[PATCH] lib: utils: Fix irqchip registration for PLIC and APLIC

[Himanshu Chauhan]

> On 24 Dec 2024, at 13:58, Anup Patel <apatel at ventanamicro.com> wrote:
> 
> Currently, the same irqchip instance is registered for multiple PLIC
> and APLIC instances which causes the sbi_list_for_each_entry() loop
> in the sbi_irqchip_init() to hang at boot-time.
> 
> To address the above issue, register a separate irqchip instance for
> each PLIC and APLIC instance.
> 
> Fixes: 2dd6eaf68055 ("lib: sbi_irqchip: Call driver warm_init from SBI core")
> Reported-by: Himanshu Chauhan <hchauhan at ventanamicro.com>
> Signed-off-by: Anup Patel <apatel at ventanamicro.com>
> ---
> include/sbi_utils/irqchip/aplic.h | 4 ++++
> include/sbi_utils/irqchip/plic.h  | 4 ++++
> lib/utils/irqchip/aplic.c         | 6 +-----
> lib/utils/irqchip/plic.c          | 8 ++------
> 4 files changed, 11 insertions(+), 11 deletions(-)
> 
> diff --git a/include/sbi_utils/irqchip/aplic.h b/include/sbi_utils/irqchip/aplic.h
> index 82682e8a..e31f48a4 100644
> --- a/include/sbi_utils/irqchip/aplic.h
> +++ b/include/sbi_utils/irqchip/aplic.h
> @@ -12,6 +12,7 @@
> #define __IRQCHIP_APLIC_H__
> 
> #include <sbi/sbi_types.h>
> +#include <sbi/sbi_irqchip.h>
> 
> #define APLIC_MAX_DELEGATE 16
> 
> @@ -30,6 +31,9 @@ struct aplic_delegate_data {
> };
> 
> struct aplic_data {
> + /* Private members */
> + struct sbi_irqchip_device irqchip;
> + /* Public members */
> unsigned long addr;
> unsigned long size;
> unsigned long num_idc;
> diff --git a/include/sbi_utils/irqchip/plic.h b/include/sbi_utils/irqchip/plic.h
> index a173871e..18aa7469 100644
> --- a/include/sbi_utils/irqchip/plic.h
> +++ b/include/sbi_utils/irqchip/plic.h
> @@ -11,8 +11,12 @@
> #define __IRQCHIP_PLIC_H__
> 
> #include <sbi/sbi_types.h>
> +#include <sbi/sbi_irqchip.h>
> 
> struct plic_data {
> + /* Private members */
> + struct sbi_irqchip_device irqchip;
> + /* Public members */
> unsigned long addr;
> unsigned long size;
> unsigned long num_src;
> diff --git a/lib/utils/irqchip/aplic.c b/lib/utils/irqchip/aplic.c
> index 27371849..72906d5d 100644
> --- a/lib/utils/irqchip/aplic.c
> +++ b/lib/utils/irqchip/aplic.c
> @@ -12,7 +12,6 @@
> #include <sbi/sbi_console.h>
> #include <sbi/sbi_domain.h>
> #include <sbi/sbi_error.h>
> -#include <sbi/sbi_irqchip.h>
> #include <sbi_utils/irqchip/aplic.h>
> 
> #define APLIC_MAX_IDC (1UL << 14)
> @@ -166,9 +165,6 @@ static int aplic_check_msicfg(struct aplic_msicfg_data *msicfg)
> return 0;
> }
> 
> -static struct sbi_irqchip_device aplic_device = {
> -};
> -
> int aplic_cold_irqchip_init(struct aplic_data *aplic)
> {
> int rc;
> @@ -280,7 +276,7 @@ int aplic_cold_irqchip_init(struct aplic_data *aplic)
> }
> 
> /* Register irqchip device */
> - sbi_irqchip_add_device(&aplic_device);
> + sbi_irqchip_add_device(&aplic->irqchip);
> 
> return 0;
> }
> diff --git a/lib/utils/irqchip/plic.c b/lib/utils/irqchip/plic.c
> index 7761ae98..8b2190f8 100644
> --- a/lib/utils/irqchip/plic.c
> +++ b/lib/utils/irqchip/plic.c
> @@ -15,7 +15,6 @@
> #include <sbi/sbi_domain.h>
> #include <sbi/sbi_error.h>
> #include <sbi/sbi_heap.h>
> -#include <sbi/sbi_irqchip.h>
> #include <sbi/sbi_string.h>
> #include <sbi_utils/irqchip/plic.h>
> 
> @@ -221,10 +220,6 @@ static int plic_warm_irqchip_init(struct sbi_irqchip_device *dev)
> return 0;
> }
> 
> -static struct sbi_irqchip_device plic_device = {
> - .warm_init = plic_warm_irqchip_init,
> -};
> -
> int plic_cold_irqchip_init(struct plic_data *plic)
> {
> int i, ret;
> @@ -284,7 +279,8 @@ int plic_cold_irqchip_init(struct plic_data *plic)
> }
> 
> /* Register irqchip device */
> - sbi_irqchip_add_device(&plic_device);
> + plic->irqchip.warm_init = plic_warm_irqchip_init;
> + sbi_irqchip_add_device(&plic->irqchip);
> 
> return 0;
> }
> -- 
> 2.43.0

Looks good. Thanks.

Reviewed-by: Himanshu Chauhan <hchauhan at ventanamicro.com <mailto:hchauhan at ventanamicro.com>>


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