arm64: kernel: Add arch-specific SDEI entry code and CPU masking

[mirror_ubuntu-bionic-kernel.git] / arch / arm64 / include / asm / sdei.h

diff --git a/arch/arm64/include/asm/sdei.h b/arch/arm64/include/asm/sdei.h
index 59f26b6e673d6ea0439f7271d6f86467948e878b..d58a31ab525a3f0b49dcad756e2fd08e1a517641 100644 (file)
--- a/arch/arm64/include/asm/sdei.h
+++ b/arch/arm64/include/asm/sdei.h
@@ -3,6 +3,49 @@
 #ifndef __ASM_SDEI_H
 #define __ASM_SDEI_H
 
-/* Later patches add the arch specific bits */
+/* Values for sdei_exit_mode */
+#define SDEI_EXIT_HVC  0
+#define SDEI_EXIT_SMC  1
 
-#endif /* __ASM_SDEI_H */
+#define SDEI_STACK_SIZE                IRQ_STACK_SIZE
+
+#ifndef __ASSEMBLY__
+
+#include <linux/linkage.h>
+#include <linux/preempt.h>
+#include <linux/types.h>
+
+#include <asm/virt.h>
+
+extern unsigned long sdei_exit_mode;
+
+/* Software Delegated Exception entry point from firmware*/
+asmlinkage void __sdei_asm_handler(unsigned long event_num, unsigned long arg,
+                                  unsigned long pc, unsigned long pstate);
+
+/*
+ * The above entry point does the minimum to call C code. This function does
+ * anything else, before calling the driver.
+ */
+struct sdei_registered_event;
+asmlinkage unsigned long __sdei_handler(struct pt_regs *regs,
+                                       struct sdei_registered_event *arg);
+
+unsigned long sdei_arch_get_entry_point(int conduit);
+#define sdei_arch_get_entry_point(x)   sdei_arch_get_entry_point(x)
+
+bool _on_sdei_stack(unsigned long sp);
+static inline bool on_sdei_stack(unsigned long sp)
+{
+       if (!IS_ENABLED(CONFIG_VMAP_STACK))
+               return false;
+       if (!IS_ENABLED(CONFIG_ARM_SDE_INTERFACE))
+               return false;
+       if (in_nmi())
+               return _on_sdei_stack(sp);
+
+       return false;
+}
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ASM_SDEI_H */