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[174.21.81.121]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-71ec13d73b1sm5438338b3a.105.2024.10.22.20.34.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Oct 2024 20:34:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1729654486; x=1730259286; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=E9BZ1D2dqbD5itfvWww7sIn9+uEnlW5x+Ejm53Jry8E=; b=IkRIFIesPfdi+wUdXS20D6AKTUCXhaRJDaUPU57HaAjQb95//d0wjFK+GNMZFSp8Pp lfzaW3wDjk5Cd9lowBbBBTakbsN/WuxjOtBtlW0LHqruYsW+t0fEBu9KnUYWVwudCEPN Xlg5RhoEyVubxX9LzSxCwBHeWhvItlONF6zEcSs2+mYCrf4O3c7EXbaLuLWJvRLNNLUf Wd8NVLUc06EpcczL8GdC8/M5rUQL1ym2lcKvnWWQcFlicRUU7x+24OxNSXl3FqCnhHC9 LhvsgWmzdNtrkNTfrN7XdwiGQdebYO8aCPiQvThEVKBBOC3wMKknV/stIFbVMnbKATqQ t75w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729654486; x=1730259286; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=E9BZ1D2dqbD5itfvWww7sIn9+uEnlW5x+Ejm53Jry8E=; b=YR4/k5PqBrfhfD3HczoW/55o5Uq5mLib7+R/8tab91rdM05sCHiTIdNTQrbutgZMYl QPAyCMySJEGXIKwhwRzKIMR40ODyyxAbt5keVtkmGMR9pNSKhT6Ozb5Fa0hbjhqMNSKH HybG5Mqm+/9XHSUV8ddpdsSEhg01xnmACE44HQ919SJUYTxT8gIEuipFV6qvc/dqWPhq 9W1jVQuixEstfvhODDuERzyyB5V22TlxYOBIDwgY1CuH1fa1INqjDU//IFzbNucw8rpK C0LmjC2vlQM6G4nRbPXeeK0QnUmbVMBsv87Px7NFTg17JkbnO+04L8igzf3MG6DUYlXf XR+w== X-Gm-Message-State: AOJu0YxkcFizdY8CusCZz1JqzwN9kf9Dsy3VKw+8+TMQhyUf9gMkyd9f ZQgGosWKkiQHas4zodPDEc7bFWY9sEg8b+EcpUGYZ/WxsjL3WjBgAqZbqlpMTtUUNK3ZpMwAqQU J X-Google-Smtp-Source: AGHT+IHzI4jDJAu5EumahZPEIqhIs+WHTEWc45oXxE4fEK0yknjTKWrGqWpyacy6p3VGpXmrp+wIxg== X-Received: by 2002:a05:6a21:6e41:b0:1d9:1fac:7256 with SMTP id adf61e73a8af0-1d978b358abmr1359260637.30.1729654486607; Tue, 22 Oct 2024 20:34:46 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= , Pierrick Bouvier Subject: [PULL 16/24] include/exec: Improve probe_access_full{, _mmu} documentation Date: Tue, 22 Oct 2024 20:34:24 -0700 Message-ID: <20241023033432.1353830-17-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241023033432.1353830-1-richard.henderson@linaro.org> References: <20241023033432.1353830-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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::530; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x530.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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1729654716945116600 Suggested-by: Alex Benn=C3=A9e Reviewed-by: Pierrick Bouvier Reviewed-by: Alex Benn=C3=A9e Signed-off-by: Richard Henderson Message-ID: <20241013184733.1423747-2-richard.henderson@linaro.org> --- include/exec/exec-all.h | 29 ++++++++++++++--------------- 1 file changed, 14 insertions(+), 15 deletions(-) diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index 72240ef426..2e4c4cc4b4 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -368,6 +368,13 @@ int probe_access_flags(CPUArchState *env, vaddr addr, = int size, * The CPUTLBEntryFull structure returned via @pfull is transient * and must be consumed or copied immediately, before any further * access or changes to TLB @mmu_idx. + * + * This function will not fault if @nonfault is set, but will + * return TLB_INVALID_MASK if the page is not mapped, or is not + * accessible with @access_type. + * + * This function will return TLB_MMIO in order to force the access + * to be handled out-of-line if plugins wish to instrument the access. */ int probe_access_full(CPUArchState *env, vaddr addr, int size, MMUAccessType access_type, int mmu_idx, @@ -375,22 +382,14 @@ int probe_access_full(CPUArchState *env, vaddr addr, = int size, CPUTLBEntryFull **pfull, uintptr_t retaddr); =20 /** - * probe_access_mmu() - Like probe_access_full except cannot fault and - * doesn't trigger instrumentation. + * probe_access_full_mmu: + * Like probe_access_full, except: * - * @env: CPUArchState - * @vaddr: virtual address to probe - * @size: size of the probe - * @access_type: read, write or execute permission - * @mmu_idx: softmmu index - * @phost: ptr to return value host address or NULL - * @pfull: ptr to return value CPUTLBEntryFull structure or NULL - * - * The CPUTLBEntryFull structure returned via @pfull is transient - * and must be consumed or copied immediately, before any further - * access or changes to TLB @mmu_idx. - * - * Returns: TLB flags as per probe_access_flags() + * This function is intended to be used for page table accesses by + * the target mmu itself. Since such page walking happens while + * handling another potential mmu fault, this function never raises + * exceptions (akin to @nonfault true for probe_access_full). + * Likewise this function does not trigger plugin instrumentation. */ int probe_access_full_mmu(CPUArchState *env, vaddr addr, int size, MMUAccessType access_type, int mmu_idx, --=20 2.43.0