Message ID | 20240117144704.602-7-graf@amazon.com |
---|---|
State | New |
Headers |
Return-Path: <linux-kernel+bounces-29099-ouuuleilei=gmail.com@vger.kernel.org> Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:42cf:b0:101:a8e8:374 with SMTP id q15csp957560dye; Wed, 17 Jan 2024 06:50:09 -0800 (PST) X-Google-Smtp-Source: AGHT+IFLPLCCsKuFf+tiasgaPgib9+3S+ACiTsMyPFU0NGLd0gsbLM7G/eJvInzao59QOrqyVphP X-Received: by 2002:ad4:5f45:0:b0:681:7b3f:352f with SMTP id p5-20020ad45f45000000b006817b3f352fmr1499691qvg.83.1705503009678; Wed, 17 Jan 2024 06:50:09 -0800 (PST) Received: from ny.mirrors.kernel.org (ny.mirrors.kernel.org. [2604:1380:45d1:ec00::1]) by mx.google.com with ESMTPS id w9-20020a0ca809000000b0067f0540d19asi3690758qva.444.2024.01.17.06.50.09 for <ouuuleilei@gmail.com> (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Jan 2024 06:50:09 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-29099-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1; Authentication-Results: mx.google.com; dkim=pass header.i=@amazon.com header.s=amazon201209 header.b=XnDp3tPR; arc=fail (signature failed); spf=pass (google.com: domain of linux-kernel+bounces-29099-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-29099-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amazon.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ny.mirrors.kernel.org (Postfix) with ESMTPS id C96F71C21928 for <ouuuleilei@gmail.com>; Wed, 17 Jan 2024 14:50:06 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id CA2FA22337; Wed, 17 Jan 2024 14:48:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="XnDp3tPR" Received: from smtp-fw-9106.amazon.com (smtp-fw-9106.amazon.com [207.171.188.206]) (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 A7406210FC; Wed, 17 Jan 2024 14:48:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=207.171.188.206 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705502911; cv=none; b=f+2SrKGD+nXCVU5rkkTJm+wQtcANsRgWCw6SqYUmtHhlwjfwEkuBCXIZSCUlevKCEOfkgM6MtWK3fTzJux+xtIdrJ+0vbp7UN4auvAYNuwA1RH59zWrSFFWvVzTnoqGOXH3s/2ijALdZOSSnzA16idYqerURffV5W2ktfz+w4s0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705502911; c=relaxed/simple; bh=u1I/yukv6pRKKPxwf8zp06f6VoKb5iMIpg1liIli3OE=; h=DKIM-Signature:X-IronPort-AV:Received:Received:Received: X-Farcaster-Flow-ID:Received:Received:From:To:CC:Subject:Date: Message-ID:X-Mailer:In-Reply-To:References:MIME-Version: X-Originating-IP:X-ClientProxiedBy:Content-Type: Content-Transfer-Encoding; b=iP1iyrzTNSqVaxBhMJ6e/itsM3DEDna4WrhHHxaiVIYnkW1ONTyA18UaE4qXZz2rpVu97WzMnpvhEBgn6I4YMT6//3Q99rKEagj/4G7mHuNplQIP4vKT0rcS03LEft0hGKgoSW4Y02pjOItET9efjjDumvpPNFN1MgC6jMHUutI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com; spf=pass smtp.mailfrom=amazon.de; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b=XnDp3tPR; arc=none smtp.client-ip=207.171.188.206 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1705502910; x=1737038910; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=d6zY75UaUomPQ5EhDGeFWm39K87gMNJwzqvhZ/SkIvI=; b=XnDp3tPROQ7tYjF5KmNjsYRirJWudKPMy2k081bQOlH4wd5r5I8FMDhT IK1YrHd4fU/6oGcpBOWF3ZducRORsUKXb2JE5IN1tuNWC9emuQiOUoUBJ muUXDmpnr5E4wTXoI0gyUhiGJiHsky9fR2/tc66lKBoDsepi4K58Hxz9/ U=; X-IronPort-AV: E=Sophos;i="6.05,200,1701129600"; d="scan'208";a="697788568" Received: from pdx4-co-svc-p1-lb2-vlan2.amazon.com (HELO email-inbound-relay-iad-1a-m6i4x-366646a6.us-east-1.amazon.com) ([10.25.36.210]) by smtp-border-fw-9106.sea19.