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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 04A67C6379D for ; Tue, 24 Nov 2020 19:08:11 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 7D648206B5 for ; Tue, 24 Nov 2020 19:08:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=xen.org header.i=@xen.org header.b="mAc7Eq71" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7D648206B5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xen.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.36804.68835 (Exim 4.92) (envelope-from ) id 1khdfI-0001IQ-OQ; Tue, 24 Nov 2020 19:07:48 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 36804.68835; Tue, 24 Nov 2020 19:07:48 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khdfI-0001IJ-It; Tue, 24 Nov 2020 19:07:48 +0000 Received: by outflank-mailman (input) for mailman id 36804; Tue, 24 Nov 2020 19:07:47 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khdfH-0001HM-BD for xen-devel@lists.xenproject.org; Tue, 24 Nov 2020 19:07:47 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khdfH-0003sb-1P; Tue, 24 Nov 2020 19:07:47 +0000 Received: from host86-183-162-145.range86-183.btcentralplus.com ([86.183.162.145] helo=u2f063a87eabd5f.home) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1khdfG-0000r4-PC; Tue, 24 Nov 2020 19:07:46 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khdfH-0001HM-BD for xen-devel@lists.xenproject.org; Tue, 24 Nov 2020 19:07:47 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Content-Transfer-Encoding:Content-Type:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From; bh=oFMSo+GJNEgaaZ5yNsIGpJUzjgKARczCMDIFteDVII8=; b=mAc7Eq71ryR1pzCsfSRYwmCYU/ JCGcN2QMNxni/S6dKxkM4Wb19VsYomMJsNIikrDh39l1R+rlb8cywON8+lXHhR3cuw0oIy1MIOyX7 tfgxG9iaVQbEifizl33H8kX2QwR/2hhVV2eiG9REegNhtIMtFAVVKuMzB1Quq5UfzsYA=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khdfH-0003sb-1P; Tue, 24 Nov 2020 19:07:47 +0000 Received: from host86-183-162-145.range86-183.btcentralplus.com ([86.183.162.145] helo=u2f063a87eabd5f.home) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1khdfG-0000r4-PC; Tue, 24 Nov 2020 19:07:46 +0000 From: Paul Durrant To: xen-devel@lists.xenproject.org Cc: Paul Durrant , Wei Liu , Jan Beulich , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Subject: [PATCH v3 01/13] viridian: don't blindly write to 32-bit registers is 'mode' is invalid Date: Tue, 24 Nov 2020 19:07:32 +0000 Message-Id: <20201124190744.11343-2-paul@xen.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20201124190744.11343-1-paul@xen.org> References: <20201124190744.11343-1-paul@xen.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Paul Durrant If hvm_guest_x86_mode() returns something other than 8 or 4 then viridian_hypercall() will return immediately but, on the way out, will write back status as if 'mode' was 4. This patch simply makes it leave the registers alone. NOTE: The formatting of the 'out' label and the switch statement are also adjusted as per CODING_STYLE. Signed-off-by: Paul Durrant --- Cc: Wei Liu Cc: Jan Beulich Cc: Andrew Cooper Cc: "Roger Pau Monné" v2: - New in v2 --- xen/arch/x86/hvm/viridian/viridian.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/xen/arch/x86/hvm/viridian/viridian.c b/xen/arch/x86/hvm/viridian/viridian.c index dc7183a54627..54035f75cb1a 100644 --- a/xen/arch/x86/hvm/viridian/viridian.c +++ b/xen/arch/x86/hvm/viridian/viridian.c @@ -692,13 +692,14 @@ int viridian_hypercall(struct cpu_user_regs *regs) break; } -out: + out: output.result = status; switch (mode) { case 8: regs->rax = output.raw; break; - default: + + case 4: regs->rdx = output.raw >> 32; regs->rax = (uint32_t)output.raw; break; -- 2.20.1