From nobody Wed Feb 11 10:12:37 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; 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=fail(p=none dis=none) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1634273789150238.35225495861653; Thu, 14 Oct 2021 21:56:29 -0700 (PDT) Received: from localhost ([::1]:48174 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mbFGe-0008Lv-1l for importer@patchew.org; Fri, 15 Oct 2021 00:56:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39600) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mbEcB-0006r4-Pv for qemu-devel@nongnu.org; Fri, 15 Oct 2021 00:14:41 -0400 Received: from mail-pf1-x42c.google.com ([2607:f8b0:4864:20::42c]:44944) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mbEc9-0002s9-M2 for qemu-devel@nongnu.org; Fri, 15 Oct 2021 00:14:39 -0400 Received: by mail-pf1-x42c.google.com with SMTP id v8so3163199pfu.11 for ; Thu, 14 Oct 2021 21:14:37 -0700 (PDT) Received: from localhost.localdomain ([71.212.134.125]) by smtp.gmail.com with ESMTPSA id q8sm10236885pja.52.2021.10.14.21.14.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Oct 2021 21:14:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=tQ9zUqcauybUZbu3B5IksrNIUQen6fZFWQH9MsgW1Ec=; b=IB9jlkuJ2hEfEe9R/lGSIK+VBe2GZI8HMMg4llZabuKw0K/vn5ynPlf7je5V+6zO8x WAXfBWEvufH1yvJ3kf5v0faes/lkyo8NiNhlqgRRhmekhgkkh+fB+h7kte4PLYVKrslA 5k1iMksyUg1ZYrb2SlFxXSvrM1W00qCbZ8yLJ2+mKacNE8X+ogAmSLMc+J62GlUsaJv8 yXYx3b8FgcjP3UxAPqswM+GhU0PdnezInrQkDpbBhqVeVsEYX8gOhYHb7fOBXFQZ+tsL BC0jAM6C86K5G74DEHm4XLA1N/0AC6LC+ULNEnePCrwohnYAUogMBiRrqruZsZHMezEA +joA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=tQ9zUqcauybUZbu3B5IksrNIUQen6fZFWQH9MsgW1Ec=; b=LtczXO2P55EAGaVUcZz2WWlCCW+TkSlJDWgfT18p9seM7ibdQirce4Zg9Vv9e7cCCd EWi7dfprXxAEaUBTj/PTgQV3sGust3uyjfsSIOACZK4MoarCcqNguIBSDBFU46UY3I8A sbjxkMUMhyBpbQzJqCRY1xfZB/4sBuv1HztDCZOWUt0eLvccOOC3tkhEOwykSW7ZhjXR CF5N71UM31xqn3PUERPpy7sJclq3Zn5g/yXYgCSu5FBTaEseVI8q1CZexE7dlZehty12 3MKk25HZcEsweqB0Y9nRy3XuGBbXrCtjP4+7PIRepQy7Seq1AbPLLFDllzEmWewksBP5 sxKg== X-Gm-Message-State: AOAM530XcBTAt7oCbhqkrztZCpSskGZzA2d5VRGUM8/S0/CRnEGG08Gj f+0yCxKLSpZnRLDvsdnLd46gcN/T/EtL+w== X-Google-Smtp-Source: ABdhPJzH/UGrLLxP37+J0vKGl/3HYNYLyvd3ojvkGmiYr8QVP1es3Pbrhtwh7uXgwP54GAA1JEFicA== X-Received: by 2002:a63:e041:: with SMTP id n1mr7471986pgj.211.1634271276299; Thu, 14 Oct 2021 21:14:36 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v5 52/67] target/s390x: Implement s390x_cpu_record_sigbus Date: Thu, 14 Oct 2021 21:10:38 -0700 Message-Id: <20211015041053.2769193-53-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211015041053.2769193-1-richard.henderson@linaro.org> References: <20211015041053.2769193-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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::42c; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42c.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, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alex.bennee@linaro.org, laurent@vivier.eu, imp@bsdimp.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1634273791175100001 Content-Type: text/plain; charset="utf-8" For s390x, the only unaligned accesses that are signaled are atomic, and we don't actually want to raise SIGBUS for those, but instead raise a SPECIFICATION error, which the kernel will report as SIGILL. Split out a do_unaligned_access function to share between the user-only s390x_cpu_record_sigbus and the sysemu s390x_do_unaligned_access. Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- target/s390x/s390x-internal.h | 8 +++++--- target/s390x/cpu.c | 1 + target/s390x/tcg/excp_helper.c | 27 ++++++++++++++++++++------- 3 files changed, 26 insertions(+), 10 deletions(-) diff --git a/target/s390x/s390x-internal.h b/target/s390x/s390x-internal.h index 163aa4f94a..1a178aed41 100644 --- a/target/s390x/s390x-internal.h +++ b/target/s390x/s390x-internal.h @@ -270,18 +270,20 @@ ObjectClass *s390_cpu_class_by_name(const char *name); void s390x_cpu_debug_excp_handler(CPUState *cs); void s390_cpu_do_interrupt(CPUState *cpu); bool s390_cpu_exec_interrupt(CPUState *cpu, int int_req); -void s390x_cpu_do_unaligned_access(CPUState *cs, vaddr addr, - MMUAccessType access_type, int mmu_idx, - uintptr_t retaddr) QEMU_NORETURN; =20 #ifdef CONFIG_USER_ONLY void s390_cpu_record_sigsegv(CPUState *cs, vaddr address, MMUAccessType access_type, bool maperr, uintptr_t retaddr); +void s390_cpu_record_sigbus(CPUState *cs, vaddr address, + MMUAccessType access_type, uintptr_t retaddr); #else bool s390_cpu_tlb_fill(CPUState *cs, vaddr address, int size, MMUAccessType access_type, int mmu_idx, bool probe, uintptr_t retaddr); +void s390x_cpu_do_unaligned_access(CPUState *cs, vaddr addr, + MMUAccessType access_type, int mmu_idx, + uintptr_t retaddr) QEMU_NORETURN; #endif =20 =20 diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c index 593dda75c4..ccdbaf84d5 100644 --- a/target/s390x/cpu.c +++ b/target/s390x/cpu.c @@ -269,6 +269,7 @@ static const struct TCGCPUOps s390_tcg_ops =3D { =20 #ifdef CONFIG_USER_ONLY .record_sigsegv =3D s390_cpu_record_sigsegv, + .record_sigbus =3D s390_cpu_record_sigbus, #else .tlb_fill =3D s390_cpu_tlb_fill, .cpu_exec_interrupt =3D s390_cpu_exec_interrupt, diff --git a/target/s390x/tcg/excp_helper.c b/target/s390x/tcg/excp_helper.c index b923d080fc..4e7648f301 100644 --- a/target/s390x/tcg/excp_helper.c +++ b/target/s390x/tcg/excp_helper.c @@ -82,6 +82,19 @@ void HELPER(data_exception)(CPUS390XState *env, uint32_t= dxc) tcg_s390_data_exception(env, dxc, GETPC()); } =20 +/* + * Unaligned accesses are only diagnosed with MO_ALIGN. At the moment, + * this is only for the atomic operations, for which we want to raise a + * specification exception. + */ +static void QEMU_NORETURN do_unaligned_access(CPUState *cs, uintptr_t reta= ddr) +{ + S390CPU *cpu =3D S390_CPU(cs); + CPUS390XState *env =3D &cpu->env; + + tcg_s390_program_interrupt(env, PGM_SPECIFICATION, retaddr); +} + #if defined(CONFIG_USER_ONLY) =20 void s390_cpu_do_interrupt(CPUState *cs) @@ -106,6 +119,12 @@ void s390_cpu_record_sigsegv(CPUState *cs, vaddr addre= ss, cpu_loop_exit_restore(cs, retaddr); } =20 +void s390_cpu_record_sigbus(CPUState *cs, vaddr address, + MMUAccessType access_type, uintptr_t retaddr) +{ + do_unaligned_access(cs, retaddr); +} + #else /* !CONFIG_USER_ONLY */ =20 static inline uint64_t cpu_mmu_idx_to_asc(int mmu_idx) @@ -593,17 +612,11 @@ void s390x_cpu_debug_excp_handler(CPUState *cs) } } =20 -/* Unaligned accesses are only diagnosed with MO_ALIGN. At the moment, - this is only for the atomic operations, for which we want to raise a - specification exception. */ void s390x_cpu_do_unaligned_access(CPUState *cs, vaddr addr, MMUAccessType access_type, int mmu_idx, uintptr_t retaddr) { - S390CPU *cpu =3D S390_CPU(cs); - CPUS390XState *env =3D &cpu->env; - - tcg_s390_program_interrupt(env, PGM_SPECIFICATION, retaddr); + do_unaligned_access(cs, retaddr); } =20 static void QEMU_NORETURN monitor_event(CPUS390XState *env, --=20 2.25.1