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Jan 2024 14:48:22 +0000 Received: from smtpout.prod.us-west-2.prod.farcaster.email.amazon.dev (iad7-ws-svc-p70-lb3-vlan2.iad.amazon.com [10.32.235.34]) by email-inbound-relay-iad-1a-m6i4x-366646a6.us-east-1.amazon.com (Postfix) with ESMTPS id 37BC9A0A9E; Wed, 17 Jan 2024 14:48:18 +0000 (UTC) Received: from EX19MTAUWA002.ant.amazon.com [10.0.21.151:26746] by smtpin.naws.us-west-2.prod.farcaster.email.amazon.dev [10.0.60.181:2525] with esmtp (Farcaster) id c922b8c6-218f-4e2e-bfa4-5cd050b28dc6; Wed, 17 Jan 2024 14:48:17 +0000 (UTC) X-Farcaster-Flow-ID: c922b8c6-218f-4e2e-bfa4-5cd050b28dc6 Received: from EX19D020UWC004.ant.amazon.com (10.13.138.149) by EX19MTAUWA002.ant.amazon.com (10.250.64.202) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Wed, 17 Jan 2024 14:48:17 +0000 Received: from dev-dsk-graf-1a-5ce218e4.eu-west-1.amazon.com (10.253.83.51) by EX19D020UWC004.ant.amazon.com (10.13.138.149) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Wed, 17 Jan 2024 14:48:13 +0000 From: Alexander Graf <graf@amazon.com> To: <linux-kernel@vger.kernel.org> CC: <linux-trace-kernel@vger.kernel.org>, <linux-mm@kvack.org>, <devicetree@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <kexec@lists.infradead.org>, <linux-doc@vger.kernel.org>, <x86@kernel.org>, Eric Biederman <ebiederm@xmission.com>, "H . Peter Anvin" <hpa@zytor.com>, Andy Lutomirski <luto@kernel.org>, Peter Zijlstra <peterz@infradead.org>, Steven Rostedt <rostedt@goodmis.org>, Andrew Morton <akpm@linux-foundation.org>, Mark Rutland <mark.rutland@arm.com>, "Tom Lendacky" <thomas.lendacky@amd.com>, Ashish Kalra <ashish.kalra@amd.com>, James Gowans <jgowans@amazon.com>, Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>, <arnd@arndb.de>, <pbonzini@redhat.com>, <madvenka@linux.microsoft.com>, Anthony Yznaga <anthony.yznaga@oracle.com>, Usama Arif <usama.arif@bytedance.com>, David Woodhouse <dwmw@amazon.co.uk>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzk@kernel.org> Subject: [PATCH v3 06/17] kexec: Add config option for KHO Date: Wed, 17 Jan 2024 14:46:53 +0000 Message-ID: <20240117144704.602-7-graf@amazon.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240117144704.602-1-graf@amazon.com> References: <20240117144704.602-1-graf@amazon.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: <linux-kernel.vger.kernel.org> List-Subscribe: <mailto:linux-kernel+subscribe@vger.kernel.org> List-Unsubscribe: <mailto:linux-kernel+unsubscribe@vger.kernel.org> MIME-Version: 1.0 X-ClientProxiedBy: EX19D040UWA004.ant.amazon.com (10.13.139.93) To EX19D020UWC004.ant.amazon.com (10.13.138.149) Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1788349523611529698 X-GMAIL-MSGID: 1788349523611529698 |
Series |
kexec: Allow preservation of ftrace buffers
|
|
Commit Message
Alexander Graf
Jan. 17, 2024, 2:46 p.m. UTC
We have all generic code in place now to support Kexec with KHO. This
patch adds a config option that depends on architecture support to
enable KHO support.
Signed-off-by: Alexander Graf <graf@amazon.com>
---
kernel/Kconfig.kexec | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec index 946dffa048b7..6fb5a6ae9697 100644 --- a/kernel/Kconfig.kexec +++ b/kernel/Kconfig.kexec @@ -93,6 +93,19 @@ config KEXEC_JUMP Jump between original kernel and kexeced kernel and invoke code in physical address mode via KEXEC +config KEXEC_KHO + bool "kexec handover" + depends on ARCH_SUPPORTS_KEXEC_KHO + depends on KEXEC + select MEMBLOCK_SCRATCH + select LIBFDT + select CMA + help + Allow kexec to hand over state across kernels by generating and + passing additional metadata to the target kernel. This is useful + to keep data or state alive across the kexec. For this to work, + both source and target kernels need to have this option enabled. + config CRASH_DUMP bool "kernel crash dumps" depends on ARCH_SUPPORTS_CRASH_DUMP