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[172.254.253.57]) by smtp.gmail.com with ESMTPSA id bm7sm3568612qkb.86.2021.11.02.04.07.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Nov 2021 04:07:54 -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=GxgKUblSc/AuTdeTrCoYEJS946D/KatMQ8ilg/nMD3U=; b=WUrOCNn0Fx8p9K2qnWZBibRuOakp5G4qvXPzOV1zMD688l/Ab5LA2oa+LW5QIDxGC/ mPwkuHDBEfKAEpXTzA6h1uPepGaK0qQ1rIzX5nMzgvfNxPEr99xQCZBCUcvOc6mWWYgb xm2IQSa08xmgStfgcdyt3nMYmtyVHNxnkA6gRCU7dHbCqE83WYigbL9AynGDM9uLTOBo kF3zrJIdjOuxRq7cW/6wI/0lO50cRvuIJ+YUGhPPNJu+0vV/Y0yhes/jRvLjRdt8gGYS XZChZi7Rh/B1UhzvyYOPyqtlq5kc/k9lMA/vwixW0qU/rh6ORG6jx7qDwCN4Feh9aW+Z Ho0A== 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=GxgKUblSc/AuTdeTrCoYEJS946D/KatMQ8ilg/nMD3U=; b=IYzQOguO9H4ZONGVApP3HYVuJsByIZ8rfJpsOMCnjwLywDMaMmrAUcMJ9RMRHdCiYE zO3ty8geSbON5ikoFxzxRzU2zG9II9VUVCbH48VZTwuiDxLGiKFxAUqWMsx2OD+LcEih IcZ1piY3uxXVGAEzyPJgpWesYBzBUj5xAdQU530LhRbrR7kONtzOTAaphoOAcBjjdO/o Zr13KFhe1E/gxaoIh5IV722W5sBxZQTjIHOqpL26ZMpSsp2rj4o9q98mW6Mwdb7ZpYwp 8OE6JY0q9RRI90/EW8Xn4dH5KHf95X79Ic29d+J+K/sTQ3jYzndsA/IRlEtlKYwaz7FV QWRA== X-Gm-Message-State: AOAM531Pye0Z0bxB6bH7qipOBhyqXE9hDZ2gJDHESCgBpQips16HFh8n F5+6zn3qomXV3GwQQp+g45nejhMx59rUkg== X-Google-Smtp-Source: ABdhPJwqAH/JVEzkdwIJDwS9BqByijqk8BTil4TIWxO3y0kRK6IHYbYNLK65/48zoT9YTPuc3X/D4Q== X-Received: by 2002:a05:620a:29c8:: with SMTP id s8mr11398713qkp.250.1635851275098; Tue, 02 Nov 2021 04:07:55 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PULL 23/60] target/arm: Implement arm_cpu_record_sigsegv Date: Tue, 2 Nov 2021 07:07:03 -0400 Message-Id: <20211102110740.215699-24-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211102110740.215699-1-richard.henderson@linaro.org> References: <20211102110740.215699-1-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::72d; envelope-from=richard.henderson@linaro.org; helo=mail-qk1-x72d.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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Warner Losh 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: 1635852731213100001 Content-Type: text/plain; charset="utf-8" Because of the complexity of setting ESR, continue to use arm_deliver_fault. This means we cannot remove the code within cpu_loop that decodes EXCP_DATA_ABORT and EXCP_PREFETCH_ABORT. But using the new hook means that we don't have to do the page_get_flags check manually, and we'll be able to restrict the tlb_fill hook to sysemu later. Reviewed-by: Warner Losh Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- target/arm/internals.h | 6 ++++++ target/arm/cpu.c | 6 ++++-- target/arm/cpu_tcg.c | 6 ++++-- target/arm/tlb_helper.c | 36 +++++++++++++++++++----------------- 4 files changed, 33 insertions(+), 21 deletions(-) diff --git a/target/arm/internals.h b/target/arm/internals.h index 3612107ab2..5a7aaf0f51 100644 --- a/target/arm/internals.h +++ b/target/arm/internals.h @@ -544,9 +544,15 @@ static inline bool arm_extabort_type(MemTxResult resul= t) return result !