From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 C3D6115B102 for ; Wed, 11 Jun 2025 15:17:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749655074; cv=none; b=aj0ywMCQxTfocCHm777KIk8t070TM/WcpI1I02WKUSBPQTdG3e1Ft6469Efogryh6dNEsGxxDyhstGbV2gq7HBRDeJ0zGWacjEf2SXOWs7vXLcMVkrP/3cUu6gFpVdrr9eZMEV/KLODoAdp56/9ASsVenBvFJM0aMaPal1pkWr8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749655074; c=relaxed/simple; bh=pISuPZ/rLeO+ucFOnpV+865WIgZW7FO2QJjKNsuPTpw=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=a9HSonrDwjV/t6CWLe3JWsbvfdalPgwxKIPJZTFvEHqxDeb6pDXnkRVt9OMoORy+g61NY3hz1gLDnCBQh2EksvykPYuQ6x+Nj9YiqZSfLHdV4uaj4GQ22CzzgWWM+nS34ic97pXEF92OdRajTgYoxYpjZXaAuURGtIOZ6IVj//E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cJ00GAqd; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="cJ00GAqd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 439ACC4CEE3; Wed, 11 Jun 2025 15:17:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1749655074; bh=pISuPZ/rLeO+ucFOnpV+865WIgZW7FO2QJjKNsuPTpw=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=cJ00GAqdTybtpxiodt7b5cCHV/9IOOSav4xq9+UClyaszbGGPQgzJ7Fw0h3SeDvVN N1ty/zQ5g2l4Do0DvX6a1j+sV+eujAdc5yz3TX3oLMGuTIrFFsS1sL5ncO6ffHEGgD 5EBZTHIeviD+mJP5xyDQV3rwpUYgsTy6NpQ0soiR/BBbqxMDz4i+jfd5zI/Dw5bTxq 8fsLn9Xu/g7mwhr4Jg1sPpQJrDlSQnQE7Tu7xFvGRkapsirr7vHl2sKWXK76DXIRbo ZwYEvrNWDGZfYTnIeh8AOsILBuLm2z1AMY08Qq1TRGDe9IKGpcYpmkWSk6G7lHZrPV gq6qNn/CQHb7Q== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1uPND5-005uoG-PL; Wed, 11 Jun 2025 16:17:51 +0100 Date: Wed, 11 Jun 2025 16:17:51 +0100 Message-ID: <86zfeecnog.wl-maz@kernel.org> From: Marc Zyngier To: Yeoreum Yun Cc: catalin.marinas@arm.com, will@kernel.org, broonie@kernel.org, oliver.upton@linux.dev, ardb@kernel.org, frederic@kernel.org, james.morse@arm.com, joey.gouly@arm.com, scott@os.amperecomputing.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/6] arm64/Kconfig: add LSUI Kconfig In-Reply-To: <20250611104916.10636-3-yeoreum.yun@arm.com> References: <20250611104916.10636-1-yeoreum.yun@arm.com> <20250611104916.10636-3-yeoreum.yun@arm.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: yeoreum.yun@arm.com, catalin.marinas@arm.com, will@kernel.org, broonie@kernel.org, oliver.upton@linux.dev, ardb@kernel.org, frederic@kernel.org, james.morse@arm.com, joey.gouly@arm.com, scott@os.amperecomputing.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Wed, 11 Jun 2025 11:49:12 +0100, Yeoreum Yun wrote: > > Since Armv9.6, FEAT_LSUI supplies the load/store instructions for > previleged level to access to access user memory without clearing > PSTATE.PAN bit. > It's enough to add CONFIG_AS_HAS_LSUI only because the code for LUSI uses > indiviual `.arch_extension` entries. > > Signed-off-by: Yeoreum Yun > --- > arch/arm64/Kconfig | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 55fc331af337..20f360eef2ac 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -2237,6 +2237,13 @@ config ARM64_GCS > > endmenu # "v9.4 architectural features" > > +menu "v9.6 architectural features" > + > +config AS_HAS_LSUI > + def_bool $(as-instr,.arch_extension lsui) > + > +endmenu # "v9.6 architectural features" > + > config ARM64_SVE > bool "ARM Scalable Vector Extension support" > default y > @@ -2498,4 +2505,3 @@ endmenu # "CPU Power Management" > source "drivers/acpi/Kconfig" > > source "arch/arm64/kvm/Kconfig" > - Can you please document what toolchain versions have support for this? Thanks, M. -- Without deviation from the norm, progress is not possible.