From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 C989272636 for ; Sat, 24 May 2025 10:16:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748081772; cv=none; b=oAd1xHX0bxq+d1HDF13w/yuZsXsTW5YGXfJaAOnKTnSurqb8UXAT7JoJkuSPBMvQmA9wm+B4yfWLSh7tNonFQ0dhVuZl1GECMnGpz1BUYMjVNUXESQ7ZuIHWCP79yMrwd3OpF27Nbya0+nod6blQC1IiWUTTrt5SwESwcWIuvGU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748081772; c=relaxed/simple; bh=GIxFoPZz5ueMonYSdDex37mR6oZlB2tlntAwkwyH2F0=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=szqMCHG2BdqfXeKFbFgRe/3/ne62436zPiEsUXJ+A3Tcyx+qaPx5AclDkwHGHYCzKj1Gv8TVca3l/Hi851cbDoeW5iVervHxddE/q8lieDi9PcO4gkuAzxv6HZ7TE5EemTS57+kukm4iF21kK8QX2sOVWyrZtZeYD7V0QTrbhjw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=desiato.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=bhm/XRsq; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=desiato.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="bhm/XRsq" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=MIME-Version:Content-Type:References: In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=Nr/9cyP3AAAIOM+yjMOJAkiHx7hEWeAmLRQYGDbGOew=; b=bhm/XRsq1dAt0EWsgF/mz3aLTV IhRsZsTfCa/3vel3pdfBGmJCYqFX06ZECNBqum+5D72ZTLNeqQ5anj0yMAcOYA1jmyq19lL+1iT3D uChm7yxzmmriW25IQL/uUPWmiPTHMiOfPOEeX3EZqjK7NO4AZO5wrFsKFduiCGINOZvf4YRHuPUpT bpQr6Vj8BkNwxv75/6UGVHOsVJ5c0ZzIWxzFu37nyTwOBu7awUoJlVolJL2vVRYiCPgSLpkxd87iD 7rjhvXYuIGtug6O2Gheo5/jzbUtNrfU+U8tLESJqNrYdXhRnOC/E2SMPaTZ18DRhaP6AiDiUOqNTP 37t643NA==; Received: from [172.31.31.140] (helo=u09cd745991455d.lumleys.internal) by desiato.infradead.org with esmtpsa (Exim 4.98.1 #2 (Red Hat Linux)) id 1uIlvA-00000001RVK-3vms; Sat, 24 May 2025 10:16:06 +0000 Message-ID: <0fac5973d5588ee441ae95384d2edda69989ac10.camel@infradead.org> Subject: Re: [PATCH] kexec: Enable CMA based contiguous allocation From: David Woodhouse To: Alexander Graf , kexec@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Andrew Morton , Baoquan He , Pasha Tatashin , nh-open-source@amazon.com Date: Sat, 24 May 2025 11:16:03 +0100 In-Reply-To: <20250512225752.11687-1-graf@amazon.com> References: <20250512225752.11687-1-graf@amazon.com> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/pkcs7-signature"; boundary="=-fj1w5lea6+G9XhUWzavE" User-Agent: Evolution 3.52.3-0ubuntu1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html --=-fj1w5lea6+G9XhUWzavE Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, 2025-05-12 at 22:57 +0000, Alexander Graf wrote: >=20 > --- a/include/uapi/linux/kexec.h > +++ b/include/uapi/linux/kexec.h > @@ -27,6 +27,7 @@ > =C2=A0#define KEXEC_FILE_ON_CRASH 0x00000002 > =C2=A0#define KEXEC_FILE_NO_INITRAMFS 0x00000004 > =C2=A0#define KEXEC_FILE_DEBUG 0x00000008 > +#define KEXEC_FILE_NO_CMA 0x00000010 > =C2=A0 Gives me EINVAL when I try to use it. This helps (but should it be permitted only on architectures which implement it?): --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -385,7 +385,7 @@ extern int kexec_load_disabled; /* List of defined/legal kexec file flags */ #define KEXEC_FILE_FLAGS (KEXEC_FILE_UNLOAD | KEXEC_FILE_ON_CRASH | = \ KEXEC_FILE_NO_INITRAMFS | \ - KEXEC_FILE_COOPERATIVE) + KEXEC_FILE_COOPERATIVE | KEXEC_FILE_NO_CMA= ) =20 /* Location of a reserved region to hold the crash kernel. */ --=-fj1w5lea6+G9XhUWzavE Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCD9Aw ggSOMIIDdqADAgECAhAOmiw0ECVD4cWj5DqVrT9PMA0GCSqGSIb3DQEBCwUAMGUxCzAJBgNVBAYT AlVTMRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5jb20xJDAi BgNVBAMTG0RpZ2lDZXJ0IEFzc3VyZWQgSUQgUm9vdCBDQTAeFw0yNDAxMzAwMDAwMDBaFw0zMTEx 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