[PATCH v2 03/19] ppc/pnv: Move timebase state into PnvCore

Nicholas Piggin posted 19 patches 4 months, 2 weeks ago
Maintainers: "Cédric Le Goater" <clg@kaod.org>, Nicholas Piggin <npiggin@gmail.com>, "Frédéric Barrat" <fbarrat@linux.ibm.com>, Daniel Henrique Barboza <danielhb413@gmail.com>, David Gibson <david@gibson.dropbear.id.au>, Harsh Prateek Bora <harshpb@linux.ibm.com>, Eduardo Habkost <eduardo@habkost.net>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Yanan Wang <wangyanan55@huawei.com>, Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <richard.henderson@linaro.org>
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[PATCH v2 03/19] ppc/pnv: Move timebase state into PnvCore
Posted by Nicholas Piggin 4 months, 2 weeks ago
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 <harshpb@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 include/hw/ppc/pnv_core.h    | 17 ++++++++++++
 target/ppc/cpu.h             | 21 --------------
 hw/ppc/pnv_chiptod.c         |  7 ++---
 target/ppc/timebase_helper.c | 53 ++++++++++++++++++++----------------
 4 files changed, 49 insertions(+), 49 deletions(-)

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"
 
+/* 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;
 
     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)
 
-/*****************************************************************************/
-/* 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 */
 
@@ -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
 
     /* Other registers */
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, hwaddr 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 = chiptod->slave_pc_target->threads[0];
-            CPUPPCState *env = &cpu->env;
+            PnvCore *pc = chiptod->slave_pc_target;
 
             /*
              * 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, hwaddr addr,
              * thread 0.
              */
 
-            if (env->pnv_tod_tbst.tb_ready_for_tod) {
-                env->pnv_tod_tbst.tod_sent_to_tb = 1;
+            if (pc->tod_state.tb_ready_for_tod) {
+                pc->tod_state.tod_sent_to_tb = 1;
             } else {
                 qemu_log_mask(LOG_GUEST_ERROR, "pnv_chiptod: xscom write reg"
                               " TOD_MOVE_TOD_TO_TB_REG with TB not ready to"
diff --git a/target/ppc/timebase_helper.c b/target/ppc/timebase_helper.c
index 39d397416e..52f9e6669c 100644
--- a/target/ppc/timebase_helper.c
+++ b/target/ppc/timebase_helper.c
@@ -19,6 +19,7 @@
 #include "qemu/osdep.h"
 #include "cpu.h"
 #include "hw/ppc/ppc.h"
+#include "hw/ppc/pnv_core.h"
 #include "exec/helper-proto.h"
 #include "exec/exec-all.h"
 #include "qemu/log.h"
@@ -298,8 +299,17 @@ static void write_tfmr(CPUPPCState *env, target_ulong val)
     }
 }
 
+static PnvCoreTODState *cpu_get_tbst(PowerPCCPU *cpu)
+{
+    PnvCore *pc = pnv_cpu_state(cpu)->pnv_core;
+
+    return &pc->tod_state;
+}
+
 static void tb_state_machine_step(CPUPPCState *env)
 {
+    PowerPCCPU *cpu = env_archcpu(env);
+    PnvCoreTODState *tod_state = cpu_get_tbst(cpu);
     uint64_t tfmr = env->spr[SPR_TFMR];
     unsigned int tbst = tfmr_get_tb_state(tfmr);
 
@@ -307,15 +317,15 @@ static void tb_state_machine_step(CPUPPCState *env)
         return;
     }
 
-    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 |= TFMR_TB_SYNC_OCCURED;
         write_tfmr(env, tfmr);
     }
 
-    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;
     }
 
@@ -332,20 +342,20 @@ static void tb_state_machine_step(CPUPPCState *env)
     } else if (tfmr & TFMR_MOVE_CHIP_TOD_TO_TB) {
         if (tbst == TBST_SYNC_WAIT) {
             tfmr = tfmr_new_tb_state(tfmr, TBST_GET_TOD);
-            env->pnv_tod_tbst.tb_state_timer = 3;
+            tod_state->tb_state_timer = 3;
         } else if (tbst == TBST_GET_TOD) {
-            if (env->pnv_tod_tbst.tod_sent_to_tb) {
+            if (tod_state->tod_sent_to_tb) {
                 tfmr = tfmr_new_tb_state(tfmr, TBST_TB_RUNNING);
                 tfmr &= ~TFMR_MOVE_CHIP_TOD_TO_TB;
-                env->pnv_tod_tbst.tb_ready_for_tod = 0;
-                env->pnv_tod_tbst.tod_sent_to_tb = 0;
+                tod_state->tb_ready_for_tod = 0;
+                tod_state->tod_sent_to_tb = 0;
             }
         } else {
             qemu_log_mask(LOG_GUEST_ERROR, "TFMR error: MOVE_CHIP_TOD_TO_TB "
                           "state machine in invalid state 0x%x\n", tbst);
             tfmr = tfmr_new_tb_state(tfmr, TBST_TB_ERROR);
             tfmr |= TFMR_FIRMWARE_CONTROL_ERROR;
-            env->pnv_tod_tbst.tb_ready_for_tod = 0;
+            tod_state->tb_ready_for_tod = 0;
         }
     }
 
