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[88.187.86.199]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4815f2b1d9bsm1099831f8f.24.2026.08.13.11.18.02 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 13 Aug 2026 11:18:03 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Daniel Henrique Barboza , Paolo Bonzini , Pierrick Bouvier , Mohamed Mediouni , Alexander Graf , qemu-ppc@nongnu.org, qemu-riscv@nongnu.org, kvm@vger.kernel.org, Richard Henderson , qemu-arm@nongnu.org, Magnus Kulke , Peter Maydell , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Palmer Dabbelt , Alistair Francis , Weiwei Li , Liu Zhiwei , Chao Liu Subject: [PATCH 11/16] accel/kvm: Consistently return CPU halt state from process_async_events Date: Thu, 13 Aug 2026 20:16:34 +0200 Message-ID: <20260813181640.6537-12-philmd@oss.qualcomm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260813181640.6537-1-philmd@oss.qualcomm.com> References: <20260813181640.6537-1-philmd@oss.qualcomm.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=ApXeGu9P c=1 sm=1 tr=0 ts=6a7e0a5d cx=c_pps a=mPf7EqFMSY9/WdsSgAYMbA==:117 a=4s3hRJSeHn4rkQlkrse1kQ==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=M51BFTxLslgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=EUspDBNiAAAA:8 a=GGjvRDhnLmMstqdV9EAA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=O8hF6Hzn-FEA:10 a=dawVfQjAaf238kedN5IG:22 X-Proofpoint-ORIG-GUID: Owr0QcqkGrecufOgRWUFz7uj_97zlCoH X-Proofpoint-Spam-Info: AW1haW4tMjYwODEzMDEzMiBTYWx0ZWRfX9EMm2yYg4FnL puiVghlVj8/hDy7FwAB0zEOB7ASVxNu+AoSNdt1rmZt7n5iluM2Fz/A7nuJtuqfjlWkdRi9yWON 8JNMcd4hGQC5BXe9OJf1CvAKsxuLAwA= X-Proofpoint-GUID: Owr0QcqkGrecufOgRWUFz7uj_97zlCoH X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODEzMDEzMiBTYWx0ZWRfX7fDk7AkeZxRh TBtwx4vzeM+4Ae/Wlk6/ynNYvUBykP50ZsKVtZ4KVq0djkop7u9Qglm9deXD1yvgrZOsqlKA19t InxVkGR+q6boeG5AGtalM3g4sEZY1g0moHAVzinJm6VYRZ0ruqCSSC380+VWvVrbWeAn4Q97KpX XdjOaA59Dobl9IN3Ty94H+RrhLgF/s790y0MeftEQbkRBiSMaZlmJRkESKZQgMhmE7fHKwH2GM+ xn3H4gQUrbYFjHVduYV9JgzNOGYsuFMPdWkwXghRH6b8I0tG2ZRTBYlljzxxvDePjS4zjvJ8bSd 3DQNHhTu1ZuNG3QEj/AOHG8bP9nrx5Z+OBwH4g0KyK6GWrcD8Ph56PuG/JGlXmb+x8y4WDaV2Pm aT1vlmhL1f9dZAKOvyZMDmd0TW/WIAKJO8pP0Z0N6MZU+8Y4w0g50XkbhHR8lc8dajmREVmF7ws NpwZAhzpUpiX/XYWI0A== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-13_05,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 impostorscore=0 clxscore=1015 adultscore=0 suspectscore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608130132 When comparing the KVM implementations, RISCV and ARM differ from S390x / PPC and LoongArch. The caller expects a non-zero value to return pausing execution with the EXCP_HLT exception: 3427 int kvm_cpu_exec(CPUState *cpu) 3428 { ... 3434 if (kvm_arch_process_async_events(cpu)) { 3435 return EXCP_HLT; 3436 } 3437 3438 bql_unlock(); 3439 cpu_exec_start(cpu); 3440 3441 /* Inner vCPU loop */ 3442 do { ... Change ARM and RISC-V to return cs->halted for consistent behavior. Signed-off-by: Philippe Mathieu-Daudé --- target/arm/kvm.c | 2 +- target/riscv/kvm/kvm-cpu.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/target/arm/kvm.c b/target/arm/kvm.c index d40a6a98591..5caabfab63f 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -1575,7 +1575,7 @@ bool kvm_arch_stop_on_emulation_error(CPUState *cs) int kvm_arch_process_async_events(CPUState *cs) { - return 0; + return cs->halted; } /** diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c index 97069bf597a..1a61cd5ef37 100644 --- a/target/riscv/kvm/kvm-cpu.c +++ b/target/riscv/kvm/kvm-cpu.c @@ -1568,7 +1568,7 @@ int kvm_arch_irqchip_create(KVMState *s) int kvm_arch_process_async_events(CPUState *cs) { - return 0; + return cs->halted; } void kvm_arch_pre_run(CPUState *cs, struct kvm_run *run) -- 2.53.0