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Wed, 01 Apr 2026 08:27:50 -0700 (PDT) X-Received: by 2002:a05:7301:168a:b0:2c0:f424:b545 with SMTP id 5a478bee46e88-2c931c9246dmr2465538eec.15.1775057270005; Wed, 01 Apr 2026 08:27:50 -0700 (PDT) From: Brian Cain To: qemu-devel@nongnu.org Cc: brian.cain@oss.qualcomm.com, philmd@linaro.org, ltaylorsimpson@gmail.com, matheus.bernardino@oss.qualcomm.com, marco.liebel@oss.qualcomm.com, quic_mburton@quicinc.com, sid.manning@oss.qualcomm.com, ale@rev.ng, anjo@rev.ng, Brian Cain Subject: [PATCH v6 05/37] target/hexagon: Handle system/guest registers in gen_analyze_funcs.py and hex_common.py Date: Wed, 1 Apr 2026 08:26:25 -0700 Message-Id: <20260401152657.314902-6-brian.cain@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260401152657.314902-1-brian.cain@oss.qualcomm.com> References: <20260401152657.314902-1-brian.cain@oss.qualcomm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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 a=wEP8DlPgTf/vqF+yE6f9lg==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=COk6AnOGAAAA:8 a=pGLkceISAAAA:8 a=EUspDBNiAAAA:8 a=-IRm0M9p1sl727KxlF4A:9 a=QEXdDO2ut3YA:10 a=bBxd6f-gb0O0v-kibOvt:22 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDAxMDE0NCBTYWx0ZWRfXygFwvBHDIsSn CnsMhceJICi3DQOr8+8kgd+9LuKlX76jnuXhtB1o5onPhv+Zy5BCkHottNDnIOShpVNUhLNX4sR bkrCniFCpjBmD1IkW22UynK+sd5mP7+VeCK1bU+zzMdR7PZkF5tpWf43u7L5pWmVHoS76bvmBM1 VauMP+/QwLybXMuWuH35b2Cz8Uh5KzuQvI/mzs+/xD9QLbp6oiK3TyeEgtGW70a9rEsWvR+m57/ sibHPBHrFfCG73RngxpW3cOlEHKqPBHTQSlJLQ4Gi/lgVkQodhsLL45NQjH8V7Ldo02qryqBYN1 TdLU7bN28ukn/Lohy2oFqDLAcwNNFFuZ+yyXvFlc7sfBOdB2XQO4ud24gvUOSFRvVuOKBcroDpt +/CdIPrx4I2cbbmDclgN8piFVAZbyOY2ahnSOkZmb7uCGSlFm9GEJjxlwSzqzMkF7ItIQnFI8Ss wsVI8x9USGAVLqWJ0wg== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-01_04,2026-04-01_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 priorityscore=1501 bulkscore=0 phishscore=0 malwarescore=0 lowpriorityscore=0 adultscore=0 clxscore=1015 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604010144 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=205.220.180.131; 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, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=1, RCVD_IN_VALIDITY_RPBL_BLOCKED=1, SPF_HELO_NONE=0.001, 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @qualcomm.com) X-ZM-MESSAGEID: 1775057350772158500 From: Brian Cain Add register classes for guest (G) and system (S) registers to hex_common.py, and update gen_analyze_funcs.py to handle them. Guest and system registers can only appear once per packet (one transfer instruction each), so there is no read-after-write hazard to detect during the analyze phase. Source classes (GuestSource, GuestPairSource, SystemSource, SystemPairSource) provide a no-op analyze_read() since these register reads do not need tracking. Reviewed-by: Taylor Simpson Signed-off-by: Brian Cain --- target/hexagon/gen_analyze_funcs.py | 14 ++- target/hexagon/hex_common.py | 152 ++++++++++++++++++++++++++++ 2 files changed, 164 insertions(+), 2 deletions(-) diff --git a/target/hexagon/gen_analyze_funcs.py