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GET /api/patches/2218647/?format=api
{ "id": 2218647, "url": "http://patchwork.ozlabs.org/api/patches/2218647/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260401152657.314902-33-brian.cain@oss.qualcomm.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/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": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260401152657.314902-33-brian.cain@oss.qualcomm.com>", "list_archive_url": null, "date": "2026-04-01T15:26:52", "name": "[v6,32/37] target/hexagon: Add pcycle setting functionality", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "15772f904bea0593d93216ebebd80a27f4c9e7ab", "submitter": { "id": 89839, "url": "http://patchwork.ozlabs.org/api/people/89839/?format=api", "name": "Brian Cain", "email": "brian.cain@oss.qualcomm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260401152657.314902-33-brian.cain@oss.qualcomm.com/mbox/", "series": [ { "id": 498350, "url": "http://patchwork.ozlabs.org/api/series/498350/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=498350", "date": "2026-04-01T15:26:45", "name": "Hexagon system emulation - Part 1/3", "version": 6, "mbox": "http://patchwork.ozlabs.org/series/498350/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2218647/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2218647/checks/", "tags": {}, "related": [], "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=XcDCgc3+;\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=RR1piDSO;\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=B+O0EetM c=1 sm=1 tr=0 ts=69cd3997 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=_glEPmIy2e8OvE2BGh3C:22\n a=pGLkceISAAAA:8 a=EUspDBNiAAAA:8 a=OF6xqQKflNrgTLtdKXcA:9 a=QEXdDO2ut3YA:10\n a=PxkB5W3o20Ba91AHUih5:22", "X-Proofpoint-ORIG-GUID": "olFzK7aPobLLXtV1ybq2TuWIrjmBQPhF", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDAxMDE0NCBTYWx0ZWRfX8yH9nIfxd+wJ\n aBzHyjhty1SPtD1Xd1XRduMFnXTTCMUO+1F+dechC3wIWq6Df1TQTMHo1i39K0sS+8MWE8z01ZX\n s3fPWWP8GZ5FjRnTAufDnX6rhH4Fj15/aDwaOYvmqQtC5SfAJSiiskYcS8qb6BSPc2OQtizBcwU\n unF5v4RqrN/Zng/PWpmSNTTsP3ZXy5gs4g46W20xPV6AdBrvw1/7WePK1WraeKkwEZ7hO+JljpK\n FajAWSnZBUtEJGHv3VkSSMfzKjuV5sCA4iFXOocLsPbLQQpk3fJ8/r1PXKHr02VI+AkBzUhwFbX\n on4wGHETbu4JMybC9XA7NI1JtqJrfpFv9w22T1mZFKid17KsSLXFaOhuVBso2NoL9PzPKgxFIa6\n xTYpPhjYIoR/9r1O7BnCY8l+4PbY4Dj9A5mi1KLw0wT6KeIfuUF/JW9r+TV/fkmCRurHJX3pvbJ\n c2hONRbjun2N+Lv3tNA==", "X-Proofpoint-GUID": "olFzK7aPobLLXtV1ybq2TuWIrjmBQPhF", "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=2026-04-01_04,2026-04-01_02,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n priorityscore=1501 impostorscore=0 adultscore=0 malwarescore=0\n lowpriorityscore=0 spamscore=0 clxscore=1015 suspectscore=0 phishscore=0\n bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound\n adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001\n definitions=main-2604010144", "Received-SPF": "pass client-ip=205.220.180.131;\n envelope-from=brian.cain@oss.qualcomm.com; helo=mx0b-0031df01.pphosted.com", "X-Spam_score_int": "-7", "X-Spam_score": "-0.8", "X-Spam_bar": "/", "X-Spam_report": "(-0.8 / 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_CERTIFIED_BLOCKED=1,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=1, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=no 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": "Replace pcycle set stubs with real implementations that\ndistribute cycle count changes across all active threads.\n\nReviewed-by: Taylor Simpson <ltaylorsimpson@gmail.com>\nSigned-off-by: Brian Cain <brian.cain@oss.qualcomm.com>\n---\n target/hexagon/cpu_helper.c | 43 ++++++++++++++++++++++++++++++++++---\n 1 file changed, 40 insertions(+), 3 deletions(-)", "diff": "diff --git a/target/hexagon/cpu_helper.c b/target/hexagon/cpu_helper.c\nindex bb991a671e8..64c5746c6d9 100644\n--- a/target/hexagon/cpu_helper.c\n+++ b/target/hexagon/cpu_helper.c\n@@ -56,17 +56,54 @@ uint32_t hexagon_get_sys_pcycle_count_low(CPUHexagonState *env)\n \n void hexagon_set_sys_pcycle_count_high(CPUHexagonState *env, uint32_t val)\n {\n- g_assert_not_reached();\n+ uint64_t old;\n+\n+ g_assert(bql_locked());\n+ old = hexagon_get_sys_pcycle_count(env);\n+ old = deposit64(old, 32, 32, val);\n+ hexagon_set_sys_pcycle_count(env, old);\n }\n \n void hexagon_set_sys_pcycle_count_low(CPUHexagonState *env, uint32_t val)\n {\n- g_assert_not_reached();\n+ uint64_t old;\n+\n+ g_assert(bql_locked());\n+ old = hexagon_get_sys_pcycle_count(env);\n+ old = deposit64(old, 0, 32, val);\n+ hexagon_set_sys_pcycle_count(env, old);\n }\n \n void hexagon_set_sys_pcycle_count(CPUHexagonState *env, uint64_t val)\n {\n- g_assert_not_reached();\n+ CPUState *cs;\n+ uint64_t total;\n+ int num_threads;\n+ int64_t delta, per_thread, remainder;\n+\n+ g_assert(bql_locked());\n+ total = hexagon_get_sys_pcycle_count(env);\n+\n+ /* Count active threads */\n+ num_threads = 0;\n+ CPU_FOREACH(cs) {\n+ num_threads++;\n+ }\n+ g_assert(num_threads > 0);\n+\n+ /*\n+ * Distribute the delta evenly across all threads.\n+ * Any remainder goes to the calling thread.\n+ */\n+ delta = (int64_t)(val - total);\n+ per_thread = delta / num_threads;\n+ remainder = delta - per_thread * num_threads;\n+\n+ CPU_FOREACH(cs) {\n+ CPUHexagonState *thread_env = cpu_env(cs);\n+ thread_env->t_cycle_count += per_thread;\n+ }\n+ env->t_cycle_count += remainder;\n }\n \n static void hexagon_resume_thread(CPUHexagonState *env)\n", "prefixes": [ "v6", "32/37" ] }