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Mon, 09 Mar 2026 15:00:55 -0700 (PDT) Received: from [172.26.74.149] ([185.213.193.97]) by smtp.gmail.com with ESMTPSA id 00721157ae682-7990a54ba7csm5218437b3.19.2026.03.09.15.00.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Mar 2026 15:00:54 -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: 7bit 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=; 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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 += bti-2 # MTE Tests ifneq ($(CROSS_CC_HAS_ARMV8_MTE),) -AARCH64_TESTS += mte-1 mte-2 mte-3 mte-4 mte-5 mte-6 mte-7 mte-8 +AARCH64_TESTS += mte-1 mte-2 mte-3 mte-4 mte-5 mte-6 mte-7 mte-8 mte-9 mte-%: CFLAGS += $(CROSS_CC_HAS_ARMV8_MTE) endif 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 == info->si_addr); + exit(0); +} + +int main(int ac, char **av) +{ + struct sigaction sa; + int *p0, *p1, *p2; + long excl = 1; + + enable_mte(PR_MTE_TCF_SYNC); + p0 = alloc_mte_mem(sizeof(*p0)); + + /* Create two differently tagged pointers. */ + asm("irg %0,%1,%2" : "=r"(p1) : "r"(p0), "r"(excl)); + asm("gmi %0,%1,%0" : "+r"(excl) : "r" (p1)); + assert(excl != 1); + asm("irg %0,%1,%2" : "=r"(p2) : "r"(p0), "r"(excl)); + assert(p1 != p2); + + /* Store the tag from the first pointer. */ + asm("stg %0, [%0]" : : "r"(p1)); + + *p1 = 0; + + memset(&sa, 0, sizeof(sa)); + sa.sa_sigaction = pass; + sa.sa_flags = SA_SIGINFO; + sigaction(SIGSEGV, &sa, NULL); + + faulting_ptr = p2; + *p2 = 0; + + abort(); +} -- 2.52.0