| Message ID | 1529699547-17044-9-git-send-email-alindsay@codeaurora.org |
|---|---|
| State | New |
| Headers | show |
| Series | More fully implement ARM PMUv3 | expand |
On 22 June 2018 at 21:32, Aaron Lindsay <alindsay@codeaurora.org> wrote: > Add arrays to hold the registers, the definitions themselves, access > functions, and logic to reset counters when PMCR.P is set. Update > filtering code to support counters other than PMCCNTR. > > Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org> > --- > target/arm/cpu.h | 3 + > target/arm/helper.c | 224 +++++++++++++++++++++++++++++++++++++++++++++++----- > 2 files changed, 209 insertions(+), 18 deletions(-) > > diff --git a/target/arm/cpu.h b/target/arm/cpu.h > index 430b8d5..c240b38 100644 > --- a/target/arm/cpu.h > +++ b/target/arm/cpu.h > @@ -481,6 +481,9 @@ typedef struct CPUARMState { > * pmccntr_op_finish. > */ > uint64_t c15_ccnt_delta; > + uint64_t c14_pmevcntr[31]; > + uint64_t c14_pmevcntr_delta[31]; > + uint64_t c14_pmevtyper[31]; > uint64_t pmccfiltr_el0; /* Performance Monitor Filter Register */ > uint64_t vpidr_el2; /* Virtualization Processor ID Register */ > uint64_t vmpidr_el2; /* Virtualization Multiprocessor ID Register */ > diff --git a/target/arm/helper.c b/target/arm/helper.c > index 9f81747..f1fd21c 100644 > --- a/target/arm/helper.c > +++ b/target/arm/helper.c > @@ -938,6 +938,7 @@ static const ARMCPRegInfo v6_cp_reginfo[] = { > #define PMCRDP 0x10 > #define PMCRD 0x8 > #define PMCRC 0x4 > +#define PMCRP 0x2 > #define PMCRE 0x1 > > #define PMXEVTYPER_P 0x80000000 > @@ -1120,9 +1121,11 @@ static inline bool pmu_counter_enabled(CPUARMState *env, uint8_t counter) > prohibited = env->cp15.c9_pmcr & PMCRDP; > } > > - /* TODO Remove assert, set filter to correct PMEVTYPER */ > - assert(counter == 31); > - filter = env->cp15.pmccfiltr_el0; > + if (counter == 31) { > + filter = env->cp15.pmccfiltr_el0; > + } else { > + filter = env->cp15.c14_pmevtyper[counter]; > + } > > p = filter & PMXEVTYPER_P; > u = filter & PMXEVTYPER_U; > @@ -1142,6 +1145,21 @@ static inline bool pmu_counter_enabled(CPUARMState *env, uint8_t counter) > filtered = m != p; > } > > + if (counter != 31) { > + /* If not checking PMCCNTR, ensure the counter is setup to an event we > + * support */ Please use the right format for multiline comments (here and below). > static void pmuserenr_write(CPUARMState *env, const ARMCPRegInfo *ri, > uint64_t value) > { > @@ -1552,16 +1698,23 @@ static const ARMCPRegInfo v7_cp_reginfo[] = { > .fieldoffset = offsetof(CPUARMState, cp15.pmccfiltr_el0), > .resetvalue = 0, }, > { .name = "PMXEVTYPER", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 1, > - .access = PL0_RW, .type = ARM_CP_NO_RAW, .accessfn = pmreg_access, > + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, > + .accessfn = pmreg_access, > .writefn = pmxevtyper_write, .readfn = pmxevtyper_read }, > { .name = "PMXEVTYPER_EL0", .state = ARM_CP_STATE_AA64, > .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 13, .opc2 = 1, > - .access = PL0_RW, .type = ARM_CP_NO_RAW, .accessfn = pmreg_access, > + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, > + .accessfn = pmreg_access, > .writefn = pmxevtyper_write, .readfn = pmxevtyper_read }, > - /* Unimplemented, RAZ/WI. */ > { .name = "PMXEVCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 2, > - .access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0, > - .accessfn = pmreg_access_xevcntr }, > + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, > + .accessfn = pmreg_access_xevcntr, > + .writefn = pmxevcntr_write, .readfn = pmxevcntr_read }, > + { .name = "PMXEVCNTR_EL0", .state = ARM_CP_STATE_AA64, > + .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 13, .opc2 = 2, > + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, > + .accessfn = pmreg_access_xevcntr, > + .writefn = pmxevcntr_write, .readfn = pmxevcntr_read }, > { .name = "PMUSERENR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 0, > .access = PL0_R | PL1_RW, .accessfn = access_tpm, > .fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmuserenr), > @@ -4250,7 +4403,7 @@ static const ARMCPRegInfo el2_cp_reginfo[] = { > #endif > /* The only field of MDCR_EL2 that has a defined architectural reset value > * is MDCR_EL2.HPMN which should reset to the value of PMCR_EL0.N; but we > - * don't impelment any PMU event counters, so using zero as a reset > + * don't implement any PMU event counters, so using zero as a reset > * value for MDCR_EL2 is okay > */ > { .name = "MDCR_EL2", .state = ARM_CP_STATE_BOTH, > @@ -5062,6 +5215,7 @@ void register_cp_regs_for_features(ARMCPU *cpu) > define_arm_cp_regs(cpu, pmovsset_cp_reginfo); > } > if (arm_feature(env, ARM_FEATURE_V7)) { > + unsigned int i; > /* v7 performance monitor control register: same implementor > * field as main ID register, and we implement only the cycle > * count register. > @@ -5086,6 +5240,40 @@ void register_cp_regs_for_features(ARMCPU *cpu) > }; > define_one_arm_cp_reg(cpu, &pmcr); > define_one_arm_cp_reg(cpu, &pmcr64); > + for (i = 0; i < 31; i++) { > + char *pmevcntr_name = g_strdup_printf("PMEVCNTR%d", i); > + char *pmevcntr_el0_name = g_strdup_printf("PMEVCNTR%d_EL0", i); > + char *pmevtyper_name = g_strdup_printf("PMEVTYPER%d", i); > + char *pmevtyper_el0_name = g_strdup_printf("PMEVTYPER%d_EL0", i); > + ARMCPRegInfo pmev_regs[] = { > + { .name = pmevcntr_name, .cp = 15, .crn = 15, > + .crm = 8 | (3 & (i >> 3)), .opc1 = 0, .opc2 = i & 7, > + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, > + .readfn = pmevcntr_readfn, .writefn = pmevcntr_writefn, > + .accessfn = pmreg_access }, > + { .name = pmevcntr_el0_name, .state = ARM_CP_STATE_AA64, > + .opc0 = 3, .opc1 = 3, .crn = 15, .crm = 8 | (3 & (i >> 3)), > + .opc2 = i & 7, .access = PL0_RW, .accessfn = pmreg_access, > + .type = ARM_CP_NO_RAW | ARM_CP_IO, > + .readfn = pmevcntr_readfn, .writefn = pmevcntr_writefn }, > + { .name = pmevtyper_name, .cp = 15, .crn = 15, > + .crm = 12 | (3 & (i >> 3)), .opc1 = 0, .opc2 = i & 7, > + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, > + .readfn = pmevtyper_readfn, .writefn = pmevtyper_writefn, > + .accessfn = pmreg_access }, > + { .name = pmevtyper_el0_name, .state = ARM_CP_STATE_AA64, > + .opc0 = 3, .opc1 = 3, .crn = 15, .crm = 12 | (3 & (i >> 3)), > + .opc2 = i & 7, .access = PL0_RW, .accessfn = pmreg_access, > + .type = ARM_CP_NO_RAW | ARM_CP_IO, > + .readfn = pmevtyper_readfn, .writefn = pmevtyper_writefn }, > + REGINFO_SENTINEL > + }; > + define_arm_cp_regs(cpu, pmev_regs); > + g_free(pmevcntr_name); > + g_free(pmevcntr_el0_name); > + g_free(pmevtyper_name); > + g_free(pmevtyper_el0_name); > + } > #endif Because all these registers are marked as NO_RAW we're going to fail to migrate their state, I think. This patchset in general needs to address how the extra CPU state involved with the PMU is going to be migrated. thanks -- PMM
