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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 50971C43215 for ; Fri, 15 Nov 2019 06:24:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2BB1020728 for ; Fri, 15 Nov 2019 06:24:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573799048; bh=+8tKJ5KwR1Yj3sezuqYeaOuoJLVjJ86dELGalxZYXKw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=LdKcojKX8fZpAJEv6quN6g44Hh3XWe8eTsh1I3kPl9FPS9uEbBgzL1DNn9qNPsTFE ymf3cjD678qM/cBPutN2UE9zA/5qUeVfj/0j5ax9Ks5Ooa0Hd7eTD9NfXLTE8EqKD+ lvPeVM8H3tQmlIKsZBfbC84fn335uVfu5zb03Zdg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727431AbfKOGVv (ORCPT ); Fri, 15 Nov 2019 01:21:51 -0500 Received: from mail.kernel.org ([198.145.29.99]:50856 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727471AbfKOGVu (ORCPT ); Fri, 15 Nov 2019 01:21:50 -0500 Received: from localhost (unknown [104.132.150.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EBC862053B; Fri, 15 Nov 2019 06:21:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573798910; bh=+8tKJ5KwR1Yj3sezuqYeaOuoJLVjJ86dELGalxZYXKw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n1DDy9bmbf5gMvFaLLojQfcHdyAowzClsqvoGXT+QpM444IeZsbfnwXAFULaznqI4 WgsAMWwmL6q8ydOnxg9eyUk+y5VYgU1c9pfFb/PNaJfv/Iyq8lCRXAfa2bYoHNZ46G 15M++xE+qWl/4r2hAYClhkUOvvLBmWgnqw4Y6LRg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jim Mattson , Paolo Bonzini , Thomas Gleixner , Ben Hutchings Subject: [PATCH 4.4 09/20] KVM: x86: use Intel speculation bugs and features as derived in generic x86 code Date: Fri, 15 Nov 2019 14:20:38 +0800 Message-Id: <20191115062011.042251416@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191115062006.854443935@linuxfoundation.org> References: <20191115062006.854443935@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Paolo Bonzini commit 0c54914d0c52a15db9954a76ce80fee32cf318f4 upstream. Similar to AMD bits, set the Intel bits from the vendor-independent feature and bug flags, because KVM_GET_SUPPORTED_CPUID does not care about the vendor and they should be set on AMD processors as well. Suggested-by: Jim Mattson Reviewed-by: Jim Mattson Signed-off-by: Paolo Bonzini Signed-off-by: Thomas Gleixner [bwh: Backported to 4.4: adjust context] Signed-off-by: Ben Hutchings Signed-off-by: Greg Kroah-Hartman --- arch/x86/kvm/cpuid.c | 7 +++++++ arch/x86/kvm/x86.c | 8 ++++++++ 2 files changed, 15 insertions(+) --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -447,6 +447,13 @@ static inline int __do_cpuid_ent(struct entry->ebx |= F(TSC_ADJUST); entry->edx &= kvm_cpuid_7_0_edx_x86_features; cpuid_mask(&entry->edx, CPUID_7_EDX); + if (boot_cpu_has(X86_FEATURE_IBPB) && + boot_cpu_has(X86_FEATURE_IBRS)) + entry->edx |= F(SPEC_CTRL); + if (boot_cpu_has(X86_FEATURE_STIBP)) + entry->edx |= F(INTEL_STIBP); + if (boot_cpu_has(X86_FEATURE_SSBD)) + entry->edx |= F(SPEC_CTRL_SSBD); /* * We emulate ARCH_CAPABILITIES in software even * if the host doesn't support it. --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1001,8 +1001,16 @@ u64 kvm_get_arch_capabilities(void) rdmsrl_safe(MSR_IA32_ARCH_CAPABILITIES, &data); + if (!boot_cpu_has_bug(X86_BUG_CPU_MELTDOWN)) + data |= ARCH_CAP_RDCL_NO; + if (!boot_cpu_has_bug(X86_BUG_SPEC_STORE_BYPASS)) + data |= ARCH_CAP_SSB_NO; + if (!boot_cpu_has_bug(X86_BUG_MDS)) + data |= ARCH_CAP_MDS_NO; + return data; } + EXPORT_SYMBOL_GPL(kvm_get_arch_capabilities); static bool __kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer)