From 55144a1fd0d1f37b49ea051291decbbe427b7714 Mon Sep 17 00:00:00 2001
From: Jim Shu <jim.shu@sifive.com>
Date: Mon, 3 Oct 2022 04:14:39 +0000
Subject: [PATCH] hw/intc: sifive_plic: fix hard-coded max priority level
The maximum priority level is hard-coded when writing to interrupt
priority register. However, when writing to priority threshold register,
the maximum priority level is from num_priorities Property which is
configured by platform.
Also change interrupt priority register to use num_priorities Property
in maximum priority level.
Signed-off-by: Emmanuel Blot <emmanuel.blot@sifive.com>
Signed-off-by: Jim Shu <jim.shu@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20221003041440.2320-2-jim.shu@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
hw/intc/sifive_plic.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/hw/intc/sifive_plic.c b/hw/intc/sifive_plic.c
index af4ae3630e..f864efa761 100644
--- a/hw/intc/sifive_plic.c
+++ b/hw/intc/sifive_plic.c
@@ -180,8 +180,10 @@ static void sifive_plic_write(void *opaque, hwaddr addr, uint64_t value,
if (addr_between(addr, plic->priority_base, plic->num_sources << 2)) {
uint32_t irq = ((addr - plic->priority_base) >> 2) + 1;
- plic->source_priority[irq] = value & 7;
- sifive_plic_update(plic);
+ if (value <= plic->num_priorities) {
+ plic->source_priority[irq] = value;
+ sifive_plic_update(plic);
+ }
} else if (addr_between(addr, plic->pending_base,
plic->num_sources >> 3)) {
qemu_log_mask(LOG_GUEST_ERROR,