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[64.71.28.71]) by smtp.gmail.com with ESMTPSA id p3sm1336423pjo.3.2019.08.20.21.14.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 20 Aug 2019 21:14:45 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) Subject: Re: [PATCH 15/15] riscv: disable the EFI PECOFF header for M-mode From: Troy Benjegerdes In-Reply-To: <20190813154747.24256-16-hch@lst.de> Date: Tue, 20 Aug 2019 21:14:41 -0700 Cc: Palmer Dabbelt , Paul Walmsley , Damien Le Moal , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Message-Id: <3BF39A0F-558D-40E0-880D-27829486F9F0@sifive.com> References: <20190813154747.24256-1-hch@lst.de> <20190813154747.24256-16-hch@lst.de> To: Christoph Hellwig X-Mailer: Apple Mail (2.3445.9.1) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Aug 13, 2019, at 8:47 AM, Christoph Hellwig wrote: >=20 > No point in bloating the kernel image with a bootloader header if > we run bare metal. I would say the same for S-mode. EFI booting should be an option, not a requirement. I have M-mode U-boot working with bootelf to start BBL, and at some point, I=E2=80=99m hoping we can have a M-mode linux kernel = be the SBI provider for S-mode kernels, which seem most logical to me to start using the vmlinux elf binaries using something like kexec() >=20 > Signed-off-by: Christoph Hellwig > --- > arch/riscv/kernel/head.S | 2 ++ > 1 file changed, 2 insertions(+) >=20 > diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S > index 670e5cacb24e..09fcf3d000c0 100644 > --- a/arch/riscv/kernel/head.S > +++ b/arch/riscv/kernel/head.S > @@ -16,6 +16,7 @@ >=20 > __INIT > ENTRY(_start) > +#ifndef CONFIG_M_MODE > /* > * Image header expected by Linux boot-loaders. The image header = data > * structure is described in asm/image.h. > @@ -47,6 +48,7 @@ ENTRY(_start) >=20 > .global _start_kernel > _start_kernel: > +#endif /* CONFIG_M_MODE */ > /* Mask all interrupts */ > csrw CSR_XIE, zero > csrw CSR_XIP, zero > --=20 > 2.20.1 >=20 >=20 > _______________________________________________ > linux-riscv mailing list > linux-riscv@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-riscv 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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 3E19EC3A59E for ; Wed, 21 Aug 2019 04:14:57 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 10B4C206DF for ; Wed, 21 Aug 2019 04:14:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ADAKJMS3"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="DrmJcYu9" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 10B4C206DF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sifive.