add arm64 support

- add arm64 dependent codes with GICv3 and SVE support - fix bugs based on architecture separation requests
2017-09-05 15:06:27 +09:00
parent 704096b139
commit 9989f41fd3
192 changed files with 26941 additions and 34 deletions
--- a/arch/arm64/kernel/include/thread_info.h
+++ b/arch/arm64/kernel/include/thread_info.h
@@ -0,0 +1,100 @@
+/* thread_info.h COPYRIGHT FUJITSU LIMITED 2015-2017 */
+#ifndef __HEADER_ARM64_COMMON_THREAD_INFO_H
+#define __HEADER_ARM64_COMMON_THREAD_INFO_H
+
+#define KERNEL_STACK_SIZE	32768	/* 8 page */
+#define THREAD_START_SP		KERNEL_STACK_SIZE - 16
+
+#ifndef __ASSEMBLY__
+
+#define ALIGN_UP(x, align)     ALIGN_DOWN((x) + (align) - 1, align)
+#define ALIGN_DOWN(x, align)   ((x) & ~((align) - 1))
+
+#include <process.h>
+#include <prctl.h>
+
+struct cpu_context {
+	unsigned long x19;
+	unsigned long x20;
+	unsigned long x21;
+	unsigned long x22;
+	unsigned long x23;
+	unsigned long x24;
+	unsigned long x25;
+	unsigned long x26;
+	unsigned long x27;
+	unsigned long x28;
+	unsigned long fp;
+	unsigned long sp;
+	unsigned long pc;
+};
+
+struct thread_info {
+	unsigned long		flags;		/* low level flags */
+//	mm_segment_t		addr_limit;	/* address limit */
+//	struct task_struct	*task;		/* main task structure */
+//	struct exec_domain	*exec_domain;	/* execution domain */
+//	struct restart_block	restart_block;
+//	int			preempt_count;	/* 0 => preemptable, <0 => bug */
+	int			cpu;		/* cpu */
+	struct cpu_context	cpu_context;	/* kernel_context */
+	void			*sve_state;	/* SVE registers, if any */
+	uint16_t		sve_vl;		/* SVE vector length */
+	uint16_t		sve_vl_onexec;	/* SVE vl after next exec */
+	uint16_t		sve_flags;	/* SVE related flags */
+	unsigned long		fault_address;	/* fault info */
+	unsigned long		fault_code;	/* ESR_EL1 value */
+};
+
+/* Flags for sve_flags (intentionally defined to match the prctl flags) */
+
+/* Inherit sve_vl and sve_flags across execve(): */
+#define THREAD_VL_INHERIT	PR_SVE_SET_VL_INHERIT
+
+struct arm64_cpu_local_thread {
+	struct thread_info thread_info;
+	unsigned long paniced;		/* 136 */
+	uint64_t panic_regs[34];	/* 144 */
+};
+
+union arm64_cpu_local_variables {
+	struct arm64_cpu_local_thread arm64_cpu_local_thread;
+	unsigned long stack[KERNEL_STACK_SIZE / sizeof(unsigned long)];
+};
+extern union arm64_cpu_local_variables init_thread_info;
+
+/*
+ * how to get the current stack pointer from C
+ */
+register unsigned long current_stack_pointer asm ("sp");
+
+/*
+ * how to get the thread information struct from C
+ */
+static inline struct thread_info *current_thread_info(void)
+{
+	unsigned long ti = 0;
+
+	ti = ALIGN_DOWN(current_stack_pointer, KERNEL_STACK_SIZE);
+
+	return (struct thread_info *)ti;
+}
+
+/*
+ * how to get the pt_regs struct from C
+ */
+static inline struct pt_regs *current_pt_regs(void)
+{
+	unsigned long regs = 0;
+
+	regs = ALIGN_DOWN(current_stack_pointer, KERNEL_STACK_SIZE);
+	regs += THREAD_START_SP - sizeof(struct pt_regs);
+
+	return (struct pt_regs *)regs;
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#define TIF_SINGLESTEP		21
+
+#endif /* !__HEADER_ARM64_COMMON_THREAD_INFO_H */