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a="30753988" X-IronPort-AV: E=Sophos;i="6.09,235,1716274800"; d="scan'208";a="30753988" X-CSE-ConnectionGUID: gFgeME1KR7eAyTzj7cKk1A== X-CSE-MsgGUID: xo48P9PiTWaGNySerO1iQA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.09,235,1716274800"; d="scan'208";a="52858168" From: Chenyi Qiang To: Paolo Bonzini , David Hildenbrand , Peter Xu , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Michael Roth Cc: Chenyi Qiang , qemu-devel@nongnu.org, kvm@vger.kernel.org, Williams Dan J , Edgecombe Rick P , Wang Wei W , Peng Chao P , Gao Chao , Wu Hao , Xu Yilun Subject: [RFC PATCH 4/6] memory: Register the RamDiscardManager instance upon guest_memfd creation Date: Thu, 25 Jul 2024 03:21:13 -0400 Message-ID: <20240725072118.358923-5-chenyi.qiang@intel.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20240725072118.358923-1-chenyi.qiang@intel.com> References: <20240725072118.358923-1-chenyi.qiang@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=198.175.65.13; envelope-from=chenyi.qiang@intel.com; helo=mgamail.intel.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.136, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1721892273566116600 Content-Type: text/plain; charset="utf-8" Instantiate a new guest_memfd_manager object and register it in the target MemoryRegion. From this point, other subsystems such as VFIO can register their listeners in guest_memfd_manager and receive conversion events through RamDiscardManager. Signed-off-by: Chenyi Qiang --- system/physmem.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/system/physmem.c b/system/physmem.c index 33d09f7571..98072ae246 100644 --- a/system/physmem.c +++ b/system/physmem.c @@ -53,6 +53,7 @@ #include "sysemu/hostmem.h" #include "sysemu/hw_accel.h" #include "sysemu/xen-mapcache.h" +#include "sysemu/guest-memfd-manager.h" #include "trace/trace-root.h" =20 #ifdef CONFIG_FALLOCATE_PUNCH_HOLE @@ -1861,6 +1862,12 @@ static void ram_block_add(RAMBlock *new_block, Error= **errp) qemu_mutex_unlock_ramlist(); goto out_free; } + + GuestMemfdManager *gmm =3D GUEST_MEMFD_MANAGER(object_new(TYPE_GUE= ST_MEMFD_MANAGER)); + GuestMemfdManagerClass *gmmc =3D GUEST_MEMFD_MANAGER_GET_CLASS(gmm= ); + g_assert(new_block->mr); + gmmc->realize(OBJECT(gmm), new_block->mr, new_block->mr->size); + memory_region_set_ram_discard_manager(gmm->mr, RAM_DISCARD_MANAGER= (gmm)); } =20 new_ram_size =3D MAX(old_ram_size, @@ -2118,6 +2125,8 @@ static void reclaim_ramblock(RAMBlock *block) =20 if (block->guest_memfd >=3D 0) { close(block->guest_memfd); + g_assert(block->mr); + object_unref(OBJECT(block->mr->rdm)); ram_block_discard_require(false); } =20 --=20 2.43.5