From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-out.m-online.net (mail-out.m-online.net [212.18.0.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 373A71DDC28; Sat, 30 May 2026 21:47:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.18.0.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780177664; cv=none; b=S2ckr14zSSB7IP7HqlF9OL0moO/FKowVuozraSZFb6k/THZx1FQZnj0DLrseID85BW8Xd/T8GqvrowDZJPXl+XPxBdPW2tMFwUxanm0985nphFTrOTQHxXaxD5gpk5KjflBeFKbFynIUcQVYuUvkdvsfmOw9TMMIQ5TfgoX7grM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780177664; c=relaxed/simple; bh=+OdWi9WDtXgTepnQhKQYQwYgI4l6P+St845J3qNXsrI=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=IzdtKsYHVIb1LVDs3WUkSXlt/SH9znPUGDLcePOjBARQBDdI8EjPdVj8fVbairI64MtbvSbbiSdmkJEqtkME2HAKJbcPy1yqA99DuxPPqgKaC9g0wLlY+mzArTUmziu88BiOg1PaPFhN9aITErLvi1dBdOHRbMXIF8NPn+kodGQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=linux-m68k.org; spf=pass smtp.mailfrom=nefkom.net; arc=none smtp.client-ip=212.18.0.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=linux-m68k.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=nefkom.net Received: from mail-out.m-online.net (mail-out.m-online.net [212.18.0.10]) by mail-out.m-online.net (Postfix) with ESMTP id 4gSYjk41jXz1sG8Z; Sat, 30 May 2026 23:47:38 +0200 (CEST) Received: from frontend03.mail.m-online.net (unknown [192.168.6.182]) by mail-out.m-online.net (Postfix) with ESMTP id 4gSYjj4CZvz1sG7h; Sat, 30 May 2026 23:47:37 +0200 (CEST) Received: from localhost (dynscan3.mnet-online.de [192.168.6.87]) by mail.m-online.net (Postfix) with ESMTP id 4gSYjj2cFzz1qqlS; Sat, 30 May 2026 23:47:37 +0200 (CEST) X-Virus-Scanned: amavis at mnet-online.de Received: from mail.mnet-online.de ([192.168.6.182]) by localhost (dynscan3.mail.m-online.net [192.168.6.87]) (amavis, port 10024) with ESMTP id jhAAUe4_r901; Sat, 30 May 2026 23:47:36 +0200 (CEST) X-Auth-Info: VhoZGXqafEl8xd2Vn3898hxCrPZhtM4EMxNmVIF69poad4TwEdSE9C4PLgF6bHrY Received: from igel.home (aftr-82-135-83-65.dynamic.mnet-online.de [82.135.83.65]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Sat, 30 May 2026 23:47:36 +0200 (CEST) Received: by igel.home (Postfix, from userid 1000) id 42A002C16CE; Sat, 30 May 2026 23:47:36 +0200 (CEST) From: Andreas Schwab To: Deepak Gupta Cc: Deepak Gupta via B4 Relay , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Lorenzo Stoakes , Paul Walmsley , Palmer Dabbelt , Albert Ou , Conor Dooley , Rob Herring , Krzysztof Kozlowski , Arnd Bergmann , Christian Brauner , Peter Zijlstra , Oleg Nesterov , Eric Biederman , Kees Cook , Jonathan Corbet , Shuah Khan , Jann Horn , Conor Dooley , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?Q?Bj=C3=B6?= =?utf-8?Q?rn?= Roy Baron , Andreas Hindborg , Alice Ryhl , Trevor Gross , Benno Lossin , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, alistair.francis@wdc.com, richard.henderson@linaro.org, jim.shu@sifive.com, andybnac@gmail.com, kito.cheng@sifive.com, charlie@rivosinc.com, atishp@rivosinc.com, evan@rivosinc.com, cleger@rivosinc.com, alexghiti@rivosinc.com, samitolvanen@google.com, broonie@kernel.org, rick.p.edgecombe@intel.com, rust-for-linux@vger.kernel.org, Zong Li Subject: Re: [PATCH v23 06/28] riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE In-Reply-To: (Deepak Gupta's message of "Sat, 30 May 2026 12:40:33 -0700") References: <20251112-v5_user_cfi_series-v23-0-b55691eacf4f@rivosinc.com> <20251112-v5_user_cfi_series-v23-6-b55691eacf4f@rivosinc.com> <87jyslndo4.fsf@igel.home> Date: Sat, 30 May 2026 23:47:36 +0200 Message-ID: <875x44o9hj.fsf@igel.home> User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Mai 30 2026, Deepak Gupta wrote: > I see two ways forward: > > - It can be done in generic way where incoming PROT_WRITE means > PROT_READ | PROT_WRITE irrespective of RISC-V. Although others > (x86, arm, etc) would have to weigh in. > > OR > > - mmap04 LTP test can be updated to expect either of "rw-p" or "-w-p" > whenever only PROT_WRITE was specified. OR - Add a new PROT_ flag. -- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."