b/target/hexagon/gen_analy= ze_funcs.py index fdefd5b4b36..44bb22ed927 100755 --- a/target/hexagon/gen_analyze_funcs.py +++ b/target/hexagon/gen_analyze_funcs.py @@ -22,7 +22,6 @@ import string import hex_common =20 - ## ## Generate the code to analyze the instruction ## For A2_add: Rd32=3Dadd(Rs32,Rt32), { RdV=3DRsV+RtV;} @@ -42,6 +41,13 @@ def gen_analyze_func(f, tag, regs, imms): f.write(f"static void analyze_{tag}(DisasContext *ctx)\n") f.write("{\n") =20 + if hex_common.tag_ignore(tag): + f.write("}\n\n") + return + + if hex_common.is_sysemu_tag(tag): + f.write("#ifndef CONFIG_USER_ONLY\n") + f.write(" Insn *insn G_GNUC_UNUSED =3D ctx->insn;\n") if (hex_common.is_hvx_insn(tag)): if hex_common.has_hvx_helper(tag): @@ -58,7 +64,8 @@ def gen_analyze_func(f, tag, regs, imms): for regno, register in enumerate(regs): reg_type, reg_id =3D register reg =3D hex_common.get_register(tag, reg_type, reg_id) - reg.decl_reg_num(f, regno) + if reg.is_read() or reg.is_written(): + reg.decl_reg_num(f, regno) =20 ## Analyze the register reads for regno, register in enumerate(regs): @@ -78,6 +85,9 @@ def gen_analyze_func(f, tag, regs, imms): =20 f.write(" mark_implicit_writes(ctx);\n") =20 + if hex_common.is_sysemu_tag(tag): + f.write("#endif /* !CONFIG_USER_ONLY */\n") + f.write("}\n\n") =20 =20 diff --git a/target/hexagon/hex_common.py b/target/hexagon/hex_common.py index 002afcdb9e3..ceb4b6812d6 100755 --- a/target/hexagon/hex_common.py +++ b/target/hexagon/hex_common.py @@ -33,6 +33,41 @@ overrides =3D {} # tags with helper overrides idef_parser_enabled =3D {} # tags enabled for idef-parser =20 + +def is_sysemu_tag(tag): + return bool(attribdict[tag] & {"A_PRIV", "A_GUEST"}) + + +def tag_ignore(tag): + tag_skips =3D ( + "Y6_diag", + "Y6_diag0", + "Y6_diag1", + ) + attr_skips =3D { + "A_FAKEINSN", + "A_MAPPING", + "A_CONDMAPPING", + } + return tag in tag_skips or attribdict[tag] & attr_skips + + +def get_sys_tags(): + return sorted( + tag for tag in frozenset(tags) if is_sysemu_tag(tag) + ) + + +def get_user_tags(): + return sorted( + tag for tag in frozenset(tags) if not is_sysemu_tag(tag) + ) + + +def get_all_tags(): + return get_user_tags() + get_sys_tags() + + # We should do this as a hash for performance, # but to keep order let's keep it as a list. def uniquify(seq): @@ -369,12 +404,16 @@ def helper_proto_type(self): return "s32" def helper_arg_type(self): return "int32_t" + def is_pair(self): + return False =20 class Pair(Scalar): def helper_proto_type(self): return "s64" def helper_arg_type(self): return "int64_t" + def is_pair(self): + return True =20 class Hvx: def is_scalar_reg(self): @@ -1010,6 +1049,109 @@ def analyze_write(self, f, tag, regno): ctx_log_qreg_write(ctx, {self.reg_num}, insn_has_hvx_helper); """)) =20 +class GuestRegister(Register): + pass + +class GuestDest(GuestRegister, Single, Dest): + def decl_tcg(self, f, tag, regno): + self.decl_reg_num(f, regno) + f.write(code_fmt(f"""\ + TCGv_i32 {self.reg_tcg()} =3D tcg_temp_new_i32(); + """)) + def gen_write(self, f, tag): + f.write(code_fmt(f"""\ + gen_log_greg_write(ctx, {self.reg_num}, {self.reg_tcg()}); + """)) + def