On Jul 17 17:17, Peter Maydell wrote: > On 22 June 2018 at 21:32, Aaron Lindsay <alindsay@codeaurora.org> wrote: > > Add arrays to hold the registers, the definitions themselves, access > > functions, and logic to reset counters when PMCR.P is set. Update > > filtering code to support counters other than PMCCNTR. > > > > Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org> > > --- > > target/arm/cpu.h | 3 + > > target/arm/helper.c | 224 +++++++++++++++++++++++++++++++++++++++++++++++----- > > 2 files changed, 209 insertions(+), 18 deletions(-) > > > > diff --git a/target/arm/cpu.h b/target/arm/cpu.h > > index 430b8d5..c240b38 100644 > > --- a/target/arm/cpu.h > > +++ b/target/arm/cpu.h > > @@ -481,6 +481,9 @@ typedef struct CPUARMState { > > * pmccntr_op_finish. > > */ > > uint64_t c15_ccnt_delta; > > + uint64_t c14_pmevcntr[31]; > > + uint64_t c14_pmevcntr_delta[31]; > > + uint64_t c14_pmevtyper[31]; > > uint64_t pmccfiltr_el0; /* Performance Monitor Filter Register */ > > uint64_t vpidr_el2; /* Virtualization Processor ID Register */ > > uint64_t vmpidr_el2; /* Virtualization Multiprocessor ID Register */ > > diff --git a/target/arm/helper.c b/target/arm/helper.c > > index 9f81747..f1fd21c 100644 > > --- a/target/arm/helper.c > > +++ b/target/arm/helper.c > > @@ -938,6 +938,7 @@ static const ARMCPRegInfo v6_cp_reginfo[] = { > > #define PMCRDP 0x10 > > #define PMCRD 0x8 > > #define PMCRC 0x4 > > +#define PMCRP 0x2 > > #define PMCRE 0x1 > > > > #define PMXEVTYPER_P 0x80000000 > > @@ -1120,9 +1121,11 @@ static inline bool pmu_counter_enabled(CPUARMState *env, uint8_t counter) > > prohibited = env->cp15.c9_pmcr & PMCRDP; > > } > > > > - /* TODO Remove assert, set filter to correct PMEVTYPER */ > > - assert(counter == 31); > > - filter = env->cp15.pmccfiltr_el0; > > + if (counter == 31) { > > + filter = env->cp15.pmccfiltr_el0; > > + } else { > > + filter = env->cp15.c14_pmevtyper[counter]; > > + } > > > > p = filter & PMXEVTYPER_P; > > u = filter & PMXEVTYPER_U; > > @@ -1142,6 +1145,21 @@ static inline bool pmu_counter_enabled(CPUARMState *env, uint8_t counter) > > filtered = m != p; > > } > > > > + if (counter != 31) { > > + /* If not checking PMCCNTR, ensure the counter is setup to an event we > > + * support */ > > Please use the right format for multiline comments (here and below). Fixed. > > > static void pmuserenr_write(CPUARMState *env, const ARMCPRegInfo *ri, > > uint64_t value) > > { > > @@ -1552,16 +1698,23 @@ static const ARMCPRegInfo v7_cp_reginfo[] = { > > .fieldoffset = offsetof(CPUARMState, cp15.pmccfiltr_el0), > > .resetvalue = 0, }, > > { .name = "PMXEVTYPER", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 1, > > - .access = PL0_RW, .type = ARM_CP_NO_RAW, .accessfn = pmreg_access, > > + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, > > + .accessfn = pmreg_access, > > .writefn = pmxevtyper_write, .readfn = pmxevtyper_read }, > > { .name = "PMXEVTYPER_EL0", .state = ARM_CP_STATE_AA64, > > .