From patchwork Mon Nov 12 09:46:43 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chao Fan X-Patchwork-Id: 10678385 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F367914BA for ; Mon, 12 Nov 2018 09:48:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DAAF9298CD for ; Mon, 12 Nov 2018 09:48:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C78C829703; Mon, 12 Nov 2018 09:48:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 56C6B28E72 for ; Mon, 12 Nov 2018 09:48:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728619AbeKLTkw (ORCPT ); Mon, 12 Nov 2018 14:40:52 -0500 Received: from mail.cn.fujitsu.com ([183.91.158.132]:26720 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725873AbeKLTka (ORCPT ); Mon, 12 Nov 2018 14:40:30 -0500 X-IronPort-AV: E=Sophos;i="5.43,368,1503331200"; d="scan'208";a="47945968" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 12 Nov 2018 17:48:01 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id C14E24B7348C; Mon, 12 Nov 2018 17:47:55 +0800 (CST) Received: from localhost.local (10.167.225.56) by G08CNEXCHPEKD01.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.408.0; Mon, 12 Nov 2018 17:48:01 +0800 From: Chao Fan To: , , , , , , , , , , CC: , , Subject: [PATCH v11 3/5] x86/boot: Add get_acpi_rsdp() to parse RSDP in cmdlien from kexec Date: Mon, 12 Nov 2018 17:46:43 +0800 Message-ID: <20181112094645.4879-4-fanc.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181112094645.4879-1-fanc.fnst@cn.fujitsu.com> References: <20181112094645.4879-1-fanc.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.225.56] X-yoursite-MailScanner-ID: C14E24B7348C.A81AF X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: fanc.fnst@cn.fujitsu.com Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Imitate setup_acpi_rsdp() for the early_param of 'acpi_rsdp'. KEXEC writes the RSDP pointer to cmdline for EFI booting. So if 'acpi_rsdp' found in cmdline, use it directely. Since function kstrtoull() is needed, include it in arch/x86/boot/string.h. To solve the definition conflict problem, set BOOT_STRING tag to expose only kstrtoull() and functions used by it. Other functions in lib/kstrtox.c will be covered. Signed-off-by: Chao Fan --- arch/x86/boot/compressed/acpitb.c | 26 ++++++++++++++++++++++++++ arch/x86/boot/string.h | 4 ++++ lib/kstrtox.c | 4 ++++ 3 files changed, 34 insertions(+) diff --git a/arch/x86/boot/compressed/acpitb.c b/arch/x86/boot/compressed/acpitb.c index 50fa65cf824d..5cfb4efa5a19 100644 --- a/arch/x86/boot/compressed/acpitb.c +++ b/arch/x86/boot/compressed/acpitb.c @@ -8,6 +8,12 @@ #include #include +#define STATIC +#include + +#define BOOT_STRING +#include "../string.h" + /* Search EFI table for RSDP table. */ static void efi_get_rsdp_addr(acpi_physical_address *rsdp_addr) { @@ -200,3 +206,23 @@ static void bios_get_rsdp_addr(acpi_physical_address *rsdp_addr) *rsdp_addr = (acpi_physical_address)address; } } + +static void get_acpi_rsdp(acpi_physical_address *rsdp_addr) +{ +#ifdef CONFIG_KEXEC + unsigned long long res; + int len = 0; + char *val; + + val = malloc(19); + len = cmdline_find_option("acpi_rsdp", val, 19); + + if (len == -1) + return; + + if (len > 0) { + val[len] = 0; + *rsdp_addr = (acpi_physical_address)kstrtoull(val, 16, &res); + } +#endif +} diff --git a/arch/x86/boot/string.h b/arch/x86/boot/string.h index 3d78e27077f4..0ff3edb888e4 100644 --- a/arch/x86/boot/string.h +++ b/arch/x86/boot/string.h @@ -30,3 +30,7 @@ extern unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base); #endif /* BOOT_STRING_H */ + +#ifdef BOOT_STRING +#include "../../../lib/kstrtox.c" +#endif diff --git a/lib/kstrtox.c b/lib/kstrtox.c index 1006bf70bf74..3804db9eed56 100644 --- a/lib/kstrtox.c +++ b/lib/kstrtox.c @@ -126,6 +126,8 @@ int kstrtoull(const char *s, unsigned int base, unsigned long long *res) } EXPORT_SYMBOL(kstrtoull); +#ifndef BOOT_STRING + /** * kstrtoll - convert a string to a long long * @s: The start of the string. The string must be null-terminated, and may also @@ -408,3 +410,5 @@ kstrto_from_user(kstrtou16_from_user, kstrtou16, u16); kstrto_from_user(kstrtos16_from_user, kstrtos16, s16); kstrto_from_user(kstrtou8_from_user, kstrtou8, u8); kstrto_from_user(kstrtos8_from_user, kstrtos8, s8); + +#endif