@@ -361,6 +371,8 @@ target_ulong helper_load_tfmr(CPUPPCState *env)
 
 void helper_store_tfmr(CPUPPCState *env, target_ulong val)
 {
+    PowerPCCPU *cpu = env_archcpu(env);
+    PnvCoreTODState *tod_state = cpu_get_tbst(cpu);
     uint64_t tfmr = env->spr[SPR_TFMR];
     uint64_t clear_on_write;
     unsigned int tbst = tfmr_get_tb_state(tfmr);
@@ -384,14 +396,7 @@ void helper_store_tfmr(CPUPPCState *env, target_ulong val)
      * after the second mfspr.
      */
     tfmr &= ~TFMR_TB_SYNC_OCCURED;
-    env->pnv_tod_tbst.tb_sync_pulse_timer = 1;
-
-    if (ppc_cpu_tir(env_archcpu(env)) != 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 = 1;
 
     if (((tfmr | val) & (TFMR_LOAD_TOD_MOD | TFMR_MOVE_CHIP_TOD_TO_TB)) ==
                         (TFMR_LOAD_TOD_MOD | TFMR_MOVE_CHIP_TOD_TO_TB)) {
@@ -399,7 +404,7 @@ void helper_store_tfmr(CPUPPCState *env, target_ulong val)
                                        "MOVE_CHIP_TOD_TO_TB both set\n");
         tfmr = tfmr_new_tb_state(tfmr, TBST_TB_ERROR);
         tfmr |= TFMR_FIRMWARE_CONTROL_ERROR;
-        env->pnv_tod_tbst.tb_ready_for_tod = 0;
+        tod_state->tb_ready_for_tod = 0;
         goto out;
     }
 
@@ -413,8 +418,8 @@ void helper_store_tfmr(CPUPPCState *env, target_ulong val)
         tfmr &= ~TFMR_LOAD_TOD_MOD;
         tfmr &= ~TFMR_MOVE_CHIP_TOD_TO_TB;
         tfmr &= ~TFMR_FIRMWARE_CONTROL_ERROR; /* XXX: should this be cleared? */
-        env->pnv_tod_tbst.tb_ready_for_tod = 0;
-        env->pnv_tod_tbst.tod_sent_to_tb = 0;
+        tod_state->tb_ready_for_tod = 0;
+        tod_state->tod_sent_to_tb = 0;
         goto out;
     }
 
@@ -427,19 +432,19 @@ void helper_store_tfmr(CPUPPCState *env, target_ulong val)
 
     if (tfmr & TFMR_LOAD_TOD_MOD) {
         /* Wait for an arbitrary 3 mfspr until the next state transition. */
-        env->pnv_tod_tbst.tb_state_timer = 3;
+        tod_state->tb_state_timer = 3;
     } else if (tfmr & TFMR_MOVE_CHIP_TOD_TO_TB) {
         if (tbst == TBST_NOT_SET) {
             tfmr = tfmr_new_tb_state(tfmr, TBST_SYNC_WAIT);
-            env->pnv_tod_tbst.tb_ready_for_tod = 1;
-            env->pnv_tod_tbst.tb_state_timer = 3; /* arbitrary */
+            tod_state->tb_ready_for_tod = 1;
+            tod_state->tb_state_timer = 3; /* arbitrary */
         } else {
             qemu_log_mask(LOG_GUEST_ERROR, "TFMR error: MOVE_CHIP_TOD_TO_TB "
                                            "not in TB not set state 0x%x\n",
                                            tbst);
             tfmr = tfmr_new_tb_state(tfmr, TBST_TB_ERROR);
             tfmr |= TFMR_FIRMWARE_CONTROL_ERROR;
-            env->pnv_tod_tbst.tb_ready_for_tod = 0;
+            tod_state->tb_ready_for_tod = 0;
         }
     }
 
