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[97.113.188.82]) by smtp.gmail.com with ESMTPSA id c4sm11861031pgq.85.2019.02.11.15.53.08 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 11 Feb 2019 15:53:08 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Date: Mon, 11 Feb 2019 15:52:36 -0800 Message-Id: <20190211235258.542-7-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20190211235258.542-1-richard.henderson@linaro.org> References: <20190211235258.542-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::641 Subject: [Qemu-devel] [PATCH v3 06/28] target/arm: Add MTE system registers X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" This is TFSRE0_EL1, TFSR_EL1, TFSR_EL2, TFSR_EL3, RGSR_EL1, GCR_EL1, GMID_EL1, and PSTATE.TCO. Signed-off-by: Richard Henderson --- v3: Add GMID; add access_mte. --- target/arm/cpu.h | 5 +++ target/arm/internals.h | 6 ++++ target/arm/translate.h | 11 +++++++ target/arm/helper.c | 66 ++++++++++++++++++++++++++++++++++++++ target/arm/translate-a64.c | 11 +++++++ 5 files changed, 99 insertions(+) -- 2.17.2 diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 2776df6981..74633a7a78 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -495,6 +495,11 @@ typedef struct CPUARMState { uint64_t pmccfiltr_el0; /* Performance Monitor Filter Register */ uint64_t vpidr_el2; /* Virtualization Processor ID Register */ uint64_t vmpidr_el2; /* Virtualization Multiprocessor ID Register */ +#ifdef TARGET_AARCH64 + uint64_t tfsr_el[4]; /* tfsrel0_el1 is index 0. */ + uint64_t gcr_el1; + uint64_t rgsr_el1; +#endif } cp15; struct { diff --git a/target/arm/internals.h b/target/arm/internals.h index 2922324f63..fbfa770c23 100644 --- a/target/arm/internals.h +++ b/target/arm/internals.h @@ -1002,4 +1002,10 @@ static inline bool allocation_tag_access_enabled(CPUARMState *env, int el, return sctlr != 0; } +/* + * The log2 of the words in the tag block, for GMID_EL1.BS. + * The is the maximum, 256 bytes, which manipulates 64-bits of tags. + */ +#define GMID_EL1_BS 6 + #endif diff --git a/target/arm/translate.h b/target/arm/translate.h index 5a101e1c6d..a24757d3d7 100644 --- a/target/arm/translate.h +++ b/target/arm/translate.h @@ -204,6 +204,17 @@ static inline TCGv_i32 get_ahp_flag(void) return ret; } +/* Set bits within PSTATE. */ +static inline void set_pstate_bits(uint32_t bits) +{ + TCGv_i32 p = tcg_temp_new_i32(); + + tcg_gen_ld_i32(p, cpu_env, offsetof(CPUARMState, pstate)); + tcg_gen_ori_i32(p, p, bits); + tcg_gen_st_i32(p, cpu_env, offsetof(CPUARMState, pstate)); + tcg_temp_free_i32(p); +} + /* Clear bits within PSTATE. */ static inline void clear_pstate_bits(uint32_t bits) { diff --git a/target/arm/helper.c b/target/arm/helper.c index cbe3500f78..f8e4e6f8ae 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -5732,6 +5732,69 @@ static const ARMCPRegInfo pauth_reginfo[] = { .fieldoffset = offsetof(CPUARMState, apib_key.hi) }, REGINFO_SENTINEL }; + +static CPAccessResult access_mte(CPUARMState *env, const ARMCPRegInfo *ri, + bool isread) +{ + int el = arm_current_el(env); + + if (el < 2 && + arm_feature(env, ARM_FEATURE_EL2) && + !(arm_hcr_el2_eff(env) & HCR_ATA)) { + return CP_ACCESS_TRAP_EL2; + } + if (el < 3 && + arm_feature(env, ARM_FEATURE_EL3) && + !(env->cp15.scr_el3 & SCR_ATA)) { + return CP_ACCESS_TRAP_EL3; + } + return CP_ACCESS_OK; +} + +static uint64_t tco_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + return env->pstate & PSTATE_TCO; +} + +static void tco_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t val) +{ + env->pstate = (env->pstate & ~PSTATE_TCO) | (val & PSTATE_TCO); +} + +static const ARMCPRegInfo mte_reginfo[] = { + { .name = "TFSRE0_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 6, .crm = 6, .opc2 = 1, + .access = PL1_RW, .accessfn = access_mte, + .fieldoffset = offsetof(CPUARMState, cp15.tfsr_el[0]) }, + { .name = "TFSR_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 6, .crm = 5, .opc2 = 0, + .access = PL1_RW, .accessfn = access_mte, + .fieldoffset = offsetof(CPUARMState, cp15.tfsr_el[1]) }, + { .name = "TFSR_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 6, .crm = 5, .opc2 = 0, + .access = PL2_RW, .accessfn = access_mte, + .fieldoffset = offsetof(CPUARMState, cp15.tfsr_el[2]) }, + { .name = "TFSR_EL3", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 6, .crn = 6, .crm = 6, .opc2 = 0, + .access = PL3_RW, + .fieldoffset = offsetof(CPUARMState, cp15.tfsr_el[3]) }, + { .name = "RGSR_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 5, + .access = PL1_RW, .accessfn = access_mte, + .fieldoffset = offsetof(CPUARMState, cp15.rgsr_el1) }, + { .name = "GCR_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 6, + .access = PL1_RW, .accessfn = access_mte, + .fieldoffset = offsetof(CPUARMState, cp15.gcr_el1) }, + { .name = "TCO", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 4, .crm = 2, .opc2 = 7, + .type = ARM_CP_NO_RAW, + .access = PL0_RW, .readfn = tco_read, .writefn = tco_write }, + { .name = "GMID_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 1, .crn = 0, .crm = 0, .opc2 = 4, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = GMID_EL1_BS }, + REGINFO_SENTINEL +}; #endif void register_cp_regs_for_features(ARMCPU *cpu) @@ -6577,6 +6640,9 @@ void register_cp_regs_for_features(ARMCPU *cpu) if (cpu_isar_feature(aa64_pauth, cpu)) { define_arm_cp_regs(cpu, pauth_reginfo); } + if (cpu_isar_feature(aa64_mte_insn_reg, cpu)) { + define_arm_cp_regs(cpu, mte_reginfo); + } #endif } diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index 3950067b79..f397603688 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -1666,6 +1666,17 @@ static void handle_msr_i(DisasContext *s, uint32_t insn, s->base.is_jmp = DISAS_UPDATE; break; + case 0x1c: /* TCO */ + if (!dc_isar_feature(aa64_mte_insn_reg, s)) { + goto do_unallocated; + } + if (crm & 1) { + set_pstate_bits(PSTATE_TCO); + } else { + clear_pstate_bits(PSTATE_TCO); + } + break; + default: do_unallocated: unallocated_encoding(s);