From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.86_2) id 1hqaUc-0000jj-Pa for mharc-qemu-riscv@gnu.org; Thu, 25 Jul 2019 05:56:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45965) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqaUa-0000a5-IR for qemu-riscv@nongnu.org; Thu, 25 Jul 2019 05:56:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hqaUZ-0001ir-HN for qemu-riscv@nongnu.org; Thu, 25 Jul 2019 05:56:56 -0400 Received: from smtpe1.intersmtp.com ([213.121.35.76]:17257) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hqaUV-0001gr-00; Thu, 25 Jul 2019 05:56:51 -0400 Received: from tpw09926dag18e.domain1.systemhost.net (10.9.212.18) by BWP09926081.bt.com (10.36.82.112) 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 10:56:44 +0100 Received: from tpw09926dag18e.domain1.systemhost.net (10.9.212.18) by tpw09926dag18e.domain1.systemhost.net (10.9.212.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 25 Jul 2019 10:56:49 +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 10:56:49 +0100 From: To: CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , Thread-Topic: [Qemu-devel] [PATCH v4 12/15] cpu: TLB_FLAGS_MASK bit to force memory slow path Thread-Index: AQHVQs9GartZEa+ZA06Xyaret8gogg== Date: Thu, 25 Jul 2019 09:56:49 +0000 Message-ID: <1564048608923.3207@bt.com> References: <45d1ebe4b2ed4c039c9da20a738652df@tpw09926dag18e.domain1.systemhost.net> In-Reply-To: <45d1ebe4b2ed4c039c9da20a738652df@tpw09926dag18e.domain1.systemhost.net> 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] Content-Type: multipart/alternative; boundary="_000_15640486089233207btcom_" MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 213.121.35.76 Subject: [Qemu-riscv] [Qemu-devel] [PATCH v4 12/15] cpu: TLB_FLAGS_MASK bit to force memory slow path X-BeenThere: qemu-riscv@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Jul 2019 09:56:57 -0000 --_000_15640486089233207btcom_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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 --_000_15640486089233207btcom_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

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,<= /div>
there are no other side effects.

Signed-off-by: Tony Nguyen <tony.nguyen@bt.com>
---
 include/exec/cpu-all.h | 10 +++++++&= #43;--
 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 acce= ss */
 #define TLB_RECHECK         (1 << (TAR= GET_PAGE_BITS - 4))
+/* Set if TLB entry must take the slow path.  */
+#define TLB_FORCE_SLOW      (1 << (TARGET_PA= GE_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_M= MIO \
-                    = ;     | 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 agai= nst the
-- 
1.8.3.1



--_000_15640486089233207btcom_-- From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by 2002:a5d:51d0:0:0:0:0:0 with SMTP id n16csp10425437wrv; Thu, 25 Jul 2019 02:57:06 -0700 (PDT) X-Google-Smtp-Source: APXvYqxO/Snro9X7zn/GoAsB82i0dfgA91mvfUZ0Y/E/rJ2qtogNfscL0b+2n9+CPoMOx6CBSfOP X-Received: by 2002:a50:97c8:: with SMTP id f8mr75751129edb.176.1564048625973; Thu, 25 Jul 2019 02:57:05 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1564048625; cv=none; d=google.com; s=arc-20160816; b=ULig4sP1qFRFFSGKOg62jXr0RysD2ARh9dGcWRmf6MB6EQXeMor+uu90+gE2TM7+/0 TZ+VoVx7euH3nCtekehMl/NJhXg3JjVgF1AeZep2qpICB8w0uFWjuHlNFHOASxXynnt4 6r3hN13IoNTQyAyftEmwXQGAa8R2gYOLceaqUlmralraNlWldz1eb7rmEsN3k01+u1I+ bIaxeTg2OpaCJu5RGPOVXLxHOq+9MmiVNePh6ASOYPwRQkVPyPDtuJrkMk+bF7ssaTVh 01uhUwfylhl/F3KzBDTFitYTmS29ni7PiT59nYD3NqshhkM0tAiHMnhGVfeAdaf+aP5d cfVQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:cc:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:subject:mime-version :content-language:accept-language:in-reply-to:references:message-id :date:thread-index:thread-topic:to:from; bh=futZ6MdX3WZ5RhWzwri2XErYHA1Clx3++hKg00apDss=; b=wi6mrLfa6GrUSF4iKHwTzu8vOAue2G9ajHExJOyEDnaPwjkJhxUeXhNiA/ltUGA4TZ cpCRF4Rmh1EtLDBE3f/koe9f3+q3TTMuN06tiKyvm7zLsYjMITSM9aSha5ss9bGiA2zK iuhTidV/5hymwNgHxiOtEYuBCJb9N8tOLDsFxPYITN5Br75sbI9PtIWe9/wC4OY2mEiQ B0QJOGuvWHCoEUCDedPwIgF6FnuoLL6/i5CkEyLE+NDQ4iC8HneWMl5KG1wFPjq7XTsS aKcKOcO7taPygzUo5x/9EdfNB8kuftB8jUKjraDXC2vB06A7deCWWDXqiTglGY/y0iqS NvQA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=bt.com Return-Path: Received: from lists.gnu.org (lists.gnu.org. [209.51.188.17]) by mx.google.com with ESMTPS id g28si9622079edg.295.2019.07.25.02.57.05 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 25 Jul 2019 02:57:05 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; spf=pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=bt.com Received: from localhost ([::1]:57975 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqaUi-0000yu-QL for alex.bennee@linaro.org; Thu, 25 Jul 2019 05:57:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45983) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqaUd-0000o2-Np for qemu-arm@nongnu.org; Thu, 25 Jul 2019 05:57:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hqaUb-0001jy-KV for qemu-arm@nongnu.org; Thu, 25 Jul 2019 05:56:59 -0400 Received: from smtpe1.intersmtp.com ([213.121.35.76]:17257) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hqaUV-0001gr-00; Thu, 25 Jul 2019 05:56:51 -0400 Received: from tpw09926dag18e.domain1.systemhost.net (10.9.212.18) by BWP09926081.bt.com (10.36.82.112) 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 10:56:44 +0100 Received: from tpw09926dag18e.domain1.systemhost.net (10.9.212.18) by tpw09926dag18e.domain1.systemhost.net (10.9.212.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 25 Jul 2019 10:56:49 +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 10:56:49 +0100 From: To: Thread-Topic: [Qemu-devel] [PATCH v4 12/15] cpu: TLB_FLAGS_MASK bit to force memory slow path Thread-Index: AQHVQs9GartZEa+ZA06Xyaret8gogg== Date: Thu, 25 Jul 2019 09:56:49 +0000 Message-ID: <1564048608923.3207@bt.com> References: <45d1ebe4b2ed4c039c9da20a738652df@tpw09926dag18e.domain1.systemhost.net> In-Reply-To: <45d1ebe4b2ed4c039c9da20a738652df@tpw09926dag18e.domain1.systemhost.net> 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] Content-Type: multipart/alternative; boundary="_000_15640486089233207btcom_" MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 213.121.35.76 Subject: [Qemu-arm] [Qemu-devel] [PATCH v4 12/15] cpu: TLB_FLAGS_MASK bit to force memory slow path X-BeenThere: qemu-arm@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, sagark@eecs.berkeley.edu, david@redhat.com, palmer@sifive.com, mark.cave-ayland@ilande.co.uk, laurent@vivier.eu, Alistair.Francis@wdc.com, arikalo@wavecomp.com, pasic@linux.ibm.com, borntraeger@de.ibm.com, rth@twiddle.net, atar4qemu@gmail.com, ehabkost@redhat.com, qemu-s390x@nongnu.org, qemu-arm@nongnu.org, stefanha@redhat.com, shorne@gmail.com, david@gibson.dropbear.id.au, qemu-riscv@nongnu.org, kbastian@mail.uni-paderborn.de, cohuck@redhat.com, alex.williamson@redhat.com, qemu-ppc@nongnu.org, amarkovic@wavecomp.com, pbonzini@redhat.com, aurelien@aurel32.net Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: "Qemu-arm" X-TUID: TNYiumQrkp8p --_000_15640486089233207btcom_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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 --_000_15640486089233207btcom_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

