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 6FB59C4332F for ; Thu, 24 Mar 2022 11:01:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349628AbiCXLCp (ORCPT ); Thu, 24 Mar 2022 07:02:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55002 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344477AbiCXLCn (ORCPT ); Thu, 24 Mar 2022 07:02:43 -0400 Received: from mail-pj1-x102a.google.com (mail-pj1-x102a.google.com [IPv6:2607:f8b0:4864:20::102a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18AF49286F for ; Thu, 24 Mar 2022 04:01:12 -0700 (PDT) Received: by mail-pj1-x102a.google.com with SMTP id e6-20020a17090a77c600b001c795ee41e9so4179476pjs.4 for ; Thu, 24 Mar 2022 04:01:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=TgxDvrGaoMcFgStBxDsJOk2r+RouA2NL1p9DYfmaMws=; b=dl3kUSUKr6hRrdJIc2h86tl6HHGvyog2XfukxAIGMMQBC4lsYPXJ404lp5Fm56hBgt juKH2zHD+Ma/ZSZYMI5w3ChJsT+ZaA3YcWyYNOXgl+yrf4XXUrPxU8CElLn4q/NB3b0x EZ5K2YdEj4we4YyKg7/vkDCA1Fkne5pdLbT/Uf6ibsV6C9PJOOejFHReVnm0NInquWB4 4Lr6wx8TFnkXh+2RlArZKstGwCNrp5Hh+uyp9E+suexcGmEftGFsvMcB66WY7KqMuw8R 2xSknYUMcQbnDozIKc0X7AbVPfVScJeQRCPw/YKf3xVQADR7QFY8GpJaCl7KGt9guJRF Pb5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=TgxDvrGaoMcFgStBxDsJOk2r+RouA2NL1p9DYfmaMws=; b=v0rXX6rt4yxrFOSxYsq9Q+g4ZoaFvYg28qHwUVAIyqTp0zWOfJ1FAmE3A01WDYFYbG 2EoC9p5da4E+qdE2dahZzXPRkUwlAD+7uK2Wq0GNGOYaIO9zgvJc7jJDmtozkimqo93W fyzRhTLQgdLGWOD+z/00m43Dxp3go0/FNcWrUMnBp5ezt7nKGHzjNjYMnnJwzpshXulw jQwycIe6/qUTTUuBBY+YuHpZocPaJDgWLHsvdmPTYMJ/fzY3nTOoJyGXjTRoQZ4sW6/e YV6MOk/FMGc4cFZPs/Pa5YK8zpWIQsIdKeGBAEZ220i8ItSJ8Ml/rGFYoFWlF7H1p8uv g6xQ== X-Gm-Message-State: AOAM533An443447yfeu9PO+vUDWBawbZyN1lzA+o9rDiNv7Z3BxJHaV0 DZ7Lt4f23F+CPSiTc9ZAMCZwaA== X-Google-Smtp-Source: ABdhPJyn/dodVmHBih3bECPHt+1UUA3UbDcrcUkYbhDx74DUGpzeJn7hv2UTAgKdnJd8CFFz6OJZow== X-Received: by 2002:a17:902:cf0f:b0:154:70ca:11d0 with SMTP id i15-20020a170902cf0f00b0015470ca11d0mr5211055plg.28.1648119671399; Thu, 24 Mar 2022 04:01:11 -0700 (PDT) Received: from sunil-laptop ([49.206.7.17]) by smtp.gmail.com with ESMTPSA id d11-20020a056a00198b00b004fa7da68465sm3172992pfl.60.2022.03.24.04.01.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Mar 2022 04:01:11 -0700 (PDT) Date: Thu, 24 Mar 2022 16:31:01 +0530 From: Sunil V L To: Palmer Dabbelt Cc: ardb@kernel.org, Paul Walmsley , aou@eecs.berkeley.edu, heinrich.schuchardt@canonical.com, Atish Patra , apatel@ventanamicro.com, abner.chang@hpe.com, jrtc27@jrtc27.com, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: Re: [RFC PATCH V2 1/1] riscv/efi_stub: Add support for RISCV_EFI_BOOT_PROTOCOL Message-ID: <20220324110101.GA36244@sunil-laptop> References: <20220303145944.307321-2-sunilvl@ventanamicro.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 22, 2022 at 06:32:20PM -0700, Palmer Dabbelt wrote: > On Thu, 03 Mar 2022 06:59:44 PST (-0800), sunilvl@ventanamicro.com wrote: > > 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 > > --- > > 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..915ad209d004 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("/chosen/boot-hartid missing or invalid!\n"); > > Is that the right error message? IIUC it doesn't really make sense in an > ACPI context, that's a DT-ism. Sure. Will update this message in next version. Thanks Sunil > > > + 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)