diff options
| -rw-r--r-- | linux-user/elfload.c | 1 | ||||
| -rw-r--r-- | target/arm/cpu.h | 5 | ||||
| -rw-r--r-- | target/arm/cpu64.c | 1 | ||||
| -rw-r--r-- | target/arm/translate-a64.c | 24 |
4 files changed, 31 insertions, 0 deletions
diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 86cda127b7..d76b828a78 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -661,6 +661,7 @@ static uint32_t get_elf_hwcap(void) GET_FEATURE_ID(aa64_sb, ARM_HWCAP_A64_SB); GET_FEATURE_ID(aa64_condm_4, ARM_HWCAP_A64_FLAGM); GET_FEATURE_ID(aa64_dcpop, ARM_HWCAP_A64_DCPOP); + GET_FEATURE_ID(aa64_rcpc_8_3, ARM_HWCAP_A64_LRCPC); return hwcaps; } diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 6013287f62..ff30985ead 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -3774,6 +3774,11 @@ static inline bool isar_feature_aa64_pmu_8_4(const ARMISARegisters *id) FIELD_EX64(id->id_aa64dfr0, ID_AA64DFR0, PMUVER) != 0xf; } +static inline bool isar_feature_aa64_rcpc_8_3(const ARMISARegisters *id) +{ + return FIELD_EX64(id->id_aa64isar1, ID_AA64ISAR1, LRCPC) != 0; +} + /* * Feature tests for "does this exist in either 32-bit or 64-bit?" */ diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index 8f2a43c938..18c7b40f98 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -654,6 +654,7 @@ static void aarch64_max_initfn(Object *obj) t = FIELD_DP64(t, ID_AA64ISAR1, SB, 1); t = FIELD_DP64(t, ID_AA64ISAR1, SPECRES, 1); t = FIELD_DP64(t, ID_AA64ISAR1, FRINTTS, 1); + t = FIELD_DP64(t, ID_AA64ISAR1, LRCPC, 1); /* ARMv8.3-RCPC */ cpu->isar.id_aa64isar1 = t; t = cpu->isar.id_aa64pfr0; diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index 596bf4cf73..7a066fb7cb 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -3142,6 +3142,8 @@ static void disas_ldst_atomic(DisasContext *s, uint32_t insn, int rs = extract32(insn, 16, 5); int rn = extract32(insn, 5, 5); int o3_opc = extract32(insn, 12, 4); + bool r = extract32(insn, 22, 1); + bool a = extract32(insn, 23, 1); TCGv_i64 tcg_rs, clean_addr; AtomicThreeOpFn *fn; @@ -3177,6 +3179,13 @@ static void disas_ldst_atomic(DisasContext *s, uint32_t insn, case 010: /* SWP */ fn = tcg_gen_atomic_xchg_i64; break; + case 014: /* LDAPR, LDAPRH, LDAPRB */ + if (!dc_isar_feature(aa64_rcpc_8_3, s) || + rs != 31 || a != 1 || r != 0) { + unallocated_encoding(s); + return; + } + break; default: unallocated_encoding(s); return; @@ -3186,6 +3195,21 @@ static void disas_ldst_atomic(DisasContext *s, uint32_t insn, gen_check_sp_alignment(s); } clean_addr = clean_data_tbi(s, cpu_reg_sp(s, rn)); + + if (o3_opc == 014) { + /* + * LDAPR* are a special case because they are a simple load, not a + * fetch-and-do-something op. + * The architectural consistency requirements here are weaker than + * full load-acquire (we only need "load-acquire processor consistent"), + * but we choose to implement them as full LDAQ. + */ + do_gpr_ld(s, cpu_reg(s, rt), clean_addr, size, false, false, + true, rt, disas_ldst_compute_iss_sf(size, false, 0), true); + tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ); + return; + } + tcg_rs = read_cpu_reg(s, rs, true); if (o3_opc == 1) { /* LDCLR */ |