Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 243 insertions, 0 deletions

diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h
new file mode 100644
index 000000000..42cd4cd38
--- /dev/null
+++ b/arch/sparc/include/asm/thread_info_64.h
@@ -0,0 +1,243 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* thread_info.h: sparc64 low-level thread information
+ *
+ * Copyright (C) 2002  David S. Miller (davem@redhat.com)
+ */
+
+#ifndef _ASM_THREAD_INFO_H
+#define _ASM_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#define NSWINS		7
+
+#define TI_FLAG_BYTE_FAULT_CODE		0
+#define TI_FLAG_FAULT_CODE_SHIFT	56
+#define TI_FLAG_BYTE_WSTATE		1
+#define TI_FLAG_WSTATE_SHIFT		48
+#define TI_FLAG_BYTE_NOERROR		2
+#define TI_FLAG_BYTE_NOERROR_SHIFT	40
+#define TI_FLAG_BYTE_FPDEPTH		3
+#define TI_FLAG_FPDEPTH_SHIFT		32
+#define TI_FLAG_BYTE_CWP		4
+#define TI_FLAG_CWP_SHIFT		24
+#define TI_FLAG_BYTE_WSAVED		5
+#define TI_FLAG_WSAVED_SHIFT		16
+
+#include <asm/page.h>
+
+#ifndef __ASSEMBLY__
+
+#include <asm/ptrace.h>
+#include <asm/types.h>
+
+struct task_struct;
+
+struct thread_info {
+	/* D$ line 1 */
+	struct task_struct	*task;
+	unsigned long		flags;
+	__u8			fpsaved[7];
+	__u8			status;
+	unsigned long		ksp;
+
+	/* D$ line 2 */
+	unsigned long		fault_address;
+	struct pt_regs		*kregs;
+	int			preempt_count;	/* 0 => preemptable, <0 => BUG */
+	__u8			new_child;
+	__u8			current_ds;
+	__u16			cpu;
+
+	unsigned long		*utraps;
+
+	struct reg_window 	reg_window[NSWINS];
+	unsigned long 		rwbuf_stkptrs[NSWINS];
+
+	unsigned long		gsr[7];
+	unsigned long		xfsr[7];
+
+	struct pt_regs		*kern_una_regs;
+	unsigned int		kern_una_insn;
+
+	unsigned long		fpregs[(7 * 256) / sizeof(unsigned long)]
+		__attribute__ ((aligned(64)));
+};
+
+#endif /* !(__ASSEMBLY__) */
+
+/* offsets into the thread_info struct for assembly code access */
+#define TI_TASK		0x00000000
+#define TI_FLAGS	0x00000008
+#define TI_FAULT_CODE	(TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE)
+#define TI_WSTATE	(TI_FLAGS + TI_FLAG_BYTE_WSTATE)
+#define TI_CWP		(TI_FLAGS + TI_FLAG_BYTE_CWP)
+#define TI_FPDEPTH	(TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
+#define TI_WSAVED	(TI_FLAGS + TI_FLAG_BYTE_WSAVED)
+#define TI_SYS_NOERROR	(TI_FLAGS + TI_FLAG_BYTE_NOERROR)
+#define TI_FPSAVED	0x00000010
+#define TI_KSP		0x00000018
+#define TI_FAULT_ADDR	0x00000020
+#define TI_KREGS	0x00000028
+#define TI_PRE_COUNT	0x00000030
+#define TI_NEW_CHILD	0x00000034
+#define TI_CURRENT_DS	0x00000035
+#define TI_CPU		0x00000036
+#define TI_UTRAPS	0x00000038
+#define TI_REG_WINDOW	0x00000040
+#define TI_RWIN_SPTRS	0x000003c0
+#define TI_GSR		0x000003f8
+#define TI_XFSR		0x00000430
+#define TI_KUNA_REGS	0x00000468
+#define TI_KUNA_INSN	0x00000470
+#define TI_FPREGS	0x00000480
+
+/* We embed this in the uppermost byte of thread_info->flags */
+#define FAULT_CODE_WRITE	0x01	/* Write access, implies D-TLB	   */
+#define FAULT_CODE_DTLB		0x02	/* Miss happened in D-TLB	   */
+#define FAULT_CODE_ITLB		0x04	/* Miss happened in I-TLB	   */
+#define FAULT_CODE_WINFIXUP	0x08	/* Miss happened during spill/fill */
+#define FAULT_CODE_BLKCOMMIT	0x10	/* Use blk-commit ASI in copy_page */
+#define	FAULT_CODE_BAD_RA	0x20	/* Bad RA for sun4v		   */
+
+#if PAGE_SHIFT == 13
+#define THREAD_SIZE (2*PAGE_SIZE)
+#define THREAD_SHIFT (PAGE_SHIFT + 1)
+#else /* PAGE_SHIFT == 13 */
+#define THREAD_SIZE PAGE_SIZE
+#define THREAD_SHIFT PAGE_SHIFT
+#endif /* PAGE_SHIFT == 13 */
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ */
+#ifndef __ASSEMBLY__
+
+#define INIT_THREAD_INFO(tsk)				\
+{							\
+	.task		=	&tsk,			\
+	.current_ds	=	ASI_P,			\
+	.preempt_count	=	INIT_PREEMPT_COUNT,	\
+}
+
+/* how to get the thread information struct from C */
+#ifndef BUILD_VDSO
+register struct thread_info *current_thread_info_reg asm("g6");
+#define current_thread_info()	(current_thread_info_reg)
+#else
+extern struct thread_info *current_thread_info(void);
+#endif
+
+/* thread information allocation */
+#if PAGE_SHIFT == 13
+#define THREAD_SIZE_ORDER	1
+#else /* PAGE_SHIFT == 13 */
+#define THREAD_SIZE_ORDER	0
+#endif /* PAGE_SHIFT == 13 */
+
+#define __thread_flag_byte_ptr(ti)	\
+	((unsigned char *)(&((ti)->flags)))
+#define __cur_thread_flag_byte_ptr	__thread_flag_byte_ptr(current_thread_info())
+
+#define get_thread_fault_code()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE])
+#define set_thread_fault_code(val)	(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val))
+#define get_thread_wstate()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE])
+#define set_thread_wstate(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val))
+#define get_thread_cwp()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP])
+#define set_thread_cwp(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
+#define get_thread_noerror()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR])
+#define set_thread_noerror(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR] = (val))
+#define get_thread_fpdepth()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
+#define set_thread_fpdepth(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
+#define get_thread_wsaved()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
+#define set_thread_wsaved(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val))
+#endif /* !(__ASSEMBLY__) */
+
+/*
+ * Thread information flags, only 16 bits are available as we encode
+ * other values into the upper 6 bytes.
