From nobody Sun Nov 24 01:31:28 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1728158883; cv=none; d=zohomail.com; s=zohoarc; b=Oy08IAK3nmGjHLnjAkcyZEBu75uQUyGUuGM6h2pmWt+SIh6TeTSeMy3RVlNLgfXLrmJLAizW0+cgNUOtZ5MpKbrPw4h4m5yDXRfQznW6E/M5zqLHtYEfPx0i9qmSVV80ELetZqgLzTMMaERdlmKbimSmUpOuzqdI8ouluQfqbY8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1728158883; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=Qpc+gtvz4QF2D7U7hwk6I/PwDTmOhNNc5A8A2G2CqV8=; b=a0yd9zwOISmp89kMsPAGmfp6i1AiuXIfJMu4jVhbvXyEXBvkNADdLyEpTiymaLNf9/kYCUMWkNg7Kz/HNr67Bl6LQ9WW2m485EZO23Lhpl5MkmzTg9dSLcyMjtbDdexCvAM/Q54ElqOSyW9vh3Vng0RwFVKaslCaxVoLQEPlHe4= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1728158883074356.5856373814454; Sat, 5 Oct 2024 13:08:03 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sxB2W-0006Gz-Rc; Sat, 05 Oct 2024 16:06:08 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sxB2U-0006Ez-Nd for qemu-devel@nongnu.org; Sat, 05 Oct 2024 16:06:06 -0400 Received: from mail-pl1-x636.google.com ([2607:f8b0:4864:20::636]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sxB2S-0001hr-0H for qemu-devel@nongnu.org; Sat, 05 Oct 2024 16:06:06 -0400 Received: by mail-pl1-x636.google.com with SMTP id d9443c01a7336-20b58f2e1f4so21812115ad.2 for ; Sat, 05 Oct 2024 13:06:03 -0700 (PDT) Received: from stoup.. (174-21-81-121.tukw.qwest.net. [174.21.81.121]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20c13931055sm16493405ad.139.2024.10.05.13.06.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Oct 2024 13:06:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1728158763; x=1728763563; 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=Qpc+gtvz4QF2D7U7hwk6I/PwDTmOhNNc5A8A2G2CqV8=; b=J7ETou96MJsubgZ7bZXJ1Lpb2hWHSpxbRLjFp2u1d+wjN5yvudDHCgKssjd2UKt6Kl Mk3Ltpy1k9tWHj9KzZocGvPWT6Gdx732waYHFLHGPjdG22sP9zo2nF/DkuLAVN5KeZLa SIZFPwDhiEQwqt8GxnKFAh9kOR3dKbIjZyxA3G2j+1f+VciBOm4lqfYLe2Ug6p4JV/jN UApNsZXFs3KiIli88gNk0U1SwZpI6mXfXexRQwea2pULDHSjpZRnaiY5n0O6hVpw7CLF nKsH2yXvBjsZkdeWwaD1zWpR8jE0WeGeJaG5L5YmfyjtY/mqrDc8GjQU5uxRx5LCRcKq huAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728158763; x=1728763563; 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=Qpc+gtvz4QF2D7U7hwk6I/PwDTmOhNNc5A8A2G2CqV8=; b=sy752RxiRO4zcick0KA55F/ygDBpdLm8lVPm3i0iT2D+qtXFjNzuDqrxdxRVSoKOif McIWheIjeAXHWep4J3g3fnMPu3PVlTkNz29wXUfras3mIrtkCGj5/WNxG91A5sx79cXL yhYtktEUeq/yewMoDhYF7MA7Nv+Fi2tljbgZyV92eWs42bEMC8qbl/pDqciuUq2cbOtn +CW4uvrDwbrAsEHNs/1f5l8bsdCGDeJOianaPxVQqSu3BJmjF3RoML8xMosTWjSIKKP3 uvekFn7Py/ZH6cFUSTpg/0xF586c+4n9vX31V3mtGWWFu/7ivhGC7UqiA8t+csaJI+yx Zt5A== X-Gm-Message-State: AOJu0YxLyq5CJ2LcGF0GC3etB3Bu5V80lQuwFKqjq7d4ibd/3x6wd4rt gQcMoJ9rfja3NWYgOdtUAtV9InfW8eLxH1YYkcxexby2FFt5+kERoSwad5tJ5O2CyUXgVbGCgFz O X-Google-Smtp-Source: AGHT+IFmM8Oxp421B76h4UpAzO5VbLx+wqOrR4XfQnLhl5uTco5sEvRm26Oyl1URtBb3k58uPkW8Hg== X-Received: by 2002:a17:902:f545:b0:20b:a576:1896 with SMTP id d9443c01a7336-20bff190668mr89398765ad.43.1728158762695; Sat, 05 Oct 2024 13:06:02 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: deller@kernel.org, peter.maydell@linaro.org, alex.bennee@linaro.org, linux-parisc@vger.kernel.org, qemu-arm@nongnu.org Subject: [PATCH v2 01/21] accel/tcg: Assert noreturn from write-only page for atomics Date: Sat, 5 Oct 2024 13:05:40 -0700 Message-ID: <20241005200600.493604-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241005200600.493604-1-richard.henderson@linaro.org> References: <20241005200600.493604-1-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::636; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x636.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: 1728158883532116600 Content-Type: text/plain; charset="utf-8" There should be no "just in case"; the page is already in the tlb, and known to be not readable. Signed-off-by: Richard Henderson Reviewed-by: Helge Deller Reviewed-by: Peter Maydell --- accel/tcg/cputlb.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index 117b516739..fd6459b695 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -1852,10 +1852,9 @@ static void *atomic_mmu_lookup(CPUState *cpu, vaddr = addr, MemOpIdx oi, /* * Since we don't support reads and writes to different * addresses, and we do have the proper page loaded for - * write, this shouldn't ever return. But just in case, - * handle via stop-the-world. + * write, this shouldn't ever return. */ - goto stop_the_world; + g_assert_not_reached(); } /* Collect tlb flags for read. */ tlb_addr |=3D tlbe->addr_read; --=20 2.43.0