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target/riscv: Apply modularized matching conditions for watchpoint

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We have implemented trigger_common_match(), which checks if the enabled
privilege levels of the trigger match CPU's current privilege level.
Remove the related code in riscv_cpu_debug_check_watchpoint() and invoke
trigger_common_match() to check the privilege levels of the type 2 and
type 6 triggers for the watchpoints.

This commit also changes the behavior of looping the triggers. In
previous implementation, if we have a type 2 trigger and
env->virt_enabled is true, we directly return false to stop the loop.
Now we keep looping all the triggers until we find a matched trigger.

Only load/store bits and loaded/stored address should be further checked
in riscv_cpu_debug_check_watchpoint().

Signed-off-by: Alvin Chang <alvinga@andestech.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20240626132247.2761286-3-alvinga@andestech.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Alvin Chang 2024-06-26 21:22:46 +08:00 committed by Alistair Francis
parent 5e20b88953
commit 72dec1666f
1 changed files with 6 additions and 20 deletions
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26
target/riscv/debug.c
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@ -901,13 +901,12 @@ bool riscv_cpu_debug_check_watchpoint(CPUState *cs, CPUWatchpoint *wp)
for (i = 0; i < RV_MAX_TRIGGERS; i++) {
trigger_type = get_trigger_type(env, i);
if (!trigger_common_match(env, trigger_type, i)) {
continue;
}
switch (trigger_type) {
case TRIGGER_TYPE_AD_MATCH:
/* type 2 trigger cannot be fired in VU/VS mode */
if (env->virt_enabled) {
return false;
}
ctrl = env->tdata1[i];
addr = env->tdata2[i];
flags = 0;
@ -920,10 +919,7 @@ bool riscv_cpu_debug_check_watchpoint(CPUState *cs, CPUWatchpoint *wp)
}
if ((wp->flags & flags) && (wp->vaddr == addr)) {
/* check U/S/M bit against current privilege level */
if ((ctrl >> 3) & BIT(env->priv)) {
return true;
}
return true;
}
break;
case TRIGGER_TYPE_AD_MATCH6:
@ -939,17 +935,7 @@ bool riscv_cpu_debug_check_watchpoint(CPUState *cs, CPUWatchpoint *wp)
}
if ((wp->flags & flags) && (wp->vaddr == addr)) {
if (env->virt_enabled) {
/* check VU/VS bit against current privilege level */
if ((ctrl >> 23) & BIT(env->priv)) {
return true;
}
} else {
/* check U/S/M bit against current privilege level */
if ((ctrl >> 3) & BIT(env->priv)) {
return true;
}
}
return true;
}
break;
default: