From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f177.google.com (mail-pg1-f177.google.com [209.85.215.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D1C96320380 for ; Thu, 11 Sep 2025 11:36:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.177 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757590610; cv=none; b=BI02ZpPejU+SBVpLbdF6uqg3eCSjzwD472JjO7CAak2Q0t4dby2UU/RHO0fKrKcAMFgreW5+sbxwC4scK2cEVnjK2r4Z7cJMNGp5xq7L8c5BGMnjHzBTvkzeoNuxHgfcVTV/XQM1Ou52i2eEVqWMCjHFl3ZP/rFl7zUDQ3Ae1JA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757590610; c=relaxed/simple; bh=/rVSsz4zURSRH6cQYurBS9NzYyNvGJ8R8I2UkETrSDI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Ats6HVOrtYro0zjf+3iqckjsDHz7gmESIhOSLmiwo9jvWyQBl7Axuq8LB6oe2CK5/ot9+mXhCDmFEqBYUXYs9E776F9krSgKSK6U+T3zoAPHN++xqYxX4Tuvh1c7cj69RbUyd09RLYUL3nUTAOvFOyo2eNPR+GlYHr1468DWcvo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=VZ6NWQJl; arc=none smtp.client-ip=209.85.215.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="VZ6NWQJl" Received: by mail-pg1-f177.google.com with SMTP id 41be03b00d2f7-b523fb676efso506499a12.3 for ; Thu, 11 Sep 2025 04:36:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1757590608; x=1758195408; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=/rVSsz4zURSRH6cQYurBS9NzYyNvGJ8R8I2UkETrSDI=; b=VZ6NWQJlM3lS7Fk6lrtVcS6dLeXoqkS9dpJCcH3EKL4AEvDcfsT0XTFIrAWk9a1XGd 50mYu4L+9pPOGo0ORYIIB5eQuGFd7gu+fkMpHT49fBbTJm4pL5V0fLrQBrQt84vDp5+n gJh2Pn2CqvBoavZ9M6gDWGJpEXz932x18yBOjiNUP7Ep2TOoWR518IG95NEHDIv0dqVH IRukqx0f3nMgQz/rMVw1fVMTnThIhMsENtAMvinQj6pgCitKqcrxdexQW89BfMY+sncW QfBzO6vG0dD3zMfmjDsWXNlohQvDccLu2YqqTdJgkfLCbW4McjuOBdy+UHMhM2uDJjOc khSg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757590608; x=1758195408; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=/rVSsz4zURSRH6cQYurBS9NzYyNvGJ8R8I2UkETrSDI=; b=Ysab2WEqU3nEzqqkK/1ncLzBpRR8ggvuktGgsrK0mqe9xJiicCfPSOEir3EkdU7LbZ pwWwUdGRoVbiWSfRmwGnpb0JXWJ1doIJt2UtzFGGe0iuzcyeb65ukwPToJTRLCi/PVIK Zbi6NATIObaSgFmCIHjS7G1Ze6zfEExWWycOQHmYiMgrP/aGYB+7c0dRGzkLWdbJMn4R LXyn+3A6+DqT8y5C6dnSgcUq7POBNTwc0eVh4A5wb+amtgXs16iHXdc8h4HCDr9K8dSd wZHIoBMOljDYA/l+U/hT1WelfV6Xw2hIYzP+XV7faNriaL/XiILEPPB19sUzkb8Mrhjd c4ng== X-Gm-Message-State: AOJu0YySNu6qYKnL6lv3s87J5vrMKrQbAbJfTKm1ZmH2gGuoeRPDH4jh 6qkVY50BW2HLmfRsiL0+9epN5la2nPIABLS4eVK2Fw01IU8EkkS5L9Ik X-Gm-Gg: ASbGncvQHxLbIAWvjCe9yJ+yO6EEpy/to8k3W4S1lPcwaOLwjvWvPAUXZqUOOoEkOxW bGcpexGIR7lqvmhzlKTvGGgn12BAIV58cCuw1BQ+wk6BZuSBEj+TtoYknpLyqw/0st+2/o+q3tU ByOKa2qFtrvQt1P5c7nDXlRK2+e8s/YGwf0g0Hrwnmhj4XGD2uQHYap3FNZXUjikkqL9YyajQSn mHtnp1Y1n8g2ZpOv8aLR/juDZyBfQoowTFKcA+8T1KcvcFnomoxq2LngwbBLW4iG2aEx4LVrNrH sQQQkP8EbdRmK32/Mao1CMhL5MG55zrMe0okiJjgwOZon0jUDeKu58CUUcjSGeLU+AmGnsdd0Vc 