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Diffstat (limited to 'arch/arm64/include/asm/hardirq.h')
-rw-r--r--arch/arm64/include/asm/hardirq.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/hardirq.h b/arch/arm64/include/asm/hardirq.h
index 1473fc2f7ab7..89691c86640a 100644
--- a/arch/arm64/include/asm/hardirq.h
+++ b/arch/arm64/include/asm/hardirq.h
@@ -17,8 +17,12 @@
#define __ASM_HARDIRQ_H
#include <linux/cache.h>
+#include <linux/percpu.h>
#include <linux/threads.h>
+#include <asm/barrier.h>
#include <asm/irq.h>
+#include <asm/kvm_arm.h>
+#include <asm/sysreg.h>
#define NR_IPI 7
@@ -37,6 +41,33 @@ u64 smp_irq_stat_cpu(unsigned int cpu);
#define __ARCH_IRQ_EXIT_IRQS_DISABLED 1
+struct nmi_ctx {
+ u64 hcr;
+};
+
+DECLARE_PER_CPU(struct nmi_ctx, nmi_contexts);
+
+#define arch_nmi_enter() \
+ do { \
+ if (is_kernel_in_hyp_mode()) { \
+ struct nmi_ctx *nmi_ctx = this_cpu_ptr(&nmi_contexts); \
+ nmi_ctx->hcr = read_sysreg(hcr_el2); \
+ if (!(nmi_ctx->hcr & HCR_TGE)) { \
+ write_sysreg(nmi_ctx->hcr | HCR_TGE, hcr_el2); \
+ isb(); \
+ } \
+ } \
+ } while (0)
+
+#define arch_nmi_exit() \
+ do { \
+ if (is_kernel_in_hyp_mode()) { \
+ struct nmi_ctx *nmi_ctx = this_cpu_ptr(&nmi_contexts); \
+ if (!(nmi_ctx->hcr & HCR_TGE)) \
+ write_sysreg(nmi_ctx->hcr, hcr_el2); \
+ } \
+ } while (0)
+
static inline void ack_bad_irq(unsigned int irq)
{
extern unsigned long irq_err_count;