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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, 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=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 C1D7DC07E9E for ; Mon, 12 Jul 2021 06:53:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AB44B611BF for ; Mon, 12 Jul 2021 06:53:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240736AbhGLG4T (ORCPT ); Mon, 12 Jul 2021 02:56:19 -0400 Received: from mail.kernel.org ([198.145.29.99]:34334 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236218AbhGLGkt (ORCPT ); Mon, 12 Jul 2021 02:40:49 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 81ACD610E5; Mon, 12 Jul 2021 06:37:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626071872; bh=PXb2Jt7LH3zPrEkslchl23TlNBsAyoMWyQyb3AGHGac=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pUzT8wN4fu+2TMDoVIqNUoGVxT0aQpR84evwUjv/SQWOOXM5cuTYUAGxQZnyPhVCM zVnA98iRGS18L3V6Lf56Ko0geewhkBt3yGZ+M34dDa7/n19MfPZ0mgZI2puM1sxUyp GaNFi7NZ+b9dli38/3ok3xrKRvsPuFV/Y861FFr0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sean Christopherson , Ben Gardon , Kai Huang , Paolo Bonzini , Sasha Levin Subject: [PATCH 5.10 257/593] KVM: x86/mmu: Fix return value in tdp_mmu_map_handle_target_level() Date: Mon, 12 Jul 2021 08:06:57 +0200 Message-Id: <20210712060911.380243236@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060843.180606720@linuxfoundation.org> References: <20210712060843.180606720@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kai Huang [ Upstream commit 57a3e96d6d17ae5ac9861ef34af024a627f1c3bb ] Currently tdp_mmu_map_handle_target_level() returns 0, which is RET_PF_RETRY, when page fault is actually fixed. This makes kvm_tdp_mmu_map() also return RET_PF_RETRY in this case, instead of RET_PF_FIXED. Fix by initializing ret to RET_PF_FIXED. Note that kvm_mmu_page_fault() resumes guest on both RET_PF_RETRY and RET_PF_FIXED, which means in practice returning the two won't make difference, so this fix alone won't be necessary for stable tree. Fixes: bb18842e2111 ("kvm: x86/mmu: Add TDP MMU PF handler") Reviewed-by: Sean Christopherson Reviewed-by: Ben Gardon Signed-off-by: Kai Huang Message-Id: Signed-off-by: Paolo Bonzini Signed-off-by: Sasha Levin --- arch/x86/kvm/mmu/tdp_mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index 61c00f8631f1..f2ddf663e72e 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -527,7 +527,7 @@ static int tdp_mmu_map_handle_target_level(struct kvm_vcpu *vcpu, int write, kvm_pfn_t pfn, bool prefault) { u64 new_spte; - int ret = 0; + int ret = RET_PF_FIXED; int make_spte_ret = 0; if (unlikely(is_noslot_pfn(pfn))) { -- 2.30.2