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GET /api/patches/2218622/?format=api
{ "id": 2218622, "url": "http://patchwork.ozlabs.org/api/patches/2218622/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260401152657.314902-6-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": "<20260401152657.314902-6-brian.cain@oss.qualcomm.com>", "list_archive_url": null, "date": "2026-04-01T15:26:25", "name": "[v6,05/37] target/hexagon: Handle system/guest registers in gen_analyze_funcs.py and hex_common.py", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "b8964bda1d2becefb49a3b6352fb4fa2d294cd8f", "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/20260401152657.314902-6-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/2218622/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2218622/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=BtHKHK/q;\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=KlyXb7z2;\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-Proofpoint-GUID": "jy4c-sUdlZd408qfRJAPNF8cfUunv07Q", "X-Proofpoint-ORIG-GUID": "jy4c-sUdlZd408qfRJAPNF8cfUunv07Q", "X-Authority-Analysis": "v=2.4 cv=B/C0EetM c=1 sm=1 tr=0 ts=69cd3991 cx=c_pps\n a=wEP8DlPgTf/vqF+yE6f9lg==: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=yx91gb_oNiZeI1HMLzn7:22\n a=COk6AnOGAAAA:8 a=pGLkceISAAAA:8 a=EUspDBNiAAAA:8 a=-IRm0M9p1sl727KxlF4A:9\n a=QEXdDO2ut3YA:10 a=bBxd6f-gb0O0v-kibOvt:22 a=TjNXssC_j7lpFel5tvFf:22", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDAxMDE0NCBTYWx0ZWRfXygFwvBHDIsSn\n CnsMhceJICi3DQOr8+8kgd+9LuKlX76jnuXhtB1o5onPhv+Zy5BCkHottNDnIOShpVNUhLNX4sR\n bkrCniFCpjBmD1IkW22UynK+sd5mP7+VeCK1bU+zzMdR7PZkF5tpWf43u7L5pWmVHoS76bvmBM1\n VauMP+/QwLybXMuWuH35b2Cz8Uh5KzuQvI/mzs+/xD9QLbp6oiK3TyeEgtGW70a9rEsWvR+m57/\n sibHPBHrFfCG73RngxpW3cOlEHKqPBHTQSlJLQ4Gi/lgVkQodhsLL45NQjH8V7Ldo02qryqBYN1\n TdLU7bN28ukn/Lohy2oFqDLAcwNNFFuZ+yyXvFlc7sfBOdB2XQO4ud24gvUOSFRvVuOKBcroDpt\n +/CdIPrx4I2cbbmDclgN8piFVAZbyOY2ahnSOkZmb7uCGSlFm9GEJjxlwSzqzMkF7ItIQnFI8Ss\n wsVI8x9USGAVLqWJ0wg==", "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 spamscore=0 priorityscore=1501 bulkscore=0 phishscore=0 malwarescore=0\n lowpriorityscore=0 adultscore=0 clxscore=1015 impostorscore=0 suspectscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2603050001 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": "From: Brian Cain <bcain@quicinc.com>\n\nAdd register classes for guest (G) and system (S) registers to\nhex_common.py, and update gen_analyze_funcs.py to handle them.\n\nGuest and system registers can only appear once per packet (one\ntransfer instruction each), so there is no read-after-write hazard\nto detect during the analyze phase. Source classes (GuestSource,\nGuestPairSource, SystemSource, SystemPairSource) provide a no-op\nanalyze_read() since these register reads do not need tracking.