From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f74.google.com (mail-wm1-f74.google.com [209.85.128.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D8408340A46 for ; Mon, 27 Apr 2026 15:35:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777304138; cv=none; b=q2uYRepGgyhsNTlzsseSp+DXc0K5NXKg1YEnpZv4QZYL3dm9MaxEq8aaBvPa+nQIxmpRttQp4p5jTn7QkbTBHgnVlQ3Q/Qcsfsj8eNCn39AmBSEK1Nf0+aK+s6YUUsgTT+QlF3a5/jTQ9kkBAW8BlfWSDzFW/1rdiZaaz4cGtjQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777304138; c=relaxed/simple; bh=Sl0OBQBWIK0zh6lHXps5IqXvZm9y+3UkjWufXvijumM=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=Yt8DUYpmmGPPVNnEf8Uc3uQS2e/2RCgIy405Y2sfWDJwd/6xIeRfFaRQu/BJ6Bnwj11mXNLf289DS5EjN+W3PPDXwSAQPQm1CLDZibPMO5gEmZMtJMAIbVXVAoNR7YRbEx8IvVY071k5/DmBgd2T8Qx+6x18VUB/08LHT66RZu8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--ardb.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=NH+E9lRw; arc=none smtp.client-ip=209.85.128.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--ardb.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="NH+E9lRw" Received: by mail-wm1-f74.google.com with SMTP id 5b1f17b1804b1-488f973ddfeso76714545e9.3 for ; Mon, 27 Apr 2026 08:35:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777304135; x=1777908935; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=8F3kASMqf5BHYl2gzcA0DgWEOwzoo2uBq3thfdXqJMo=; b=NH+E9lRwKjOCEzgfYbeuSSQsUlncTtFpQ7d0aV59HERZvL67lDcVTFkLfgR2PEa6p7 irdw3W9Xi96W9FufSW0+7SYY/8H5UVcTTYROrkr0fToNQKOZUkaezDPHWgeYHGgpANFz z9V1apwiDDMnTFRtCRrVnp4oR+9JqYiw5WRLNiKs96ZLI2qJIcgwXWnJapyKLw4uzgZs tvynBFbqWKfJDscJgGEJS+E9RwVeGAu1b5pU3blf6hwj6OtNH3zfvU8KmPEJ5CjPG7qq qKzYyLYXY+sC60Qsm/BNDy+qPp52tHWbRkSEvS0Wp4EDknE1rn4w0BPt4Uak4M0FfhEA K6Ww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777304135; x=1777908935; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=8F3kASMqf5BHYl2gzcA0DgWEOwzoo2uBq3thfdXqJMo=; b=jZErYjjC44mykvH73Cvc8cWKf1vC2SR+8i84XBkXf4mKLr8KCEjAMS1vw5oHv6KNkl KcO8llUnlD2X03DfaxpUkaioRUVV/iVI+TNlWiufywG3ieVEFyvlkCVJK2kI5RN19Xv/ MqUOaccdsefO2uMO39giI8hOerPwZEJ08B04r5rhz9VOq82LtxRrCql29XA64cTFYwx/ bEzNw5+Be5dp4OXZrh0KyZEj5Qem+mJCnilLNz/Bv5cRBaQrJl02Qs/6SXg+lfv8Uui9 O6UFzjGCjkWnHhn4a4CTWSA+VOfRlSxuXJpe9AaSDj8jqXBp9K2GEvWTty07pI59Sfgu /fmQ== X-Gm-Message-State: AOJu0YzhBEJKHJREEnJizlrymUL4hz0Iz9Ttrcdv8B3kbi4VDJvDrIaw TJqm0+LnwTHR8vtDqi8FaMSbXohVH+UdCc+YM2r0bVL5nZOCMuLbKUG0dce/QsTSYESozbzA/w= = X-Received: from wmbh12.prod.google.com ([2002:a05:600c:a10c:b0:489:1946:b592]) (user=ardb job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:1e28:b0:483:7903:c3b1 with SMTP id 5b1f17b1804b1-488fb77fbf3mr626097515e9.20.1777304135240; Mon, 27 Apr 2026 08:35:35 -0700 (PDT) Date: Mon, 27 Apr 2026 17:34:18 +0200 In-Reply-To: <20260427153416.2103979-17-ardb+git@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260427153416.2103979-17-ardb+git@google.com> X-Developer-Key: i=ardb@kernel.org; a=openpgp; fpr=F43D03328115A198C90016883D200E9CA6329909 X-Developer-Signature: v=1; a=openpgp-sha256; l=837; i=ardb@kernel.org; h=from:subject; bh=FjvXC4Bvv/morAQPM0ElYAlwegkzMza4j/YwiIL/yF4=; b=owGbwMvMwCVmkMcZplerG8N4Wi2JIfN94++NX3ll/ZiXVZap93TO00rsSY3MY/ndJRGotvX3m Y9v23Q6SlkYxLgYZMUUWQRm/3238/REqVrnWbIwc1iZQIYwcHEKwEQu/mX4xXRjUvDxfwUKzSeC Qp+sfOS5rfhfFteH21tOH9i1KfXn+g6G/9lLOeQeqzgJu68KXXDhuUvujolfrnt0PsxjVi7vjpH 14gcA X-Mailer: git-send-email 2.54.0.rc2.544.gc7ae2d5bb8-goog Message-ID: <20260427153416.2103979-18-ardb+git@google.com> Subject: [PATCH v4 01/15] arm64: mm: Map the linear alias of text/rodata as tagged From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, will@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com, Ard Biesheuvel , Ryan Roberts , Anshuman Khandual , Liz Prucka , Seth Jenkins , Kees Cook , Mike Rapoport , David Hildenbrand , Andrew Morton , linux-mm@kvack.org, linux-hardening@vger.kernel.org Content-Type: text/plain; charset="UTF-8" From: Ard Biesheuvel Before moving the empty_zero_page into the __ro_after_init section, make sure it has the memory-tagged type. This is needed to ensure that cpu_enable_mte() will be able to initialize the tags correctly. Signed-off-by: Ard Biesheuvel --- arch/arm64/mm/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index dd85e093ffdb..f084993024ab 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1049,7 +1049,7 @@ void __init mark_linear_text_alias_ro(void) */ update_mapping_prot(__pa_symbol(_text), (unsigned long)lm_alias(_text), (unsigned long)__init_begin - (unsigned long)_text, - PAGE_KERNEL_RO); + pgprot_tagged(PAGE_KERNEL_RO)); } #ifdef CONFIG_KFENCE -- 2.54.0.rc2.544.gc7ae2d5bb8-goog