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b=GGgHS3Kt0AIK/5DbWPzORQ/YD4s6TCH4qu2Tg4A+T5/1nsVjVkddx4eFodJThfCssZgl6R G8M/SX8coZmgpaHEp3FplOZzJ5Rl6x9HsJZwoUGlFy3N8RBKLGhpQ5Jg3OsEMEHRXFKTWD Tn+xiOY9IaDzqcF2L+gWAkExufLo3AU= X-MC-Unique: OZKtK-JhPj2O7Gc86mdgnA-1 From: Igor Mammedov To: qemu-devel@nongnu.org Subject: [PATCH 2/2] numa: prevent usage of -M memory-backend and -numa memdev at the same time Date: Mon, 11 May 2020 10:11:03 -0400 Message-Id: <20200511141103.43768-3-imammedo@redhat.com> In-Reply-To: <20200511141103.43768-1-imammedo@redhat.com> References: <20200511141103.43768-1-imammedo@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com 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=205.139.110.120; envelope-from=imammedo@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/11 00:05:06 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, ehabkost@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Options -M memory-backend and -numa memdev are mutually exclusive, and if used together, it might lead to a crash in the worst case. For example when the same backend is used with these options together: -m 4G \ -object memory-backend-ram,id=3Dmem0,size=3D4G \ -M pc,memory-backend=3Dmem0 \ -numa node,memdev=3Dmem0 QEMU will abort with: exec.c:2006: qemu_ram_set_idstr: Assertion `!new_block->idstr[0]' failed. and following backtrace: abort () qemu_ram_set_idstr () vmstate_register_ram () vmstate_register_ram_global () machine_consume_memdev () numa_init_memdev_container () numa_complete_configuration () machine_run_board_init () add a check to error out in case the user tries to use both options at the same time. Signed-off-by: Igor Mammedov --- hw/core/numa.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/core/numa.c b/hw/core/numa.c index 316bc50d75..5f81900f88 100644 --- a/hw/core/numa.c +++ b/hw/core/numa.c @@ -757,6 +757,11 @@ void numa_complete_configuration(MachineState *ms) } =20 if (!numa_uses_legacy_mem() && mc->default_ram_id) { + if (ms->ram_memdev_id) { + error_report("'-machine memory-backend' and '-numa memdev'" + " properties are mutually exclusive"); + exit(1); + } ms->ram =3D g_new(MemoryRegion, 1); memory_region_init(ms->ram, OBJECT(ms), mc->default_ram_id, ram_size); --=20 2.18.4