From nobody Mon Feb 9 09:28:36 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1767637068; cv=none; d=zohomail.com; s=zohoarc; b=Kve5mlvcYRasAOmoeViJ11cWv0KWDneg2EmQ+tu+TZ0vfcHFPCVLlK/holpaRZUVVq+Vjv+tLswwsemiFceKdM9JxsehL9frgsHmBkZLncYQhSxdjf8xa8E/QCGyDffxUpfxZ52dVV+5oMY5f+ukSOXPLrrQGP6OH9XhbpPkO3c= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1767637068; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=lBg62OAX3E08F+RaLpGGmFy6a2bx4DIQS0r0gGCTy2k=; b=aplym7Y/J5FAvIzTMPhqymTAiLcj368ODw5UKarjvPcQb8zIMM0nOudprhBFOxEv97alPIVmOE7kopUC9W5CJgKCjtsla4pwJQMTU8RN5kXyQIOtgaSFBBymJt08MSi6H9BR/HErfay3+ndEDJW+cc4deWxO88I7rv9HXBHKKJU= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1767637068044938.8390703448391; Mon, 5 Jan 2026 10:17:48 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vcp8d-00021Y-GG; Mon, 05 Jan 2026 13:17:09 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vcp7T-00017P-Ol for qemu-devel@nongnu.org; Mon, 05 Jan 2026 13:15:57 -0500 Received: from mail-qv1-xf33.google.com ([2607:f8b0:4864:20::f33]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1vcp7P-00037b-Eh for qemu-devel@nongnu.org; Mon, 05 Jan 2026 13:15:54 -0500 Received: by mail-qv1-xf33.google.com with SMTP id 6a1803df08f44-88a35a00506so1803356d6.2 for ; Mon, 05 Jan 2026 10:15:43 -0800 (PST) Received: from [192.168.1.204] ([185.213.193.254]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8907540e24csm3855706d6.25.2026.01.05.10.15.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Jan 2026 10:15:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1767636943; x=1768241743; darn=nongnu.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=lBg62OAX3E08F+RaLpGGmFy6a2bx4DIQS0r0gGCTy2k=; b=Oaxtex+uZmeiOPRD4ckzCxLMZ8DZpRF/3Ar8Lt6G2bYRxOFJtnuf03XI135oJdQRCh kxSG6qQ9wBaRH6gOincCdlAoehtGOIM+UuFsn+cGvpNL5O1zQBGb991g7HHAWOJFcjai 7pmq1jM9fCO4XfnxJawEMTUw9zP+HkOksjZBKzQFggheePLjVrkMzC2gDtDwl0Q++Zpn lZS2GOFpQFcN8ZwVm+ar7ghQKxLsHQ0u0X1aGNL+IAaD+OqryHFI23T4x6jhCJo+HO7r Lwz9+9oz1IrXbpGtJKPW89szX4Ponvwj2rjMLMfURlzoPhbyWILIO8+vOQBI4Q0Kj70J 2z4Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1767636943; x=1768241743; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=lBg62OAX3E08F+RaLpGGmFy6a2bx4DIQS0r0gGCTy2k=; b=gRmA36N2E7pB1MTUz1m7K0FotuhYXScjKWPFvFzfJUv+SWZUng7+1yfumYXrtkI9ay 91nP7UMlNaCsDEHZJRtNqiJsUQd73LC06I7DCGP6Iv8stNbRggIYCk6rOQGh8Ha2h5m4 yxO25aDKabScckpuLEJxZdgZjm3Dc8ashgthUoguT84oF9lqXvyseZRiXrO3/Nl8Olcq SEKwGmKFt/O2Uo4ema6eZFseyuRaSeagr5FqWAV9qtVz9JYX/SaUaz9nVIC9jX2SQw5G bOk6uj0p5UPjCF6Fbj/kk0QIA1sjpHe3txHMWwzVUW+rMPAeyPMZ30w+EoCePJdfKJz7 AKyw== X-Gm-Message-State: AOJu0YwulcIz6hylTCGM0J1jLdbqhBJO7WzYqP01jwnBIh60i16vh+7f NsEiwoaH+5KYpuAgbayOcmuKlkPydG/Uy/AiPLZBlEX7Wvui9g7iPpip X-Gm-Gg: AY/fxX5pqCNR/vKbaozm8qrL9av68qBg0r17bQoiOBoNDNgkIza+4vKPnh0BMt3qSGk SOHhbk4ofp1y4E56lpWBJpFkUngk8kDcyK1TX1tdJjGlonkPuW/7gYKVAAqlPVhmdXFYxHEN6nn p5aRvgsiaLSuGYcy5WvKEUtjcXTWXEzmcpv/sauNCivBaRcJrrW0PoR/XvpDWEnDlZafVRCZabk VLG7Eu4WMHwGNIolF7ThBhIn6spQobckmS6hsJjJG99OXnRip8sMqHkve7KOijy95QGtJN3WyhX DPFXVuAuM7OYnRg/qSL4qvpEKupDRrK8UEjFQBxIRaRsFVG8Z7Oyrf+suZMOZ2kTaUzzZ93edZa +iEV/YMjtDtxiHR7hu0NE2F8UByGi/RoUGPh+gkqhPWqoazoRZEkBX1u1oKrcyuJ3akFnPx4PV3 9TyJ4rh6n4qVUsqInzbrOy3LPWFaN7MHE1++E= X-Google-Smtp-Source: AGHT+IFSWUmtIxKZzzNjbqPG+nDQzGZsxjqb2s6uprhNZrL37pnDxgqdxVvNUQ6d9D755CvXg4LbZw== X-Received: by 2002:a05:6214:212f:b0:888:4930:82ab with SMTP id 6a1803df08f44-89075ef0f8amr6808826d6.71.1767636942550; Mon, 05 Jan 2026 10:15:42 -0800 (PST) From: Gabriel Brookman Date: Mon, 05 Jan 2026 11:15:01 -0700 Subject: [PATCH RFC v3 12/12] tests/tcg: add test for MTE_STORE_ONLY MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260105-feat-mte4-v3-12-86a0d99ef2e4@gmail.com> References: <20260105-feat-mte4-v3-0-86a0d99ef2e4@gmail.com> In-Reply-To: <20260105-feat-mte4-v3-0-86a0d99ef2e4@gmail.com> To: qemu-devel@nongnu.org Cc: Peter Maydell , Gustavo Romero , Richard Henderson , qemu-arm@nongnu.org, Laurent Vivier , Gabriel Brookman X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1767636923; l=3012; i=brookmangabriel@gmail.com; s=20251009; h=from:subject:message-id; bh=oP1ODAPtwy+eL+2EWDk5uY7d+uGhjgcod/Aq0fXi/cA=; b=a8vIto7Ubr6PS+0Ic34wh8gRwf+dBz5gqURjRVqu8iQ/nCVyvGVOlZr4JIzQHgLjLRXKeBOXj f2OB2HY3CjUCF0MpP2KiqpOzMyTK1sAG/YvK+2zRWXxguY4WtoPcJdS X-Developer-Key: i=brookmangabriel@gmail.com; a=ed25519; pk=m9TtPDal6WzoHNnQiHHKf8dTrv3DUCPUUTujuo8vNrw= Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::f33; envelope-from=brookmangabriel@gmail.com; helo=mail-qv1-xf33.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1767637068572158500 Added a test that checks that MTE checks are not performed on loads when MTE_STORE_ONLY is enabled. Signed-off-by: Gabriel Brookman Reviewed-by: Richard Henderson --- tests/tcg/aarch64/Makefile.target | 2 +- tests/tcg/aarch64/mte-10.c | 49 +++++++++++++++++++++++++++++++++++= ++++ tests/tcg/aarch64/mte.h | 12 ++++++++++ 3 files changed, 62 insertions(+), 1 deletion(-) diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile= .target index b491cfb5e1..6203ac9b51 100644 --- a/tests/tcg/aarch64/Makefile.target +++ b/tests/tcg/aarch64/Makefile.target @@ -64,7 +64,7 @@ AARCH64_TESTS +=3D bti-2 =20 # MTE Tests ifneq ($(CROSS_CC_HAS_ARMV8_MTE),) -AARCH64_TESTS +=3D mte-1 mte-2 mte-3 mte-4 mte-5 mte-6 mte-7 mte-8 mte-9 +AARCH64_TESTS +=3D mte-1 mte-2 mte-3 mte-4 mte-5 mte-6 mte-7 mte-8 mte-9 m= te-10 mte-%: CFLAGS +=3D $(CROSS_CC_HAS_ARMV8_MTE) endif =20 diff --git a/tests/tcg/aarch64/mte-10.c b/tests/tcg/aarch64/mte-10.c new file mode 100644 index 0000000000..a6495e4bf4 --- /dev/null +++ b/tests/tcg/aarch64/mte-10.c @@ -0,0 +1,49 @@ +/* + * Memory tagging, write-only tag checking + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "mte.h" + +void pass(int sig, siginfo_t *info, void *uc) +{ + exit(0); +} + +int main(int ac, char **av) +{ + struct sigaction sa; + int *p0, *p1, *p2; + long excl =3D 1; + + enable_mte_store_only(PR_MTE_TCF_SYNC); + p0 =3D alloc_mte_mem(sizeof(*p0)); + + /* Create two differently tagged pointers. */ + asm("irg %0,%1,%2" : "=3Dr"(p1) : "r"(p0), "r"(excl)); + asm("gmi %0,%1,%0" : "+r"(excl) : "r" (p1)); + assert(excl !=3D 1); + asm("irg %0,%1,%2" : "=3Dr"(p2) : "r"(p0), "r"(excl)); + assert(p1 !=3D p2); + + /* Store the tag from the first pointer. */ + asm("stg %0, [%0]" : : "r"(p1)); + + /* + * We write to p1 (stg above makes this check pass) and read from + * p2 (improperly tagged, but since it's a read, we don't care). + */ + *p1 =3D *p2; + + /* enable handler */ + memset(&sa, 0, sizeof(sa)); + sa.sa_sigaction =3D pass; + sa.sa_flags =3D SA_SIGINFO; + sigaction(SIGSEGV, &sa, NULL); + + /* now we write to badly checked p2, should fault. */ + *p2 =3D 0; + + abort(); +} diff --git a/tests/tcg/aarch64/mte.h b/tests/tcg/aarch64/mte.h index 17b932f3f1..1d3ebf8696 100644 --- a/tests/tcg/aarch64/mte.h +++ b/tests/tcg/aarch64/mte.h @@ -51,6 +51,18 @@ static void enable_mte(int tcf) } } =20 +static void enable_mte_store_only(int tcf) +{ + int r =3D prctl(PR_SET_TAGGED_ADDR_CTRL, + PR_TAGGED_ADDR_ENABLE | PR_MTE_STORE_ONLY | tcf | + (0xfffe << PR_MTE_TAG_SHIFT), + 0, 0, 0); + if (r < 0) { + perror("PR_SET_TAGGED_ADDR_CTRL"); + exit(2); + } +} + static void * alloc_mte_mem(size_t size) __attribute__((unused)); static void * alloc_mte_mem(size_t size) { --=20 2.52.0