arch/arm64/include/asm/hardirq.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2012 ARM Ltd.
   4  */
   5 #ifndef __ASM_HARDIRQ_H
   6 #define __ASM_HARDIRQ_H
   7
   8 #include <linux/cache.h>
   9 #include <linux/percpu.h>
  10 #include <linux/threads.h>
  11 #include <asm/barrier.h>
  12 #include <asm/irq.h>
  13 #include <asm/kvm_arm.h>
  14 #include <asm/sysreg.h>
  15
  16 #define NR_IPI  7
  17
  18 typedef struct {
  19         unsigned int __softirq_pending;
  20         unsigned int ipi_irqs[NR_IPI];
  21 } ____cacheline_aligned irq_cpustat_t;
  22
  23 #include <linux/irq_cpustat.h>  /* Standard mappings for irq_cpustat_t above */
  24
  25 #define __inc_irq_stat(cpu, member)     __IRQ_STAT(cpu, member)++
  26 #define __get_irq_stat(cpu, member)     __IRQ_STAT(cpu, member)
  27
  28 u64 smp_irq_stat_cpu(unsigned int cpu);
  29 #define arch_irq_stat_cpu       smp_irq_stat_cpu
  30
  31 #define __ARCH_IRQ_EXIT_IRQS_DISABLED   1
  32
  33 struct nmi_ctx {
  34         u64 hcr;
  35 };
  36
  37 DECLARE_PER_CPU(struct nmi_ctx, nmi_contexts);
  38
  39 #define arch_nmi_enter()                                                        \
  40         do {                                                                    \
  41                 if (is_kernel_in_hyp_mode()) {                                  \
  42                         struct nmi_ctx *nmi_ctx = this_cpu_ptr(&nmi_contexts);  \
  43                         nmi_ctx->hcr = read_sysreg(hcr_el2);                    \
  44                         if (!(nmi_ctx->hcr & HCR_TGE)) {                        \
  45                                 write_sysreg(nmi_ctx->hcr | HCR_TGE, hcr_el2);  \
  46                                 isb();                                          \
  47                         }                                                       \
  48                 }                                                               \
  49         } while (0)
  50
  51 #define arch_nmi_exit()                                                         \
  52         do {                                                                    \
  53                 if (is_kernel_in_hyp_mode()) {                                  \
  54                         struct nmi_ctx *nmi_ctx = this_cpu_ptr(&nmi_contexts);  \
  55                         if (!(nmi_ctx->hcr & HCR_TGE))                          \
  56                                 write_sysreg(nmi_ctx->hcr, hcr_el2);            \
  57                 }                                                               \
  58         } while (0)
  59
  60 static inline void ack_bad_irq(unsigned int irq)
  61 {
  62         extern unsigned long irq_err_count;
  63         irq_err_count++;
  64 }
  65
  66 #endif /* __ASM_HARDIRQ_H */