Commit 7c079007 authored by Juxin Gao's avatar Juxin Gao Committed by Hongchen Zhang
Browse files

drivers/irqchip: Disable pci_irq_limit when using AVEC interrupt controller 

LoongArch inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IB8166


CVE: NA

--------------------------------

In the new interrupt model, the AVEC interrupt controller no longer
has a limit on the number of interrupts like the extended interrupt
controller, so when using the avec interrupt model, pci_irq_limit
is disabled by default.

Signed-off-by: default avatarJuxin Gao <gaojuxin@loongson.cn>
parent bc72ea05

arch/loongarch/include/asm/setup.h

+1 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 


#define VECSIZE 0x200



extern bool disable_pci_irq_limit;

extern unsigned long eentry;

extern unsigned long tlbrentry;

extern char init_command_line[COMMAND_LINE_SIZE];

drivers/irqchip/irq-loongarch-avec.c

+2 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ struct pending_list { 
	struct list_head	head;

};



bool disable_pci_irq_limit;

static struct cpumask intersect_mask;

static DEFINE_PER_CPU(struct pending_list, pending_list);

#endif
@@ -372,6 +373,7 @@ static int __init avecintc_init(struct irq_domain *parent) 
	int ret, parent_irq;

	unsigned long value;



	disable_pci_irq_limit = true;

	raw_spin_lock_init(&loongarch_avec.lock);



	loongarch_avec.fwnode = irq_domain_alloc_named_fwnode("AVECINTC");

drivers/pci/msi/msi.c

+12 −6
Original line number Diff line number Diff line
@@ -421,6 +421,8 @@ static int msi_capability_init(struct pci_dev *dev, int nvec, 
}



#ifdef CONFIG_LOONGARCH

#include <asm/setup.h>



static unsigned int pci_irq_numbers = 32;



static int __init pci_irq_limit(char *str)
@@ -442,10 +444,12 @@ int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec, 
	int rc;



#ifdef CONFIG_LOONGARCH

	if (!disable_pci_irq_limit) {

		if (maxvec > 32) {

			maxvec = pci_irq_numbers;

			minvec = min_t(int, pci_irq_numbers, minvec);

		}

	}

#endif



	if (!pci_msi_supported(dev, minvec) || dev->current_state != PCI_D0)
@@ -838,10 +842,12 @@ int __pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, int 
	int hwsize, rc, nvec = maxvec;



#ifdef CONFIG_LOONGARCH

	if (!disable_pci_irq_limit) {

		if (maxvec > 32) {

			nvec = pci_irq_numbers;

			minvec = min_t(int, pci_irq_numbers, minvec);

		}

	}

#endif



	if (maxvec < minvec)