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GET /api/patches/2202562/?format=api
{ "id": 2202562, "url": "http://patchwork.ozlabs.org/api/patches/2202562/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260227203627.932864-10-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": "<20260227203627.932864-10-brian.cain@oss.qualcomm.com>", "list_archive_url": null, "date": "2026-02-27T20:35:59", "name": "[v3,09/37] target/hexagon: Add privilege check, use tag_ignore()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "37d82fa16e5dfd62b5ee3280f387cccc001bcf01", "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/20260227203627.932864-10-brian.cain@oss.qualcomm.com/mbox/", "series": [ { "id": 493813, "url": "http://patchwork.ozlabs.org/api/series/493813/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=493813", "date": "2026-02-27T20:35:57", "name": "Hexagon system emulation - Part 1/3", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/493813/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2202562/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2202562/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) 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<laurent@vivier.eu>,\n Pierrick Bouvier <pierrick.bouvier@linaro.org>", "Subject": "[PATCH v3 09/37] target/hexagon: Add privilege check,\n use tag_ignore()", "Date": "Fri, 27 Feb 2026 12:35:59 -0800", "Message-Id": "<20260227203627.932864-10-brian.cain@oss.qualcomm.com>", "X-Mailer": "git-send-email 2.34.1", "In-Reply-To": "<20260227203627.932864-1-brian.cain@oss.qualcomm.com>", "References": "<20260227203627.932864-1-brian.cain@oss.qualcomm.com>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "X-Proofpoint-ORIG-GUID": "f_vBEV0_nl5QTezkZjGpEgTNtQkGj30W", "X-Proofpoint-GUID": "f_vBEV0_nl5QTezkZjGpEgTNtQkGj30W", "X-Authority-Analysis": "v=2.4 cv=DOqCIiNb c=1 sm=1 tr=0 ts=69a2005f cx=c_pps\n a=WJcna6AvsNCxL/DJwPP1KA==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17\n a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10\n a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22\n a=COk6AnOGAAAA:8 a=pGLkceISAAAA:8 a=EUspDBNiAAAA:8 a=VlJJRYDoeMviBMv8l8cA:9\n a=QEXdDO2ut3YA:10 a=_Y9Zt4tPzoBS9L09Snn2:22 a=TjNXssC_j7lpFel5tvFf:22", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwMjI3MDE4MSBTYWx0ZWRfX5D8bYgfCXNFS\n Yck4+I6jhGgf78vgnVJQo+6XLWPI3x4im33PO74tYFlFjxa6AmCQMB22KZXLcbHxOl5Kttnvdb6\n /I4LlZruu5vYRn7oYGF0Eo65qOB3l9Jd2HmOBbAldC012GxM91IonT5tQa2q2MXvnDSYnxWL1Vy\n tcbgG9lpVTbOzWuhhiD2c+VZT/6Ln+gJDUpFuznnmbeGAy7oMBbGTRqyNSGSP/gw1Vo2Hqogqoi\n 2EDCNirSqnydMZlVO2D9aetGX1Ux3FicPudvAF54mLm7hnC0MHaFUNnKzgNnSa2iBKxYvoS+1MP\n oJj5nwyHPlHpn8pPZPqi76hOLtEWTLtP6F/FF2jEdlfXyPHQNiNPifRacVs8d0o9XhT6msRfbUj\n R1ZOGmRd+cxUif1YtGpAOgd6DRyUg5U54FBpapRiwcKdsk0yDcVZkRwRW5jm4CQ9yN6ScRsQ38G\n d5aSdr1Htol/Zrb+XSQ==", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-02-27_04,2026-02-27_03,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n spamscore=0 phishscore=0 malwarescore=0 adultscore=0 priorityscore=1501\n clxscore=1015 suspectscore=0 impostorscore=0 lowpriorityscore=0 bulkscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2602270181", "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": "-16", "X-Spam_score": "-1.7", "X-Spam_bar": "-", "X-Spam_report": "(-1.7 / 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=0.706,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.401, 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": "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/cpu.h | 1 +\n linux-user/hexagon/cpu_loop.c | 16 +++++++++++++++\n target/hexagon/cpu.c | 1 +\n target/hexagon/translate.c | 8 ++++++++\n target/hexagon/gen_tcg_funcs.py | 35 +++++++++++++++++++++------------\n 5 files changed, 48 insertions(+), 13 deletions(-)", "diff": "diff --git a/target/hexagon/cpu.h b/target/hexagon/cpu.h\nindex 049856e7cba..9fd69c7453f 100644\n--- a/target/hexagon/cpu.h\n+++ b/target/hexagon/cpu.h\n@@ -85,6 +85,7 @@ typedef struct {\n typedef struct CPUArchState {\n target_ulong gpr[TOTAL_PER_THREAD_REGS];\n target_ulong pred[NUM_PREGS];\n+ target_ulong cause_code;\n \n /* For comparing with LLDB on target - see adjust_stack_ptrs function */\n target_ulong