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Re: [PATCH v1 04/14] xen/riscv: introduce init_IRQ()
- To: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 10 Apr 2025 17:25:22 +0200
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- Cc: Alistair Francis <alistair.francis@xxxxxxx>, Bob Eshleman <bobbyeshleman@xxxxxxxxx>, Connor Davis <connojdavis@xxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 10 Apr 2025 15:25:40 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 08.04.2025 17:57, Oleksii Kurochko wrote:
> --- a/xen/arch/riscv/include/asm/irq.h
> +++ b/xen/arch/riscv/include/asm/irq.h
> @@ -3,6 +3,28 @@
> #define ASM__RISCV__IRQ_H
>
> #include <xen/bug.h>
> +#include <xen/device_tree.h>
> +
> +#define NR_IRQS 1024
> +
> +/*
> + * TODO: Should IRQ_TYPE_* be moved to xen/irq.h and wrapped into
> + * #ifdef CONFIG_HAS_DEVICE_TREE?
> + */
Wouldn't that be more like asm-generic/dt-irq.h (or irq-dt.h)? The field where
these values are stored is an arch-specific one, after all.
> --- /dev/null
> +++ b/xen/arch/riscv/irq.c
> @@ -0,0 +1,44 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +
> +/*
> + * RISC-V Trap handlers
> + *
> + * Copyright (c) 2024 Vates
> + */
> +
> +#include <xen/bug.h>
> +#include <xen/init.h>
> +#include <xen/irq.h>
> +
> +static irq_desc_t irq_desc[NR_IRQS];
> +
> +int arch_init_one_irq_desc(struct irq_desc *desc)
> +{
> + desc->arch.type = IRQ_TYPE_INVALID;
> + return 0;
> +}
> +
> +static int __init init_irq_data(void)
> +{
> + int irq;
> +
> + for ( irq = 0; irq < NR_IRQS; irq++ )
For this the variable would better be of unsigned type. I realize though that
...
> + {
> + struct irq_desc *desc = irq_to_desc(irq);
> + int rc = init_one_irq_desc(desc);
> +
> + if ( rc )
> + return rc;
> +
> + desc->irq = irq;
... it's a plain int field that we're storing into here. I don't think I can
spot
any place where a negative value would be stored into there.
Jan
|
