From patchwork Thu Jun 29 08:28:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Conor Dooley X-Patchwork-Id: 697774 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 07D0BEB64DD for ; Thu, 29 Jun 2023 08:30:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232041AbjF2Iar (ORCPT ); Thu, 29 Jun 2023 04:30:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48990 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232646AbjF2IaW (ORCPT ); Thu, 29 Jun 2023 04:30:22 -0400 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8D5D132; Thu, 29 Jun 2023 01:30:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1688027411; x=1719563411; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=r0ERhmqbd2oRPwjcE5btDtDW/JjDE/JzZQK8UiDqJyo=; b=ledMLAo8TwYyWqkFfwWaLfpSDiGwyBeUZb6xwWTHuEsnPKg0TAPAoDOB O9q8ms86rVV2SfXJR0+87zb+eW6slkh2qCPRfLNoGlFWsRnK5yejMV7B3 bKI6X44kd3gMx61tFPyb+KOJet2Y7VsaIrabYL1KR6wTYYOeMZGkD9AR9 NcJTuVldAXaROh8VGPsCPqbnJg5ZgtigmROK1YEwH6qwAm3vLRh/yff6Z VUI4bQUxIvUp8s3wQJdiaBsADQ0Tcji1uS3VYOveFHUvYLBgeBJMYV7rO 1b6wiYGg7WxRKwcbzLlxXrg18NpN8zB7B9bUt76DvxKLy1wEwK/gWaXLM g==; X-IronPort-AV: E=Sophos;i="6.01,168,1684825200"; d="scan'208";a="159104698" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 29 Jun 2023 01:30:10 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.21; Thu, 29 Jun 2023 01:30:03 -0700 Received: from wendy.microchip.com (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.2507.21 via Frontend Transport; Thu, 29 Jun 2023 01:30:01 -0700 From: Conor Dooley To: CC: , , Rob Herring , Krzysztof Kozlowski , Paul Walmsley , Albert Ou , Andrew Jones , Heiko Stuebner , "Evan Green" , Sunil V L , , , Subject: [PATCH v2 06/10] RISC-V: add single letter extensions to riscv_isa_ext Date: Thu, 29 Jun 2023 09:28:52 +0100 Message-ID: <20230629-uprising-harbor-439b85492132@wendy> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230629-rebuttal-vagueness-a699deb7c7b3@wendy> References: <20230629-rebuttal-vagueness-a699deb7c7b3@wendy> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3714; i=conor.dooley@microchip.com; h=from:subject:message-id; bh=r0ERhmqbd2oRPwjcE5btDtDW/JjDE/JzZQK8UiDqJyo=; b=owGbwMvMwCFWscWwfUFT0iXG02pJDClzHQ7xqHjnlcbxGS1mNHGsavkiMGXzdyGv342hJZpPbLwO +TZ2lLIwiHEwyIopsiTe7muRWv/HZYdzz1uYOaxMIEMYuDgFYCJH/jP8j799dseFzfKbHPo4S24uXy Q71XbZyxy/xGq7rQ8rD/6f/5zhv0fF1gXfb5bt7bQIi3fIeDDnwq+AZx2WM/nr1yyMerk5iRkA X-Developer-Key: i=conor.dooley@microchip.com; a=openpgp; fpr=F9ECA03CF54F12CD01F1655722E2C55B37CF380C Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org So that riscv_fill_hwcap() can use riscv_isa_ext to probe for single letter extensions, add them to it. As a result, what gets spat out in /proc/cpuinfo will become borked, as single letter extensions will be printed as part of the base extensions and while printing from riscv_isa_arr. Take the opportunity to unify the printing of the isa string, using the new member of riscv_isa_ext_data in the process. Reviewed-by: Andrew Jones Signed-off-by: Conor Dooley Reviewed-by: Evan Green --- Changes in v2: - Drop the multi_letter member, in exchange for calling strnlen() in two places. --- arch/riscv/kernel/cpu.c | 37 ++++++++++------------------------ arch/riscv/kernel/cpufeature.c | 13 ++++++++++++ 2 files changed, 24 insertions(+), 26 deletions(-) diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c index c89abf8ef6de..d0dfd88221df 100644 --- a/arch/riscv/kernel/cpu.c +++ b/arch/riscv/kernel/cpu.c @@ -160,41 +160,26 @@ arch_initcall(riscv_cpuinfo_init); #ifdef CONFIG_PROC_FS -static void print_isa_ext(struct seq_file *f) -{ - for (int i = 0; i < riscv_isa_ext_count; i++) { - const struct riscv_isa_ext_data *edata = &riscv_isa_ext[i]; - if (!__riscv_isa_extension_available(NULL, edata->id)) - continue; - - seq_printf(f, "_%s", edata->name); - } -} - -/* - * These are the only valid base (single letter) ISA extensions as per the spec. - * It also specifies the canonical order in which it appears in the spec. - * Some of the extension may just be a place holder for now (B, K, P, J). - * This should be updated once corresponding extensions are ratified. - */ -static const char base_riscv_exts[13] = "imafdqcbkjpvh"; - static void print_isa(struct seq_file *f) { - int i; - seq_puts(f, "isa\t\t: "); + if (IS_ENABLED(CONFIG_32BIT)) seq_write(f, "rv32", 4); else seq_write(f, "rv64", 4); - for (i = 0; i < sizeof(base_riscv_exts); i++) { - if (__riscv_isa_extension_available(NULL, base_riscv_exts[i] - 'a')) - /* Print only enabled the base ISA extensions */ - seq_write(f, &base_riscv_exts[i], 1); + for (int i = 0; i < riscv_isa_ext_count; i++) { + if (!__riscv_isa_extension_available(NULL, riscv_isa_ext[i].id)) + continue; + + /* Only multi-letter extensions are split by underscores */ + if (strnlen(riscv_isa_ext[i].name, 2) != 1) + seq_puts(f, "_"); + + seq_printf(f, "%s", riscv_isa_ext[i].name); } - print_isa_ext(f); + seq_puts(f, "\n"); } diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 6d8cd45af723..bf7e8e8852f0 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -144,6 +144,19 @@ static bool riscv_isa_extension_check(int id) * New entries to this struct should follow the ordering rules described above. */ const struct riscv_isa_ext_data riscv_isa_ext[] = { + __RISCV_ISA_EXT_DATA(i, RISCV_ISA_EXT_i), + __RISCV_ISA_EXT_DATA(m, RISCV_ISA_EXT_m), + __RISCV_ISA_EXT_DATA(a, RISCV_ISA_EXT_a), + __RISCV_ISA_EXT_DATA(f, RISCV_ISA_EXT_f), + __RISCV_ISA_EXT_DATA(d, RISCV_ISA_EXT_d), + __RISCV_ISA_EXT_DATA(q, RISCV_ISA_EXT_q), + __RISCV_ISA_EXT_DATA(c, RISCV_ISA_EXT_c), + __RISCV_ISA_EXT_DATA(b, RISCV_ISA_EXT_b), + __RISCV_ISA_EXT_DATA(k, RISCV_ISA_EXT_k), + __RISCV_ISA_EXT_DATA(j, RISCV_ISA_EXT_j), + __RISCV_ISA_EXT_DATA(p, RISCV_ISA_EXT_p), + __RISCV_ISA_EXT_DATA(v, RISCV_ISA_EXT_v), + __RISCV_ISA_EXT_DATA(h, RISCV_ISA_EXT_h), __RISCV_ISA_EXT_DATA(zicbom, RISCV_ISA_EXT_ZICBOM), __RISCV_ISA_EXT_DATA(zicboz, RISCV_ISA_EXT_ZICBOZ), __RISCV_ISA_EXT_DATA(zicntr, RISCV_ISA_EXT_ZICNTR),