+ *
+ * On trap return we need to test several values:
+ *
+ * user:	need_resched, notify_resume, sigpending, wsaved
+ * kernel:	fpdepth
+ *
+ * So to check for work in the kernel case we simply load the fpdepth
+ * byte out of the flags and test it.  For the user case we encode the
+ * lower 3 bytes of flags as follows:
+ *	----------------------------------------
+ *	| wsaved | flags byte 1 | flags byte 2 |
+ *	----------------------------------------
+ * This optimizes the user test into:
+ *	ldx		[%g6 + TI_FLAGS], REG1
+ *	sethi		%hi(_TIF_USER_WORK_MASK), REG2
+ *	or		REG2, %lo(_TIF_USER_WORK_MASK), REG2
+ *	andcc		REG1, REG2, %g0
+ *	be,pt		no_work_to_do
+ *	 nop
+ */
+#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
+#define TIF_NOTIFY_RESUME	1	/* callback before returning to user */
+#define TIF_SIGPENDING		2	/* signal pending */
+#define TIF_NEED_RESCHED	3	/* rescheduling necessary */
+#define TIF_NOTIFY_SIGNAL	4	/* signal notifications exist */
+#define TIF_UNALIGNED		5	/* allowed to do unaligned accesses */
+#define TIF_UPROBE		6	/* breakpointed or singlestepped */
+#define TIF_32BIT		7	/* 32-bit binary */
+#define TIF_NOHZ		8	/* in adaptive nohz mode */
+#define TIF_SECCOMP		9	/* secure computing */
+#define TIF_SYSCALL_AUDIT	10	/* syscall auditing active */
+#define TIF_SYSCALL_TRACEPOINT	11	/* syscall tracepoint instrumentation */
+/* NOTE: Thread flags >= 12 should be ones we have no interest
+ *       in using in assembly, else we can't use the mask as
+ *       an immediate value in instructions such as andcc.
+ */
+#define TIF_MCDPER		12	/* Precise MCD exception */
+#define TIF_MEMDIE		13	/* is terminating due to OOM killer */
+#define TIF_POLLING_NRFLAG	14
+
+#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
+#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
+#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
+#define _TIF_NOTIFY_SIGNAL	(1<<TIF_NOTIFY_SIGNAL)
+#define _TIF_UNALIGNED		(1<<TIF_UNALIGNED)
+#define _TIF_UPROBE		(1<<TIF_UPROBE)
+#define _TIF_32BIT		(1<<TIF_32BIT)
+#define _TIF_NOHZ		(1<<TIF_NOHZ)
+#define _TIF_SECCOMP		(1<<TIF_SECCOMP)
+#define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)
+#define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT)
+#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
+
+#define _TIF_USER_WORK_MASK	((0xff << TI_FLAG_WSAVED_SHIFT) | \
+				 _TIF_DO_NOTIFY_RESUME_MASK | \
+				 _TIF_NEED_RESCHED)
+#define _TIF_DO_NOTIFY_RESUME_MASK	(_TIF_NOTIFY_RESUME | \
+					 _TIF_SIGPENDING | _TIF_UPROBE | \
+					 _TIF_NOTIFY_SIGNAL)
+
+#define is_32bit_task()	(test_thread_flag(TIF_32BIT))
+
+/*
+ * Thread-synchronous status.
+ *
+ * This is different from the flags in that nobody else
+ * ever touches our thread-synchronous status, so we don't
+ * have to worry about atomic accesses.
+ *
+ * Note that there are only 8 bits available.
+ */
+
+#ifndef __ASSEMBLY__
+
+#define thread32_stack_is_64bit(__SP) (((__SP) & 0x1) != 0)
+#define test_thread_64bit_stack(__SP) \
+	((test_thread_flag(TIF_32BIT) && !thread32_stack_is_64bit(__SP)) ? \
+	 false : true)
+
+#endif	/* !__ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_THREAD_INFO_H */