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 13, .opc2 = 1, > > - .access = PL0_RW, .type = ARM_CP_NO_RAW, .accessfn = pmreg_access, > > + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, > > + .accessfn = pmreg_access, > > .writefn = pmxevtyper_write, .readfn = pmxevtyper_read }, > > - /* Unimplemented, RAZ/WI. */ > > { .name = "PMXEVCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 2, > > - .access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0, > > - .accessfn = pmreg_access_xevcntr }, > > + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, > > + .accessfn = pmreg_access_xevcntr, > > + .writefn = pmxevcntr_write, .readfn = pmxevcntr_read }, > > + { .name = "PMXEVCNTR_EL0", .state = ARM_CP_STATE_AA64, > > + .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 13, .opc2 = 2, > > + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, > > + .accessfn = pmreg_access_xevcntr, > > + .writefn = pmxevcntr_write, .readfn = pmxevcntr_read }, > > { .name = "PMUSERENR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 0, > > .access = PL0_R | PL1_RW, .accessfn = access_tpm, > > .fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmuserenr), > > @@ -4250,7 +4403,7 @@ static const ARMCPRegInfo el2_cp_reginfo[] = { > > #endif > > /* The only field of MDCR_EL2 that has a defined architectural reset value > > * is MDCR_EL2.HPMN which should reset to the value of PMCR_EL0.N; but we > > - * don't impelment any PMU event counters, so using zero as a reset > > + * don't implement any PMU event counters, so using zero as a reset > > * value for MDCR_EL2 is okay > > */ > > { .name = "MDCR_EL2", .state = ARM_CP_STATE_BOTH, > > @@ -5062,6 +5215,7 @@ void register_cp_regs_for_features(ARMCPU *cpu) > > define_arm_cp_regs(cpu, pmovsset_cp_reginfo); > > } > > if (arm_feature(env, ARM_FEATURE_V7)) { > > + unsigned int i; > > /* v7 performance monitor control register: same implementor > > * field as main ID register, and we implement only the cycle > > * count register. > > @@ -5086,6 +5240,40 @@ void register_cp_regs_for_features(ARMCPU *cpu) > > }; > > define_one_arm_cp_reg(cpu, &pmcr); > > define_one_arm_cp_reg(cpu, &pmcr64); > > + for (i = 0; i < 31; i++) { > > + char *pmevcntr_name = g_strdup_printf("PMEVCNTR%d", i); > > + char *pmevcntr_el0_name = g_strdup_printf("PMEVCNTR%d_EL0", i); > > + char *pmevtyper_name = g_strdup_printf("PMEVTYPER%d", i); > > + char *pmevtyper_el0_name = g_strdup_printf("PMEVTYPER%d_EL0", i); > > + ARMCPRegInfo pmev_regs[] = { > > + { .name = pmevcntr_name, .cp = 15, .crn = 15, > > + .crm = 8 | (3 & (i >> 3)), .opc1 = 0, .opc2 = i & 7, > > + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, > > + .readfn = pmevcntr_readfn, .writefn = pmevcntr_writefn, > > + .accessfn = pmreg_access }, > > + { .name = pmevcntr_el0_name, .state = ARM_CP_STATE_AA64, > > + .opc0 = 3, .opc1 = 3, .crn = 15, .crm = 8 | (3 & (i >> 3)), > > + .opc2 = i & 7, .access = PL0_RW, .accessfn = pmreg_access, > > + .type = ARM_CP_NO_RAW | ARM_CP_IO, > > + .readfn = pmevcntr_readfn, .writefn = pmevcntr_writefn }, > > + { .name = pmevtyper_name, .cp = 15, .crn = 