From nobody Mon Apr 6 17:44:17 2026 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1716153027; cv=none; d=zohomail.com; s=zohoarc; b=HRs2gqLMXhmv9TxqT5sfRBMu+yAQ5cceXk/BTGhM9jTV41pZxFYiP5YhUx1r0qWCWvEug0HQaQfCm7HwWhshta/i/ME9VpsVKWx9TU1PsMfd41Q5F8bcBlspQpC+GKJRBgXpJh2y/rjP+tNfIh8+5OFTKAHyGT44IuECmjIzTNM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1716153027; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:Reply-To:References:Sender:Subject:Subject:To:To:Message-Id; bh=Kbp3lWXuKoYK8bc+4BNhpBDv+ayDXaYg3uuzWeL4Agc=; b=LsAtXIgHV8cOO401J1Sng0NhPclC6AKEgmEB24K/PyUXeLq1LXO3PheipDn/zMzlx0pdoJGxHWe9HTxqXS9p6pAsornZDPAUkonivPnSV3eySy7G6uL4bGp/spIDePrNuwztFlq8XEdY1zH2OBuP7Jg8v7qUiswsit8iUekyakA= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1716153027034850.5191602320671; Sun, 19 May 2024 14:10:27 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1s8nn4-0006vy-MR; Sun, 19 May 2024 17:09:58 -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 1s8nn2-0006rM-P8; Sun, 19 May 2024 17:09:56 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1s8nn1-0000Cq-1v; Sun, 19 May 2024 17:09:56 -0400 Received: from mail.maildlp.com (unknown [172.18.186.216]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4VjCxG69TCz6K8y0; Mon, 20 May 2024 05:09:06 +0800 (CST) Received: from lhrpeml500001.china.huawei.com (unknown [7.191.163.213]) by mail.maildlp.com (Postfix) with ESMTPS id DBD1A140736; Mon, 20 May 2024 05:09:52 +0800 (CST) Received: from 00293818-MRGF.china.huawei.com (10.126.174.235) by lhrpeml500001.china.huawei.com (7.191.163.213) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Sun, 19 May 2024 22:09:32 +0100 To: , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Shaoqin Huang Subject: [PATCH V9 6/8] physmem: Add helper function to destroy CPU AddressSpace Date: Sun, 19 May 2024 22:06:18 +0100 Message-ID: <20240519210620.228342-7-salil.mehta@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240519210620.228342-1-salil.mehta@huawei.com> References: <20240519210620.228342-1-salil.mehta@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.126.174.235] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhrpeml500001.china.huawei.com (7.191.163.213) 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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=185.176.79.56; envelope-from=salil.mehta@huawei.com; helo=frasgout.his.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.001, 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: , Reply-to: Salil Mehta From: Salil Mehta via Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZM-MESSAGEID: 1716153028589100003 Content-Type: text/plain; charset="utf-8" Virtual CPU Hot-unplug leads to unrealization of a CPU object. This also involves destruction of the CPU AddressSpace. Add common function to help destroy the CPU AddressSpace. Signed-off-by: Salil Mehta Tested-by: Vishnu Pajjuri Reviewed-by: Gavin Shan Tested-by: Xianglai Li Tested-by: Miguel Luis Reviewed-by: Shaoqin Huang --- include/exec/cpu-common.h | 8 ++++++++ include/hw/core/cpu.h | 1 + system/physmem.c | 29 +++++++++++++++++++++++++++++ 3 files changed, 38 insertions(+) diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 815342d043..240ee04369 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -129,6 +129,14 @@ size_t qemu_ram_pagesize_largest(void); */ void cpu_address_space_init(CPUState *cpu, int asidx, const char *prefix, MemoryRegion *mr); +/** + * cpu_address_space_destroy: + * @cpu: CPU for which address space needs to be destroyed + * @asidx: integer index of this address space + * + * Note that with KVM only one address space is supported. + */ +void cpu_address_space_destroy(CPUState *cpu, int asidx); =20 void cpu_physical_memory_rw(hwaddr addr, void *buf, hwaddr len, bool is_write); diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h index bb398e8237..60b160d0b4 100644 --- a/include/hw/core/cpu.h +++ b/include/hw/core/cpu.h @@ -486,6 +486,7 @@ struct CPUState { QSIMPLEQ_HEAD(, qemu_work_item) work_list; =20 struct CPUAddressSpace *cpu_ases; + int cpu_ases_count; int num_ases; AddressSpace *as; MemoryRegion *memory; diff --git a/system/physmem.c b/system/physmem.c index 342b7a8fd4..146f17826a 100644 --- a/system/physmem.c +++ b/system/physmem.c @@ -763,6 +763,7 @@ void cpu_address_space_init(CPUState *cpu, int asidx, =20 if (!cpu->cpu_ases) { cpu->cpu_ases =3D g_new0(CPUAddressSpace, cpu->num_ases); + cpu->cpu_ases_count =3D cpu->num_ases; } =20 newas =3D &cpu->cpu_ases[asidx]; @@ -776,6 +777,34 @@ void cpu_address_space_init(CPUState *cpu, int asidx, } } =20 +void cpu_address_space_destroy(CPUState *cpu, int asidx) +{ + CPUAddressSpace *cpuas; + + assert(cpu->cpu_ases); + assert(asidx >=3D 0 && asidx < cpu->num_ases); + /* KVM cannot currently support multiple address spaces. */ + assert(asidx =3D=3D 0 || !kvm_enabled()); + + cpuas =3D &cpu->cpu_ases[asidx]; + if (tcg_enabled()) { + memory_listener_unregister(&cpuas->tcg_as_listener); + } + + address_space_destroy(cpuas->as); + g_free_rcu(cpuas->as, rcu); + + if (asidx =3D=3D 0) { + /* reset the convenience alias for address space 0 */ + cpu->as =3D NULL; + } + + if (--cpu->cpu_ases_count =3D=3D 0) { + g_free(cpu->cpu_ases); + cpu->cpu_ases =3D NULL; + } +} + AddressSpace *cpu_get_address_space(CPUState *cpu, int asidx) { /* Return the AddressSpace corresponding to the specified index */ --=20 2.34.1