Commit 187304a617 for qemu.org

commit 187304a617bf9452f4882a7a5ac3513cb7d2a689
Author: Richard Henderson <richard.henderson@linaro.org>
Date:   Fri May 22 15:02:03 2026 -0700

    target/arm: Implement ID_AA64ISAR3

    Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
    Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
    Message-id: 20260522220306.235200-2-richard.henderson@linaro.org
    Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target/arm/cpu-features.h b/target/arm/cpu-features.h
index 4e44245a8b..50776347a5 100644
--- a/target/arm/cpu-features.h
+++ b/target/arm/cpu-features.h
@@ -244,6 +244,15 @@ FIELD(ID_AA64ISAR2, CSSC, 52, 4)
 FIELD(ID_AA64ISAR2, LUT, 56, 4)
 FIELD(ID_AA64ISAR2, ATS1A, 60, 4)

+FIELD(ID_AA64ISAR3, CPA, 0, 4)
+FIELD(ID_AA64ISAR3, FAMINMAX, 4, 4)
+FIELD(ID_AA64ISAR3, TLBIW, 8, 4)
+FIELD(ID_AA64ISAR3, PACM, 12, 4)
+FIELD(ID_AA64ISAR3, LSFE, 16, 4)
+FIELD(ID_AA64ISAR3, OCCMO, 20, 4)
+FIELD(ID_AA64ISAR3, LSUI, 24, 4)
+FIELD(ID_AA64ISAR3, FPRCVT, 28, 4)
+
 FIELD(ID_AA64PFR0, EL0, 0, 4)
 FIELD(ID_AA64PFR0, EL1, 4, 4)
 FIELD(ID_AA64PFR0, EL2, 8, 4)
diff --git a/target/arm/cpu-sysregs.h.inc b/target/arm/cpu-sysregs.h.inc
index 3d1ed40f04..b99579f773 100644
--- a/target/arm/cpu-sysregs.h.inc
+++ b/target/arm/cpu-sysregs.h.inc
@@ -10,6 +10,7 @@ DEF(ID_AA64AFR1_EL1, 3, 0, 0, 5, 5)
 DEF(ID_AA64ISAR0_EL1, 3, 0, 0, 6, 0)
 DEF(ID_AA64ISAR1_EL1, 3, 0, 0, 6, 1)
 DEF(ID_AA64ISAR2_EL1, 3, 0, 0, 6, 2)
+DEF(ID_AA64ISAR3_EL1, 3, 0, 0, 6, 3)
 DEF(ID_AA64MMFR0_EL1, 3, 0, 0, 7, 0)
 DEF(ID_AA64MMFR1_EL1, 3, 0, 0, 7, 1)
 DEF(ID_AA64MMFR2_EL1, 3, 0, 0, 7, 2)
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index c47b70ac69..e1ea41fdc5 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1747,6 +1747,7 @@ static void arm_clear_aarch64_idregs(ARMCPU *cpu)
     SET_IDREG(&cpu->isar, ID_AA64ISAR0, 0);
     SET_IDREG(&cpu->isar, ID_AA64ISAR1, 0);
     SET_IDREG(&cpu->isar, ID_AA64ISAR2, 0);
+    SET_IDREG(&cpu->isar, ID_AA64ISAR3, 0);
     SET_IDREG(&cpu->isar, ID_AA64PFR0, 0);
     SET_IDREG(&cpu->isar, ID_AA64PFR1, 0);
     SET_IDREG(&cpu->isar, ID_AA64PFR2, 0);
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 8240f1b384..6ad01b345f 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -6519,11 +6519,11 @@ void register_cp_regs_for_features(ARMCPU *cpu)
               .access = PL1_R, .type = ARM_CP_CONST,
               .accessfn = access_tid3,
               .resetvalue = GET_IDREG(isar, ID_AA64ISAR2)},
-            { .name = "ID_AA64ISAR3_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
+            { .name = "ID_AA64ISAR3_EL1", .state = ARM_CP_STATE_AA64,
               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 3,
               .access = PL1_R, .type = ARM_CP_CONST,
               .accessfn = access_tid3,
-              .resetvalue = 0 },
+              .resetvalue = GET_IDREG(isar, ID_AA64ISAR3) },
             { .name = "ID_AA64ISAR4_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 4,
               .access = PL1_R, .type = ARM_CP_CONST,
@@ -6752,6 +6752,10 @@ void register_cp_regs_for_features(ARMCPU *cpu)
                                R_ID_AA64ISAR2_BC_MASK |
                                R_ID_AA64ISAR2_RPRFM_MASK |
                                R_ID_AA64ISAR2_CSSC_MASK },
+            { .name = "ID_AA64ISAR3_EL1",
+              .exported_bits = R_ID_AA64ISAR3_FAMINMAX_MASK |
+                               R_ID_AA64ISAR3_LSFE_MASK |
+                               R_ID_AA64ISAR3_FPRCVT_MASK },
             { .name = "ID_AA64ISAR*_EL1_RESERVED",
               .is_glob = true },
         };