From nobody Mon Feb 9 12:14:23 2026 Delivered-To: importer@patchew.org Received-SPF: none (zohomail.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; spf=none (zohomail.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=fail(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1579629062; cv=none; d=zohomail.com; s=zohoarc; b=gx/MGb5jn5YBu5X/2EHJbVHGpSv/T7E6H7kR9QW+7rSPIvnnBm9nzUMWZm+t+z7WUW4cG9SWAqGGTfPoIi14Hqxj5+2yuoiH+v+ryTIcPMovQmg4jYY9wTBQhXIhvjOB+wosfvMK3rlyZJNQbfr2mIMK/IPHhY644eZDOYsDSaw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1579629062; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=t3glcWRtjyoLyzoUnOsgne/oJ0n3m2XLoHhYqroxCX4=; b=MPEflCXO6M9sRzqp/rR6LCwVEqsrZem+r0BsuGPj1v/gqq1Hp5aUd7YmN7Rvh7LojmGfhFi5d0cwVH0MlFpqN2EJ4i93fTcUWPttyTFE5HukMtm8JO/vhXgyulCrvdSuC0Q2omhMZGQfUdSGpVKc9CS8m+bHgL2KbVMaernBiSI= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=none (zohomail.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1579629062313864.0275492475275; Tue, 21 Jan 2020 09:51:02 -0800 (PST) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1itxfS-0004et-1j; Tue, 21 Jan 2020 17:50:22 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1itxfR-0004eU-Gw for xen-devel@lists.xenproject.org; Tue, 21 Jan 2020 17:50:21 +0000 Received: from mga04.intel.com (unknown [192.55.52.120]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 79141b7c-3c76-11ea-aecd-bc764e2007e4; Tue, 21 Jan 2020 17:50:12 +0000 (UTC) Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Jan 2020 09:50:04 -0800 Received: from tlengyel-mobl2.amr.corp.intel.com (HELO localhost.localdomain) ([10.251.23.127]) by orsmga006.jf.intel.com with ESMTP; 21 Jan 2020 09:50:03 -0800 X-Inumbo-ID: 79141b7c-3c76-11ea-aecd-bc764e2007e4 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,346,1574150400"; d="scan'208";a="228929173" From: Tamas K Lengyel To: xen-devel@lists.xenproject.org Date: Tue, 21 Jan 2020 09:49:41 -0800 Message-Id: X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 Subject: [Xen-devel] [PATCH v5 08/18] x86/mem_sharing: Use INVALID_MFN and p2m_is_shared in relinquish_shared_pages X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Tamas K Lengyel , Tamas K Lengyel , Wei Liu , George Dunlap , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" While using _mfn(0) is of no consequence during teardown, INVALID_MFN is the correct value that should be used. Signed-off-by: Tamas K Lengyel Reviewed-by: Jan Beulich --- xen/arch/x86/mm/mem_sharing.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/xen/arch/x86/mm/mem_sharing.c b/xen/arch/x86/mm/mem_sharing.c index 1846f97acc..cc3fc97618 100644 --- a/xen/arch/x86/mm/mem_sharing.c +++ b/xen/arch/x86/mm/mem_sharing.c @@ -1314,7 +1314,7 @@ int relinquish_shared_pages(struct domain *d) break; =20 mfn =3D p2m->get_entry(p2m, _gfn(gfn), &t, &a, 0, NULL, NULL); - if ( mfn_valid(mfn) && t =3D=3D p2m_ram_shared ) + if ( mfn_valid(mfn) && p2m_is_shared(t) ) { /* Does not fail with ENOMEM given the DESTROY flag */ BUG_ON(__mem_sharing_unshare_page( @@ -1324,7 +1324,7 @@ int relinquish_shared_pages(struct domain *d) * unshare. Must succeed: we just read the old entry and * we hold the p2m lock. */ - set_rc =3D p2m->set_entry(p2m, _gfn(gfn), _mfn(0), PAGE_ORDER_= 4K, + set_rc =3D p2m->set_entry(p2m, _gfn(gfn), INVALID_MFN, PAGE_OR= DER_4K, p2m_invalid, p2m_access_rwx, -1); ASSERT(!set_rc); count +=3D 0x10; --=20 2.20.1 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel