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target/arm: Add MTE system registers

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This is TFSRE0_EL1, TFSR_EL1, TFSR_EL2, TFSR_EL3,
RGSR_EL1, GCR_EL1, GMID_EL1, and PSTATE.TCO.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200626033144.790098-8-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2020-06-25 20:31:05 -07:00 • committed by Peter Maydell
parent 329833286d
commit 4b779cebb3
4 changed files with 128 additions and 0 deletions
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94
target/arm/helper.c
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@ -5881,6 +5881,9 @@ static void define_arm_vh_e2h_redirects_aliases(ARMCPU *cpu)
{ K(3, 0, 1, 2, 0), K(3, 4, 1, 2, 0), K(3, 5, 1, 2, 0),
"ZCR_EL1", "ZCR_EL2", "ZCR_EL12", isar_feature_aa64_sve },
{ K(3, 0, 5, 6, 0), K(3, 4, 5, 6, 0), K(3, 5, 5, 6, 0),
"TFSR_EL1", "TFSR_EL2", "TFSR_EL12", isar_feature_aa64_mte },
/* TODO: ARMv8.2-SPE -- PMSCR_EL2 */
/* TODO: ARMv8.4-Trace -- TRFCR_EL2 */
};
@ -6855,6 +6858,86 @@ static const ARMCPRegInfo dcpodp_reg[] = {
};
#endif /*CONFIG_USER_ONLY*/
static CPAccessResult access_aa64_tid5(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if ((arm_current_el(env) < 2) && (arm_hcr_el2_eff(env) & HCR_TID5)) {
return CP_ACCESS_TRAP_EL2;
}
return CP_ACCESS_OK;
}
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 = 5, .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 = 5, .crm = 6, .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 = 5, .crm = 6, .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 = 5, .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 = "GMID_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 1, .crn = 0, .crm = 0, .opc2 = 4,
.access = PL1_R, .accessfn = access_aa64_tid5,
.type = ARM_CP_CONST, .resetvalue = GMID_EL1_BS },
{ .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 },
REGINFO_SENTINEL
};
static const ARMCPRegInfo mte_tco_ro_reginfo[] = {
{ .name = "TCO", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 4, .crm = 2, .opc2 = 7,
.type = ARM_CP_CONST, .access = PL0_RW, },
REGINFO_SENTINEL
};
#endif
static CPAccessResult access_predinv(CPUARMState *env, const ARMCPRegInfo *ri,
@ -7980,6 +8063,17 @@ void register_cp_regs_for_features(ARMCPU *cpu)
}
}
#endif /*CONFIG_USER_ONLY*/
/*
* If full MTE is enabled, add all of the system registers.
* If only "instructions available at EL0" are enabled,
* then define only a RAZ/WI version of PSTATE.TCO.
*/
if (cpu_isar_feature(aa64_mte, cpu)) {
define_arm_cp_regs(cpu, mte_reginfo);
} else if (cpu_isar_feature(aa64_mte_insn_reg, cpu)) {
define_arm_cp_regs(cpu, mte_tco_ro_reginfo);
}
#endif
if (cpu_isar_feature(any_predinv, cpu)) {