\n\nReviewed-by: Taylor Simpson <ltaylorsimpson@gmail.com>\nSigned-off-by: Brian Cain <brian.cain@oss.qualcomm.com>\n---\n target/hexagon/gen_analyze_funcs.py | 14 ++-\n target/hexagon/hex_common.py | 152 ++++++++++++++++++++++++++++\n 2 files changed, 164 insertions(+), 2 deletions(-)", "diff": "diff --git a/target/hexagon/gen_analyze_funcs.py b/target/hexagon/gen_analyze_funcs.py\nindex fdefd5b4b36..44bb22ed927 100755\n--- a/target/hexagon/gen_analyze_funcs.py\n+++ b/target/hexagon/gen_analyze_funcs.py\n@@ -22,7 +22,6 @@\n import string\n import hex_common\n \n-\n ##\n ## Generate the code to analyze the instruction\n ## For A2_add: Rd32=add(Rs32,Rt32), { RdV=RsV+RtV;}\n@@ -42,6 +41,13 @@ def gen_analyze_func(f, tag, regs, imms):\n f.write(f\"static void analyze_{tag}(DisasContext *ctx)\\n\")\n f.write(\"{\\n\")\n \n+ if hex_common.tag_ignore(tag):\n+ f.write(\"}\\n\\n\")\n+ return\n+\n+ if hex_common.is_sysemu_tag(tag):\n+ f.write(\"#ifndef CONFIG_USER_ONLY\\n\")\n+\n f.write(\" Insn *insn G_GNUC_UNUSED = ctx->insn;\\n\")\n if (hex_common.is_hvx_insn(tag)):\n if hex_common.has_hvx_helper(tag):\n@@ -58,7 +64,8 @@ def gen_analyze_func(f, tag, regs, imms):\n for regno, register in enumerate(regs):\n reg_type, reg_id = register\n reg = hex_common.get_register(tag, reg_type, reg_id)\n- reg.decl_reg_num(f, regno)\n+ if reg.is_read() or reg.is_written():\n+ reg.decl_reg_num(f, regno)\n \n ## Analyze the register reads\n for regno, register in enumerate(regs):\n@@ -78,6 +85,9 @@ def gen_analyze_func(f, tag, regs, imms):\n \n f.write(\" mark_implicit_writes(ctx);\\n\")\n \n+ if hex_common.is_sysemu_tag(tag):\n+ f.write(\"#endif /* !CONFIG_USER_ONLY */\\n\")\n+\n f.write(\"}\\n\\n\")\n \n \ndiff --git a/target/hexagon/hex_common.py b/target/hexagon/hex_common.py\nindex 002afcdb9e3..ceb4b6812d6 100755\n--- a/target/hexagon/hex_common.py\n+++ b/target/hexagon/hex_common.py\n@@ -33,6 +33,41 @@\n overrides = {} # tags with helper overrides\n idef_parser_enabled = {} # tags enabled for idef-parser\n \n+\n+def is_sysemu_tag(tag):\n+ return bool(attribdict[tag] & {\"A_PRIV\", \"A_GUEST\"})\n+\n+\n+def tag_ignore(tag):\n+ tag_skips = (\n+ \"Y6_diag\",\n+ \"Y6_diag0\",\n+ \"Y6_diag1\",\n+ )\n+ attr_skips = {\n+ \"A_FAKEINSN\",\n+ \"A_MAPPING\",\n+ \"A_CONDMAPPING\",\n+ }\n+ return tag in tag_skips or attribdict[tag] & attr_skips\n+\n+\n+def get_sys_tags():\n+ return sorted(\n+ tag for tag in frozenset(tags) if is_sysemu_tag(tag)\n+ )\n+\n+\n+def get_user_tags():\n+ return sorted(\n+ tag for tag in frozenset(tags) if not is_sysemu_tag(tag)\n+ )\n+\n+\n+def get_all_tags():\n+ return get_user_tags() + get_sys_tags()\n+\n+\n # We should do this as a hash for performance,\n # but to keep order let's keep it as a list.\n def uniquify(seq):\n@@ -369,12 +404,16 @@ def helper_proto_type(self):\n return \"s32\"\n def helper_arg_type(self):\n return \"int32_t\"\n+ def is_pair(self):\n+ return False\n \n class Pair(Scalar):\n def helper_proto_type(self):\n return \"s64\"\n def helper_arg_type(self):\n return \"int64_t\"\n+ def is_pair(self):\n+ return True\n \n class Hvx:\n def is_scalar_reg(self):\n@@ -1010,6 +1049,109 @@ def analyze_write(self, f, tag, regno):\n ctx_log_qreg_write(ctx, {self.reg_num}, insn_has_hvx_helper);\n \"\"\"))\n \n+class GuestRegister(Register):\n+ pass\n+\n+class GuestDest(GuestRegister, Single, Dest):\n+ def decl_tcg(self, f, tag, regno):\n+ self.decl_reg_num(f, regno)\n+ f.write(code_fmt(f\"\"\"\\\n+ TCGv_i32 {self.reg_tcg()} = tcg_temp_new_i32();\n+ \"\"\"))\n+ def gen_write(self, f, tag):\n+ f.write(code_fmt(f\"\"\"\\\n+ gen_log_greg_write(ctx, {self.reg_num}, {self.reg_tcg()});\n+ \"\"\"))\n+ def analyze_write(self, f, tag, regno):\n+ f.write(code_fmt(f\"\"\"\\\n+ ctx_log_greg_write(ctx, {self.reg_num});\n+ \"\"\"))\n+\n+class GuestSource(GuestRegister, Single, OldSource):\n+ def decl_tcg(self, f, tag, regno):\n+ self.decl_reg_num(f, regno)\n+ f.write(code_fmt(f\"\"\"\\\n+ TCGv_i32 {self.reg_tcg()} = tcg_temp_new_i32();\n+ gen_read_greg({self.reg_tcg()}, {self.reg_num});\n+ \"\"\"))\n+ def analyze_read(self, f, regno):\n+ pass\n+\n+class GuestPairDest(GuestRegister, Pair, Dest):\n+ def decl_tcg(self, f, tag, regno):\n+ self.decl_reg_num(f, regno)\n+ f.write(code_fmt(f\"\"\"\\\n+ TCGv_i64 {self.reg_tcg()} = tcg_temp_new_i64();\n+ \"\"\"))\n+ def gen_write(self, f, tag):\n+ f.write(code_fmt(f\"\"\"\\\n+ gen_log_greg_write_pair(ctx, {self.reg_num}, {self.reg_tcg()});\n+ \"\"\"))\n+ def analyze_write(self, f, tag, regno):\n+ f.write(code_fmt(f\"\"\"\\\n+ ctx_log_greg_write_pair(ctx, {self.reg_num});\n+ \"\"\"))\n+\n+class GuestPairSource(GuestRegister, Pair, OldSource):\n+ def decl_tcg(self, f, tag, regno):\n+ self.decl_reg_num(f, regno)\n+ f.write(code_fmt(f\"\"\"\\\n+ TCGv_i64 {self.reg_tcg()} = tcg_temp_new_i64();\n+ gen_read_greg_pair({self.reg_tcg()}, {self.reg_num});\n+ \"\"\"))\n+ def analyze_read(self, f, regno):\n+ pass\n+\n+class SystemDest(Register, Single, Dest):\n+ def decl_tcg(self, f, tag, regno):\n+ self.decl_reg_num(f, regno)\n+ f.write(code_fmt(f\"\"\"\\\n+ TCGv_i32 {self.reg_tcg()} = tcg_temp_new_i32();\n+ \"\"\"))\n+ def gen_write(self, f, tag):\n+ f.write(code_fmt(f\"\"\"\\\n+ gen_log_sreg_write(ctx, {self.reg_num}, {self.reg_tcg()});\n+ \"\"\"))\n+ def analyze_write(self, f, tag, regno):\n+ f.write(code_fmt(f\"\"\"\\\n+ ctx_log_sreg_write(ctx, {self.reg_num});\n+ \"\"\"))\n+\n+class SystemSource(Register, Single, OldSource):\n+ def decl_tcg(self, f, tag, regno):\n+ self.decl_reg_num(f, regno)\n+ f.write(code_fmt(f\"\"\"\\\n+ TCGv_i32 {self.reg_tcg()} = tcg_temp_new_i32();\n+ gen_read_sreg({self.reg_tcg()}, {self.reg_num});\n+ \"\"\"))\n+ def analyze_read(self, f, regno):\n+ pass\n+\n+class SystemPairDest(Register, Pair, Dest):\n+ def decl_tcg(self, f, tag, regno):\n+ self.decl_reg_num(f, regno)\n+ f.write(code_fmt(f\"\"\"\\\n+ TCGv_i64 {self.reg_tcg()} = tcg_temp_new_i64();\n+ \"\"\"))\n+ def gen_write(self, f, tag):\n+ f.write(code_fmt(f\"\"\"\\\n+ gen_log_sreg_write_pair(ctx, {self.reg_num}, {self.reg_tcg()});\n+ \"\"\"))\n+ def analyze_write(self, f, tag, regno):\n+ f.write(code_fmt(f\"\"\"\\\n+ ctx_log_sreg_write_pair(ctx, {self.reg_num});\n+ \"\"\"))\n+\n+class SystemPairSource(Register, Pair, OldSource):\n+ def decl_tcg(self, f, tag, regno):\n+ self.decl_reg_num(f, regno)\n+ f.write(code_fmt(f\"\"\"\\\n+ TCGv_i64 {self.reg_tcg()} = tcg_temp_new_i64();\n+ gen_read_sreg_pair({self.reg_tcg()}, {self.reg_num});\n+ \"\"\"))\n+ def analyze_read(self, f, regno):\n+ pass\n+\n def init_registers():\n regs = {\n GprDest(\"R\", \"d\"),\n@@ -1056,6 +1198,16 @@ def init_registers():\n QRegSource(\"Q\", \"u\"),\n QRegSource(\"Q\", \"v\"),\n QRegReadWrite(\"Q\", \"x\"),\n+\n+ # system regs\n+ GuestDest(\"G\", \"d\"),\n+ GuestSource(\"G\", \"s\"),\n+ GuestPairDest(\"G\", \"dd\"),\n+ GuestPairSource(\"G\", \"ss\"),\n+ SystemDest(\"S\", \"d\"),\n+ SystemSource(\"S\", \"s\"),\n+ SystemPairDest(\"S\", \"dd\"),\n+ SystemPairSource(\"S\", \"ss\"),\n }\n for reg in regs:\n registers[f\"{reg.regtype}{reg.regid}\"] = reg\n", "prefixes": [ "v6", "05/37" ] }