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+infradead-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=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:To:References:Message-Id:Date: In-Reply-To:From:Subject:Mime-Version:Reply-To:Content-ID:Content-Description :Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=BUoEJstvdysQf3yspHlz2zvP6N3dr+EjmxVogKtJspU=; b=ADAKJMS3u6sW2i THUZI45B/32/UqPmQ6m1iHfLbBDCGL1pbGbUqMUVXcOCX4nrY6+YgtHcsNb7SVlYQ5ODk4WlSjxFI wKXoCBZ7rTBVvlFgQC/GRz2vNGteTTwR/NGaPv7xTXVBkLBVyAw5sf0AZpJPL3XoAB2WRmBeHeOCi xUlE3Amwm8T6S8sSDpPa0FRvC6LIAETHx/LHos9So3Rx6PW/5W7IjMxwgk6a5MbN/2RbKvg6h4bhM jQfQvR3dTWtNWzbMtm8w6gWdCVcT5jbJljvy/JliuZurURz1dMabcVIdJ/LPqWrp0IItGP1jELN1e SxmW62uY89ilU/enVwjQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i0I1P-00017A-Lh; Wed, 21 Aug 2019 04:14:55 +0000 Received: from mail-pf1-x444.google.com ([2607:f8b0:4864:20::444]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i0I1M-00016L-H2 for linux-riscv@lists.infradead.org; Wed, 21 Aug 2019 04:14:54 +0000 Received: by mail-pf1-x444.google.com with SMTP id d85so539191pfd.2 for ; Tue, 20 Aug 2019 21:14:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=Ct/vcfqX294xnImjewrmDMG+pNu8phs+mheV9IoXqXA=; b=DrmJcYu9mQkQ+5oXyRM9YqgXYA0IMMSiWznW5HVNzzMJ7ZV0GEzazOoMN6L5eiLmcJ cYAa9F/vsLCVlLq75If9r/eW75gmVC5de/ALXLQHXE5wAgEmN2+EanhC5XNg9Yyd44w7 D5nqrXJeT1pbW9bi9iEn0ISOPHcFxNde3UV/dmGNpgE0GFhQVYQ5Y4sWjzHth8/dYrxh kk4jdkPx4SF+lRqREUhytqk6W6orEntQWFKrvd7DnmuGzYew2VX4icnkCrgwsKYsoXuq h/24DG9iI62yoeJ6AQ+P3YVuOZb5PJTUYw4y/9aQYmI+CHlmQ7qpwNFf+K1GnCvE1bZz LKGQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=Ct/vcfqX294xnImjewrmDMG+pNu8phs+mheV9IoXqXA=; b=szIHnQeksLajcI79Gqj5Hhp/4tDTFbkwMVRKRwOHkXnRryhYVEMiv5j5Wd7zwnuV6k ya1WXBtVm9TIhvLfI9yxxIpNS0QlPXAEyBrXggR6SdHfbKJtXBd3SNaohmkf/GpJ9FrZ 8X+k2axZ5lQeeWCT4MHh5yiPqxWGXXm72kOWn0bPjmQZ3tBzyUbT7yqf4ORgDz5unzeK BZcFYm0D0QEBPkPRp9UfuIg+64c7RZxShS8OFxlm6jQ35GgdNKAJUnfhIUSEqpb8eGQS 7POiIcq7wV1W3zg4vAdHE0RyvrFfT8WB6aABIb4rPSGfMGQ6m6iwbRLXjug4i10e3vM/ Pq7g== X-Gm-Message-State: APjAAAU4xbmfkLq1y7USi2fcUl+qmdD68E80nshV9ZL5vVYGLDmWSMER pqoXZ//OYRR3iF4aVhEjS+0eVw== X-Google-Smtp-Source: APXvYqyTnwrp6dMD25VYpFUckTpU2oPfnP6GLcw49ySJC+PsfTX2cQkXPs52ILKSDbS02wHzdCRHEw== X-Received: by 2002:a62:dbc6:: with SMTP id f189mr4364709pfg.237.1566360885909; Tue, 20 Aug 2019 21:14:45 -0700 (PDT) Received: from [172.20.2.243] (64-71-28-71.static.wiline.com. [64.71.28.71]) by smtp.gmail.com with ESMTPSA id p3sm1336423pjo.3.2019.08.20.21.14.