: Sean Christopherson To: Paolo Bonzini , =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= Cc: kvm@vger.kernel.org, Andi Kleen , Josh Poimboeuf Subject: [PATCH 07/29] KVM: nVMX: Remove a rogue "rax" clobber from nested_vmx_check_vmentry_hw() Date: Fri, 18 Jan 2019 13:20:15 -0800 Message-Id: <20190118212037.24412-8-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190118212037.24412-1-sean.j.christopherson@intel.com> References: <20190118212037.24412-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP RAX is not touched by nested_vmx_check_vmentry_hw(), directly or indirectly via e.g. VMX_UPDATE_VMCS_HOST_RSP, vmx_vmenter or fixup. Remove it from the clobber list. Fixes: 52017608da33 ("KVM: nVMX: add option to perform early consistency checks via H/W") Signed-off-by: Sean Christopherson --- arch/x86/kvm/vmx/nested.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 69920c2fa5db..489f085c406b 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -2772,7 +2772,7 @@ static int nested_vmx_check_vmentry_hw(struct kvm_vcpu *vcpu) [fail]"i"(offsetof(struct vcpu_vmx, fail)), [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)), [wordsize]"i"(sizeof(ulong)) - : "rax", "cc", "memory" + : "cc", "memory" ); preempt_enable();