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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 D4DE5C17440 for ; Wed, 13 Nov 2019 02:25:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AEBB82246A for ; Wed, 13 Nov 2019 02:25:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573611907; bh=zyZYw0nM4RFgVaebb4BmvAOIVPjPO6GvSiUzaPlDJ34=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=eaaakt7WDkDdK6yTqZB+5J7vutBba4Q1V7/SGCx8BqnQ+r8/zslfHKKe7oyi3N1Ox wY8M5+PgEo9a8BkDuusKImTp8X1tdS8eSlsl0ukx25fN3PrLfDacRz8ClymwNuirYj X9MnkNPOtKzniMv+ln26F285f0RcxnxAo/eXMtok= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728005AbfKMBvt (ORCPT ); Tue, 12 Nov 2019 20:51:49 -0500 Received: from mail.kernel.org ([198.145.29.99]:39820 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727980AbfKMBvo (ORCPT ); Tue, 12 Nov 2019 20:51:44 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1F6B3222D3; Wed, 13 Nov 2019 01:51:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573609903; bh=zyZYw0nM4RFgVaebb4BmvAOIVPjPO6GvSiUzaPlDJ34=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=d6GznGTD8cYVF/UE8JZHRj6rdn4xrTERBvvRknnW+VXBOK/b4dG7EvMEZwGtz1RZA +rFRA1b9jocj/br4JAmiNFzHF4jLf1wzBjws/WQLFyua3Ux6J5FRnCvjYU3mQvhPs6 NmIduVrksDD+SajkVdV2Tlv5dCXHjZBuquL5CJWg= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "Naveen N. Rao" , Michael Ellerman , Sasha Levin , linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 4.19 056/209] powerpc/pseries: Fix how we iterate over the DTL entries Date: Tue, 12 Nov 2019 20:47:52 -0500 Message-Id: <20191113015025.9685-56-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191113015025.9685-1-sashal@kernel.org> References: <20191113015025.9685-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Naveen N. Rao" [ Upstream commit 9258227e9dd1da8feddb07ad9702845546a581c9 ] When CONFIG_VIRT_CPU_ACCOUNTING_NATIVE is not set, we look up dtl_idx in the lppaca to determine the number of entries in the buffer. Since lppaca is in big endian, we need to do an endian conversion before using this in our calculation to determine the number of entries in the buffer. Without this, we do not iterate over the existing entries in the DTL buffer properly. Fixes: 7c105b63bd98 ("powerpc: Add CONFIG_CPU_LITTLE_ENDIAN kernel config option.") Signed-off-by: Naveen N. Rao Signed-off-by: Michael Ellerman Signed-off-by: Sasha Levin --- arch/powerpc/platforms/pseries/dtl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/pseries/dtl.c b/arch/powerpc/platforms/pseries/dtl.c index c762689e0eb33..ef6595153642e 100644 --- a/arch/powerpc/platforms/pseries/dtl.c +++ b/arch/powerpc/platforms/pseries/dtl.c @@ -184,7 +184,7 @@ static void dtl_stop(struct dtl *dtl) static u64 dtl_current_index(struct dtl *dtl) { - return lppaca_of(dtl->cpu).dtl_idx; + return be64_to_cpu(lppaca_of(dtl->cpu).dtl_idx); } #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ -- 2.20.1