From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists1p.gnu.org (lists1p.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 AEB0DC5516D for ; Fri, 31 Jul 2026 06:00:32 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wpgFe-0002hL-P6; Fri, 31 Jul 2026 01:57:46 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wpeMA-0005v1-EM; Thu, 30 Jul 2026 23:56:22 -0400 Received: from [115.124.30.110] (helo=out30-110.freemail.mail.aliyun.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wpeM8-0002Jd-Mp; Thu, 30 Jul 2026 23:56:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1785470176; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=g1senpRrIBKAyuBFOowp2ZlL3plOZU6OwVUYin/8o/Q=; b=U6TV8DUNGzMY4fCtIN1BHCZsyDf8bPLDMNrxQhQIcXBTMMp2Xx35fOmIVLd5GXyUUJBe5ALQQUsDAfKpDloFkM+nmoNWBjllAevF0ZX2LYxlEOK6gbSh/oZTUmjS1NqJABQyOrxkMnH1vTHLhNpFu4PV2uHy9am1IaDLUasVA9E= X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R701e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=maildocker-contentspam033032089153; MF=blduan@linux.alibaba.com; NM=1; PH=DS; RN=7; SR=0; TI=SMTPD_---0X86jwXT_1785469863; Received: from ea134-sw16.eng.xrvm.cn(mailfrom:blduan@linux.alibaba.com fp:SMTPD_---0X86jwXT_1785469863 cluster:ay36) by smtp.aliyun-inc.com; Fri, 31 Jul 2026 11:51:04 +0800 From: Baolong Duan To: qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, alistair23@gmail.com, dbarboza@ventanamicro.com, cxx194832@alibaba-inc.com, zengxiangyi.zxy@alibaba-inc.com, Baolong Duan Subject: [RFC PATCH v1 16/17] accel/kvm: terminate on a system event of a CoVE guest Date: Fri, 31 Jul 2026 11:50:10 +0800 Message-Id: <20260731035011.4178103-17-blduan@linux.alibaba.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260731035011.4178103-1-blduan@linux.alibaba.com> References: <20260731035011.4178103-1-blduan@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 115.124.30.110 (deferred) Received-SPF: pass client-ip=115.124.30.110; envelope-from=blduan@linux.alibaba.com; helo=out30-110.freemail.mail.aliyun.com X-Spam_score_int: -166 X-Spam_score: -16.7 X-Spam_bar: ---------------- X-Spam_report: (-16.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001, USER_IN_DEF_DKIM_WL=-7.5, USER_IN_DEF_SPF_WL=-7.5 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Fri, 31 Jul 2026 01:57:33 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development 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 The TSM does not honour a power off request for a TEE VM: the vCPU re-enters KVM_RUN and reports the same system event again, so QEMU never shuts the guest down. Terminate the process instead. This works around a missing piece of the TSM ABI rather than something QEMU should be doing. Signed-off-by: Baolong Duan --- accel/kvm/kvm-all.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 7b33a9aa3a..938bbebcd1 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -3613,6 +3613,17 @@ int kvm_cpu_exec(CPUState *cpu) break; case KVM_EXIT_SYSTEM_EVENT: trace_kvm_run_exit_system_event(cpu->cpu_index, run->system_event.type); + /* + * The TSM does not honour power_off for a TVM: the vCPU would + * re-enter KVM_RUN and report the same event forever, so + * terminate QEMU right away. + */ + if (riscv_cove_vm_active()) { + warn_report("CoVE VM: system event %d, terminating", + run->system_event.type); + exit(run->system_event.type == KVM_SYSTEM_EVENT_SHUTDOWN ? + 0 : 1); + } switch (run->system_event.type) { case KVM_SYSTEM_EVENT_SHUTDOWN: qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); -- 2.34.1