analyze_write(self, f, tag, regno): + f.write(code_fmt(f"""\ + ctx_log_greg_write(ctx, {self.reg_num}); + """)) + +class GuestSource(GuestRegister, Single, OldSource): + def decl_tcg(self, f, tag, regno): + self.decl_reg_num(f, regno) + f.write(code_fmt(f"""\ + TCGv_i32 {self.reg_tcg()} =3D tcg_temp_new_i32(); + gen_read_greg({self.reg_tcg()}, {self.reg_num}); + """)) + def analyze_read(self, f, regno): + pass + +class GuestPairDest(GuestRegister, Pair, Dest): + def decl_tcg(self, f, tag, regno): + self.decl_reg_num(f, regno) + f.write(code_fmt(f"""\ + TCGv_i64 {self.reg_tcg()} =3D tcg_temp_new_i64(); + """)) + def gen_write(self, f, tag): + f.write(code_fmt(f"""\ + gen_log_greg_write_pair(ctx, {self.reg_num}, {self.reg_tcg()}); + """)) + def analyze_write(self, f, tag, regno): + f.write(code_fmt(f"""\ + ctx_log_greg_write_pair(ctx, {self.reg_num}); + """)) + +class GuestPairSource(GuestRegister, Pair, OldSource): + def decl_tcg(self, f, tag, regno): + self.decl_reg_num(f, regno) + f.write(code_fmt(f"""\ + TCGv_i64 {self.reg_tcg()} =3D tcg_temp_new_i64(); + gen_read_greg_pair({self.reg_tcg()}, {self.reg_num}); + """)) + def analyze_read(self, f, regno): + pass + +class SystemDest(Register, Single, Dest): + def decl_tcg(self, f, tag, regno): + self.decl_reg_num(f, regno) + f.write(code_fmt(f"""\ + TCGv_i32 {self.reg_tcg()} =3D tcg_temp_new_i32(); + """)) + def gen_write(self, f, tag): + f.write(code_fmt(f"""\ + gen_log_sreg_write(ctx, {self.reg_num}, {self.reg_tcg()}); + """)) + def analyze_write(self, f, tag, regno): + f.write(code_fmt(f"""\ + ctx_log_sreg_write(ctx, {self.reg_num}); + """)) + +class SystemSource(Register, Single, OldSource): + def decl_tcg(self, f, tag, regno): + self.decl_reg_num(f, regno) + f.write(code_fmt(f"""\ + TCGv_i32 {self.reg_tcg()} =3D tcg_temp_new_i32(); + gen_read_sreg({self.reg_tcg()}, {self.reg_num}); + """)) + def analyze_read(self, f, regno): + pass + +class SystemPairDest(Register, Pair, Dest): + def decl_tcg(self, f, tag, regno): + self.decl_reg_num(f, regno) + f.write(code_fmt(f"""\ + TCGv_i64 {self.reg_tcg()} =3D tcg_temp_new_i64(); + """)) + def gen_write(self, f, tag): + f.write(code_fmt(f"""\ + gen_log_sreg_write_pair(ctx, {self.reg_num}, {self.reg_tcg()}); + """)) + def analyze_write(self, f, tag, regno): + f.write(code_fmt(f"""\ + ctx_log_sreg_write_pair(ctx, {self.reg_num}); + """)) + +class SystemPairSource(Register, Pair, OldSource): + def decl_tcg(self, f, tag, regno): + self.decl_reg_num(f, regno) + f.write(code_fmt(f"""\ + TCGv_i64 {self.reg_tcg()} =3D tcg_temp_new_i64(); + gen_read_sreg_pair({self.reg_tcg()}, {self.reg_num}); + """)) + def analyze_read(self, f, regno): + pass + def init_registers(): regs =3D { GprDest("R", "d"), @@ -1056,6 +1198,16 @@ def init_registers(): QRegSource("Q", "u"), QRegSource("Q", "v"), QRegReadWrite("Q", "x"), + + # system regs + GuestDest("G", "d"), + GuestSource("G", "s"), + GuestPairDest("G", "dd"), + GuestPairSource("G", "ss"), + SystemDest("S", "d"), + SystemSource("S", "s"), + SystemPairDest("S", "dd"), + SystemPairSource("S", "ss"), } for reg in regs: registers[f"{reg.regtype}{reg.regid}"] =3D reg --=20 2.34.1