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 20 Aug 2019 21:14:45 -0700 (PDT) Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) Subject: Re: [PATCH 15/15] riscv: disable the EFI PECOFF header for M-mode From: Troy Benjegerdes In-Reply-To: <20190813154747.24256-16-hch@lst.de> Date: Tue, 20 Aug 2019 21:14:41 -0700 Message-Id: <3BF39A0F-558D-40E0-880D-27829486F9F0@sifive.com> References: <20190813154747.24256-1-hch@lst.de> <20190813154747.24256-16-hch@lst.de> To: Christoph Hellwig X-Mailer: Apple Mail (2.3445.9.1) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190820_211452_569372_A5C59263 X-CRM114-Status: GOOD ( 15.58 ) 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: linux-kernel@vger.kernel.org, Damien Le Moal , Palmer Dabbelt , linux-riscv@lists.infradead.org, Paul Walmsley Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org Cgo+IE9uIEF1ZyAxMywgMjAxOSwgYXQgODo0NyBBTSwgQ2hyaXN0b3BoIEhlbGx3aWcgPGhjaEBs c3QuZGU+IHdyb3RlOgo+IAo+IE5vIHBvaW50IGluIGJsb2F0aW5nIHRoZSBrZXJuZWwgaW1hZ2Ug d2l0aCBhIGJvb3Rsb2FkZXIgaGVhZGVyIGlmCj4gd2UgcnVuIGJhcmUgbWV0YWwuCgpJIHdvdWxk IHNheSB0aGUgc2FtZSBmb3IgUy1tb2RlLiBFRkkgYm9vdGluZyBzaG91bGQgYmUgYW4gb3B0aW9u LCBub3QKYSByZXF1aXJlbWVudC4gSSBoYXZlIE0tbW9kZSBVLWJvb3Qgd29ya2luZyB3aXRoIGJv b3RlbGYgdG8gc3RhcnQgQkJMLAphbmQgYXQgc29tZSBwb2ludCwgSeKAmW0gaG9waW5nIHdlIGNh biBoYXZlIGEgTS1tb2RlIGxpbnV4IGtlcm5lbCBiZQp0aGUgU0JJIHByb3ZpZGVyIGZvciBTLW1v ZGUga2VybmVscywgd2hpY2ggc2VlbSBtb3N0IGxvZ2ljYWwgdG8gbWUKdG8gc3RhcnQgdXNpbmcg dGhlIHZtbGludXggZWxmIGJpbmFyaWVzIHVzaW5nIHNvbWV0aGluZyBsaWtlIGtleGVjKCkKCj4g Cj4gU2lnbmVkLW9mZi1ieTogQ2hyaXN0b3BoIEhlbGx3aWcgPGhjaEBsc3QuZGU+Cj4gLS0tCj4g YXJjaC9yaXNjdi9rZXJuZWwvaGVhZC5TIHwgMiArKwo+IDEgZmlsZSBjaGFuZ2VkLCAyIGluc2Vy dGlvbnMoKykKPiAKPiBkaWZmIC0tZ2l0IGEvYXJjaC9yaXNjdi9rZXJuZWwvaGVhZC5TIGIvYXJj aC9yaXNjdi9rZXJuZWwvaGVhZC5TCj4gaW5kZXggNjcwZTVjYWNiMjRlLi4wOWZjZjNkMDAwYzAg MTAwNjQ0Cj4gLS0tIGEvYXJjaC9yaXNjdi9rZXJuZWwvaGVhZC5TCj4gKysrIGIvYXJjaC9yaXNj di9rZXJuZWwvaGVhZC5TCj4gQEAgLTE2LDYgKzE2LDcgQEAKPiAKPiBfX0lOSVQKPiBFTlRSWShf c3RhcnQpCj4gKyNpZm5kZWYgQ09ORklHX01fTU9ERQo+IAkvKgo+IAkgKiBJbWFnZSBoZWFkZXIg ZXhwZWN0ZWQgYnkgTGludXggYm9vdC1sb2FkZXJzLiBUaGUgaW1hZ2UgaGVhZGVyIGRhdGEKPiAJ ICogc3RydWN0dXJlIGlzIGRlc2NyaWJlZCBpbiBhc20vaW1hZ2UuaC4KPiBAQCAtNDcsNiArNDgs NyBAQCBFTlRSWShfc3RhcnQpCj4gCj4gLmdsb2JhbCBfc3RhcnRfa2VybmVsCj4gX3N0YXJ0X2tl cm5lbDoKPiArI2VuZGlmIC8qIENPTkZJR19NX01PREUgKi8KPiAJLyogTWFzayBhbGwgaW50ZXJy dXB0cyAqLwo+IAljc3J3IENTUl9YSUUsIHplcm8KPiAJY3NydyBDU1JfWElQLCB6ZXJvCj4gLS0g Cj4gMi4yMC4xCj4gCj4gCj4gX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX18KPiBsaW51eC1yaXNjdiBtYWlsaW5nIGxpc3QKPiBsaW51eC1yaXNjdkBsaXN0cy5p bmZyYWRlYWQub3JnCj4gaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5m by9saW51eC1yaXNjdgoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fCmxpbnV4LXJpc2N2IG1haWxpbmcgbGlzdApsaW51eC1yaXNjdkBsaXN0cy5pbmZyYWRl YWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgt cmlzY3YK