linux-kernel - [RFC PATCH V2 36/38] irqchip: riscv: s64ilp32: Use __riscv_xlen instead of CONFIG

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Message-Id: <20231112061514.2306187-37-guoren@kernel.org>
Date:   Sun, 12 Nov 2023 01:15:12 -0500
From:   guoren@...nel.org
To:     arnd@...db.de, guoren@...nel.org, palmer@...osinc.com,
        tglx@...utronix.de, conor.dooley@...rochip.com, heiko@...ech.de,
        apatel@...tanamicro.com, atishp@...shpatra.org, bjorn@...nel.org,
        paul.walmsley@...ive.com, anup@...infault.org, jiawei@...as.ac.cn,
        liweiwei@...as.ac.cn, wefu@...hat.com, U2FsdGVkX1@...il.com,
        wangjunqiang@...as.ac.cn, kito.cheng@...ive.com,
        andy.chiu@...ive.com, vincent.chen@...ive.com,
        greentime.hu@...ive.com, wuwei2016@...as.ac.cn, jrtc27@...c27.com,
        luto@...nel.org, fweimer@...hat.com, catalin.marinas@....com,
        hjl.tools@...il.com
Cc:     linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org, Guo Ren <guoren@...ux.alibaba.com>
Subject: [RFC PATCH V2 36/38] irqchip: riscv: s64ilp32: Use __riscv_xlen instead of CONFIG_32BIT

From: Guo Ren <guoren@...ux.alibaba.com>

When s64ilp32 enabled, CONFIG_32BIT=y but __riscv_xlen=64. So we
must use __riscv_xlen to detect real machine XLEN for CSR access.

Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
Signed-off-by: Guo Ren <guoren@...nel.org>
---
 drivers/irqchip/irq-riscv-intc.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
index 4adeee1bc391..ee3514ef4326 100644
--- a/drivers/irqchip/irq-riscv-intc.c
+++ b/drivers/irqchip/irq-riscv-intc.c
@@ -22,10 +22,7 @@ static struct irq_domain *intc_domain;
 
 static asmlinkage void riscv_intc_irq(struct pt_regs *regs)
 {
-	unsigned long cause = regs->cause & ~CAUSE_IRQ_FLAG;
-
-	if (unlikely(cause >= BITS_PER_LONG))
-		panic("unexpected interrupt cause");
+	xlen_t cause = regs->cause & ~CAUSE_IRQ_FLAG;
 
 	generic_handle_domain_irq(intc_domain, cause);
 }
@@ -117,7 +114,7 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
 {
 	int rc;
 
-	intc_domain = irq_domain_create_linear(fn, BITS_PER_LONG,
+	intc_domain = irq_domain_create_linear(fn, __riscv_xlen,
 					       &riscv_intc_domain_ops, NULL);
 	if (!intc_domain) {
 		pr_err("unable to add IRQ domain\n");
@@ -132,7 +129,7 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
 
 	riscv_set_intc_hwnode_fn(riscv_intc_hwnode);
 
-	pr_info("%d local interrupts mapped\n", BITS_PER_LONG);
+	pr_info("%d local interrupts mapped\n", __riscv_xlen);
 
 	return 0;
 }
-- 
2.36.1