From patchwork Mon Jan 4 19:58:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Ghiti X-Patchwork-Id: 11997537 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9F282C433E0 for ; Mon, 4 Jan 2021 20:09:49 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 38A5921BE5 for ; Mon, 4 Jan 2021 20:09:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 38A5921BE5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ghiti.fr Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=IsH7NTpSZV36dKE4IoBU5UL4e90Zqz9lL5OPQldN+cQ=; b=G26dl0JzVtJM6urmpSqHz/h6c ck/WHpJgxgaaFBEO3mPsKBkRYwLEVeWaILQz0t2zW+JXiSCeg/Mnkt/EEW/R8Rg5BMj0Uy8i5Lp4v aK7t6NNNNwkLpGP38Rz7GkRtEo/mjWJDtdlb4MfKOiYSmfBpITlYG52SXxV4giFGGdLDZ57xlF7Sv 2prMrbDVayrwH4ScWmUc5VwDz3RVEWyOQuNJEPdsgruQgZFKOBJavQEgcjHB4y3kX35/JISGJykPY FoIbvVXRoGCa8HYnbTk2Nmb9Gi4FDOE5ePG6FsgXiAuHi+r1U7eSnYZAcRrwGAsHj5/S8//aIbLht 2Yz8b9s3Q==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kwWAT-0000Rc-Fo; Mon, 04 Jan 2021 20:09:29 +0000 Received: from relay8-d.mail.gandi.net ([217.70.183.201]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kwWAQ-0000RB-QT for linux-riscv@lists.infradead.org; Mon, 04 Jan 2021 20:09:27 +0000 X-Originating-IP: 90.112.190.212 Received: from debian.home (lfbn-gre-1-231-212.w90-112.abo.wanadoo.fr [90.112.190.212]) (Authenticated sender: alex@ghiti.fr) by relay8-d.mail.gandi.net (Postfix) with ESMTPSA id 8C6BB1BF204; Mon, 4 Jan 2021 20:09:22 +0000 (UTC) From: Alexandre Ghiti To: Paul Walmsley , Palmer Dabbelt , Zong Li , Anup Patel , Christoph Hellwig , Ard Biesheuvel , Arnd Bergmann , linux-efi@vger.kernel.org, linux-arch@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 10/12] riscv: Use pgtable_l4_enabled to output mmu type in cpuinfo Date: Mon, 4 Jan 2021 14:58:38 -0500 Message-Id: <20210104195840.1593-11-alex@ghiti.fr> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210104195840.1593-1-alex@ghiti.fr> References: <20210104195840.1593-1-alex@ghiti.fr> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210104_150926_976047_AA0814FD X-CRM114-Status: GOOD ( 13.84 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Palmer Dabbelt , Alexandre Ghiti Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Now that the mmu type is determined at runtime using SATP characteristic, use the global variable pgtable_l4_enabled to output mmu type of the processor through /proc/cpuinfo instead of relying on device tree infos. Signed-off-by: Alexandre Ghiti Reviewed-by: Anup Patel Reviewed-by: Palmer Dabbelt --- arch/riscv/include/asm/pgtable.h | 1 + arch/riscv/kernel/cpu.c | 23 ++++++++++++----------- 2 files changed, 13 insertions(+), 11 deletions(-) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index dd27d28f1d9e..95721016049d 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -495,6 +495,7 @@ extern char _start[]; extern void *dtb_early_va; extern uintptr_t dtb_early_pa; extern u64 satp_mode; +extern bool pgtable_l4_enabled; void setup_bootmem(void); void paging_init(void); diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c index 6d59e6906fdd..dea9b1c31889 100644 --- a/arch/riscv/kernel/cpu.c +++ b/arch/riscv/kernel/cpu.c @@ -7,6 +7,7 @@ #include #include #include +#include /* * Returns the hart ID of the given device tree node, or -ENODEV if the node @@ -70,18 +71,19 @@ static void print_isa(struct seq_file *f, const char *isa) seq_puts(f, "\n"); } -static void print_mmu(struct seq_file *f, const char *mmu_type) +static void print_mmu(struct seq_file *f) { + char sv_type[16]; + #if defined(CONFIG_32BIT) - if (strcmp(mmu_type, "riscv,sv32") != 0) - return; + strncpy(sv_type, "sv32", 5); #elif defined(CONFIG_64BIT) - if (strcmp(mmu_type, "riscv,sv39") != 0 && - strcmp(mmu_type, "riscv,sv48") != 0) - return; + if (pgtable_l4_enabled) + strncpy(sv_type, "sv48", 5); + else + strncpy(sv_type, "sv39", 5); #endif - - seq_printf(f, "mmu\t\t: %s\n", mmu_type+6); + seq_printf(f, "mmu\t\t: %s\n", sv_type); } static void *c_start(struct seq_file *m, loff_t *pos) @@ -106,14 +108,13 @@ static int c_show(struct seq_file *m, void *v) { unsigned long cpu_id = (unsigned long)v - 1; struct device_node *node = of_get_cpu_node(cpu_id, NULL); - const char *compat, *isa, *mmu; + const char *compat, *isa; seq_printf(m, "processor\t: %lu\n", cpu_id); seq_printf(m, "hart\t\t: %lu\n", cpuid_to_hartid_map(cpu_id)); if (!of_property_read_string(node, "riscv,isa", &isa)) print_isa(m, isa); - if (!of_property_read_string(node, "mmu-type", &mmu)) - print_mmu(m, mmu); + print_mmu(m); if (!of_property_read_string(node, "compatible", &compat) && strcmp(compat, "riscv")) seq_printf(m, "uarch\t\t: %s\n", compat);