diff options
Diffstat (limited to 'target/ppc')
| -rw-r--r-- | target/ppc/cpu.h | 15 | ||||
| -rw-r--r-- | target/ppc/cpu_init.c | 24 | ||||
| -rw-r--r-- | target/ppc/meson.build | 1 | ||||
| -rw-r--r-- | target/ppc/power8-pmu.c | 62 | ||||
| -rw-r--r-- | target/ppc/power8-pmu.h | 25 |
5 files changed, 127 insertions, 0 deletions
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index c07a8e9..39fadca 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -296,6 +296,15 @@ typedef struct ppc_v3_pate_t { uint64_t dw1; } ppc_v3_pate_t; +/* PMU related structs and defines */ +#define PMU_COUNTERS_NUM 6 +typedef enum { + PMU_EVENT_INVALID = 0, + PMU_EVENT_INACTIVE, + PMU_EVENT_CYCLES, + PMU_EVENT_INSTRUCTIONS, +} PMUEventType; + /*****************************************************************************/ /* Machine state register bits definition */ #define MSR_SF 63 /* Sixty-four-bit mode hflags */ @@ -1195,6 +1204,12 @@ struct CPUPPCState { uint32_t tm_vscr; uint64_t tm_dscr; uint64_t tm_tar; + + /* + * Timers used to fire performance monitor alerts + * when counting cycles. + */ + QEMUTimer *pmu_cyc_overflow_timers[PMU_COUNTERS_NUM]; }; #define SET_FIT_PERIOD(a_, b_, c_, d_) \ diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c index c8e6868..7c47ffd 100644 --- a/target/ppc/cpu_init.c +++ b/target/ppc/cpu_init.c @@ -45,6 +45,7 @@ #include "helper_regs.h" #include "internal.h" #include "spr_tcg.h" +#include "power8-pmu.h" /* #define PPC_DEBUG_SPR */ /* #define USE_APPLE_GDB */ @@ -6810,6 +6811,20 @@ static void register_power9_mmu_sprs(CPUPPCState *env) #endif } +/* + * Initialize PMU counter overflow timers for Power8 and + * newer Power chips when using TCG. + */ +static void init_tcg_pmu_power8(CPUPPCState *env) +{ +#if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY) + /* Init PMU overflow timers */ + if (!kvm_enabled()) { + cpu_ppc_pmu_init(env); + } +#endif +} + static void init_proc_book3s_common(CPUPPCState *env) { register_ne_601_sprs(env); @@ -7127,6 +7142,9 @@ static void init_proc_POWER8(CPUPPCState *env) register_sdr1_sprs(env); register_book3s_207_dbg_sprs(env); + /* Common TCG PMU */ + init_tcg_pmu_power8(env); + /* POWER8 Specific Registers */ register_book3s_ids_sprs(env); register_rmor_sprs(env); @@ -7321,6 +7339,9 @@ static void init_proc_POWER9(CPUPPCState *env) init_proc_book3s_common(env); register_book3s_207_dbg_sprs(env); + /* Common TCG PMU */ + init_tcg_pmu_power8(env); + /* POWER8 Specific Registers */ register_book3s_ids_sprs(env); register_amr_sprs(env); @@ -7537,6 +7558,9 @@ static void init_proc_POWER10(CPUPPCState *env) init_proc_book3s_common(env); register_book3s_207_dbg_sprs(env); + /* Common TCG PMU */ + init_tcg_pmu_power8(env); + /* POWER8 Specific Registers */ register_book3s_ids_sprs(env); register_amr_sprs(env); diff --git a/target/ppc/meson.build b/target/ppc/meson.build index b85f295..a49a891 100644 --- a/target/ppc/meson.build +++ b/target/ppc/meson.build @@ -51,6 +51,7 @@ ppc_softmmu_ss.add(when: 'TARGET_PPC64', if_true: files( 'mmu-book3s-v3.c', 'mmu-hash64.c', 'mmu-radix64.c', + 'power8-pmu.c', )) target_arch += {'ppc': ppc_ss} diff --git a/target/ppc/power8-pmu.c b/target/ppc/power8-pmu.c new file mode 100644 index 0000000..d443bcb --- /dev/null +++ b/target/ppc/power8-pmu.c @@ -0,0 +1,62 @@ +/* + * PMU emulation helpers for TCG IBM POWER chips + * + * Copyright IBM Corp. 2021 + * + * Authors: + * Daniel Henrique Barboza <danielhb413@gmail.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" + +#include "power8-pmu.h" +#include "cpu.h" +#include "helper_regs.h" +#include "exec/exec-all.h" +#include "exec/helper-proto.h" +#include "qemu/error-report.h" +#include "qemu/main-loop.h" +#include "hw/ppc/ppc.h" + +#if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY) + +static void fire_PMC_interrupt(PowerPCCPU *cpu) +{ + CPUPPCState *env = &cpu->env; + + if (!(env->spr[SPR_POWER_MMCR0] & MMCR0_EBE)) { + return; + } + + /* PMC interrupt not implemented yet */ + return; +} + +static void cpu_ppc_pmu_timer_cb(void *opaque) +{ + PowerPCCPU *cpu = opaque; + + fire_PMC_interrupt(cpu); +} + +void cpu_ppc_pmu_init(CPUPPCState *env) +{ + PowerPCCPU *cpu = env_archcpu(env); + int i, sprn; + + for (sprn = SPR_POWER_PMC1; sprn <= SPR_POWER_PMC6; sprn++) { + if (sprn == SPR_POWER_PMC5) { + continue; + } + + i = sprn - SPR_POWER_PMC1; + + env->pmu_cyc_overflow_timers[i] = timer_new_ns(QEMU_CLOCK_VIRTUAL, + &cpu_ppc_pmu_timer_cb, + cpu); + } +} +#endif /* defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY) */ diff --git a/target/ppc/power8-pmu.h b/target/ppc/power8-pmu.h new file mode 100644 index 0000000..49a813a --- /dev/null +++ b/target/ppc/power8-pmu.h @@ -0,0 +1,25 @@ +/* + * PMU emulation helpers for TCG IBM POWER chips + * + * Copyright IBM Corp. 2021 + * + * Authors: + * Daniel Henrique Barboza <danielhb413@gmail.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#ifndef POWER8_PMU +#define POWER8_PMU + +#include "qemu/osdep.h" +#include "cpu.h" +#include "exec/exec-all.h" +#include "exec/helper-proto.h" +#include "qemu/error-report.h" +#include "qemu/main-loop.h" + +void cpu_ppc_pmu_init(CPUPPCState *env); + +#endif |