15, > > + .crm = 12 | (3 & (i >> 3)), .opc1 = 0, .opc2 = i & 7, > > + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, > > + .readfn = pmevtyper_readfn, .writefn = pmevtyper_writefn, > > + .accessfn = pmreg_access }, > > + { .name = pmevtyper_el0_name, .state = ARM_CP_STATE_AA64, > > + .opc0 = 3, .opc1 = 3, .crn = 15, .crm = 12 | (3 & (i >> 3)), > > + .opc2 = i & 7, .access = PL0_RW, .accessfn = pmreg_access, > > + .type = ARM_CP_NO_RAW | ARM_CP_IO, > > + .readfn = pmevtyper_readfn, .writefn = pmevtyper_writefn }, > > + REGINFO_SENTINEL > > + }; > > + define_arm_cp_regs(cpu, pmev_regs); > > + g_free(pmevcntr_name); > > + g_free(pmevcntr_el0_name); > > + g_free(pmevtyper_name); > > + g_free(pmevtyper_el0_name); > > + } > > #endif > > Because all these registers are marked as NO_RAW we're going to fail > to migrate their state, I think. A bad copy-paste job from the PMXEVCNTR variants, I'll warrant. Fixed now. > This patchset in general needs to address how the extra CPU state > involved with the PMU is going to be migrated. I've now commented elsewhere about general ideas for migration, but I'm wondering if there is a good way to set up unit tests for this code because I don't trust myself to get migration right (in particular because it's not my use case, so I won't be "naturally" testing it on my own). -Aaron
diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 430b8d5..c240b38 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -481,6 +481,9 @@ typedef struct CPUARMState { * pmccntr_op_finish. */ uint64_t c15_ccnt_delta; + uint64_t c14_pmevcntr[31]; + uint64_t c14_pmevcntr_delta[31]; + uint64_t c14_pmevtyper[31]; uint64_t pmccfiltr_el0; /* Performance Monitor Filter Register */ uint64_t vpidr_el2; /* Virtualization Processor ID Register */ uint64_t vmpidr_el2; /* Virtualization Multiprocessor ID Register */ diff --git a/target/arm/helper.c b/target/arm/helper.c index 9f81747..f1fd21c 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -938,6 +938,7 @@ static const ARMCPRegInfo v6_cp_reginfo[] = { #define PMCRDP 0x10 #define PMCRD 0x8 #define PMCRC 0x4 +#define PMCRP 0x2 #define PMCRE 0x1 #define PMXEVTYPER_P 0x80000000 @@ -1120,9 +1121,11 @@ static inline bool pmu_counter_enabled(CPUARMState *env, uint8_t counter) prohibited = env->cp15.c9_pmcr & PMCRDP; } - /* TODO Remove assert, set filter to correct PMEVTYPER */ - assert(counter == 31); - filter = env->cp15.pmccfiltr_el0; + if (counter == 31) { + filter = env->cp15.pmccfiltr_el0; + } else { + filter = env->cp15.c14_pmevtyper[counter]; + } p = filter & PMXEVTYPER_P; u = filter & PMXEVTYPER_U; @@ -1142,6 +1145,21 @@ static inline bool pmu_counter_enabled(CPUARMState *env, uint8_t counter) filtered = m != p; } + if (counter != 31) { + /* If not checking PMCCNTR, ensure the counter is setup to an event we + * support */ + uint16_t event = filter & PMXEVTYPER_EVTCOUNT; + if (event > 0x3f) { + return false; /* We only support common architectural and + microarchitectural events */ + } + + uint16_t event_idx = supported_event_map[event]; + if (event_idx == SUPPORTED_EVENT_SENTINEL) { + return false; + } + } + return enabled && !prohibited && !filtered; } @@ -1188,14 +1206,44 @@ void pmccntr_op_finish(CPUARMState *env) } } +static void