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Thu, 22 Jan 2026 10:57:52 -0800 (PST) Received: from chromium.org ([202.144.206.254]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a71942248asm191926615ad.98.2026.01.22.10.57.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Jan 2026 10:57:51 -0800 (PST) From: Simon Glass To: ubizjak@gmail.com, linux-kernel@vger.kernel.org Cc: akpm@linux-foundation.org, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, kas@kernel.org, kees@kernel.org, linux-coco@lists.linux.dev, mingo@redhat.com, nathan@kernel.org, peterz@infradead.org, pmladek@suse.com, rick.p.edgecombe@intel.com, tglx@kernel.org, x86@kernel.org, Simon Glass Subject: re: [PATCH v1 08/14] x86: make CONFIG_EFI_STUB unconditional Date: Fri, 23 Jan 2026 07:57:39 +1300 Message-ID: <20260122185740.50298-1-sjg@chromium.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Peter, On Tue, Jan 20, 2026 at 8:54 PM H. Peter Anvin wrote: > > The EFI stub code is mature, most current x86 systems require EFI to > boot, and as it is exclusively preboot code, it doesn't affect the > runtime memory footprint at all. > > It makes absolutely no sense to omit it anymore, so make it > unconditional. > > Signed-off-by: H. Peter Anvin (Intel) > --- > arch/x86/Kconfig | 14 ++------------ > arch/x86/boot/compressed/Makefile | 2 -- > arch/x86/boot/compressed/error.c | 2 -- > arch/x86/boot/header.S | 3 --- > 4 files changed, 2 insertions(+), 19 deletions(-) At least with QEMU the EFI protocol adds quite a lot of overhead. Is there any actual need for this? Regards, Simon