Adding upstream version 6.7.7.upstream/6.7.7

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

1 files changed, 0 insertions, 612 deletions

diff --git a/arch/ia64/kernel/traps.c b/arch/ia64/kernel/traps.c
deleted file mode 100644
index 53735b1d1b..0000000000
--- a/arch/ia64/kernel/traps.c
+++ /dev/null
@@ -1,612 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Architecture-specific trap handling.
- *
- * Copyright (C) 1998-2003 Hewlett-Packard Co
- *	David Mosberger-Tang <davidm@hpl.hp.com>
- *
- * 05/12/00 grao <goutham.rao@intel.com> : added isr in siginfo for SIGFPE
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched/signal.h>
-#include <linux/sched/debug.h>
-#include <linux/tty.h>
-#include <linux/vt_kern.h>		/* For unblank_screen() */
-#include <linux/export.h>
-#include <linux/extable.h>
-#include <linux/hardirq.h>
-#include <linux/kprobes.h>
-#include <linux/delay.h>		/* for ssleep() */
-#include <linux/kdebug.h>
-#include <linux/uaccess.h>
-
-#include <asm/fpswa.h>
-#include <asm/intrinsics.h>
-#include <asm/processor.h>
-#include <asm/exception.h>
-#include <asm/setup.h>
-
-fpswa_interface_t *fpswa_interface;
-EXPORT_SYMBOL(fpswa_interface);
-
-void __init
-trap_init (void)
-{
-	if (ia64_boot_param->fpswa)
-		/* FPSWA fixup: make the interface pointer a kernel virtual address: */
-		fpswa_interface = __va(ia64_boot_param->fpswa);
-}
-
-int
-die (const char *str, struct pt_regs *regs, long err)
-{
-	static struct {
-		spinlock_t lock;
-		u32 lock_owner;
-		int lock_owner_depth;
-	} die = {
-		.lock =	__SPIN_LOCK_UNLOCKED(die.lock),
-		.lock_owner = -1,
-		.lock_owner_depth = 0
-	};
-	static int die_counter;
-	int cpu = get_cpu();
-
-	if (die.lock_owner != cpu) {
-		console_verbose();
-		spin_lock_irq(&die.lock);
-		die.lock_owner = cpu;
-		die.lock_owner_depth = 0;
-		bust_spinlocks(1);
-	}
-	put_cpu();
-
-	if (++die.lock_owner_depth < 3) {
-		printk("%s[%d]: %s %ld [%d]\n",
-		current->comm, task_pid_nr(current), str, err, ++die_counter);
-		if (notify_die(DIE_OOPS, str, regs, err, 255, SIGSEGV)
-	            != NOTIFY_STOP)
-			show_regs(regs);
-		else
-			regs = NULL;
-  	} else
-		printk(KERN_ERR "Recursive die() failure, output suppressed\n");
-
-	bust_spinlocks(0);
-	die.lock_owner = -1;
-	add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
-	spin_unlock_irq(&die.lock);
-
-	if (!regs)
-		return 1;
-
-	if (panic_on_oops)
-		panic("Fatal exception");
-
-	make_task_dead(SIGSEGV);
-	return 0;
-}
-
-int
-die_if_kernel (char *str, struct pt_regs *regs, long err)
-{
-	if (!user_mode(regs))
-		return die(str, regs, err);
-	return 0;
-}
-
-void
-__kprobes ia64_bad_break (unsigned long break_num, struct pt_regs *regs)
-{
-	int sig, code;
-
-	switch (break_num) {
-	      case 0: /* unknown error (used by GCC for __builtin_abort()) */
-		if (notify_die(DIE_BREAK, "break 0", regs, break_num, TRAP_BRKPT, SIGTRAP)
-			       	== NOTIFY_STOP)
-			return;
-		if (die_if_kernel("bugcheck!", regs, break_num))
-			return;
-		sig = SIGILL; code = ILL_ILLOPC;
-		break;
-
-	      case 1: /* integer divide by zero */
-		sig = SIGFPE; code = FPE_INTDIV;
-		break;
-
-	      case 2: /* integer overflow */
-		sig = SIGFPE; code = FPE_INTOVF;
-		break;
-
-	      case 3: /* range check/bounds check */
-		sig = SIGFPE; code = FPE_FLTSUB;