pmevcntr_op_start(CPUARMState *env, uint8_t counter) +{ + + uint16_t event = env->cp15.c14_pmevtyper[counter] & PMXEVTYPER_EVTCOUNT; + uint16_t event_idx = supported_event_map[event]; + uint64_t count = pm_events[event_idx].get_count(env); + + if (pmu_counter_enabled(env, counter)) { + env->cp15.c14_pmevcntr[counter] = + count - env->cp15.c14_pmevcntr_delta[counter]; + } + env->cp15.c14_pmevcntr_delta[counter] = count; +} + +static void pmevcntr_op_finish(CPUARMState *env, uint8_t counter) +{ + if (pmu_counter_enabled(env, counter)) { + env->cp15.c14_pmevcntr_delta[counter] -= + env->cp15.c14_pmevcntr[counter]; + } +} + void pmu_op_start(CPUARMState *env) { + unsigned int i; pmccntr_op_start(env); + for (i = 0; i < pmu_num_counters(env); i++) { + pmevcntr_op_start(env, i); + } } void pmu_op_finish(CPUARMState *env) { + unsigned int i; pmccntr_op_finish(env); + for (i = 0; i < pmu_num_counters(env); i++) { + pmevcntr_op_finish(env, i); + } } void pmu_pre_el_change(ARMCPU *cpu, void *ignored) @@ -1218,6 +1266,13 @@ static void pmcr_write(CPUARMState *env, const ARMCPRegInfo *ri, env->cp15.c15_ccnt = 0; } + if (value & PMCRP) { + unsigned int i; + for (i = 0; i < pmu_num_counters(env); i++) { + env->cp15.c14_pmevcntr[i] = 0; + } + } + /* only the DP, X, D and E bits are writable */ env->cp15.c9_pmcr &= ~0x39; env->cp15.c9_pmcr |= (value & 0x39); @@ -1271,6 +1326,14 @@ void pmccntr_op_finish(CPUARMState *env) { } +void pmevcntr_op_start(CPUARMState *env, uint8_t i) +{ +} + +void pmevcntr_op_finish(CPUARMState *env, uint8_t i) +{ +} + void pmu_op_start(CPUARMState *env) { } @@ -1341,30 +1404,113 @@ static void pmovsset_write(CPUARMState *env, const ARMCPRegInfo *ri, env->cp15.c9_pmovsr |= value; } -static void pmxevtyper_write(CPUARMState *env, const ARMCPRegInfo *ri, - uint64_t value) +static void pmevtyper_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value, const uint8_t counter) { + if (counter == 0x1f) { + pmccfiltr_write(env, ri, value); + } else if (counter < pmu_num_counters(env)) { + pmevcntr_op_start(env, counter); + env->cp15.c14_pmevtyper[counter] = value & 0xfe0003ff; + pmevcntr_op_finish(env, counter); + } /* Attempts to access PMXEVTYPER are CONSTRAINED UNPREDICTABLE when * PMSELR value is equal to or greater than the number of implemented * counters, but not equal to 0x1f. We opt to behave as a RAZ/WI. */ - if (env->cp15.c9_pmselr == 0x1f) { - pmccfiltr_write(env, ri, value); +} + +static uint64_t pmevtyper_read(CPUARMState *env, const ARMCPRegInfo *ri, + const uint8_t counter) +{ + if (counter == 0x1f) { + return env->cp15.pmccfiltr_el0; + } else if (counter < pmu_num_counters(env)) { + return env->cp15.c14_pmevtyper[counter]; + } else { + /* We opt to behave as a RAZ/WI when attempts to access PMXEVTYPER + * are CONSTRAINED UNPREDICTABLE. See comments in pmevtyper_write(). + */ + return 0; } } +static void pmevtyper_writefn(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + uint8_t counter = ((ri->crm & 3) << 3) | (ri->opc2 & 7); + pmevtyper_write(env, ri, value, counter); +} + +static uint64_t pmevtyper_readfn(CPUARMState *env, const ARMCPRegInfo *ri) +{ + uint8_t counter = ((ri->crm & 3) << 3) | (ri->opc2 & 7); + return pmevtyper_read(env, ri, counter); +} + +static void pmxevtyper_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + pmevtyper_write(env, ri, value, env->cp15.c9_pmselr & 31); +} + static uint64_t pmxevtyper_read(CPUARMState *env, const ARMCPRegInfo *ri) { - /* We opt to behave as a RAZ/WI when attempts to access PMXEVTYPER - * are CONSTRAINED UNPREDICTABLE. See comments in pmxevtyper_write(). - */ - if (env->cp15.c9_pmselr == 0x1f) { - return env->cp15.pmccfiltr_el0; + return pmevtyper_read(env, ri, env->cp15.c9_pmselr & 31); +} + +static void pmevcntr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value, uint8_t counter) +{ + if (counter < pmu_num_counters(env)) { + pmevcntr_op_start(env, counter); + env->cp15.c14_pmevcntr[counter] = value; + pmevcntr_op_finish(env, counter); + } + /* We opt to behave as a RAZ/WI when attempts to access PM[X]EVCNTR + * are CONSTRAINED UNPREDICTABLE. */ +} + +static uint64_t pmevcntr_read(CPUARMState *env, const ARMCPRegInfo *ri, + uint8_t counter) +{ + if (counter < pmu_num_counters(env)) { + uint64_t ret; + pmevcntr_op_start(env, counter); + ret = env->cp15.c14_pmevcntr[counter]; + pmevcntr_op_finish(env, counter); + return ret; } else { + /* We opt to behave as a RAZ/WI when attempts to access PM[X]EVCNTR + * are CONSTRAINED UNPREDICTABLE. */ return 0; } } +static void pmevcntr_writefn(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + uint8_t counter = ((ri->crm & 3) << 3) | (ri->opc2 & 7); + pmevcntr_write(env, ri, value, counter); +} + +static uint64_t pmevcntr_readfn(CPUARMState *env, const ARMCPRegInfo *ri) +{ + uint8_t counter = ((ri->crm & 3) << 3) | (ri->opc2 & 7); + return pmevcntr_read(env, ri, counter); +} + +static void pmxevcntr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + pmevcntr_write(env, ri, value, env->cp15.c9_pmselr & 31); +} + +static uint64_t pmxevcntr_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + return pmevcntr_read(env, ri, env->cp15.c9_pmselr & 31); +} + static void pmuserenr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) { @@ -1552,16 +1698,23 @@ static const ARMCPRegInfo v7_cp_reginfo[] = { .fieldoffset = offsetof(CPUARMState, cp15.pmccfiltr_el0), .resetvalue = 0, }, { .name = "PMXEVTYPER", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 1, - .access = PL0_RW, .type = ARM_CP_NO_RAW, .accessfn = pmreg_access, + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, + .accessfn = pmreg_access, .writefn = pmxevtyper_write, .readfn = pmxevtyper_read }, { .name = "PMXEVTYPER_EL0", .state = ARM_CP_STATE_AA64, .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 13, .opc2 = 1, - .access = PL0_RW, .type = ARM_CP_NO_RAW, .accessfn = pmreg_access, + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, + .accessfn = pmreg_access, .writefn = pmxevtyper_write, .readfn = pmxevtyper_read }, - /* Unimplemented, RAZ/WI. */ { .name = "PMXEVCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 2, - .access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0, - .accessfn = pmreg_access_xevcntr }, + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, + .accessfn = pmreg_access_xevcntr, + .writefn = pmxevcntr_write, .readfn = pmxevcntr_read }, + { .name = "PMXEVCNTR_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 13, .opc2 = 2, + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, + .accessfn = pmreg_access_xevcntr, + .writefn = pmxevcntr_write, .readfn = pmxevcntr_read }, { .name = "PMUSERENR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 0, .access = PL0_R | PL1_RW, .accessfn = access_tpm, .fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmuserenr), @@ -4250,7 +4403,7 @@ static const ARMCPRegInfo el2_cp_reginfo[] = { #endif /* The only field of MDCR_EL2 that has a defined architectural reset value * is MDCR_EL2.HPMN which should reset to the value of PMCR_EL0.N; but we - * don't impelment any PMU event counters, so using zero as a reset + * don't implement any PMU event counters, so using zero as a reset * value for MDCR_EL2 is okay */ { .name = "MDCR_EL2", .state = ARM_CP_STATE_BOTH, @@ -5062,6 +5215,7 @@ void register_cp_regs_for_features(ARMCPU *cpu) define_arm_cp_regs(cpu, pmovsset_cp_reginfo); } if (arm_feature(env, ARM_FEATURE_V7)) { + unsigned int i; /* v7 performance monitor control register: same implementor * field as main ID register, and we implement only the cycle * count register. @@ -5086,6 +5240,40 @@ void register_cp_regs_for_features(ARMCPU *cpu) }; define_one_arm_cp_reg(cpu, &pmcr); define_one_arm_cp_reg(cpu, &pmcr64); + for (i = 0; i < 31; i++) { + char *pmevcntr_name = g_strdup_printf("PMEVCNTR%d", i); + char *pmevcntr_el0_name = g_strdup_printf("PMEVCNTR%d_EL0", i); + char *pmevtyper_name = g_strdup_printf("PMEVTYPER%d", i); + char *pmevtyper_el0_name = g_strdup_printf("PMEVTYPER%d_EL0", i); + ARMCPRegInfo pmev_regs[] = { + { .name = pmevcntr_name, .cp = 15, .crn = 15, + .crm = 8 | (3 & (i >> 3)), .opc1 = 0, .opc2 = i & 7, + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, + .readfn = pmevcntr_readfn, .writefn = pmevcntr_writefn, + .accessfn = pmreg_access }, + { .name = pmevcntr_el0_name, .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 15, .crm = 8 | (3 & (i >> 3)), + .opc2 = i & 7, .access = PL0_RW, .accessfn = pmreg_access, + .type = ARM_CP_NO_RAW | ARM_CP_IO, + .readfn = pmevcntr_readfn, .writefn = pmevcntr_writefn }, + { .name = pmevtyper_name, .cp = 15, .crn = 15, + .crm = 12 | (3 & (i >> 3)), .opc1 = 0, .opc2 = i & 7, + .access = PL0_RW, .type = ARM_CP_NO_RAW | ARM_CP_IO, + .readfn = pmevtyper_readfn, .writefn = pmevtyper_writefn, + .accessfn = pmreg_access }, + { .name = pmevtyper_el0_name, .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 15, .crm = 12 | (3 & (i >> 3)), + .opc2 = i & 7, .access = PL0_RW, .accessfn = pmreg_access, + .type = ARM_CP_NO_RAW | ARM_CP_IO, + .readfn = pmevtyper_readfn, .writefn = pmevtyper_writefn }, + REGINFO_SENTINEL + }; + define_arm_cp_regs(cpu, pmev_regs); + g_free(pmevcntr_name); + g_free(pmevcntr_el0_name); + g_free(pmevtyper_name); + g_free(pmevtyper_el0_name); + } #endif ARMCPRegInfo clidr = { .name = "CLIDR", .state = ARM_CP_STATE_BOTH,
Add arrays to hold the registers, the definitions themselves, access functions, and logic to reset counters when PMCR.P is set. Update filtering code to support counters other than PMCCNTR. Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org> --- target/arm/cpu.h | 3 + target/arm/helper.c | 224 +++++++++++++++++++++++++++++++++++++++++++++++----- 2 files changed, 209 insertions(+), 18 deletions(-)