=3D MEMTX_DECODE_ERROR; } =20 +#ifdef CONFIG_USER_ONLY +void arm_cpu_record_sigsegv(CPUState *cpu, vaddr addr, + MMUAccessType access_type, + bool maperr, uintptr_t ra); +#else bool arm_cpu_tlb_fill(CPUState *cs, vaddr address, int size, MMUAccessType access_type, int mmu_idx, bool probe, uintptr_t retaddr); +#endif =20 static inline int arm_to_core_mmu_idx(ARMMMUIdx mmu_idx) { diff --git a/target/arm/cpu.c b/target/arm/cpu.c index 641a8c2d3d..7a18a58ca0 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -2031,10 +2031,12 @@ static const struct SysemuCPUOps arm_sysemu_ops =3D= { static const struct TCGCPUOps arm_tcg_ops =3D { .initialize =3D arm_translate_init, .synchronize_from_tb =3D arm_cpu_synchronize_from_tb, - .tlb_fill =3D arm_cpu_tlb_fill, .debug_excp_handler =3D arm_debug_excp_handler, =20 -#if !defined(CONFIG_USER_ONLY) +#ifdef CONFIG_USER_ONLY + .record_sigsegv =3D arm_cpu_record_sigsegv, +#else + .tlb_fill =3D arm_cpu_tlb_fill, .cpu_exec_interrupt =3D arm_cpu_exec_interrupt, .do_interrupt =3D arm_cpu_do_interrupt, .do_transaction_failed =3D arm_cpu_do_transaction_failed, diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c index 0d5adccf1a..7b3bea2fbb 100644 --- a/target/arm/cpu_tcg.c +++ b/target/arm/cpu_tcg.c @@ -898,10 +898,12 @@ static void pxa270c5_initfn(Object *obj) static const struct TCGCPUOps arm_v7m_tcg_ops =3D { .initialize =3D arm_translate_init, .synchronize_from_tb =3D arm_cpu_synchronize_from_tb, - .tlb_fill =3D arm_cpu_tlb_fill, .debug_excp_handler =3D arm_debug_excp_handler, =20 -#if !defined(CONFIG_USER_ONLY) +#ifdef CONFIG_USER_ONLY + .record_sigsegv =3D arm_cpu_record_sigsegv, +#else + .tlb_fill =3D arm_cpu_tlb_fill, .cpu_exec_interrupt =3D arm_v7m_cpu_exec_interrupt, .do_interrupt =3D arm_v7m_cpu_do_interrupt, .do_transaction_failed =3D arm_cpu_do_transaction_failed, diff --git a/target/arm/tlb_helper.c b/target/arm/tlb_helper.c index 3107f9823e..dc5860180f 100644 --- a/target/arm/tlb_helper.c +++ b/target/arm/tlb_helper.c @@ -147,28 +147,12 @@ void arm_cpu_do_transaction_failed(CPUState *cs, hwad= dr physaddr, arm_deliver_fault(cpu, addr, access_type, mmu_idx, &fi); } =20 -#endif /* !defined(CONFIG_USER_ONLY) */ - bool arm_cpu_tlb_fill(CPUState *cs, vaddr address, int size, MMUAccessType access_type, int mmu_idx, bool probe, uintptr_t retaddr) { ARMCPU *cpu =3D ARM_CPU(cs); ARMMMUFaultInfo fi =3D {}; - -#ifdef CONFIG_USER_ONLY - int flags =3D page_get_flags(useronly_clean_ptr(address)); - if (flags & PAGE_VALID) { - fi.type =3D ARMFault_Permission; - } else { - fi.type =3D ARMFault_Translation; - } - fi.level =3D 3; - - /* now we have a real cpu fault */ - cpu_restore_state(cs, retaddr, true); - arm_deliver_fault(cpu, address, access_type, mmu_idx, &fi); -#else hwaddr phys_addr; target_ulong page_size; int prot, ret; @@ -210,5 +194,23 @@ bool arm_cpu_tlb_fill(CPUState *cs, vaddr address, int= size, cpu_restore_state(cs, retaddr, true); arm_deliver_fault(cpu, address, access_type, mmu_idx, &fi); } -#endif } +#else +void arm_cpu_record_sigsegv(CPUState *cs, vaddr addr, + MMUAccessType access_type, + bool maperr, uintptr_t ra) +{ + ARMMMUFaultInfo fi =3D { + .type =3D maperr ? ARMFault_Translation : ARMFault_Permission, + .level =3D 3, + }; + ARMCPU *cpu =3D ARM_CPU(cs); + + /* + * We report both ESR and FAR to signal handlers. + * For now, it's easiest to deliver the fault normally. + */ + cpu_restore_state(cs, ra, true); + arm_deliver_fault(cpu, addr, access_type, MMU_USER_IDX, &fi); +} +#endif /* !defined(CONFIG_USER_ONLY) */ --=20 2.25.1