-		break;
-
-	      case 4: /* null pointer dereference */
-		sig = SIGSEGV; code = SEGV_MAPERR;
-		break;
-
-	      case 5: /* misaligned data */
-		sig = SIGSEGV; code = BUS_ADRALN;
-		break;
-
-	      case 6: /* decimal overflow */
-		sig = SIGFPE; code = __FPE_DECOVF;
-		break;
-
-	      case 7: /* decimal divide by zero */
-		sig = SIGFPE; code = __FPE_DECDIV;
-		break;
-
-	      case 8: /* packed decimal error */
-		sig = SIGFPE; code = __FPE_DECERR;
-		break;
-
-	      case 9: /* invalid ASCII digit */
-		sig = SIGFPE; code = __FPE_INVASC;
-		break;
-
-	      case 10: /* invalid decimal digit */
-		sig = SIGFPE; code = __FPE_INVDEC;
-		break;
-
-	      case 11: /* paragraph stack overflow */
-		sig = SIGSEGV; code = __SEGV_PSTKOVF;
-		break;
-
-	      case 0x3f000 ... 0x3ffff:	/* bundle-update in progress */
-		sig = SIGILL; code = __ILL_BNDMOD;
-		break;
-
-	      default:
-		if ((break_num < 0x40000 || break_num > 0x100000)
-		    && die_if_kernel("Bad break", regs, break_num))
-			return;
-
-		if (break_num < 0x80000) {
-			sig = SIGILL; code = __ILL_BREAK;
-		} else {
-			if (notify_die(DIE_BREAK, "bad break", regs, break_num, TRAP_BRKPT, SIGTRAP)
-					== NOTIFY_STOP)
-				return;
-			sig = SIGTRAP; code = TRAP_BRKPT;
-		}
-	}
-	force_sig_fault(sig, code,
-			(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),
-			break_num, 0 /* clear __ISR_VALID */, 0);
-}
-
-/*
- * disabled_fph_fault() is called when a user-level process attempts to access f32..f127
- * and it doesn't own the fp-high register partition.  When this happens, we save the
- * current fph partition in the task_struct of the fpu-owner (if necessary) and then load
- * the fp-high partition of the current task (if necessary).  Note that the kernel has
- * access to fph by the time we get here, as the IVT's "Disabled FP-Register" handler takes
- * care of clearing psr.dfh.
- */
-static inline void
-disabled_fph_fault (struct pt_regs *regs)
-{
-	struct ia64_psr *psr = ia64_psr(regs);
-
-	/* first, grant user-level access to fph partition: */
-	psr->dfh = 0;
-
-	/*
-	 * Make sure that no other task gets in on this processor
-	 * while we're claiming the FPU
-	 */
-	preempt_disable();
-#ifndef CONFIG_SMP
-	{
-		struct task_struct *fpu_owner
-			= (struct task_struct *)ia64_get_kr(IA64_KR_FPU_OWNER);
-
-		if (ia64_is_local_fpu_owner(current)) {
-			preempt_enable_no_resched();
-			return;
-		}
-
-		if (fpu_owner)
-			ia64_flush_fph(fpu_owner);
-	}
-#endif /* !CONFIG_SMP */
-	ia64_set_local_fpu_owner(current);
-	if ((current->thread.flags & IA64_THREAD_FPH_VALID) != 0) {
-		__ia64_load_fpu(current->thread.fph);
-		psr->mfh = 0;
-	} else {
-		__ia64_init_fpu();
-		/*
-		 * Set mfh because the state in thread.fph does not match the state in
-		 * the fph partition.
-		 */
-		psr->mfh = 1;
-	}
-	preempt_enable_no_resched();
-}
-
-static inline int
-fp_emulate (int fp_fault, void *bundle, long *ipsr, long *fpsr, long *isr, long *pr, long *ifs,
-	    struct pt_regs *regs)
-{
-	fp_state_t fp_state;
-	fpswa_ret_t ret;
-
-	if (!fpswa_interface)
-		return -1;
-
-	memset(&fp_state, 0, sizeof(fp_state_t));
-
-	/*
-	 * compute fp_state.  only FP registers f6 - f11 are used by the
-	 * kernel, so set those bits in the mask and set the low volatile
-	 * pointer to point to these registers.