last_pc_dumped;\ndiff --git a/linux-user/hexagon/cpu_loop.c b/linux-user/hexagon/cpu_loop.c\nindex 5711055aff2..b63990663ab 100644\n--- a/linux-user/hexagon/cpu_loop.c\n+++ b/linux-user/hexagon/cpu_loop.c\n@@ -22,6 +22,7 @@\n #include \"qemu.h\"\n #include \"user-internals.h\"\n #include \"user/cpu_loop.h\"\n+#include \"target/hexagon/internal.h\"\n #include \"signal-common.h\"\n #include \"internal.h\"\n \n@@ -60,6 +61,21 @@ void cpu_loop(CPUHexagonState *env)\n env->gpr[0] = ret;\n }\n break;\n+ case HEX_EVENT_PRECISE:\n+ switch (env->cause_code) {\n+ case HEX_CAUSE_PRIV_USER_NO_GINSN:\n+ case HEX_CAUSE_PRIV_USER_NO_SINSN:\n+ case HEX_CAUSE_INVALID_PACKET:\n+ force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPC,\n+ env->gpr[HEX_REG_PC]);\n+ break;\n+ default:\n+ EXCP_DUMP(env, \"\\nqemu: unhandled CPU precise exception \"\n+ \"cause code 0x%x - aborting\\n\",\n+ env->cause_code);\n+ exit(EXIT_FAILURE);\n+ }\n+ break;\n case HEX_CAUSE_PC_NOT_ALIGNED:\n force_sig_fault(TARGET_SIGBUS, TARGET_BUS_ADRALN,\n env->gpr[HEX_REG_R31]);\ndiff --git a/target/hexagon/cpu.c b/target/hexagon/cpu.c\nindex 82c726139f7..a38568a2857 100644\n--- a/target/hexagon/cpu.c\n+++ b/target/hexagon/cpu.c\n@@ -306,6 +306,7 @@ static void hexagon_cpu_reset_hold(Object *obj, ResetType type)\n set_float_detect_tininess(float_tininess_before_rounding, &env->fp_status);\n /* Default NaN value: sign bit set, all frac bits set */\n set_float_default_nan_pattern(0b11111111, &env->fp_status);\n+ env->cause_code = HEX_EVENT_NONE;\n }\n \n static void hexagon_cpu_disas_set_info(const CPUState *cs,\ndiff --git a/target/hexagon/translate.c b/target/hexagon/translate.c\nindex 877cb38ae77..f44080608b5 100644\n--- a/target/hexagon/translate.c\n+++ b/target/hexagon/translate.c\n@@ -65,6 +65,10 @@ TCGv hex_vstore_addr[VSTORES_MAX];\n TCGv hex_vstore_size[VSTORES_MAX];\n TCGv hex_vstore_pending[VSTORES_MAX];\n \n+#ifndef CONFIG_USER_ONLY\n+TCGv hex_cause_code;\n+#endif\n+\n static const char * const hexagon_prednames[] = {\n \"p0\", \"p1\", \"p2\", \"p3\"\n };\n@@ -1153,4 +1157,8 @@ void hexagon_translate_init(void)\n offsetof(CPUHexagonState, vstore_pending[i]),\n vstore_pending_names[i]);\n }\n+#ifndef CONFIG_USER_ONLY\n+ hex_cause_code = tcg_global_mem_new(tcg_env,\n+ offsetof(CPUHexagonState, cause_code), \"cause_code\");\n+#endif\n }\ndiff --git a/target/hexagon/gen_tcg_funcs.py b/target/hexagon/gen_tcg_funcs.py\nindex 87b7f10d7fd..d91bbcf1dc8 100755\n--- a/target/hexagon/gen_tcg_funcs.py\n+++ b/target/hexagon/gen_tcg_funcs.py\n@@ -21,7 +21,7 @@\n import re\n import string\n import hex_common\n-\n+from textwrap import dedent\n \n ##\n ## Generate the TCG code to call the helper\n@@ -49,6 +49,18 @@ def gen_tcg_func(f, tag, regs, imms):\n \n f.write(\" Insn *insn G_GNUC_UNUSED = ctx->insn;\\n\")\n \n+ if \"A_PRIV\" in hex_common.attribdict[tag]:\n+ f.write(dedent(\"\"\"\\\n+#ifdef CONFIG_USER_ONLY\n+ hex_gen_exception_end_tb(ctx, HEX_CAUSE_PRIV_USER_NO_SINSN);\n+#else\n+\"\"\"))\n+ if \"A_GUEST\" in hex_common.attribdict[tag]:\n+ f.write(dedent(\"\"\"\\\n+#ifdef CONFIG_USER_ONLY\n+ hex_gen_exception_end_tb(ctx, HEX_CAUSE_PRIV_USER_NO_GINSN);\n+#else\n+\"\"\"))\n if hex_common.need_ea(tag):\n f.write(\" TCGv EA G_GNUC_UNUSED = tcg_temp_new();\\n\")\n \n@@ -100,6 +112,11 @@ def gen_tcg_func(f, tag, regs, imms):\n if reg.is_written():\n reg.gen_write(f, tag)\n \n+ if (\n+ \"A_PRIV\" in hex_common.attribdict[tag]\n+ or \"A_GUEST\" in hex_common.attribdict[tag]\n+ ):\n+ f.write(\"#endif /* CONFIG_USER_ONLY */\\n\")\n f.write(\"}\\n\\n\")\n \n \n@@ -124,18 +141,10 @@ def main():\n f.write('#include \"idef-generated-emitter.h.inc\"\\n\\n')\n \n for tag in hex_common.tags:\n- ## Skip the priv instructions\n- if \"A_PRIV\" in hex_common.attribdict[tag]:\n- continue\n- ## Skip the guest instructions\n- if \"A_GUEST\" in hex_common.attribdict[tag]:\n- continue\n- ## Skip the diag instructions\n- if tag == \"Y6_diag\":\n- continue\n- if tag == \"Y6_diag0\":\n- continue\n- if tag == \"Y6_diag1\":\n+ if hex_common.tag_ignore(tag):\n+ f.write(f\"static void generate_{tag}\"\n+ f\"(DisasContext *ctx)\\n\")\n+ f.write(\"{\\n}\\n\\n\")\n continue\n \n gen_def_tcg_func(f, tag, tagregs, tagimms)\n", "prefixes": [ "v3", "09/37" ] }