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Thu, 25 Jul 2024 16:55:39 -0700 (PDT) From: Nicholas Piggin To: qemu-devel@nongnu.org Cc: Nicholas Piggin , qemu-ppc@nongnu.org, Harsh Prateek Bora Subject: [PULL 20/96] ppc/pnv: Move timebase state into PnvCore Date: Fri, 26 Jul 2024 09:52:53 +1000 Message-ID: <20240725235410.451624-21-npiggin@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240725235410.451624-1-npiggin@gmail.com> References: <20240725235410.451624-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1033; envelope-from=npiggin@gmail.com; helo=mail-pj1-x1033.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1721952239183116600 Content-Type: text/plain; charset="utf-8" The timebase state machine is per per-core state and can be driven by any thread in the core. It is currently implemented as a hack where the state is in a CPU structure and only thread 0's state is accessed by the chiptod, which limits programming the timebase side of the state machine to thread 0 of a core. Move the state out into PnvCore and share it among all threads. Reviewed-by: Harsh Prateek Bora Signed-off-by: Nicholas Piggin --- hw/ppc/pnv_chiptod.c | 7 ++--- include/hw/ppc/pnv_core.h | 17 ++++++++++ target/ppc/cpu.h | 21 ------------- target/ppc/timebase_helper.c | 60 +++++++++++++++++++++--------------- 4 files changed, 55 insertions(+), 50 deletions(-) diff --git a/hw/ppc/pnv_chiptod.c b/hw/ppc/pnv_chiptod.c index 3831a72101..1e41fe557a 100644 --- a/hw/ppc/pnv_chiptod.c +++ b/hw/ppc/pnv_chiptod.c @@ -364,8 +364,7 @@ static void pnv_chiptod_xscom_write(void *opaque, hwadd= r addr, qemu_log_mask(LOG_GUEST_ERROR, "pnv_chiptod: xscom write reg" " TOD_MOVE_TOD_TO_TB_REG with no slave target\n"= ); } else { - PowerPCCPU *cpu =3D chiptod->slave_pc_target->threads[0]; - CPUPPCState *env =3D &cpu->env; + PnvCore *pc =3D chiptod->slave_pc_target; =20 /* * Moving TOD to TB will set the TB of all threads in a @@ -377,8 +376,8 @@ static void pnv_chiptod_xscom_write(void *opaque, hwadd= r addr, * thread 0. */ =20 - if (env->pnv_tod_tbst.tb_ready_for_tod) { - env->pnv_tod_tbst.tod_sent_to_tb =3D 1; + if (pc->tod_state.tb_ready_for_tod) { + pc->tod_state.tod_sent_to_tb =3D 1; } else { qemu_log_mask(LOG_GUEST_ERROR, "pnv_chiptod: xscom write r= eg" " TOD_MOVE_TOD_TO_TB_REG with TB not ready t= o" diff --git a/include/hw/ppc/pnv_core.h b/include/hw/ppc/pnv_core.h index 29cab9dfd9..ffec8516ae 100644 --- a/include/hw/ppc/pnv_core.h +++ b/include/hw/ppc/pnv_core.h @@ -25,6 +25,20 @@ #include "hw/ppc/pnv.h" #include "qom/object.h" =20 +/* Per-core ChipTOD / TimeBase state */ +typedef struct PnvCoreTODState { + int tb_ready_for_tod; /* core TB ready to receive TOD from chiptod */ + int tod_sent_to_tb; /* chiptod sent TOD to the core TB */ + + /* + * "Timers" for async TBST events are simulated by mfTFAC because TFAC + * is polled for such events. These are just used to ensure firmware + * performs the polling at least a few times. + */ + int tb_state_timer; + int tb_sync_pulse_timer; +} PnvCoreTODState; + #define TYPE_PNV_CORE "powernv-cpu-core" OBJECT_DECLARE_TYPE(PnvCore, PnvCoreClass, PNV_CORE) @@ -38,6 +52,9 @@ struct PnvCore { uint32_t pir; uint32_t