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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 4B67DC43144 for ; Fri, 29 Jun 2018 14:51:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0F44B27FFE for ; Fri, 29 Jun 2018 14:51:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0F44B27FFE Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936555AbeF2Ov1 (ORCPT ); Fri, 29 Jun 2018 10:51:27 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:32838 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932480AbeF2OvZ (ORCPT ); Fri, 29 Jun 2018 10:51:25 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 88A0281A812E; Fri, 29 Jun 2018 14:51:24 +0000 (UTC) Received: from localhost.localdomain (ovpn-117-106.ams2.redhat.com [10.36.117.106]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 2F35E2026D68; Fri, 29 Jun 2018 14:51:22 +0000 (UTC) Subject: Re: [PATCH v3 06/20] kvm: arm/arm64: Remove spurious WARN_ON To: Suzuki K Poulose , linux-arm-kernel@lists.infradead.org References: <1530270944-11351-1-git-send-email-suzuki.poulose@arm.com> <1530270944-11351-7-git-send-email-suzuki.poulose@arm.com> Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com, marc.zyngier@arm.com, cdall@kernel.org, julien.grall@arm.com, will.deacon@arm.com, catalin.marinas@arm.com, punit.agrawal@arm.com, qemu-devel@nongnu.org From: Auger Eric Message-ID: <57ac04d3-0bbf-a3a4-f9a4-140dac8fa021@redhat.com> Date: Fri, 29 Jun 2018 16:51:21 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <1530270944-11351-7-git-send-email-suzuki.poulose@arm.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Fri, 29 Jun 2018 14:51:24 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Fri, 29 Jun 2018 14:51:24 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'eric.auger@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Suzuki, On 06/29/2018 01:15 PM, Suzuki K Poulose wrote: > On a 4-level page table pgd entry can be empty, unlike a 3-level > page table. Remove the spurious WARN_ON() in stage_get_pud(). > > Cc: Marc Zyngier > Acked-by: Christoffer Dall > Signed-off-by: Suzuki K Poulose > --- > virt/kvm/arm/mmu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c > index 061e6b3..308171c 100644 > --- a/virt/kvm/arm/mmu.c > +++ b/virt/kvm/arm/mmu.c > @@ -976,7 +976,7 @@ static pud_t *stage2_get_pud(struct kvm *kvm, struct kvm_mmu_memory_cache *cache > pud_t *pud; > > pgd = kvm->arch.pgd + stage2_pgd_index(addr); > - if (WARN_ON(stage2_pgd_none(*pgd))) { > + if (stage2_pgd_none(*pgd)) { > if (!cache) > return NULL; > pud = mmu_memory_cache_alloc(cache); > Reviewed-by: Eric Auger Thanks Eric From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60775) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fYukE-0005GF-7i for qemu-devel@nongnu.org; Fri, 29 Jun 2018 10:51:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fYuk9-0006Sm-8e for qemu-devel@nongnu.org; Fri, 29 Jun 2018 10:51:30 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:49204 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fYuk9-0006Rt-3b for qemu-devel@nongnu.org; Fri, 29 Jun 2018 10:51:25 -0400 References: <1530270944-11351-1-git-send-email-suzuki.poulose@arm.com> <1530270944-11351-7-git-send-email-suzuki.poulose@arm.com> From: Auger Eric Message-ID: <57ac04d3-0bbf-a3a4-f9a4-140dac8fa021@redhat.com> Date: Fri, 29 Jun 2018 16:51:21 +0200 MIME-Version: 1.0 In-Reply-To: <1530270944-11351-7-git-send-email-suzuki.poulose@arm.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH v3 06/20] kvm: arm/arm64: Remove spurious WARN_ON List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Suzuki K Poulose , linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com, marc.zyngier@arm.com, cdall@kernel.org, julien.grall@arm.com, will.deacon@arm.com, catalin.marinas@arm.com, punit.agrawal@arm.com, qemu-devel@nongnu.org Hi Suzuki, On 06/29/2018 01:15 PM, Suzuki K Poulose wrote: > On a 4-level page table pgd entry can be empty, unlike a 3-level > page table. Remove the spurious WARN_ON() in stage_get_pud(). > > Cc: Marc Zyngier > Acked-by: Christoffer Dall > Signed-off-by: Suzuki K Poulose > --- > virt/kvm/arm/mmu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c > index 061e6b3..308171c 100644 > --- a/virt/kvm/arm/mmu.c > +++ b/virt/kvm/arm/mmu.c > @@ -976,7 +976,7 @@ static pud_t *stage2_get_pud(struct kvm *kvm, struct kvm_mmu_memory_cache *cache > pud_t *pud; > > pgd = kvm->arch.pgd + stage2_pgd_index(addr); > - if (WARN_ON(stage2_pgd_none(*pgd))) { > + if (stage2_pgd_none(*pgd)) { > if (!cache) > return NULL; > pud = mmu_memory_cache_alloc(cache); > Reviewed-by: Eric Auger Thanks Eric From mboxrd@z Thu Jan 1 00:00:00 1970 From: eric.auger@redhat.com (Auger Eric) Date: Fri, 29 Jun 2018 16:51:21 +0200 Subject: [PATCH v3 06/20] kvm: arm/arm64: Remove spurious WARN_ON In-Reply-To: <1530270944-11351-7-git-send-email-suzuki.poulose@arm.com> References: <1530270944-11351-1-git-send-email-suzuki.poulose@arm.com> <1530270944-11351-7-git-send-email-suzuki.poulose@arm.com> Message-ID: <57ac04d3-0bbf-a3a4-f9a4-140dac8fa021@redhat.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Suzuki, On 06/29/2018 01:15 PM, Suzuki K Poulose wrote: > On a 4-level page table pgd entry can be empty, unlike a 3-level > page table. Remove the spurious WARN_ON() in stage_get_pud(). > > Cc: Marc Zyngier > Acked-by: Christoffer Dall > Signed-off-by: Suzuki K Poulose > --- > virt/kvm/arm/mmu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c > index 061e6b3..308171c 100644 > --- a/virt/kvm/arm/mmu.c > +++ b/virt/kvm/arm/mmu.c > @@ -976,7 +976,7 @@ static pud_t *stage2_get_pud(struct kvm *kvm, struct kvm_mmu_memory_cache *cache > pud_t *pud; > > pgd = kvm->arch.pgd + stage2_pgd_index(addr); > - if (WARN_ON(stage2_pgd_none(*pgd))) { > + if (stage2_pgd_none(*pgd)) { > if (!cache) > return NULL; > pud = mmu_memory_cache_alloc(cache); > Reviewed-by: Eric Auger Thanks Eric