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[110.175.65.7]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2bd7f0cd400sm2514953a91.31.2024.05.20.18.30.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 May 2024 18:30:41 -0700 (PDT) From: Nicholas Piggin To: qemu-ppc@nongnu.org Cc: Nicholas Piggin , qemu-devel@nongnu.org, Daniel Henrique Barboza , Glenn Miles , Richard Henderson , Chinmay Rath Subject: [PATCH v2 01/12] target/ppc: Make checkstop actually stop the system Date: Tue, 21 May 2024 11:30:17 +1000 Message-ID: <20240521013029.30082-2-npiggin@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240521013029.30082-1-npiggin@gmail.com> References: <20240521013029.30082-1-npiggin@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::633; envelope-from=npiggin@gmail.com; helo=mail-pl1-x633.google.com 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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org checkstop state does not halt the system, interrupts continue to be serviced, and other CPUs run. Make it stop the machine with qemu_system_guest_panicked. Signed-off-by: Nicholas Piggin Reviewed-by: Glenn Miles --- target/ppc/excp_helper.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c index 3be086d10b..b2b51537b7 100644 --- a/target/ppc/excp_helper.c +++ b/target/ppc/excp_helper.c @@ -19,6 +19,8 @@ #include "qemu/osdep.h" #include "qemu/main-loop.h" #include "qemu/log.h" +#include "sysemu/sysemu.h" +#include "sysemu/runstate.h" #include "cpu.h" #include "exec/exec-all.h" #include "internal.h" @@ -425,6 +427,8 @@ static void powerpc_set_excp_state(PowerPCCPU *cpu, target_ulong vector, static void powerpc_mcheck_checkstop(CPUPPCState *env) { + /* KVM guests always have MSR[ME] enabled */ +#ifdef CONFIG_TCG CPUState *cs = env_cpu(env); if (FIELD_EX64(env->msr, MSR, ME)) { @@ -437,9 +441,15 @@ static void powerpc_mcheck_checkstop(CPUPPCState *env) if (qemu_log_separate()) { qemu_log("Machine check while not allowed. " "Entering checkstop state\n"); - } - cs->halted = 1; - cpu_interrupt_exittb(cs); + + /* + * This stops the machine and logs CPU state without killing QEMU + * (like cpu_abort()) so the machine can still be debugged (because + * it is often a guest error). + */ + qemu_system_guest_panicked(NULL); + cpu_loop_exit_noexc(cs); +#endif } static void powerpc_excp_40x(PowerPCCPU *cpu, int excp)