From mboxrd@z Thu Jan 1 00:00:00 1970 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 91C9CC433FE for ; Thu, 24 Mar 2022 11:26:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349708AbiCXL1d (ORCPT ); Thu, 24 Mar 2022 07:27:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41062 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236176AbiCXL1b (ORCPT ); Thu, 24 Mar 2022 07:27:31 -0400 Received: from mail-wm1-x330.google.com (mail-wm1-x330.google.com [IPv6:2a00:1450:4864:20::330]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EBE9EA66E7 for ; Thu, 24 Mar 2022 04:25:59 -0700 (PDT) Received: by mail-wm1-x330.google.com with SMTP id q20so2529338wmq.1 for ; Thu, 24 Mar 2022 04:25:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=uMSVKsWryqt3zeqnYjz8LXFCtuqxZELmkuw89oQvIBA=; b=RLVWby+BCQjf4bP21qjgEAspa60BBTvBjDK8vlIlNZKDGGYXufONeUshaSHNCTkxcL cwthikyIy9BOybxpqr2uyxDetL8asrUt/BfvQ+0cFDr4B//eKXfSFRzdtlq7SjEu5JuY i4MsqyPRGBVoXhcEe1Hat7ZxiIFDLGGwWaedFtrDlfmN7ZUOuf9RvOEmbGaCMBpG/+3K CjNLUKW/2Mdw06iIrahB2YB9J7UddvmCIDyyDhALm9u8Pwjt9alN9Nhpby8mMLSVs2NY 4yidt7zRQQo2kAzvC18XhDkNxl3JDFPX6kbHwn5pbiqVPRbaDsSs/37y/ne1qAiJwTtU MIRQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=uMSVKsWryqt3zeqnYjz8LXFCtuqxZELmkuw89oQvIBA=; b=v3w7vFs6BAuJYsj5hbCRJv3AQygcIV8sfNVMP626YvqGBjoZe/AVPq1r0A7mxTiKaZ Ig4JhmUuehsLouuXo9QddHOVy8iXfXKwPdNMbow40hksF8r+f+9HZQWgR8EXKeNF9+fA wdBfeOCbtCPoZFvOS1yLJdyhspU0VUX5GQHHdShNt26TpgfFplnB+M2lHeSZ6ErV9YU0 QI7QV4Kvw8Lf1USUUG2Kfemy5IZ0xPZ6TacCg7nneHGHOsKJmuUpvrySnVsiDdLLDUGH sk5LyvDJqQPT3KVWgItR+Pzdj8qjwKqQUPI9MYrwIwfP0GCEHrFFYCf9tjfoeCJpBPZV gMGQ== X-Gm-Message-State: AOAM5325DRkET65pOfWHzStxbMBx014upQFa2VKuN1cD+qAT+Cs6l9wS l3od3cf2bPiYLTH21jVJgW9oow== X-Google-Smtp-Source: ABdhPJxxSeuSOAZdxU/+Rqr9GkGi75FBqxzBrOgpiX7ZMlp1RTm4eO79f7FGS9r2qHc4u4GPQCCOQQ== X-Received: by 2002:a05:600c:5114:b0:38c:cb16:14d5 with SMTP id o20-20020a05600c511400b0038ccb1614d5mr4984948wms.169.1648121158508; Thu, 24 Mar 2022 04:25:58 -0700 (PDT) Received: from localhost.localdomain ([49.206.7.17]) by smtp.gmail.com with ESMTPSA id m3-20020a5d64a3000000b00203ed35b0aesm3875350wrp.108.2022.03.24.04.25.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Mar 2022 04:25:58 -0700 (PDT) From: Sunil V L To: Ard Biesheuvel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Ilias Apalodimas Cc: Heinrich Schuchardt , Atish Patra , Anup Patel , Jessica Clarke , Abner Chang , linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Sunil V L , Palmer Dabbelt Subject: [PATCH 1/1] riscv/efi_stub: Add support for RISCV_EFI_BOOT_PROTOCOL Date: Thu, 24 Mar 2022 16:55:34 +0530 Message-Id: <20220324112534.209959-2-sunilvl@ventanamicro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220324112534.209959-1-sunilvl@ventanamicro.com> References: <20220324112534.209959-1-sunilvl@ventanamicro.