hwid; uint64_t hrmor; + + PnvCoreTODState tod_state; + PnvChip *chip; =20 MemoryRegion xscom_regs; diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index 2015e603d4..c78d6ca91a 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -1196,21 +1196,6 @@ DEXCR_ASPECT(SRAPD, 4) DEXCR_ASPECT(NPHIE, 5) DEXCR_ASPECT(PHIE, 6) =20 -/*************************************************************************= ****/ -/* PowerNV ChipTOD and TimeBase State Machine */ -struct pnv_tod_tbst { - int tb_ready_for_tod; /* core TB ready to receive TOD from chiptod */ - int tod_sent_to_tb; /* chiptod sent TOD to the core TB */ - - /* - * "Timers" for async TBST events are simulated by mfTFAC because TFAC - * is polled for such events. These are just used to ensure firmware - * performs the polling at least a few times. - */ - int tb_state_timer; - int tb_sync_pulse_timer; -}; - /*************************************************************************= ****/ /* The whole PowerPC CPU context */ =20 @@ -1291,12 +1276,6 @@ struct CPUArchState { uint32_t tlb_need_flush; /* Delayed flush needed */ #define TLB_NEED_LOCAL_FLUSH 0x1 #define TLB_NEED_GLOBAL_FLUSH 0x2 - -#if defined(TARGET_PPC64) - /* PowerNV chiptod / timebase facility state. */ - /* Would be nice to put these into PnvCore */ - struct pnv_tod_tbst pnv_tod_tbst; -#endif #endif =20 /* Other registers */ diff --git a/target/ppc/timebase_helper.c b/target/ppc/timebase_helper.c index 39d397416e..b02535bbd5 100644 --- a/target/ppc/timebase_helper.c +++ b/target/ppc/timebase_helper.c @@ -217,7 +217,13 @@ void helper_store_booke_tsr(CPUPPCState *env, target_u= long val) store_booke_tsr(env, val); } =20 -#if defined(TARGET_PPC64) +#if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY) +/* + * qemu-user breaks with pnv headers, so they go under ifdefs for now. + * A clean up may be to move powernv specific registers and helpers into + * target/ppc/pnv_helper.c + */ +#include "hw/ppc/pnv_core.h" /* * POWER processor Timebase Facility */ @@ -298,8 +304,17 @@ static void write_tfmr(CPUPPCState *env, target_ulong = val) } } =20 +static PnvCoreTODState *cpu_get_tbst(PowerPCCPU *cpu) +{ + PnvCore *pc =3D pnv_cpu_state(cpu)->pnv_core; + + return &pc->tod_state; +} + static void tb_state_machine_step(CPUPPCState *env) { + PowerPCCPU *cpu =3D env_archcpu(env); + PnvCoreTODState *tod_state =3D cpu_get_tbst(cpu); uint64_t tfmr =3D env->spr[SPR_TFMR]; unsigned int tbst =3D tfmr_get_tb_state(tfmr); =20 @@ -307,15 +322,15 @@ static void tb_state_machine_step(CPUPPCState *env) return; } =20 - if (env->pnv_tod_tbst.tb_sync_pulse_timer) { - env->pnv_tod_tbst.tb_sync_pulse_timer--; + if (tod_state->tb_sync_pulse_timer) { + tod_state->tb_sync_pulse_timer--; } else { tfmr |=3D TFMR_TB_SYNC_OCCURED; write_tfmr(env, tfmr); } =20 - if (env->pnv_tod_tbst.tb_state_timer) { - env->pnv_tod_tbst.tb_state_timer--; + if (tod_state->tb_state_timer) { + tod_state->tb_state_timer--; return; } =20 @@ -332,20 +347,20 @@ static void tb_state_machine_step(CPUPPCState *env) } else if (tfmr & TFMR_MOVE_CHIP_TOD_TO_TB) { if (tbst =3D=3D TBST_SYNC_WAIT) { tfmr =3D tfmr_new_tb_state(tfmr, TBST_GET_TOD); - env->pnv_tod_tbst.tb_state_timer =3D 