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GET /api/1.0/patches/2221122/?format=api
{ "id": 2221122, "url": "http://patchwork.ozlabs.org/api/1.0/patches/2221122/?format=api", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.0/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260408041953.1899532-6-brian.cain@oss.qualcomm.com>", "date": "2026-04-08T04:19:30", "name": "[v4,05/28] target/hexagon: Implement wait helper", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c6c994dac3fd41dd9b7653489affc6ef2e96b387", "submitter": { "id": 89839, "url": "http://patchwork.ozlabs.org/api/1.0/people/89839/?format=api", "name": "Brian Cain", "email": "brian.cain@oss.qualcomm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260408041953.1899532-6-brian.cain@oss.qualcomm.com/mbox/", "series": [ { "id": 499179, "url": "http://patchwork.ozlabs.org/api/1.0/series/499179/?format=api", "date": "2026-04-08T04:19:31", "name": "Hexagon system emulation - Part 2/3", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/499179/mbox/" } ], "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2221122/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=pD8uVQnG;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=Dy0sQR3Q;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "X-Authority-Analysis": "v=2.4 cv=drPrzVg4 c=1 sm=1 tr=0 ts=69d5d77e cx=c_pps\n a=Uww141gWH0fZj/3QKPojxA==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17\n a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10\n a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22\n a=COk6AnOGAAAA:8 a=pGLkceISAAAA:8 a=EUspDBNiAAAA:8 a=UWtQ3YZIe0Xef7kIUYIA:9\n a=QEXdDO2ut3YA:10 a=PxkB5W3o20Ba91AHUih5:22 a=TjNXssC_j7lpFel5tvFf:22", "X-Proofpoint-ORIG-GUID": "mC-DEzHI51w1bzGme9gVkDUetycQ2t2G", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDA4MDAzNiBTYWx0ZWRfX8LLNzwR6iNuV\n lkdHxfjs3cUmW1C8ZI+Hsvpxu8sZaaVMQKTP8HqzcEaI8U245K1SisEOYuXK7sZnOSrVRBA2VxL\n NjDHwtUbt/meERielFcKo6bLGSPFV772SJy67eZwwS5UyAcPmmUINym9IINmh6FPVTL2NcYifoZ\n YHu2iogVXQiDZR8yLnqSY3dH2j9DlfRqpVxFWYMfMn473bA3w3CozWUQVlF7CdhgY8zxSki6H6u\n 1aDLAA496+BfANozH4Ep9vE0eWFOTP7Mztf648TER1fk32NDoX1uRgE/if9V5Z8i7tpLESp4ACg\n cEmfRZWVhgEXStdbIWSr/HWDblM0y3q/iwAzCYTFIRvXCysxlF/UQyVKe4DVeseslYNG7fYlGei\n NMu2uDrd7Lszz3It66DenzCr/qna9fDG0CTwlLaGZFcTOUjBbEaxQpCwSuS5CYG7fdb+1UlIzrN\n Ti8iSlnmEY5kMG3FNUg==", "X-Proofpoint-GUID": "mC-DEzHI51w1bzGme9gVkDUetycQ2t2G", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-08_02,2026-04-07_05,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n adultscore=0 lowpriorityscore=0 spamscore=0 clxscore=1015 malwarescore=0\n bulkscore=0 impostorscore=0 phishscore=0 priorityscore=1501 suspectscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604080036", "Received-SPF": "pass client-ip=205.220.168.131;\n envelope-from=brian.cain@oss.qualcomm.com; helo=mx0a-0031df01.pphosted.com", "X-Spam_score_int": "-27", "X-Spam_score": "-2.8", "X-Spam_bar": "--", "X-Spam_report": "(-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001,\n RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001,\n 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": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "From: Brian Cain <bcain@quicinc.com>\n\nReviewed-by: Taylor Simpson <ltaylorsimpson@gmail.com>\nSigned-off-by: Brian Cain <brian.cain@oss.qualcomm.com>\n---\n target/hexagon/op_helper.c | 60 ++++++++++++++++++++++++++++++++++++--\n 1 file changed, 58 insertions(+), 2 deletions(-)", "diff": "diff --git a/target/hexagon/op_helper.c b/target/hexagon/op_helper.c\nindex 235c70f7370..d40061de06e 100644\n--- a/target/hexagon/op_helper.c\n+++ b/target/hexagon/op_helper.c\n@@ -1486,9 +1486,65 @@ void HELPER(stop)(CPUHexagonState *env)\n hexagon_stop_thread(env);\n }\n \n-void HELPER(wait)(CPUHexagonState *env, target_ulong PC)\n+static void set_wait_mode(CPUHexagonState *env)\n {\n- g_assert_not_reached();\n+ HexagonCPU *cpu;\n+ uint32_t modectl;\n+ uint32_t thread_wait_mask;\n+\n+ g_assert(bql_locked());\n+\n+ cpu = env_archcpu(env);\n+ if (!cpu->globalregs) {\n+ return;\n+ }\n+ modectl =\n+ hexagon_globalreg_read(cpu->globalregs, HEX_SREG_MODECTL,\n+ env->threadId);\n+ thread_wait_mask = GET_FIELD(MODECTL_W, modectl);\n+ thread_wait_mask |= 0x1 << env->threadId;\n+ SET_SYSTEM_FIELD(env, HEX_SREG_MODECTL, MODECTL_W, thread_wait_mask);\n+}\n+\n+static void hexagon_wait_thread(CPUHexagonState *env, uint32_t PC)\n+{\n+ CPUState *cs;\n+\n+ g_assert(bql_locked());\n+\n+ if (qemu_loglevel_mask(LOG_GUEST_ERROR) &&\n+ (env->k0_lock_state != HEX_LOCK_UNLOCKED ||\n+ env->tlb_lock_state != HEX_LOCK_UNLOCKED)) {\n+ qemu_log(\"WARNING: executing wait() with acquired lock\"\n+ \"may lead to deadlock\\n\");\n+ }\n+ g_assert(get_exe_mode(env) != HEX_EXE_MODE_WAIT);\n+\n+ cs = env_cpu(env);\n+ /*\n+ * The addtion of cpu_has_work is borrowed from arm's wfi helper\n+ * and is critical for our stability\n+ */\n+ if ((cs->exception_index != HEX_EVENT_NONE) ||\n+ (cpu_has_work(cs))) {\n+ qemu_log_mask(CPU_LOG_INT,\n+ \"%s: thread %\" PRIu32 \" skipping WAIT mode, have some work\\n\",\n+ __func__, env->threadId);\n+ return;\n+ }\n+ set_wait_mode(env);\n+ env->wait_next_pc = PC + 4;\n+\n+ cpu_interrupt(cs, CPU_INTERRUPT_HALT);\n+}\n+\n+void HELPER(wait)(CPUHexagonState *env, uint32_t PC)\n+{\n+ BQL_LOCK_GUARD();\n+\n+ if (!fIN_DEBUG_MODE(env->threadId)) {\n+ hexagon_wait_thread(env, PC);\n+ }\n }\n \n void HELPER(resume)(CPUHexagonState *env, uint32_t mask)\n", "prefixes": [ "v4", "05/28" ] }