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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2BE2EC433F5 for ; Sat, 29 Jan 2022 13:28:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345772AbiA2N2U (ORCPT ); Sat, 29 Jan 2022 08:28:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39708 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346162AbiA2N2T (ORCPT ); Sat, 29 Jan 2022 08:28:19 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 49B25C061714 for ; Sat, 29 Jan 2022 05:28:19 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 0F7D0B827C1 for ; Sat, 29 Jan 2022 13:28:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 23219C340E5; Sat, 29 Jan 2022 13:28:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643462896; bh=CQhohr8FohtIE10C3mnu8t6ho37Mfl9cYypYItodc9A=; h=Subject:To:Cc:From:Date:From; b=FmWbbIhKf0kV7TNttzmZYUd2Ilpw0QdSnhJu2ShXvSnSOQlJninyXdwvSSp1C3CLb Mw8G4vHgBq90Bm1nKlE07hbpm9FWzvKmhndUh/kZ5Qfsb6oK3OSp1vH9qnkH0Vuo2L 4JGvYibZQL9GR9bAbtypOSAv3tp1unsb2OnXidfY= Subject: FAILED: patch "[PATCH] KVM: x86: Sync the states size with the XCR0/IA32_XSS at, any" failed to apply to 4.19-stable tree To: likexu@tencent.com, pbonzini@redhat.com, seanjc@google.com Cc: From: Date: Sat, 29 Jan 2022 14:28:04 +0100 Message-ID: <16434628846184@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 05a9e065059e566f218f8778c4d17ee75db56c55 Mon Sep 17 00:00:00 2001 From: Like Xu Date: Wed, 26 Jan 2022 17:22:26 +0000 Subject: [PATCH] KVM: x86: Sync the states size with the XCR0/IA32_XSS at, any time XCR0 is reset to 1 by RESET but not INIT and IA32_XSS is zeroed by both RESET and INIT. The kvm_set_msr_common()'s handling of MSR_IA32_XSS also needs to update kvm_update_cpuid_runtime(). In the above cases, the size in bytes of the XSAVE area containing all states enabled by XCR0 or (XCRO | IA32_XSS) needs to be updated. For simplicity and consistency, existing helpers are used to write values and call kvm_update_cpuid_runtime(), and it's not exactly a fast path. Fixes: a554d207dc46 ("KVM: X86: Processor States following Reset or INIT") Cc: stable@vger.kernel.org Signed-off-by: Like Xu Signed-off-by: Sean Christopherson Message-Id: <20220126172226.2298529-4-seanjc@google.com> Signed-off-by: Paolo Bonzini diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 9c984eeed30c..5481d2259f02 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -11266,8 +11266,8 @@ void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) vcpu->arch.msr_misc_features_enables = 0; - vcpu->arch.xcr0 = XFEATURE_MASK_FP; - vcpu->arch.ia32_xss = 0; + __kvm_set_xcr(vcpu, 0, XFEATURE_MASK_FP); + __kvm_set_msr(vcpu, MSR_IA32_XSS, 0, true); } /* All GPRs except RDX (handled below) are zeroed on RESET/INIT. */