From patchwork Wed May 18 17:02:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiko Stuebner X-Patchwork-Id: 12853892 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id ABBA8C433EF for ; Wed, 18 May 2022 17:03:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=j5327kIjQOi3h37AHexLja/55L5gfjZr64V92eDEDLg=; b=rKxc/6JmpEKrQb JOzcrtWKmzfj4MN3q8OKJnu1wCpgyYEp6UfZRPeowUTsFPFfegDWkoQWKGmQOKt6NRwYpSNHFjBMV pa+tP1W10PQDbZHHNQa56IviKKkQSKnm24PIGaeP6tQieEkt1nhKYFMlUSRT/teMIGoYSO2lTjFIj SwE+Qo1NCPMQAYmaYA+Yg3fm5R3qCdIHF8ow92FElZGvZxrReZA98iBFOrf8ofFWDYbGnMj4RRSv2 MUaIDLAUYduOgnY3KC8GoJR8WeepATQVFopKE9RGXNZcR9deRjW53Utp86duMNwgiy0cO4aH9TT13 yRM5RrbJbBK4fywbzh7A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nrN4j-003ABU-MS; Wed, 18 May 2022 17:03:05 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nrN4h-003A9a-NH for linux-riscv@lists.infradead.org; Wed, 18 May 2022 17:03:04 +0000 Received: from ip5b412258.dynamic.kabel-deutschland.de ([91.65.34.88] helo=phil.lan) by gloria.sntech.de with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nrN4d-0001Pv-1b; Wed, 18 May 2022 19:02:59 +0200 From: Heiko Stuebner To: palmer@dabbelt.com, paul.walmsley@sifive.com Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, wefu@redhat.com, guoren@kernel.org, mick@ics.forth.gr, samuel@sholland.org, cmuellner@linux.com, philipp.tomsich@vrull.eu, hch@lst.de, Heiko Stuebner Subject: [PATCH 2/4] riscv: Improve description for RISCV_ISA_SVPBMT Kconfig symbol Date: Wed, 18 May 2022 19:02:52 +0200 Message-Id: <20220518170254.3178923-3-heiko@sntech.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220518170254.3178923-1-heiko@sntech.de> References: <20220518170254.3178923-1-heiko@sntech.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220518_100303_834934_A01B3302 X-CRM114-Status: GOOD ( 11.30 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org This improves the symbol's description to make it easier for people to understand what it is about. Suggested-by: Christoph Hellwig Suggested-by: Philipp Tomsich Signed-off-by: Heiko Stuebner --- arch/riscv/Kconfig | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 65285b980134..a4b299ad4473 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -356,8 +356,13 @@ config RISCV_ISA_SVPBMT select RISCV_ALTERNATIVE default y help - Adds support to dynamically detect the presence of the SVPBMT extension - (Supervisor-mode: page-based memory types) and enable its usage. + Adds support to dynamically detect the presence of the SVPBMT + ISA-extension (Supervisor-mode: page-based memory types) and + enable its usage. + + The memory type for a page contains a combination of attributes + that indicate the cacheability, idempotency, and ordering + properties for access to that page. The SVPBMT extension is only available on 64Bit cpus.