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 7B09D19EED3
	for <linux-kernel@vger.kernel.org>; Wed, 25 Feb 2026 08:08:48 +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=1772006930; cv=none; b=OV0488Jv8JCC+BstLZMK5rmjwD4TDpQ5+VxQY2vJCQCHo1njnOHo6SVWxR16FR9he95Y6EKIsbTQt7iMr34alqILzSyJt1DmDv0f9JCN7fACyOsaUroi1nI9/A2nJ/yT7PSmHXwGyPOdbbRMZwFsYLC3hCTZG8hYFrzeIJlX3TM=
ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org;
	s=arc-20240116; t=1772006930; c=relaxed/simple;
	bh=X4e0VinX4vVWC1wSSsomMDZWENzAhvVW+I08eRX5tag=;
	h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version:
	 Content-Type:Content-Disposition:In-Reply-To; b=FJs3octVFXi7HPqMb+gh05n97ZS+S9Y052PniabldPxdo8164N3rD1Nf6G7iYV03cJpAgpAZ+xUyN+2iua06IrTN64XSwQ4XWXeVQyixheNM92X0GZiMH5MZzPruj7aMxScH1Qu2jpVGlLcPd9ngV+4PsT5v1ASlFldowoipKwc=
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; 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
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 E0A4A165C;
	Wed, 25 Feb 2026 00:08:40 -0800 (PST)
Received: from arm.com (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19])
	by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id CDAFD3F59E;
	Wed, 25 Feb 2026 00:08:43 -0800 (PST)
Date: Wed, 25 Feb 2026 08:08:41 +0000
From: Catalin Marinas <catalin.marinas@arm.com>
To: Deepak Gupta <debug@rivosinc.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	David Hildenbrand <david@kernel.org>,
	Mark Brown <broonie@kernel.org>,
	Rick Edgecombe <rick.p.edgecombe@intel.com>,
	Will Deacon <will@kernel.org>, Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>, Alexandre Ghiti <alex@ghiti.fr>,
	Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
	Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Kito Cheng <kito.cheng@sifive.com>,
	Jesse Huang <jesse.huang@sifive.com>,
	valentin.haudiquet@canonical.com, heinrich.schuchardt@canonical.com,
	linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
	linux-riscv@lists.infradead.org, linux-mm@kvack.org
Subject: Re: [PATCH 0/5] mm: arch/shstk: Common shadow stack mapping helper
 and VM_NOHUGEPAGE
Message-ID: <aZ6uCceePh73wcMP@arm.com>
References: <20260224175800.2500729-1-catalin.marinas@arm.com>
 <aZ489QDHxEZfLydn@debug.ba.rivosinc.com>
Precedence: bulk
X-Mailing-List: linux-kernel@vger.kernel.org
List-Id: <linux-kernel.vger.kernel.org>
List-Subscribe: <mailto:linux-kernel+subscribe@vger.kernel.org>
List-Unsubscribe: <mailto:linux-kernel+unsubscribe@vger.kernel.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <aZ489QDHxEZfLydn@debug.ba.rivosinc.com>

Hi Deepak,

On Tue, Feb 24, 2026 at 04:06:13PM -0800, Deepak Gupta wrote:
> On Tue, Feb 24, 2026 at 05:57:52PM +0000, Catalin Marinas wrote:
> > arm64, riscv and x86 all implement shadow stack support and use a
> > similar pattern for mapping the user shadow stack (originally cloned
> > from x86). Extract this common pattern into a shared helper -
> > vm_mmap_shadow_stack().
[...]
> FWIW, I applied your patches on v7.0-rc1 and risc-v cfi kselftest passes
[...]
> So you can tag tested by for risc-v.

That's great, thanks!

-- 
Catalin