-	 */
-	fp_state.bitmask_low64 = 0xfc0;  /* bit6..bit11 */
-
-	fp_state.fp_state_low_volatile = (fp_state_low_volatile_t *) &regs->f6;
-	/*
-	 * unsigned long (*EFI_FPSWA) (
-	 *      unsigned long    trap_type,
-	 *	void             *Bundle,
-	 *	unsigned long    *pipsr,
-	 *	unsigned long    *pfsr,
-	 *	unsigned long    *pisr,
-	 *	unsigned long    *ppreds,
-	 *	unsigned long    *pifs,
-	 *	void             *fp_state);
-	 */
-	ret = (*fpswa_interface->fpswa)((unsigned long) fp_fault, bundle,
-					(unsigned long *) ipsr, (unsigned long *) fpsr,
-					(unsigned long *) isr, (unsigned long *) pr,
-					(unsigned long *) ifs, &fp_state);
-
-	return ret.status;
-}
-
-struct fpu_swa_msg {
-	unsigned long count;
-	unsigned long time;
-};
-static DEFINE_PER_CPU(struct fpu_swa_msg, cpulast);
-DECLARE_PER_CPU(struct fpu_swa_msg, cpulast);
-static struct fpu_swa_msg last __cacheline_aligned;
-
-
-/*
- * Handle floating-point assist faults and traps.
- */
-static int
-handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr)
-{
-	long exception, bundle[2];
-	unsigned long fault_ip;
-
-	fault_ip = regs->cr_iip;
-	if (!fp_fault && (ia64_psr(regs)->ri == 0))
-		fault_ip -= 16;
-	if (copy_from_user(bundle, (void __user *) fault_ip, sizeof(bundle)))
-		return -1;
-
-	if (!(current->thread.flags & IA64_THREAD_FPEMU_NOPRINT))  {
-		unsigned long count, current_jiffies = jiffies;
-		struct fpu_swa_msg *cp = this_cpu_ptr(&cpulast);
-
-		if (unlikely(current_jiffies > cp->time))
-			cp->count = 0;
-		if (unlikely(cp->count < 5)) {
-			cp->count++;
-			cp->time = current_jiffies + 5 * HZ;
-
-			/* minimize races by grabbing a copy of count BEFORE checking last.time. */
-			count = last.count;
-			barrier();
-
-			/*
-			 * Lower 4 bits are used as a count. Upper bits are a sequence
-			 * number that is updated when count is reset. The cmpxchg will
-			 * fail is seqno has changed. This minimizes multiple cpus
-			 * resetting the count.
-			 */
-			if (current_jiffies > last.time)
-				(void) cmpxchg_acq(&last.count, count, 16 + (count & ~15));
-
-			/* used fetchadd to atomically update the count */
-			if ((last.count & 15) < 5 && (ia64_fetchadd(1, &last.count, acq) & 15) < 5) {
-				last.time = current_jiffies + 5 * HZ;
-				printk(KERN_WARNING
-		       			"%s(%d): floating-point assist fault at ip %016lx, isr %016lx\n",
-		       			current->comm, task_pid_nr(current), regs->cr_iip + ia64_psr(regs)->ri, isr);
-			}
-		}
-	}
-
-	exception = fp_emulate(fp_fault, bundle, &regs->cr_ipsr, &regs->ar_fpsr, &isr, &regs->pr,
-			       &regs->cr_ifs, regs);
-	if (fp_fault) {
-		if (exception == 0) {
-			/* emulation was successful */
-			ia64_increment_ip(regs);
-		} else if (exception == -1) {
-			printk(KERN_ERR "handle_fpu_swa: fp_emulate() returned -1\n");
-			return -1;
-		} else {
-			/* is next instruction a trap? */
-			int si_code;
-
-			if (exception & 2) {
-				ia64_increment_ip(regs);
-			}
-			si_code = FPE_FLTUNK;	/* default code */
-			if (isr & 0x11) {
-				si_code = FPE_FLTINV;
-			} else if (isr & 0x22) {
-				/* denormal operand gets the same si_code as underflow 
-				* see arch/i386/kernel/traps.c:math_error()  */
-				si_code = FPE_FLTUND;
-			} else if (isr & 0x44) {
-				si_code = FPE_FLTDIV;
-			}
-			force_sig_fault(SIGFPE, si_code,
-					(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),
-					0, __ISR_VALID, isr);
-		}
-	} else {
-		if (exception == -1) {
-			printk(KERN_ERR "handle_fpu_swa: fp_emulate() returned -1\n");
-			return -1;
-		} else if (exception != 0) {
-			/* raise exception */
-			int si_code;
-
-			si_code = FPE_FLTUNK;	/* default code */
-			if (isr & 0x880) {
-				si_code = FPE_FLTOVF;
-			} else if (isr & 0x1100) {
-				si_code = FPE_FLTUND;
-			} else if (isr & 0x2200) {
-				si_code = FPE_FLTRES;
-			}
-			force_sig_fault(SIGFPE, si_code,