6P5xDLHwz7OrgXEpL8xTAX1aGNg== X-Google-Smtp-Source: AGHT+IGODxcwXdfHAsRfp0VXOV718vy1zFbFo7MXwhCxvdkM6aonShv8X7Ss+ZzUqwEpBGF+WUBA0Q== X-Received: by 2002:a17:902:db01:b0:24d:e8f5:13b1 with SMTP id d9443c01a7336-25171bc0549mr238763465ad.40.1757590607913; Thu, 11 Sep 2025 04:36:47 -0700 (PDT) Received: from archie.me ([103.124.138.155]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-25c36cc53adsm17096545ad.25.2025.09.11.04.36.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Sep 2025 04:36:46 -0700 (PDT) Received: by archie.me (Postfix, from userid 1000) id 2100341FA3A1; Thu, 11 Sep 2025 18:36:43 +0700 (WIB) Date: Thu, 11 Sep 2025 18:36:42 +0700 From: Bagas Sanjaya To: Ard Biesheuvel Cc: Linux Kernel Mailing List , Linux Documentation , Linux EFI , Jonathan Corbet , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Hugo Osvaldo Barrera Subject: Re: [PATCH] x86/Documentation: explain LINUX_EFI_INITRD_MEDIA_GUID Message-ID: References: <20250910015738.14848-2-bagasdotme@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="/CycQuWEbUcN6Xks" Content-Disposition: inline In-Reply-To: --/CycQuWEbUcN6Xks Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Sep 11, 2025 at 08:46:50AM +0200, Ard Biesheuvel wrote: > On Wed, 10 Sept 2025 at 03:58, Bagas Sanjaya wrote: > > +PE/COFF entry point > > +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > > + > > +When compiled with ``CONFIG_EFI_STUB=3Dy``, the kernel can be executed= as a > > +regular PE/COFF binary. See Documentation/admin-guide/efi-stub.rst for > > +implementation details. > > + > > +The stub loader can request the initrd via a UEFI protocol. For this t= o work, > > +the firmware or bootloader needs to register a handle which implements= the >=20 > ... which carries implementations of the ``EFI_LOAD_FILE2`` protocol > and the device path protocol exposing the > ``LINUX_EFI_INITRD_MEDIA_GUID`` vendor media device path. >=20 > > +``EFI_LOAD_FILE2`` protocol with the ``LINUX_EFI_INITRD_MEDIA_GUID`` d= evice > > +path. In this case, a kernel booting via the EFI stub will use the ``L= oadFile`` > > +function on the registered handle to obtain a reference to the initrd. > > + >=20 > ... will invoke LoadFile2::LoadFile() method on the registered > protocol to instruct the firmware to load the initrd into a memory > location chosen by the kernel/EFI stub. Thanks for the wording suggestions! --=20 An old man doll... just what I always wanted! - Clara --/CycQuWEbUcN6Xks Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQSSYQ6Cy7oyFNCHrUH2uYlJVVFOowUCaMK0RgAKCRD2uYlJVVFO ozStAP9mQA9cCfHsaQldql/hMVFcwMOShKbDfTeC6DADNy+HuQEA8+ArAu2x9zYZ ON+dh6RUyGHdAxdwM2QwtIT8cv91UQI= =SYxy -----END PGP SIGNATURE----- --/CycQuWEbUcN6Xks--