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[173.197.98.125]) by smtp.gmail.com with ESMTPSA id l12-20020a170902d34c00b001d8f81ecebesm10275500plk.192.2024.02.22.12.43.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Feb 2024 12:43:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1708634612; x=1709239412; 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=G2VXMZpzicQ4Dm28fmEM7ZpGthYgfI6UDANYII3bJPA=; b=SwfpMlbChj9GimvK00b40lmzlQeHldHj7r499f+741B7BIeowbyP6D6si+/My+1Cfx RmKgqCK/QVkLZ8u5CftMrA4vjSdzIcwXVcRC5lTlBIedSiXBJ8PRiPdsLk2ouekQATc4 Z4lYMeKg/Xkwfq0mQOsDeG2YdondWjStf8SOu7/g0j6sD0QfZoM1aSYk27hf4GA0s6dV QGsZQT8FFMGS4hCwNbzgqEPlV5h+2NfSMqL2rcOwZWgzfbYIbLhW7JPnP9v3eGU2UgZ8 ceZ65KvMKlFg5Bj7NbWD+WZhbvJmAuRp36BZb8yrpg0I8nC3LY3ZzbCTcHuHOPILL4mh tzjA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708634612; x=1709239412; 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=G2VXMZpzicQ4Dm28fmEM7ZpGthYgfI6UDANYII3bJPA=; b=j3CUbG4GqH3NVvoMfNouqz9Vo43wvUtvudhEIS0J+YdYJnS/LL5Z0Pi3OmsGinynSo vFf65Wt9Q0uTcwbw6qhEPD9xWq5n062VbS6LcAbnOK+gUQmn2NhstvVy/Nbxasi+3XPK w7WNVaSqFAHWUxG81m7yHjgTdtG6nnyCWDbc/t3+IIbEGjieMNrusfpv7wSh4Op1Skxq FS9Sgn8dbcxNpfH4A0mJOXRypxY2xfJ2JkjMQD2mXB4M8di+eXQ//8jQ1G/VYM5gr0gX T4fOL41InaF26ig/tavrhdxJPq9zcrJJ4Hh0OponFfvEtPzE0lfwPw0YtZ+IK/Kq9A0N 9sgA== X-Gm-Message-State: AOJu0YzXh9BAHPcjI5wpiIbgv+RvguIzyLdEc5h/g2jY69aet3C7mSO2 uu+NTVL4C7EpDubDPQorv20yqe8yiVjssq53YbpmHJooWdPNe6p9qSzpn4Cxdcv/R2GmC+xjiOH V X-Google-Smtp-Source: AGHT+IHslhyFBJCm6uPiyIGzPEI7Rf8m5cp/0bXtqZF8LH667ETcoPoyOEUE3pdQwWYdYkjOOSZzsQ== X-Received: by 2002:a17:902:6ac8:b0:1d9:f83e:3a54 with SMTP id i8-20020a1709026ac800b001d9f83e3a54mr17359368plt.64.1708634611972; Thu, 22 Feb 2024 12:43:31 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Ilya Leoshkevich , Helge Deller Subject: [PULL 04/39] accel/tcg: Remove qemu_host_page_size from page_protect/page_unprotect Date: Thu, 22 Feb 2024 10:42:48 -1000 Message-Id: <20240222204323.268539-5-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240222204323.268539-1-richard.henderson@linaro.org> References: <20240222204323.268539-1-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::634; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x634.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, T_SCC_BODY_TEXT_LINE=-0.01 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: 1708634809963100001 Use qemu_real_host_page_size instead. Except for the final mprotect within page_protect, we already handled host < target page size. Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Ilya Leoshkevich Acked-by: Helge Deller Message-Id: <20240102015808.132373-2-richard.henderson@linaro.org> --- accel/tcg/user-exec.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c index 68b252cb8e..69b7429e31 100644 --- a/accel/tcg/user-exec.c +++ b/accel/tcg/user-exec.c @@ -651,16 +651,17 @@ void page_protect(tb_page_addr_t address) { PageFlagsNode *p; target_ulong start, last; + int host_page_size =3D qemu_real_host_page_size(); int prot; =20 assert_memory_lock(); =20 - if (qemu_host_page_size <=3D TARGET_PAGE_SIZE) { + if (host_page_size <=3D TARGET_PAGE_SIZE) { start =3D address & TARGET_PAGE_MASK; last =3D start + TARGET_PAGE_SIZE - 1; } else { - start =3D address & qemu_host_page_mask; - last =3D start + qemu_host_page_size - 1; + start =3D address & -host_page_size; + last =3D start + host_page_size - 1; } =20 p =3D pageflags_find(start, last); @@ -671,7 +672,7 @@ void page_protect(tb_page_addr_t address) =20 if (unlikely(p->itree.last < last)) { /* More than one protection region covers the one host page. */ - assert(TARGET_PAGE_SIZE < qemu_host_page_size); + assert(TARGET_PAGE_SIZE < host_page_size); while ((p =3D pageflags_next(p, start, last)) !=3D NULL) { prot |=3D p->flags; } @@ -679,7 +680,7 @@ void page_protect(tb_page_addr_t address) =20 if (prot & PAGE_WRITE) { pageflags_set_clear(start, last, 0, PAGE_WRITE); - mprotect(g2h_untagged(start), qemu_host_page_size, + mprotect(g2h_untagged(start), last - start + 1, prot & (PAGE_READ | PAGE_EXEC) ? PROT_READ : PROT_NONE); } } @@ -725,18 +726,19 @@ int page_unprotect(target_ulong address, uintptr_t pc) } #endif } else { + int host_page_size =3D qemu_real_host_page_size(); target_ulong start, len, i; int prot; =20 - if (qemu_host_page_size <=3D TARGET_PAGE_SIZE) { + if (host_page_size <=3D TARGET_PAGE_SIZE) { start =3D address & TARGET_PAGE_MASK; len =3D TARGET_PAGE_SIZE; prot =3D p->flags | PAGE_WRITE; pageflags_set_clear(start, start + len - 1, PAGE_WRITE, 0); current_tb_invalidated =3D tb_invalidate_phys_page_unwind(star= t, pc); } else { - start =3D address & qemu_host_page_mask; - len =3D qemu_host_page_size; + start =3D address & -host_page_size; + len =3D host_page_size; prot =3D 0; =20 for (i =3D 0; i < len; i +=3D TARGET_PAGE_SIZE) { --=20 2.34.1