-					(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),
-					0, __ISR_VALID, isr);
-		}
-	}
-	return 0;
-}
-
-struct illegal_op_return {
-	unsigned long fkt, arg1, arg2, arg3;
-};
-
-struct illegal_op_return
-ia64_illegal_op_fault (unsigned long ec, long arg1, long arg2, long arg3,
-		       long arg4, long arg5, long arg6, long arg7,
-		       struct pt_regs regs)
-{
-	struct illegal_op_return rv;
-	char buf[128];
-
-#ifdef CONFIG_IA64_BRL_EMU
-	{
-		extern struct illegal_op_return ia64_emulate_brl (struct pt_regs *, unsigned long);
-
-		rv = ia64_emulate_brl(&regs, ec);
-		if (rv.fkt != (unsigned long) -1)
-			return rv;
-	}
-#endif
-
-	sprintf(buf, "IA-64 Illegal operation fault");
-	rv.fkt = 0;
-	if (die_if_kernel(buf, &regs, 0))
-		return rv;
-
-	force_sig_fault(SIGILL, ILL_ILLOPC,
-			(void __user *) (regs.cr_iip + ia64_psr(&regs)->ri),
-			0, 0, 0);
-	return rv;
-}
-
-void __kprobes
-ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa,
-	    unsigned long iim, unsigned long itir, long arg5, long arg6,
-	    long arg7, struct pt_regs regs)
-{
-	unsigned long code, error = isr, iip;
-	char buf[128];
-	int result, sig, si_code;
-	static const char *reason[] = {
-		"IA-64 Illegal Operation fault",
-		"IA-64 Privileged Operation fault",
-		"IA-64 Privileged Register fault",
-		"IA-64 Reserved Register/Field fault",
-		"Disabled Instruction Set Transition fault",
-		"Unknown fault 5", "Unknown fault 6", "Unknown fault 7", "Illegal Hazard fault",
-		"Unknown fault 9", "Unknown fault 10", "Unknown fault 11", "Unknown fault 12",
-		"Unknown fault 13", "Unknown fault 14", "Unknown fault 15"
-	};
-
-	if ((isr & IA64_ISR_NA) && ((isr & IA64_ISR_CODE_MASK) == IA64_ISR_CODE_LFETCH)) {
-		/*
-		 * This fault was due to lfetch.fault, set "ed" bit in the psr to cancel
-		 * the lfetch.
-		 */
-		ia64_psr(&regs)->ed = 1;
-		return;
-	}
-
-	iip = regs.cr_iip + ia64_psr(&regs)->ri;
-
-	switch (vector) {
-	      case 24: /* General Exception */
-		code = (isr >> 4) & 0xf;
-		sprintf(buf, "General Exception: %s%s", reason[code],
-			(code == 3) ? ((isr & (1UL << 37))
-				       ? " (RSE access)" : " (data access)") : "");
-		if (code == 8) {
-# ifdef CONFIG_IA64_PRINT_HAZARDS
-			printk("%s[%d]: possible hazard @ ip=%016lx (pr = %016lx)\n",
-			       current->comm, task_pid_nr(current),
-			       regs.cr_iip + ia64_psr(&regs)->ri, regs.pr);
-# endif
-			return;
-		}
-		break;
-
-	      case 25: /* Disabled FP-Register */
-		if (isr & 2) {
-			disabled_fph_fault(&regs);
-			return;
-		}
-		sprintf(buf, "Disabled FPL fault---not supposed to happen!");
-		break;
-
-	      case 26: /* NaT Consumption */
-		if (user_mode(&regs)) {
-			void __user *addr;
-
-			if (((isr >> 4) & 0xf) == 2) {
-				/* NaT page consumption */
-				sig = SIGSEGV;
-				code = SEGV_ACCERR;
-				addr = (void __user *) ifa;
-			} else {
-				/* register NaT consumption */
-				sig = SIGILL;
-				code = ILL_ILLOPN;
-				addr = (void __user *) (regs.cr_iip
-							+ ia64_psr(&regs)->ri);
-			}
-			force_sig_fault(sig, code, addr,
-					vector, __ISR_VALID, isr);
-			return;
-		} else if (ia64_done_with_exception(&regs))
-			return;
-		sprintf(buf, "NaT consumption");
-		break;
-
-	      case 31: /* Unsupported Data Reference */
-		if (user_mode(&regs)) {
-			force_sig_fault(SIGILL, ILL_ILLOPN, (void __user *) iip,
-					vector, __ISR_VALID, isr);
-			return;
-		}
-		sprintf(buf, "Unsupported data reference");
-		break;
-
-	      case 29: /* Debug */
-	      case 35: /* Taken Branch Trap */
-	      case 36: /* Single Step Trap */
-		if (fsys_mode(current, &regs)) {
-			extern char __kernel_syscall_via_break[];
-			/*
-			 * Got a trap in fsys-mode: Taken Branch Trap
-			 * and Single Step trap need special handling;
-			 * Debug trap is ignored (we disable it here
-			 * and re-enable it in the lower-privilege trap).
