From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 3E9E94756B1; Thu, 24 Sep 2026 12:23:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790252618; cv=none; b=KIq1go0s73J/URiT4ZUNnK+KmeX/TMC1OJAmwqyITJoX9dXjdL62o+EBAznQAMJ2uwlWTA+a8b3YSB9TO4PM/Kqhd+2bL+Ktk4sV6BR2wukUoSZSRxXAM1JB3ZgLM/ruUGSP5zoLu8iKwitKgJXJM15haXInRxC0O5AWedHUu2M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790252618; c=relaxed/simple; bh=vNFe6jSuDfebOXCmwmWjYhSTK+XatMTN9IVuzrYWanA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=DLXQDFsS1BdTdbA0Lnvbde17h3mAkm2p/0V0uwoHy92PjxaY1K0ZmpuIPVFBC+vFpK6VEIJqVKJpg9EqUZpJ7MgW2SNCC6fhGI0SIc2v9k/L3yHTyzq7CQPXqQF7bIjMZD/gRn0Fw3ZO80amKhHXUdThd5E3T+qMEvpmkBXR7eY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=CjAMiE95; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="CjAMiE95" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id EB5CA152B; Thu, 24 Sep 2026 05:23:32 -0700 (PDT) Received: from [10.57.83.110] (unknown [10.57.83.110]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 18B033F86C; Thu, 24 Sep 2026 05:23:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1790252616; bh=vNFe6jSuDfebOXCmwmWjYhSTK+XatMTN9IVuzrYWanA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=CjAMiE950CD1likYhHHG2G4IDbslsFxD3Qsg7M0c/rEsrgq0shMN5wyePSHulDU5w ntAkjL3I4uXuHGdNdSZtQIh7Vvcbnn+grI4a/YnTyOemiulO6PNQz2yAZroktlQqkM rzbMuwv+8zjiPVV8HIZ6jKyW0OBl55PjEDIZxndo= Message-ID: <27c9b227-9dae-4263-be10-2c6089f8f425@arm.com> Date: Thu, 24 Sep 2026 13:23:30 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 4/6] arm64: use hw_pte_t for fixmap HW PTEs To: Muhammad Usama Anjum , Catalin Marinas , Will Deacon , Mark Rutland , Ard Biesheuvel , Ilias Apalodimas , Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org References: <20260922-pte0_arm-v2-0-a3f1ddff0a8a@arm.com> <20260922-pte0_arm-v2-4-a3f1ddff0a8a@arm.com> From: Ryan Roberts Content-Language: en-GB In-Reply-To: <20260922-pte0_arm-v2-4-a3f1ddff0a8a@arm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 22/09/2026 18:31, Muhammad Usama Anjum wrote: > fixmap_pte() returns a pointer into bm_pte, and early_fixmap_init_pte() > installs those arrays as page tables. Their elements are therefore > HW PTEs. > > Change the element type of bm_pte to hw_pte_t so it matches the HW PTE > pointers returned and passed to the accessors. This is needed before > ARCH_HAS_HW_PTE_T makes HW PTEs and SW PTE values distinct types; the > array dimensions and placement are unchanged. > > Signed-off-by: Muhammad Usama Anjum Reviewed-by: Ryan Roberts > --- > arch/arm64/mm/fixmap.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/mm/fixmap.c b/arch/arm64/mm/fixmap.c > index 237a9136bc73b..709a97fe327d8 100644 > --- a/arch/arm64/mm/fixmap.c > +++ b/arch/arm64/mm/fixmap.c > @@ -31,7 +31,7 @@ static_assert(NR_BM_PMD_TABLES == 1); > > #define BM_PTE_TABLE_IDX(addr) __BM_TABLE_IDX(addr, PMD_SHIFT) > > -static pte_t bm_pte[NR_BM_PTE_TABLES][PTRS_PER_PTE] __bss_pgtbl; > +static hw_pte_t bm_pte[NR_BM_PTE_TABLES][PTRS_PER_PTE] __bss_pgtbl; > static pmd_t bm_pmd[PTRS_PER_PMD] __bss_pgtbl __maybe_unused; > static pud_t bm_pud[PTRS_PER_PUD] __bss_pgtbl __maybe_unused; > >