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[124.149.254.207]) by smtp.gmail.com with ESMTPSA id g33-20020a635221000000b0058ee60f8e4dsm19561891pgb.34.2024.01.01.17.58.14 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Jan 2024 17:58:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1704160696; x=1704765496; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=wg9EFLLWpi5SohBEjtuSdGlbfZAlBUwGcqfT4yUFvzU=; b=GwM1sn00+uFANYpDwleArGWWQbKqb+x2Ye8uELpxezt6ly8lDViscHGf9GLmTboUnL IZg+/ZPrF7HxqwANSXE6SNHe+X29hKHKy8Z38DIV79ry+DGppCeesqdHLq8eHiAJLd2Z ybZBziNa8SDpM0KVHQ3Ck8ZfvzUfeLdCjfLHZlC3StYzWyF1QyVhRMWU4FtRGOTwcGv5 cQ3rgLRdHtvxR5GB2oFpX7VaR73saI5OxTKViJwJiFl3i4KNP+a8hlf6Yc/VuFQJzO9I ZxvuCyprDe6yF8Mj7ChPn0JaEpOGzltnLKDtcoPwPNb/F9GbCDBhM0zoCcTxio7pBoXd /4cw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1704160696; x=1704765496; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=wg9EFLLWpi5SohBEjtuSdGlbfZAlBUwGcqfT4yUFvzU=; b=xRLLyMUnEdIBmoTBxLlntkS+dBkeWBLq5GqG93Uootsk+pV7bdrQ3+KNLGc2WpFp5i Q47kg3anNqHsJFQO957a4JO3U3C41Eem88oTZ7duzzyJxnBZX3IZji88c5Csr7CfoPYr qK924bpYbHJ35ykSt3iu+Y4CjHa37ga3QVIYwobsDtCz2/rB9cdTQ2QQLY9ly3CpSHo7 u8aY9ayv1kQvTBcJ1D5LCOX69sdGLtk/0Pm/boI1swjlUUZ0sHFck2LEM2Ad3R41SD90 WC80RNVcgZ78a10FDxi6vHOoTVqJHdi/OktlN51dQWbZuBUDb6NU4ZQ7fGQkT8o86gbu KBPg== X-Gm-Message-State: AOJu0Ywahs/kArV8N7G/v6MEpw9J3/YjwqgfzPSrzsmmqLf2sZn2xnwF llPCSOqBUbH6s/Jl1WY9G26Bq8IGtJyEky8ljsO56Wi6Kvg= X-Google-Smtp-Source: AGHT+IECdaUnI10UzsbunB4hFlq/2/1tgvSo9ONowlHk6M1VhGmEJVJv55F2h3OnSrZ2AdldN3yvuQ== X-Received: by 2002:a05:6a00:6a04:b0:6d9:9277:b702 with SMTP id hy4-20020a056a006a0400b006d99277b702mr15270836pfb.1.1704160696186; Mon, 01 Jan 2024 17:58:16 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v3 01/33] accel/tcg: Remove qemu_host_page_size from page_protect/page_unprotect Date: Tue, 2 Jan 2024 12:57:36 +1100 Message-Id: <20240102015808.132373-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240102015808.132373-1-richard.henderson@linaro.org> References: <20240102015808.132373-1-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::431; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x431.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: 1704160793231100003 Content-Type: text/plain; charset="utf-8" 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: Ilya Leoshkevich Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- 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