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Mon, 09 Mar 2026 15:00:55 -0700 (PDT) From: Gabriel Brookman Date: Mon, 09 Mar 2026 17:59:44 -0400 Subject: [PATCH v4 12/13] tests/tcg: add test for MTE FAR MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260309-feat-mte4-v4-12-daaf0375620d@gmail.com> References: <20260309-feat-mte4-v4-0-daaf0375620d@gmail.com> In-Reply-To: <20260309-feat-mte4-v4-0-daaf0375620d@gmail.com> To: qemu-devel@nongnu.org Cc: Peter Maydell , Gustavo Romero , Richard Henderson , qemu-arm@nongnu.org, Laurent Vivier , Pierrick Bouvier , Gabriel Brookman X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1773093641; l=2355; i=brookmangabriel@gmail.com; s=20251009; h=from:subject:message-id; bh=9H3S2yi32msQiijkL2anIOhzD686SvaCB6f4b0JzVdc=; b=hccPwX2VbR1d0TJREpIbLnyKtTf+Q/fXtn0osOMEbhuTwYiT93x+mOiyPOWUrepfQtUcMtB8V xlCxFT5W1JiBJkGWaEV8TmpYehQQGCx09K2ZbVXC14D2Z/mGk3/KNwJ 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 client-ip=2607:f8b0:4864:20::112e; envelope-from=brookmangabriel@gmail.com; helo=mail-yw1-x112e.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=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development 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: 1773093749372158500 This functionality was previously enabled but not advertised or tested. This commit adds a new test, mte-9, that tests the code for proper full-address reporting. FEAT_MTE_TAGGED_FAR requires that FAR_ELx report the full logical address, including tag bits. Signed-off-by: Gabriel Brookman Reviewed-by: Richard Henderson --- tests/tcg/aarch64/Makefile.target | 2 +- tests/tcg/aarch64/mte-9.c | 48 +++++++++++++++++++++++++++++++++++= ++++ 2 files changed, 49 insertions(+), 1 deletion(-) diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile= .target index 9fa8687453..b491cfb5e1 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 +AARCH64_TESTS +=3D mte-1 mte-2 mte-3 mte-4 mte-5 mte-6 mte-7 mte-8 mte-9 mte-%: CFLAGS +=3D $(CROSS_CC_HAS_ARMV8_MTE) endif =20 diff --git a/tests/tcg/aarch64/mte-9.c b/tests/tcg/aarch64/mte-9.c new file mode 100644 index 0000000000..9626a90c13 --- /dev/null +++ b/tests/tcg/aarch64/mte-9.c @@ -0,0 +1,48 @@ +/* + * Memory tagging, full-address reporting. + * + * Copyright (c) 2021 Linaro Ltd + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "mte.h" + +static void *faulting_ptr; + +void pass(int sig, siginfo_t *info, void *uc) +{ + assert(faulting_ptr =3D=3D info->si_addr); + exit(0); +} + +int main(int ac, char **av) +{ + struct sigaction sa; + int *p0, *p1, *p2; + long excl =3D 1; + + enable_mte(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)); + + *p1 =3D 0; + + memset(&sa, 0, sizeof(sa)); + sa.sa_sigaction =3D pass; + sa.sa_flags =3D SA_SIGINFO; + sigaction(SIGSEGV, &sa, NULL); + + faulting_ptr =3D p2; + *p2 =3D 0; + + abort(); +} --=20 2.52.0