3; + tod_state->tb_state_timer =3D 3; } else if (tbst =3D=3D TBST_GET_TOD) { - if (env->pnv_tod_tbst.tod_sent_to_tb) { + if (tod_state->tod_sent_to_tb) { tfmr =3D tfmr_new_tb_state(tfmr, TBST_TB_RUNNING); tfmr &=3D ~TFMR_MOVE_CHIP_TOD_TO_TB; - env->pnv_tod_tbst.tb_ready_for_tod =3D 0; - env->pnv_tod_tbst.tod_sent_to_tb =3D 0; + tod_state->tb_ready_for_tod =3D 0; + tod_state->tod_sent_to_tb =3D 0; } } else { qemu_log_mask(LOG_GUEST_ERROR, "TFMR error: MOVE_CHIP_TOD_TO_T= B " "state machine in invalid state 0x%x\n", tbst); tfmr =3D tfmr_new_tb_state(tfmr, TBST_TB_ERROR); tfmr |=3D TFMR_FIRMWARE_CONTROL_ERROR; - env->pnv_tod_tbst.tb_ready_for_tod =3D 0; + tod_state->tb_ready_for_tod =3D 0; } } =20 @@ -361,6 +376,8 @@ target_ulong helper_load_tfmr(CPUPPCState *env) =20 void helper_store_tfmr(CPUPPCState *env, target_ulong val) { + PowerPCCPU *cpu =3D env_archcpu(env); + PnvCoreTODState *tod_state =3D cpu_get_tbst(cpu); uint64_t tfmr =3D env->spr[SPR_TFMR]; uint64_t clear_on_write; unsigned int tbst =3D tfmr_get_tb_state(tfmr); @@ -384,14 +401,7 @@ void helper_store_tfmr(CPUPPCState *env, target_ulong = val) * after the second mfspr. */ tfmr &=3D ~TFMR_TB_SYNC_OCCURED; - env->pnv_tod_tbst.tb_sync_pulse_timer =3D 1; - - if (ppc_cpu_tir(env_archcpu(env)) !=3D 0 && - (val & (TFMR_LOAD_TOD_MOD | TFMR_MOVE_CHIP_TOD_TO_TB))) { - qemu_log_mask(LOG_UNIMP, "TFMR timebase state machine can only be " - "driven by thread 0\n"); - goto out; - } + tod_state->tb_sync_pulse_timer =3D 1; =20 if (((tfmr | val) & (TFMR_LOAD_TOD_MOD | TFMR_MOVE_CHIP_TOD_TO_TB)) = =3D=3D (TFMR_LOAD_TOD_MOD | TFMR_MOVE_CHIP_TOD_TO_TB)) { @@ -399,7 +409,7 @@ void helper_store_tfmr(CPUPPCState *env, target_ulong v= al) "MOVE_CHIP_TOD_TO_TB both set\n"); tfmr =3D tfmr_new_tb_state(tfmr, TBST_TB_ERROR); tfmr |=3D TFMR_FIRMWARE_CONTROL_ERROR; - env->pnv_tod_tbst.tb_ready_for_tod =3D 0; + tod_state->tb_ready_for_tod =3D 0; goto out; } =20 @@ -413,8 +423,8 @@ void helper_store_tfmr(CPUPPCState *env, target_ulong v= al) tfmr &=3D ~TFMR_LOAD_TOD_MOD; tfmr &=3D ~TFMR_MOVE_CHIP_TOD_TO_TB; tfmr &=3D ~TFMR_FIRMWARE_CONTROL_ERROR; /* XXX: should this be cle= ared? */ - env->pnv_tod_tbst.tb_ready_for_tod =3D 0; - env->pnv_tod_tbst.tod_sent_to_tb =3D 0; + tod_state->tb_ready_for_tod =3D 0; + tod_state->tod_sent_to_tb =3D 0; goto out; } =20 @@ -427,19 +437,19 @@ void helper_store_tfmr(CPUPPCState *env, target_ulong= val) =20 if (tfmr & TFMR_LOAD_TOD_MOD) { /* Wait for an arbitrary 3 mfspr until the next state transition. = */ - env->pnv_tod_tbst.tb_state_timer =3D 3; + tod_state->tb_state_timer =3D 3; } else if (tfmr & TFMR_MOVE_CHIP_TOD_TO_TB) { if (tbst =3D=3D TBST_NOT_SET) { tfmr =3D tfmr_new_tb_state(tfmr, TBST_SYNC_WAIT); - env->pnv_tod_tbst.tb_ready_for_tod =3D 1; - env->pnv_tod_tbst.tb_state_timer =3D 3; /* arbitrary */ + tod_state->tb_ready_for_tod =3D 1; + tod_state->tb_state_timer =3D 3; /* arbitrary */ } else { qemu_log_mask(LOG_GUEST_ERROR, "TFMR error: MOVE_CHIP_TOD_TO_T= B " "not in TB not set state 0x%x\n= ", tbst); tfmr =3D tfmr_new_tb_state(tfmr, TBST_TB_ERROR); tfmr |=3D TFMR_FIRMWARE_CONTROL_ERROR; - env->pnv_tod_tbst.tb_ready_for_tod =3D 0; + tod_state->tb_ready_for_tod =3D 0; } } =20 --=20 2.45.2