From nobody Mon Feb 9 15:10:31 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 082C12EBDD9; Sun, 14 Dec 2025 08:37:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765701471; cv=none; b=eaTflNfqT7u5eD5CqA92e2XLc6+MhctP3RbpeIxVxjG9o6ykEYZF/8mKopKUlcD1TTPEokq/OsEq1UfFKMmDIMzNeCz37IuD20Jvs6m2K11nKUNOHCYgNk/SpKM599mcfRE08UI0BgpOdQdec4+fng7FuZZJSmZnYynLPDzawqY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765701471; c=relaxed/simple; bh=plTND4aaHBLA/I0tbvNbBIzadal++UM7xLDXkWWhZEM=; h=Date:From:To:Subject:Cc:In-Reply-To:References:MIME-Version: Message-ID:Content-Type; b=kNMuV4jUlhFaxCiQiLuApkhEG9Lr7tAhZZCnI6qqTpKtcoySiPfNq3UUdZ1jx85+eQR02vIUzVfyrLUVe53IYX8z8AyzzRj0DiMyUsunuSIq6Tb1nEvlWnTjsRaX6ogioWpsfL8OStDcE2tlg8a/ViprBVdCqs+M7zWKTEx5oLQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=gIs/Z5zO; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=xYjf6izv; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="gIs/Z5zO"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="xYjf6izv" Date: Sun, 14 Dec 2025 08:37:46 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1765701467; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fuPBrAaQPeiG7Nwfux+daxxcdg34pw63g1v2XbUyRsU=; b=gIs/Z5zOmHyh3pY8Z7VdZ66JclTP/NzZZO1VdLblcrAiKEEQXxeYYliRdMVEQLydhpUmTq 8BnYX7dYLfbPWK0c6JWHQ38krZ7dOdYw0ni/xM8KMOoPNFHgTJbQqcc2k5cqKZ1ksznTUQ JQ1E7PyxLDu2aRaf6kKOxukWr29HP1zUxSLEkEYu2VT+m61FgOTP/JMxv2vnS0L0eU5htt gZCem/iPJf+FZ7XdvjGMHWhywj9IbB+yCK2oen2Pv1wKcNzU3QwE5ae7B4GuM0FlzbW/mm jh29pQEZbedrM0kk+UC0Wc8Ex5fuN6IMkUH3tm2lgloRNXCFqAaKfxiEdP7Y1A== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1765701467; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fuPBrAaQPeiG7Nwfux+daxxcdg34pw63g1v2XbUyRsU=; b=xYjf6izvlJrdjNLfbUKgFVcB67yM/y2BXMOJ7u2SIubTYhnumv0DsT5SHVcSOgbxALp7z1 P5suE1UKYFYtBICw== From: "tip-bot2 for Ingo Molnar" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: x86/boot] x86/boot/e820: Simplify the PPro Erratum #50 workaround Cc: Ingo Molnar , "H . Peter Anvin" , Andy Shevchenko , Arnd Bergmann , David Woodhouse , Juergen Gross , Kees Cook , Linus Torvalds , Mike Rapoport , Paul Menzel , Peter Zijlstra , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20250515120549.2820541-4-mingo@kernel.org> References: <20250515120549.2820541-4-mingo@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <176570146639.498.17304505535216995399.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Precedence: bulk Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The following commit has been merged into the x86/boot branch of tip: Commit-ID: 3814bf08452ecfc6db0de53a2e4f977e9661c1f4 Gitweb: https://git.kernel.org/tip/3814bf08452ecfc6db0de53a2e4f977e9= 661c1f4 Author: Ingo Molnar AuthorDate: Thu, 15 May 2025 14:05:19 +02:00 Committer: Ingo Molnar CommitterDate: Sun, 14 Dec 2025 09:19:37 +01:00 x86/boot/e820: Simplify the PPro Erratum #50 workaround No need to print out the table - users won't really be able to tell much from it anyway and the messages around this erratum are unnecessarily obtuse. Instead clearly inform the user that a 256 kB hole is being punched in their memory map at the 1.75 GB physical address. Not that there are many PPro users left. :-) Signed-off-by: Ingo Molnar Cc: H . Peter Anvin Cc: Andy Shevchenko Cc: Arnd Bergmann Cc: David Woodhouse Cc: Juergen Gross Cc: Kees Cook Cc: Linus Torvalds Cc: Mike Rapoport Cc: Paul Menzel Cc: Peter Zijlstra Link: https://patch.msgid.link/20250515120549.2820541-4-mingo@kernel.org --- arch/x86/kernel/setup.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 1b2edd0..a231b24 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1015,11 +1015,9 @@ void __init setup_arch(char **cmdline_p) trim_bios_range(); #ifdef CONFIG_X86_32 if (ppro_with_ram_bug()) { - e820__range_update(0x70000000ULL, 0x40000ULL, E820_TYPE_RAM, - E820_TYPE_RESERVED); + pr_info("Applying PPro RAM bug workaround: punching 256 kB hole at 1.75 = GB physical.\n"); + e820__range_update(0x70000000ULL, SZ_256K, E820_TYPE_RAM, E820_TYPE_RESE= RVED); e820__update_table(e820_table); - printk(KERN_INFO "fixed physical RAM map:\n"); - e820__print_table("bad_ppro"); } #else early_gart_iommu_check();