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=-6.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,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 3EC83C76191 for ; Thu, 25 Jul 2019 08:05:45 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1ADE521901 for ; Thu, 25 Jul 2019 08:05:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1ADE521901 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=bt.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:56874 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqYky-0001f0-EY for qemu-devel@archiver.kernel.org; Thu, 25 Jul 2019 04:05:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38471) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqYko-0001Aa-DB for qemu-devel@nongnu.org; Thu, 25 Jul 2019 04:05:35 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hqYkn-0003gh-8y for qemu-devel@nongnu.org; Thu, 25 Jul 2019 04:05:34 -0400 Received: from smtpe1.intersmtp.com ([213.121.35.72]:55312) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hqYkc-0003Y7-T9; Thu, 25 Jul 2019 04:05:23 -0400 Received: from tpw09926dag18g.domain1.systemhost.net (10.9.212.34) by BWP09926077.bt.com (10.36.82.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.1.1713.5; Thu, 25 Jul 2019 09:05:10 +0100 Received: from tpw09926dag18e.domain1.systemhost.net (10.9.212.18) by tpw09926dag18g.domain1.systemhost.net (10.9.212.34) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 25 Jul 2019 09:05:17 +0100 Received: from tpw09926dag18e.domain1.systemhost.net ([fe80::a946:6348:ccf4:fa6c]) by tpw09926dag18e.domain1.systemhost.net ([fe80::a946:6348:ccf4:fa6c%12]) with mapi id 15.00.1395.000; Thu, 25 Jul 2019 09:05:17 +0100 From: To: Thread-Topic: [Qemu-devel] [PATCH v4 12/15] cpu: TLB_FLAGS_MASK bit to force memory slow path Thread-Index: AQHVQr+y/H9707CquU6/1OwIMKzlIg== Date: Thu, 25 Jul 2019 08:05:17 +0000 Message-ID: <1564041917034.8581@bt.com> References: , <1563810716254.18886@bt.com>, <1564038073754.91133@bt.com>, <1564041524365.23360@bt.com> In-Reply-To: <1564041524365.23360@bt.com> Accept-Language: en-AU, en-GB, en-US Content-Language: en-AU X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.187.101.42] MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 213.121.35.72 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.23 Subject: [Qemu-devel] [PATCH v4 12/15] cpu: TLB_FLAGS_MASK bit to force memory slow path X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, walling@linux.ibm.com, mst@redhat.com, palmer@sifive.com, mark.cave-ayland@ilande.co.uk, Alistair.Francis@wdc.com, arikalo@wavecomp.com, david@redhat.com, pasic@linux.ibm.com, borntraeger@de.ibm.com, rth@twiddle.net, atar4qemu@gmail.com, ehabkost@redhat.com, sw@weilnetz.de, qemu-s390x@nongnu.org, qemu-arm@nongnu.org, david@gibson.dropbear.id.au, qemu-riscv@nongnu.org, cohuck@redhat.com, alex.williamson@redhat.com, qemu-ppc@nongnu.org, amarkovic@wavecomp.com, pbonzini@redhat.com, aurelien@aurel32.net Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The fast path is taken when TLB_FLAGS_MASK is all zero. TLB_FORCE_SLOW is simply a TLB_FLAGS_MASK bit to force the slow path, there are no other side effects. Signed-off-by: Tony Nguyen --- include/exec/cpu-all.h | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h index 536ea58..e496f99 100644 --- a/include/exec/cpu-all.h +++ b/include/exec/cpu-all.h @@ -331,12 +331,18 @@ CPUArchState *cpu_copy(CPUArchState *env); #define TLB_MMIO (1 << (TARGET_PAGE_BITS - 3)) /* Set if TLB entry must have MMU lookup repeated for every access */ #define TLB_RECHECK (1 << (TARGET_PAGE_BITS - 4)) +/* Set if TLB entry must take the slow path. */ +#define TLB_FORCE_SLOW (1 << (TARGET_PAGE_BITS - 5)) /* Use this mask to check interception with an alignment mask * in a TCG backend. */ -#define TLB_FLAGS_MASK (TLB_INVALID_MASK | TLB_NOTDIRTY | TLB_MMIO \ - | TLB_RECHECK) +#define TLB_FLAGS_MASK \ + (TLB_INVALID_MASK \ + | TLB_NOTDIRTY \ + | TLB_MMIO \ + | TLB_RECHECK \ + | TLB_FORCE_SLOW) /** * tlb_hit_page: return true if page aligned @addr is a hit against the -- 1.8.3.1