From patchwork Fri May 22 12:52:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kirill A . Shutemov" X-Patchwork-Id: 11565597 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9626F90 for ; Fri, 22 May 2020 12:53:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 813752072C for ; Fri, 22 May 2020 12:53:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=shutemov-name.20150623.gappssmtp.com header.i=@shutemov-name.20150623.gappssmtp.com header.b="RPoE0F31" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730195AbgEVMxV (ORCPT ); Fri, 22 May 2020 08:53:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38602 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729922AbgEVMw0 (ORCPT ); Fri, 22 May 2020 08:52:26 -0400 Received: from mail-lj1-x242.google.com (mail-lj1-x242.google.com [IPv6:2a00:1450:4864:20::242]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CE3A6C08C5C1 for ; Fri, 22 May 2020 05:52:25 -0700 (PDT) Received: by mail-lj1-x242.google.com with SMTP id c11so10326248ljn.2 for ; Fri, 22 May 2020 05:52:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shutemov-name.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=pE6faVejbkAIUEORvfpEBGX8dWE5OEtccf8+g3bpDfA=; b=RPoE0F31yzBfOvWe7SLr/WKR/C2Sx4Gh7bwAeclpxq0/Vb+GNjxAJuEDdywAhAV+rG LPSwpxjdhaPrO6tPK9kLyU9lN+J2ICMlxxas0V3l5kGBMo3GGtqma7ZKf2e7FtyzTZqS KG5R8274XsAkdGpxCT1EQsqp3V4eoAOQ4oqvJ4wtWaqB9Ir9xHzwM7bFrSpATnNTj6er 1QQiE6gfmsKimMLDlHETHNkpXH6oKGpbXDEkowiisx49AcyncgVvc25A2cOV7mVWKXHV 79ghSiISaygzuziCXm5Lg5/wF/eQqqmW0HwJzq/V+XbVuTqhqr1DrqhesngodJsRG9EX SMCg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=pE6faVejbkAIUEORvfpEBGX8dWE5OEtccf8+g3bpDfA=; b=Ap7dnJHJCVusquAUguMotGrjrAMKFgEE/OAgpPL6hn534+Oixv2K6lUlxTMGPkJsSp r576uy5cADE/7pDDl4/J8Ei0nfSjEK2ydktATI/gR71YjAnkTcT2RPK701dUGP+JFSG7 Wio3PPV4PxUB3X6JmSa9/yG9O+UyILd0x6SFu6Q/i2d0QG4mPK7BfiGppJXCtD5aWNVa i8OGStlj4LJOiEn9b7rfM7d6Gmj/66DT/IgJw0q5x04peHfgeo8iCJVp+NLX6kno66Py ssR4XpZWWrtNdJl78sR1XH0CYJgRLJEXB1L5nhSPPReR89pCZAzI1GmebbM4fulZx+77 U5mg== X-Gm-Message-State: AOAM533cP9TIle+VeSbSluplAqoonPvPeifReS9hX6+d9ksAZ1Cf1cAh rvv/kTMc26rw7Shu4TCFwnaEYA== X-Google-Smtp-Source: ABdhPJxgFPaCjAkcKRCcIN9VQB3EgCJQ/VVHg9h7HUrXezHSNTMlbVQq98oVAeqSL+RKdW5J2/HvFQ== X-Received: by 2002:a05:651c:2ce:: with SMTP id f14mr7217431ljo.87.1590151944358; Fri, 22 May 2020 05:52:24 -0700 (PDT) Received: from box.localdomain ([86.57.175.117]) by smtp.gmail.com with ESMTPSA id t22sm2303766ljk.11.2020.05.22.05.52.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 May 2020 05:52:22 -0700 (PDT) From: "Kirill A. Shutemov" X-Google-Original-From: "Kirill A. Shutemov" Received: by box.localdomain (Postfix, from userid 1000) id 0ABFA10205B; Fri, 22 May 2020 15:52:20 +0300 (+03) To: Dave Hansen , Andy Lutomirski , Peter Zijlstra , Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel Cc: David Rientjes , Andrea Arcangeli , Kees Cook , Will Drewry , "Edgecombe, Rick P" , "Kleen, Andi" , x86@kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [RFC 13/16] x86/kvmclock: Share hvclock memory with the host Date: Fri, 22 May 2020 15:52:11 +0300 Message-Id: <20200522125214.31348-14-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200522125214.31348-1-kirill.shutemov@linux.intel.com> References: <20200522125214.31348-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org hvclock is shared between the guest and the hypervisor. It has to be accessible by host. Signed-off-by: Kirill A. Shutemov --- arch/x86/kernel/kvmclock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c index 34b18f6eeb2c..ac6c2abe0d0f 100644 --- a/arch/x86/kernel/kvmclock.c +++ b/arch/x86/kernel/kvmclock.c @@ -253,7 +253,7 @@ static void __init kvmclock_init_mem(void) * hvclock is shared between the guest and the hypervisor, must * be mapped decrypted. */ - if (sev_active()) { + if (sev_active() || kvm_mem_protected()) { r = set_memory_decrypted((unsigned long) hvclock_mem, 1UL << order); if (r) {