-- 
2.45.1
Re: [PATCH v2 03/19] ppc/pnv: Move timebase state into PnvCore
Posted by Cédric Le Goater 4 months, 2 weeks ago
On 7/12/24 14:02, Nicholas Piggin wrote:
> 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 <harshpb@linux.ibm.com>
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> ---
>   include/hw/ppc/pnv_core.h    | 17 ++++++++++++
>   target/ppc/cpu.h             | 21 --------------
>   hw/ppc/pnv_chiptod.c         |  7 ++---
>   target/ppc/timebase_helper.c | 53 ++++++++++++++++++++----------------
>   4 files changed, 49 insertions(+), 49 deletions(-)
> 
> 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"
>   
> +/* 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;
>   
>       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)
>   
> -/*****************************************************************************/
> -/* 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 */
>   
> @@ -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
>   
>       /* Other registers */
> 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, hwaddr 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 = chiptod->slave_pc_target->threads[0];
> -            CPUPPCState *env = &cpu->env;
> +            PnvCore *pc = chiptod->slave_pc_target;
>   
>               /*
>                * 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, hwaddr addr,
>                * thread 0.
>                */
>   
> -            if (env->pnv_tod_tbst.tb_ready_for_tod) {
> -                env->pnv_tod_tbst.tod_sent_to_tb = 1;
> +            if (pc->tod_state.tb_ready_for_tod) {
> +                pc->tod_state.tod_sent_to_tb = 1;
>               } else {
>                   qemu_log_mask(LOG_GUEST_ERROR, "pnv_chiptod: xscom write reg"
>                                 " TOD_MOVE_TOD_TO_TB_REG with TB not ready to"
> diff --git a/target/ppc/timebase_helper.c b/target/ppc/timebase_helper.c
> index 39d397416e..52f9e6669c 100644
> --- a/target/ppc/timebase_helper.c
> +++ b/target/ppc/timebase_helper.c
> @@ -19,6 +19,7 @@
>   #include "qemu/osdep.h"
>   #include "cpu.h"
>   #include "hw/ppc/ppc.h"
> +#include "hw/ppc/pnv_core.h"

I am afraid this header file is pulling too much definitions for
qemu-user. It breaks compile.

Thanks,

C.

>   #include "exec/helper-proto.h"
>   #include "exec/exec-all.h"
>   #include "qemu/log.h"
> @@ -298,8 +299,17 @@ static void write_tfmr(CPUPPCState *env, target_ulong val)
>       }
>   }
>   
> +static PnvCoreTODState *cpu_get_tbst(PowerPCCPU *cpu)
> +{
> +    PnvCore *pc = pnv_cpu_state(cpu)->pnv_core;
> +
> +    return &pc->tod_state;
> +}
> +
>   static void tb_state_machine_step(CPUPPCState *env)
>   {
> +    PowerPCCPU *cpu = env_archcpu(env);
> +    PnvCoreTODState *tod_state = cpu_get_tbst(cpu);
>       uint64_t tfmr = env->spr[SPR_TFMR];
>       unsigned int tbst = tfmr_get_tb_state(tfmr);
>   
> @@ -307,15 +317,15 @@ static void tb_state_machine_step(CPUPPCState *env)
>           return;
>       }
>   
> -    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 |= TFMR_TB_SYNC_OCCURED;
>           write_tfmr(env, tfmr);
>       }
>   
> -    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;
>       }
>   
> @@ -332,20 +342,20 @@ static void tb_state_machine_step(CPUPPCState *env)
>       } else if (tfmr & TFMR_MOVE_CHIP_TOD_TO_TB) {
>           if (tbst == TBST_SYNC_WAIT) {
>               tfmr = tfmr_new_tb_state(tfmr, TBST_GET_TOD);
> -            env->pnv_tod_tbst.tb_state_timer = 3;
> +            tod_state->tb_state_timer = 3;
>           } else if (tbst == TBST_GET_TOD) {
> -            if (env->pnv_tod_tbst.tod_sent_to_tb) {
> +            if (tod_state->tod_sent_to_tb) {
>                   tfmr = tfmr_new_tb_state(tfmr, TBST_TB_RUNNING);
>                   tfmr &= ~TFMR_MOVE_CHIP_TOD_TO_TB;
> -                env->pnv_tod_tbst.tb_ready_for_tod = 0;
> -                env->pnv_tod_tbst.tod_sent_to_tb = 0;
> +                tod_state->tb_ready_for_tod = 0;
> +                tod_state->tod_sent_to_tb = 0;
>               }
>           } else {
>               qemu_log_mask(LOG_GUEST_ERROR, "TFMR error: MOVE_CHIP_TOD_TO_TB "
>                             "state machine in invalid state 0x%x\n", tbst);
>               tfmr = tfmr_new_tb_state(tfmr, TBST_TB_ERROR);
>               tfmr |= TFMR_FIRMWARE_CONTROL_ERROR;
> -            env->pnv_tod_tbst.tb_ready_for_tod = 0;
> +            tod_state->tb_ready_for_tod = 0;
>           }
>       }
>   
> @@ -361,6 +371,8 @@ target_ulong helper_load_tfmr(CPUPPCState *env)
>   
>   void helper_store_tfmr(CPUPPCState *env, target_ulong val)
>   {
> +    PowerPCCPU *cpu = env_archcpu(env);
> +    PnvCoreTODState *tod_state = cpu_get_tbst(cpu);
>       uint64_t tfmr = env->spr[SPR_TFMR];
>       uint64_t clear_on_write;
>       unsigned int tbst = tfmr_get_tb_state(tfmr);
> @@ -384,14 +396,7 @@ void helper_store_tfmr(CPUPPCState *env, target_ulong val)
>        * after the second mfspr.
>        */
>       tfmr &= ~TFMR_TB_SYNC_OCCURED;
> -    env->pnv_tod_tbst.tb_sync_pulse_timer = 1;
> -
> -    if (ppc_cpu_tir(env_archcpu(env)) != 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 = 1;
>   
>       if (((tfmr | val) & (TFMR_LOAD_TOD_MOD | TFMR_MOVE_CHIP_TOD_TO_TB)) ==
>                           (TFMR_LOAD_TOD_MOD | TFMR_MOVE_CHIP_TOD_TO_TB)) {
> @@ -399,7 +404,7 @@ void helper_store_tfmr(CPUPPCState *env, target_ulong val)
>                                          "MOVE_CHIP_TOD_TO_TB both set\n");
>           tfmr = tfmr_new_tb_state(tfmr, TBST_TB_ERROR);
>           tfmr |= TFMR_FIRMWARE_CONTROL_ERROR;
> -        env->pnv_tod_tbst.tb_ready_for_tod = 0;
> +        tod_state->tb_ready_for_tod = 0;
>           goto out;
>       }
>   
> @@ -413,8 +418,8 @@ void helper_store_tfmr(CPUPPCState *env, target_ulong val)
>           tfmr &= ~TFMR_LOAD_TOD_MOD;
>           tfmr &= ~TFMR_MOVE_CHIP_TOD_TO_TB;
>           tfmr &= ~TFMR_FIRMWARE_CONTROL_ERROR; /* XXX: should this be cleared? */
> -        env->pnv_tod_tbst.tb_ready_for_tod = 0;
> -        env->pnv_tod_tbst.tod_sent_to_tb = 0;
> +        tod_state->tb_ready_for_tod = 0;
> +        tod_state->tod_sent_to_tb = 0;
>           goto out;
>       }
>   
> @@ -427,19 +432,19 @@ void helper_store_tfmr(CPUPPCState *env, target_ulong val)
>   
>       if (tfmr & TFMR_LOAD_TOD_MOD) {
>           /* Wait for an arbitrary 3 mfspr until the next state transition. */
> -        env->pnv_tod_tbst.tb_state_timer = 3;
> +        tod_state->tb_state_timer = 3;
>       } else if (tfmr & TFMR_MOVE_CHIP_TOD_TO_TB) {
>           if (tbst == TBST_NOT_SET) {
>               tfmr = tfmr_new_tb_state(tfmr, TBST_SYNC_WAIT);
> -            env->pnv_tod_tbst.tb_ready_for_tod = 1;
> -            env->pnv_tod_tbst.tb_state_timer = 3; /* arbitrary */
> +            tod_state->tb_ready_for_tod = 1;
> +            tod_state->tb_state_timer = 3; /* arbitrary */
>           } else {
>               qemu_log_mask(LOG_GUEST_ERROR, "TFMR error: MOVE_CHIP_TOD_TO_TB "
>                                              "not in TB not set state 0x%x\n",
>                                              tbst);
>               tfmr = tfmr_new_tb_state(tfmr, TBST_TB_ERROR);
>               tfmr |= TFMR_FIRMWARE_CONTROL_ERROR;
> -            env->pnv_tod_tbst.tb_ready_for_tod = 0;
> +            tod_state->tb_ready_for_tod = 0;
>           }
>       }
>
Re: [PATCH v2 03/19] ppc/pnv: Move timebase state into PnvCore
Posted by Nicholas Piggin 4 months, 1 week ago
On Fri Jul 12, 2024 at 11:40 PM AEST, Cédric Le Goater wrote:
> On 7/12/24 14:02, Nicholas Piggin wrote:
> > diff --git a/target/ppc/timebase_helper.c b/target/ppc/timebase_helper.c
> > index 39d397416e..52f9e6669c 100644
> > --- a/target/ppc/timebase_helper.c
> > +++ b/target/ppc/timebase_helper.c
> > @@ -19,6 +19,7 @@
> >   #include "qemu/osdep.h"
> >   #include "cpu.h"
> >   #include "hw/ppc/ppc.h"
> > +#include "hw/ppc/pnv_core.h"
>
> I am afraid this header file is pulling too much definitions for
> qemu-user. It breaks compile.

Humph, sorry I obviously wasn't testing it. I might just ifdef it for
now.

Not sure the best way to do it cleanly in the longer term , Power
specific things could go into their own helper.c file, but I don't
necessarily like to move them away from similar/related functions.

Thanks,
Nick