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds the support for getting the boot hart ID in Linux EFI stub using RISCV_EFI_BOOT_PROTOCOL. This protocol is preferred method over existing DT based solution since it works irrespective of DT or ACPI. The specification of the protocol is hosted at: https://github.com/riscv-non-isa/riscv-uefi Signed-off-by: Sunil V L Acked-by: Palmer Dabbelt --- drivers/firmware/efi/libstub/efistub.h | 7 ++++++ drivers/firmware/efi/libstub/riscv-stub.c | 29 +++++++++++++++++++---- include/linux/efi.h | 1 + 3 files changed, 32 insertions(+), 5 deletions(-) diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h index edb77b0621ea..aced62a0907e 100644 --- a/drivers/firmware/efi/libstub/efistub.h +++ b/drivers/firmware/efi/libstub/efistub.h @@ -720,6 +720,13 @@ union efi_tcg2_protocol { } mixed_mode; }; +struct riscv_efi_boot_protocol { + u64 revision; + + efi_status_t (__efiapi * get_boot_hartid)(struct riscv_efi_boot_protocol *this, + size_t *boot_hartid); +}; + typedef union efi_load_file_protocol efi_load_file_protocol_t; typedef union efi_load_file_protocol efi_load_file2_protocol_t; diff --git a/drivers/firmware/efi/libstub/riscv-stub.c b/drivers/firmware/efi/libstub/riscv-stub.c index 9c460843442f..012504f6f9a4 100644 --- a/drivers/firmware/efi/libstub/riscv-stub.c +++ b/drivers/firmware/efi/libstub/riscv-stub.c @@ -23,7 +23,7 @@ typedef void __noreturn (*jump_kernel_func)(unsigned int, unsigned long); -static u32 hartid; +static size_t hartid; static int get_boot_hartid_from_fdt(void) { @@ -47,14 +47,33 @@ static int get_boot_hartid_from_fdt(void) return 0; } +static efi_status_t get_boot_hartid_from_efi(void) +{ + efi_guid_t boot_protocol_guid = RISCV_EFI_BOOT_PROTOCOL_GUID; + efi_status_t status; + struct riscv_efi_boot_protocol *boot_protocol; + + status = efi_bs_call(locate_protocol, &boot_protocol_guid, NULL, + (void **)&boot_protocol); + if (status == EFI_SUCCESS) { + status = efi_call_proto(boot_protocol, + get_boot_hartid, &hartid); + } + return status; +} + efi_status_t check_platform_features(void) { int ret; + efi_status_t status; - ret = get_boot_hartid_from_fdt(); - if (ret) { - efi_err("/chosen/boot-hartid missing or invalid!\n"); - return EFI_UNSUPPORTED; + status = get_boot_hartid_from_efi(); + if (status != EFI_SUCCESS) { + ret = get_boot_hartid_from_fdt(); + if (ret) { + efi_err("Failed to get boot hartid!\n"); + return EFI_UNSUPPORTED; + } } return EFI_SUCCESS; } diff --git a/include/linux/efi.h b/include/linux/efi.h index ccd4d3f91c98..9822c730207c 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -380,6 +380,7 @@ void efi_native_runtime_setup(void); #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0) #define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f) +#define RISCV_EFI_BOOT_PROTOCOL_GUID EFI_GUID(0xccd15fec, 0x6f73, 0x4eec, 0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf) #define EFI_LOAD_FILE_PROTOCOL_GUID EFI_GUID(0x56ec3091, 0x954c, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) #define EFI_LOAD_FILE2_PROTOCOL_GUID EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e, 0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d) #define EFI_RT_PROPERTIES_TABLE_GUID EFI_GUID(0xeb66918a, 0x7eef, 0x402a, 0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9) -- 2.25.1