-			 */
-			if (unlikely(vector == 29)) {
-				set_thread_flag(TIF_DB_DISABLED);
-				ia64_psr(&regs)->db = 0;
-				ia64_psr(&regs)->lp = 1;
-				return;
-			}
-			/* re-do the system call via break 0x100000: */
-			regs.cr_iip = (unsigned long) __kernel_syscall_via_break;
-			ia64_psr(&regs)->ri = 0;
-			ia64_psr(&regs)->cpl = 3;
-			return;
-		}
-		switch (vector) {
-		      default:
-		      case 29:
-			si_code = TRAP_HWBKPT;
-#ifdef CONFIG_ITANIUM
-			/*
-			 * Erratum 10 (IFA may contain incorrect address) now has
-			 * "NoFix" status.  There are no plans for fixing this.
-			 */
-			if (ia64_psr(&regs)->is == 0)
-			  ifa = regs.cr_iip;
-#endif
-			break;
-		      case 35: si_code = TRAP_BRANCH; ifa = 0; break;
-		      case 36: si_code = TRAP_TRACE; ifa = 0; break;
-		}
-		if (notify_die(DIE_FAULT, "ia64_fault", &regs, vector, si_code, SIGTRAP)
-			       	== NOTIFY_STOP)
-			return;
-		force_sig_fault(SIGTRAP, si_code, (void __user *) ifa,
-				0, __ISR_VALID, isr);
-		return;
-
-	      case 32: /* fp fault */
-	      case 33: /* fp trap */
-		result = handle_fpu_swa((vector == 32) ? 1 : 0, &regs, isr);
-		if ((result < 0) || (current->thread.flags & IA64_THREAD_FPEMU_SIGFPE)) {
-			force_sig_fault(SIGFPE, FPE_FLTINV, (void __user *) iip,
-					0, __ISR_VALID, isr);
-		}
-		return;
-
-	      case 34:
-		if (isr & 0x2) {
-			/* Lower-Privilege Transfer Trap */
-
-			/* If we disabled debug traps during an fsyscall,
-			 * re-enable them here.
-			 */
-			if (test_thread_flag(TIF_DB_DISABLED)) {
-				clear_thread_flag(TIF_DB_DISABLED);
-				ia64_psr(&regs)->db = 1;
-			}
-
-			/*
-			 * Just clear PSR.lp and then return immediately:
-			 * all the interesting work (e.g., signal delivery)
-			 * is done in the kernel exit path.
-			 */
-			ia64_psr(&regs)->lp = 0;
-			return;
-		} else {
-			/* Unimplemented Instr. Address Trap */
-			if (user_mode(&regs)) {
-				force_sig_fault(SIGILL, ILL_BADIADDR,
-						(void __user *) iip,
-						0, 0, 0);
-				return;
-			}
-			sprintf(buf, "Unimplemented Instruction Address fault");
-		}
-		break;
-
-	      case 45:
-		printk(KERN_ERR "Unexpected IA-32 exception (Trap 45)\n");
-		printk(KERN_ERR "  iip - 0x%lx, ifa - 0x%lx, isr - 0x%lx\n",
-		       iip, ifa, isr);
-		force_sig(SIGSEGV);
-		return;
-
-	      case 46:
-		printk(KERN_ERR "Unexpected IA-32 intercept trap (Trap 46)\n");
-		printk(KERN_ERR "  iip - 0x%lx, ifa - 0x%lx, isr - 0x%lx, iim - 0x%lx\n",
-		       iip, ifa, isr, iim);
-		force_sig(SIGSEGV);
-		return;
-
-	      case 47:
-		sprintf(buf, "IA-32 Interruption Fault (int 0x%lx)", isr >> 16);
-		break;
-
-	      default:
-		sprintf(buf, "Fault %lu", vector);
-		break;
-	}
-	if (!die_if_kernel(buf, &regs, error))
-		force_sig(SIGILL);
-}