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,<= /div>
there are no other side effects.

Signed-off-by: Tony Nguyen <tony.nguyen@bt.com>
---
 include/exec/cpu-all.h | 10 +++++++&= #43;--
 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 acce= ss */
 #define TLB_RECHECK         (1 << (TAR= GET_PAGE_BITS - 4))
+/* Set if TLB entry must take the slow path.  */
+#define TLB_FORCE_SLOW      (1 << (TARGET_PA= GE_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_M= MIO \
-                    = ;     | 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 agai= nst the
-- 
1.8.3.1



--_000_15640486089233207btcom_-- 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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 E4135C7618B for ; Thu, 25 Jul 2019 09:57:15 +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 BB6C920840 for ; Thu, 25 Jul 2019 09:57:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BB6C920840 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]:57985 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqaUt-0001lM-1M for qemu-devel@archiver.kernel.org; Thu, 25 Jul 2019 05:57:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46002) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqaUf-0000w2-Pa for qemu-devel@nongnu.org; Thu, 25 Jul 2019 05:57:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hqaUe-0001lJ-Nr for qemu-devel@nongnu.org; Thu, 25 Jul 2019 05:57:01 -0400 Received: from smtpe1.intersmtp.com ([213.121.35.76]:17257) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hqaUV-0001gr-00; Thu, 25 Jul 2019 05:56:51 -0400 Received: from tpw09926dag18e.domain1.systemhost.net (10.9.212.18) by BWP09926081.bt.com (10.36.82.112) 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 10:56:44 +0100 Received: from tpw09926dag18e.domain1.systemhost.net (10.9.212.18) by tpw09926dag18e.domain1.systemhost.net (10.9.212.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 25 Jul 2019 10:56:49 +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 10:56:49 +0100 From: To: Thread-Topic: [Qemu-devel] [PATCH v4 12/15] cpu: TLB_FLAGS_MASK bit to force memory slow path Thread-Index: AQHVQs9GartZEa+ZA06Xyaret8gogg== Date: Thu, 25 Jul 2019 09:56:49 +0000 Message-ID: <1564048608923.3207@bt.com> References: <45d1ebe4b2ed4c039c9da20a738652df@tpw09926dag18e.domain1.systemhost.net> In-Reply-To: <45d1ebe4b2ed4c039c9da20a738652df@tpw09926dag18e.domain1.systemhost.net> 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: 213.121.35.76 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, sagark@eecs.berkeley.edu, david@redhat.com, palmer@sifive.com, mark.cave-ayland@ilande.co.uk, laurent@vivier.eu, Alistair.Francis@wdc.com, edgar.iglesias@gmail.com, arikalo@wavecomp.com, pasic@linux.ibm.com, borntraeger@de.ibm.com, rth@twiddle.net, atar4qemu@gmail.com, ehabkost@redhat.com, qemu-s390x@nongnu.org, qemu-arm@nongnu.org, stefanha@redhat.com, shorne@gmail.com, david@gibson.dropbear.id.au, qemu-riscv@nongnu.org, kbastian@mail.uni-paderborn.de, 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