From patchwork Fri Jan 19 14:52:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoquan He X-Patchwork-Id: 13523891 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 CF0435475D for ; Fri, 19 Jan 2024 14:53:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705676019; cv=none; b=ejiOeHHUrRHjfVABGWCJUFgMu9PbZP0BZsCVAw0JWBSgaMmLyELbeq4AvxUfIR/lWVDC4gTn2sbkrTTSLH7CkW9BBA3s8mivd05UnT0CAhKGlHI6LiEjqGZRxeGPoxjv4odz5boXchtQjTiHD4mvHVir48nBuTwsoCqCYobaU2E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705676019; c=relaxed/simple; bh=hFskVw87Sdr8raPjNAxR5rfjJTmG9iVV6lVF91D6qJA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=Gl7qcfg3d6s47dB9c1s3AOV37RdzcfCy/kt8Kc7BXx5w615LPwpGeDEq61g0UZIJA/PA0fMXZIlc1nh0xJYJap44Xix5tWotkAGieyzwdnfpTNCUQMXwT9LNECLZE1onNNh39Bjkq3Bx3YOoKmQQ+/GmoFOA87eEd/TVqYDF9GU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=CiWvqOvd; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="CiWvqOvd" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1705676016; h=from:from: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=idAf8C8vEaEPhamo8i8Q+7QtJLmbWmmoc+K4mQqU0s4=; b=CiWvqOvdVDuxq/SFijqkMpLo7l0AGGHXOguTDvs9luwrHdqfTfgYgTANSedGfTUfZ8R8m7 m6jluDBDrjLZYTk1rftFj6VBR8IGa2O+1SyNatlL6k2qFuHYnI9GFAVKiyX7kRJFHRoqSy lFfpX3RgKUMLeQWV+KM/vteNHAqmdNs= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-184-YH3KIHVePGC9OEG05Qcb4A-1; Fri, 19 Jan 2024 09:53:33 -0500 X-MC-Unique: YH3KIHVePGC9OEG05Qcb4A-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id A44A81C54032; Fri, 19 Jan 2024 14:53:32 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.116.4]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9DE6951D5; Fri, 19 Jan 2024 14:53:26 +0000 (UTC) From: Baoquan He To: linux-kernel@vger.kernel.org Cc: kexec@lists.infradead.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org, loongarch@lists.linux.dev, akpm@linux-foundation.org, ebiederm@xmission.com, hbathini@linux.ibm.com, piliu@redhat.com, viro@zeniv.linux.org.uk, Baoquan He Subject: [PATCH v2 05/14] crash: clean up kdump related config items Date: Fri, 19 Jan 2024 22:52:32 +0800 Message-ID: <20240119145241.769622-6-bhe@redhat.com> In-Reply-To: <20240119145241.769622-1-bhe@redhat.com> References: <20240119145241.769622-1-bhe@redhat.com> Precedence: bulk X-Mailing-List: linux-mips@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.5 By splitting CRASH_RESERVE and VMCORE_INFO out from CRASH_CORE, cleaning up the dependency of FA_DMUMP on CRASH_DUMP, and moving crash codes from kexec_core.c to crash_core.c, now we can rearrange CRASH_DUMP to depend on KEXEC_CORE, and make CRASH_DUMP select CRASH_RESERVE and VMCORE_INFO. KEXEC_CORE won't select CRASH_RESERVE and VMCORE_INFO any more because KEXEC_CORE enables codes which allocate control pages, copy kexec/kdump segments, and prepare for switching. These codes are shared by both kexec reboot and crash dumping. Doing this makes codes and the corresponding config items more logical (the right item depends on or is selected by the left item). PROC_KCORE -----------> VMCORE_INFO |----------> VMCORE_INFO FA_DUMP----| |----------> CRASH_RESERVE ---->VMCORE_INFO / |---->CRASH_RESERVE KEXEC --| /| |--> KEXEC_CORE--> CRASH_DUMP-->/-|---->PROC_VMCORE KEXEC_FILE --| \ | \---->CRASH_HOTPLUG KEXEC --| |--> KEXEC_CORE--> kexec reboot KEXEC_FILE --| Signed-off-by: Baoquan He --- kernel/Kconfig.kexec | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec index 8faf27043432..6c34e63c88ff 100644 --- a/kernel/Kconfig.kexec +++ b/kernel/Kconfig.kexec @@ -9,8 +9,6 @@ config VMCORE_INFO bool config KEXEC_CORE - select VMCORE_INFO - select CRASH_RESERVE bool config KEXEC_ELF @@ -99,8 +97,11 @@ config KEXEC_JUMP config CRASH_DUMP bool "kernel crash dumps" + default y depends on ARCH_SUPPORTS_CRASH_DUMP - select KEXEC_CORE + depends on KEXEC_CORE + select VMCORE_INFO + select CRASH_RESERVE help Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels