diff options
Diffstat (limited to 'target/arm')
| -rw-r--r-- | target/arm/cpregs-pmu.c | 29 | ||||
| -rw-r--r-- | target/arm/debug_helper.c | 29 | ||||
| -rw-r--r-- | target/arm/gdbstub64.c | 35 |
3 files changed, 81 insertions, 12 deletions
diff --git a/target/arm/cpregs-pmu.c b/target/arm/cpregs-pmu.c index 0f295b1376..9c4431c18b 100644 --- a/target/arm/cpregs-pmu.c +++ b/target/arm/cpregs-pmu.c @@ -1067,11 +1067,6 @@ static const ARMCPRegInfo v7_pm_reginfo[] = { .fgt = FGT_PMSELR_EL0, .fieldoffset = offsetof(CPUARMState, cp15.c9_pmselr), .writefn = pmselr_write, .raw_writefn = raw_write, }, - { .name = "PMCCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 0, - .access = PL0_RW, .resetvalue = 0, .type = ARM_CP_ALIAS | ARM_CP_IO, - .fgt = FGT_PMCCNTR_EL0, - .readfn = pmccntr_read, .writefn = pmccntr_write32, - .accessfn = pmreg_access_ccntr }, { .name = "PMCCNTR_EL0", .state = ARM_CP_STATE_AA64, .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 13, .opc2 = 0, .access = PL0_RW, .accessfn = pmreg_access_ccntr, @@ -1211,6 +1206,23 @@ void define_pm_cpregs(ARMCPU *cpu) define_one_arm_cp_reg(cpu, &pmcr); define_one_arm_cp_reg(cpu, &pmcr64); define_arm_cp_regs(cpu, v7_pm_reginfo); + /* + * 32-bit AArch32 PMCCNTR. We don't expose this to GDB if the + * new-in-v8 PMUv3 64-bit AArch32 PMCCNTR register is implemented + * (as that will provide the GDB user's view of "PMCCNTR"). + */ + ARMCPRegInfo pmccntr = { + .name = "PMCCNTR", + .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 0, + .access = PL0_RW, .accessfn = pmreg_access_ccntr, + .resetvalue = 0, .type = ARM_CP_ALIAS | ARM_CP_IO, + .fgt = FGT_PMCCNTR_EL0, + .readfn = pmccntr_read, .writefn = pmccntr_write32, + }; + if (arm_feature(env, ARM_FEATURE_V8)) { + pmccntr.type |= ARM_CP_NO_GDB; + } + define_one_arm_cp_reg(cpu, &pmccntr); for (unsigned i = 0, pmcrn = pmu_num_counters(env); i < pmcrn; i++) { g_autofree char *pmevcntr_name = g_strdup_printf("PMEVCNTR%d", i); @@ -1276,6 +1288,13 @@ void define_pm_cpregs(ARMCPU *cpu) .access = PL0_R, .accessfn = pmreg_access, .type = ARM_CP_CONST, .fgt = FGT_PMCEIDN_EL0, .resetvalue = cpu->pmceid1 }, + /* AArch32 64-bit PMCCNTR view: added in PMUv3 with Armv8 */ + { .name = "PMCCNTR", .state = ARM_CP_STATE_AA32, + .cp = 15, .crm = 9, .opc1 = 0, + .access = PL0_RW, .accessfn = pmreg_access_ccntr, .resetvalue = 0, + .type = ARM_CP_ALIAS | ARM_CP_IO | ARM_CP_64BIT, + .fgt = FGT_PMCCNTR_EL0, .readfn = pmccntr_read, + .writefn = pmccntr_write, }, }; define_arm_cp_regs(cpu, v8_pm_reginfo); } diff --git a/target/arm/debug_helper.c b/target/arm/debug_helper.c index aee06d4d42..579516e154 100644 --- a/target/arm/debug_helper.c +++ b/target/arm/debug_helper.c @@ -940,6 +940,13 @@ static void dbgclaimclr_write(CPUARMState *env, const ARMCPRegInfo *ri, env->cp15.dbgclaim &= ~(value & 0xFF); } +static CPAccessResult access_bogus(CPUARMState *env, const ARMCPRegInfo *ri, + bool isread) +{ + /* Always UNDEF, as if this cpreg didn't exist */ + return CP_ACCESS_UNDEFINED; +} + static const ARMCPRegInfo debug_cp_reginfo[] = { /* * DBGDRAR, DBGDSAR: always RAZ since we don't implement memory mapped @@ -1003,6 +1010,28 @@ static const ARMCPRegInfo debug_cp_reginfo[] = { .access = PL0_RW, .accessfn = access_tdcc, .type = ARM_CP_CONST, .resetvalue = 0 }, /* + * This is not a real AArch32 register. We used to incorrectly expose + * this due to a QEMU bug; to avoid breaking migration compatibility we + * need to continue to provide it so that we don't fail the inbound + * migration when it tells us about a sysreg that we don't have. + * We set an always-fails .accessfn, which means that the guest doesn't + * actually see this register (it will always UNDEF, identically to if + * there were no cpreg definition for it other than that we won't print + * a LOG_UNIMP message about it), and we set the ARM_CP_NO_GDB flag so the + * gdbstub won't see it either. + * (We can't just set .access = 0, because add_cpreg_to_hashtable() + * helpfully ignores cpregs which aren't accessible to the highest + * implemented EL.) + * + * TODO: implement a system for being able to describe "this register + * can be ignored if it appears in the inbound stream"; then we can + * remove this temporary hack. + */ + { .name = "BOGUS_DBGDTR_EL0", .state = ARM_CP_STATE_AA32, + .cp = 14, .opc1 = 3, .crn = 0, .crm = 5, .opc2 = 0, + .access = PL0_RW, .accessfn = access_bogus, + .type = ARM_CP_CONST | ARM_CP_NO_GDB, .resetvalue = 0 }, + /* * OSECCR_EL1 provides a mechanism for an operating system * to access the contents of EDECCR. EDECCR is not implemented though, * as is the rest of external device mechanism. diff --git a/target/arm/gdbstub64.c b/target/arm/gdbstub64.c index 64ee9b3b56..08e2858539 100644 --- a/target/arm/gdbstub64.c +++ b/target/arm/gdbstub64.c @@ -115,8 +115,22 @@ int aarch64_gdb_set_fpu_reg(CPUState *cs, uint8_t *buf, int reg) /* 128 bit FP register */ { uint64_t *q = aa64_vfp_qreg(env, reg); - q[0] = ldq_le_p(buf); - q[1] = ldq_le_p(buf + 8); + + /* + * On the wire these are target-endian 128 bit values. + * In the CPU state these are host-order uint64_t values + * with the least-significant one first. This means they're + * the other way around for target_big_endian() (which is + * only true for us for aarch64_be-linux-user). + */ + if (target_big_endian()) { + q[1] = ldq_p(buf); + q[0] = ldq_p(buf + 8); + } else{ + q[0] = ldq_p(buf); + q[1] = ldq_p(buf + 8); + } + return 16; } case 32: @@ -192,10 +206,17 @@ int aarch64_gdb_set_sve_reg(CPUState *cs, uint8_t *buf, int reg) case 0 ... 31: { int vq, len = 0; - uint64_t *p = (uint64_t *) buf; for (vq = 0; vq < cpu->sve_max_vq; vq++) { - env->vfp.zregs[reg].d[vq * 2 + 1] = *p++; - env->vfp.zregs[reg].d[vq * 2] = *p++; + if (target_big_endian()) { + env->vfp.zregs[reg].d[vq * 2 + 1] = ldq_p(buf); + buf += 8; + env->vfp.zregs[reg].d[vq * 2] = ldq_p(buf); + } else{ + env->vfp.zregs[reg].d[vq * 2] = ldq_p(buf); + buf += 8; + env->vfp.zregs[reg].d[vq * 2 + 1] = ldq_p(buf); + } + buf += 8; len += 16; } return len; @@ -210,9 +231,9 @@ int aarch64_gdb_set_sve_reg(CPUState *cs, uint8_t *buf, int reg) { int preg = reg - 34; int vq, len = 0; - uint64_t *p = (uint64_t *) buf; for (vq = 0; vq < cpu->sve_max_vq; vq = vq + 4) { - env->vfp.pregs[preg].p[vq / 4] = *p++; + env->vfp.pregs[preg].p[vq / 4] = ldq_p(buf); + buf += 8; len += 8; } return len; |