From patchwork Mon Jul 31 16:21:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 13335004 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EE15CC001DE for ; Mon, 31 Jul 2023 16:32:50 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qQVoz-0001nG-Re; Mon, 31 Jul 2023 12:32:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qQVox-0001mE-Us for qemu-devel@nongnu.org; Mon, 31 Jul 2023 12:32:35 -0400 Received: from [134.134.136.126] (helo=mgamail.intel.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qQVow-00010F-AB for qemu-devel@nongnu.org; Mon, 31 Jul 2023 12:32:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690821154; x=1722357154; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=aL1UPlr2chE5l10fcGzhJ5ApDBOAfrYAdLTB07kHh9c=; b=bdXRp/IzbDMJ2qRGcA7gxB9FbfO6oh9Mh4zfLfXuUZMZaDELkv4HjSA2 IHN1AcLZu6d7wU70g5NxQzGt/tJ8dwL+4yNb6JxaqxaFY6wiM1T1VyGuO CDFgAN1AsMRdnnoUwW4RNMCKi0BZH/B8dRg90w9M2zuNXMmI80UXHloPu L3Wh2rW1ojkMg++oz8G+Brqe9ZDba94K41CoX5y31NU+7dQ8ysgUd9OiD IypRLboS0tsFn2Wwiyoa+NROO5ieuKcHQ1pui5BA0ExjGvHBqYTrPRzkv OPWo5sFrBvnLRwoN1y3zk7eUVTUk+mH6iAgsFsdH0WMCiUtAWe23hhR+L A==; X-IronPort-AV: E=McAfee;i="6600,9927,10788"; a="353993416" X-IronPort-AV: E=Sophos;i="6.01,244,1684825200"; d="scan'208";a="353993416" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Jul 2023 09:25:10 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10788"; a="757984060" X-IronPort-AV: E=Sophos;i="6.01,244,1684825200"; d="scan'208";a="757984060" Received: from lxy-clx-4s.sh.intel.com ([10.239.48.46]) by orsmga008.jf.intel.com with ESMTP; 31 Jul 2023 09:25:05 -0700 From: Xiaoyao Li To: Paolo Bonzini , Sean Christopherson , David Hildenbrand , Igor Mammedov , "Michael S. Tsirkin" , Marcel Apfelbaum , Richard Henderson , Marcelo Tosatti Cc: Markus Armbruster , Eric Blake , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , =?utf-8?q?Phil?= =?utf-8?q?ippe_Mathieu-Daud=C3=A9?= , Peter Xu , Chao Peng , Michael Roth , isaku.yamahata@gmail.com, xiaoyao.li@intel.com, qemu-devel@nongnu.org, kvm@vger.kernel.org Subject: [RFC PATCH 04/19] memory: Introduce memory_region_can_be_private() Date: Mon, 31 Jul 2023 12:21:46 -0400 Message-Id: <20230731162201.271114-5-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230731162201.271114-1-xiaoyao.li@intel.com> References: <20230731162201.271114-1-xiaoyao.li@intel.com> MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 134.134.136.126 (failed) Received-SPF: pass client-ip=134.134.136.126; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -12 X-Spam_score: -1.3 X-Spam_bar: - X-Spam_report: (-1.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Signed-off-by: Xiaoyao Li --- include/exec/memory.h | 9 +++++++++ softmmu/memory.c | 5 +++++ 2 files changed, 14 insertions(+) diff --git a/include/exec/memory.h b/include/exec/memory.h index 61e31c7b9874..e119d3ce1a1d 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -1679,6 +1679,15 @@ static inline bool memory_region_is_romd(MemoryRegion *mr) */ bool memory_region_is_protected(MemoryRegion *mr); +/** + * memory_region_can_be_private: check whether a memory region can be private + * + * Returns %true if a memory region's ram_block has valid gmem fd assigned. + * + * @mr: the memory region being queried + */ +bool memory_region_can_be_private(MemoryRegion *mr); + /** * memory_region_get_iommu: check whether a memory region is an iommu * diff --git a/softmmu/memory.c b/softmmu/memory.c index 4f8f8c0a02e6..336c76ede660 100644 --- a/softmmu/memory.c +++ b/softmmu/memory.c @@ -1855,6 +1855,11 @@ bool memory_region_is_protected(MemoryRegion *mr) return mr->ram && (mr->ram_block->flags & RAM_PROTECTED); } +bool memory_region_can_be_private(MemoryRegion *mr) +{ + return mr->ram_block && mr->ram_block->gmem_fd >= 0; +} + uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr) { uint8_t mask = mr->dirty_log_mask;