Merge tag 'asm-generic-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic updates from Arnd Bergmann:
 "There are three sets of updates for 5.18 in the asm-generic tree:

   - The set_fs()/get_fs() infrastructure gets removed for good.

     This was already gone from all major architectures, but now we can
     finally remove it everywhere, which loses some particularly tricky
     and error-prone code. There is a small merge conflict against a
     parisc cleanup, the solution is to use their new version.

   - The nds32 architecture ends its tenure in the Linux kernel.

     The hardware is still used and the code is in reasonable shape, but
     the mainline port is not actively maintained any more, as all
     remaining users are thought to run vendor kernels that would never
     be updated to a future release.

   - A series from Masahiro Yamada cleans up some of the uapi header
     files to pass the compile-time checks"

* tag 'asm-generic-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (27 commits)
  nds32: Remove the architecture
  uaccess: remove CONFIG_SET_FS
  ia64: remove CONFIG_SET_FS support
  sh: remove CONFIG_SET_FS support
  sparc64: remove CONFIG_SET_FS support
  lib/test_lockup: fix kernel pointer check for separate address spaces
  uaccess: generalize access_ok()
  uaccess: fix type mismatch warnings from access_ok()
  arm64: simplify access_ok()
  m68k: fix access_ok for coldfire
  MIPS: use simpler access_ok()
  MIPS: Handle address errors for accesses above CPU max virtual user address
  uaccess: add generic __{get,put}_kernel_nofault
  nios2: drop access_ok() check from __put_user()
  x86: use more conventional access_ok() definition
  x86: remove __range_not_ok()
  sparc64: add __{get,put}_kernel_nofault()
  nds32: fix access_ok() checks in get/put_user
  uaccess: fix nios2 and microblaze get_user_8()
  sparc64: fix building assembly files
  ...

1 files changed, 0 insertions, 266 deletions

diff --git a/arch/nds32/kernel/fpu.c b/arch/nds32/kernel/fpu.c
deleted file mode 100644
index 701c09a668de..000000000000
--- a/arch/nds32/kernel/fpu.c
+++ /dev/null
@@ -1,266 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/sched/signal.h>
-#include <asm/processor.h>
-#include <asm/user.h>
-#include <asm/io.h>
-#include <asm/bitfield.h>
-#include <asm/fpu.h>
-
-const struct fpu_struct init_fpuregs = {
-	.fd_regs = {[0 ... 31] = sNAN64},
-	.fpcsr = FPCSR_INIT,
-#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
-	.UDF_IEX_trap = 0
-#endif
-};
-
-void save_fpu(struct task_struct *tsk)
-{
-	unsigned int fpcfg, fpcsr;
-
-	enable_fpu();
-	fpcfg = ((__nds32__fmfcfg() & FPCFG_mskFREG) >> FPCFG_offFREG);
-	switch (fpcfg) {
-	case SP32_DP32_reg:
-		asm volatile ("fsdi $fd31, [%0+0xf8]\n\t"
-			      "fsdi $fd30, [%0+0xf0]\n\t"
-			      "fsdi $fd29, [%0+0xe8]\n\t"
-			      "fsdi $fd28, [%0+0xe0]\n\t"
-			      "fsdi $fd27, [%0+0xd8]\n\t"
-			      "fsdi $fd26, [%0+0xd0]\n\t"
-			      "fsdi $fd25, [%0+0xc8]\n\t"
-			      "fsdi $fd24, [%0+0xc0]\n\t"
-			      "fsdi $fd23, [%0+0xb8]\n\t"
-			      "fsdi $fd22, [%0+0xb0]\n\t"
-			      "fsdi $fd21, [%0+0xa8]\n\t"
-			      "fsdi $fd20, [%0+0xa0]\n\t"
-			      "fsdi $fd19, [%0+0x98]\n\t"
-			      "fsdi $fd18, [%0+0x90]\n\t"
-			      "fsdi $fd17, [%0+0x88]\n\t"
-			      "fsdi $fd16, [%0+0x80]\n\t"
-			      :	/* no output */
-			      : "r" (&tsk->thread.fpu)
-			      : "memory");
-		fallthrough;
-	case SP32_DP16_reg:
-		asm volatile ("fsdi $fd15, [%0+0x78]\n\t"
-			      "fsdi $fd14, [%0+0x70]\n\t"
-			      "fsdi $fd13, [%0+0x68]\n\t"
-			      "fsdi $fd12, [%0+0x60]\n\t"
-			      "fsdi $fd11, [%0+0x58]\n\t"
-			      "fsdi $fd10, [%0+0x50]\n\t"
-			      "fsdi $fd9,  [%0+0x48]\n\t"
-			      "fsdi $fd8,  [%0+0x40]\n\t"
-			      :	/* no output */
-			      : "r" (&tsk->thread.fpu)
-			      : "memory");
-		fallthrough;
-	case SP16_DP8_reg:
-		asm volatile ("fsdi $fd7,  [%0+0x38]\n\t"
-			      "fsdi $fd6,  [%0+0x30]\n\t"
-			      "fsdi $fd5,  [%0+0x28]\n\t"
-			      "fsdi $fd4,  [%0+0x20]\n\t"
-			      :	/* no output */
-			      : "r" (&tsk->thread.fpu)
-			      : "memory");
-		fallthrough;
-	case SP8_DP4_reg:
-		asm volatile ("fsdi $fd3,  [%1+0x18]\n\t"
-			      "fsdi $fd2,  [%1+0x10]\n\t"
-			      "fsdi $fd1,  [%1+0x8]\n\t"
-			      "fsdi $fd0,  [%1+0x0]\n\t"
-			      "fmfcsr	%0\n\t"
-			      "swi  %0, [%1+0x100]\n\t"
-			      : "=&r" (fpcsr)
-			      : "r"(&tsk->thread.fpu)
-			      : "memory");
-	}
-	disable_fpu();
-}
-
-void load_fpu(const struct fpu_struct *fpregs)
-{
-	unsigned int fpcfg, fpcsr;
-
-	enable_fpu();
-	fpcfg = ((__nds32__fmfcfg() & FPCFG_mskFREG) >> FPCFG_offFREG);
-	switch (fpcfg) {
-	case SP32_DP32_reg:
-		asm volatile ("fldi $fd31, [%0+0xf8]\n\t"
-			      "fldi $fd30, [%0+0xf0]\n\t"
-			      "fldi $fd29, [%0+0xe8]\n\t"
-			      "fldi $fd28, [%0+0xe0]\n\t"
-			      "fldi $fd27, [%0+0xd8]\n\t"
-			      "fldi $fd26, [%0+0xd0]\n\t"
-			      "fldi $fd25, [%0+0xc8]\n\t"
-			      "fldi $fd24, [%0+0xc0]\n\t"
-			      "fldi $fd23, [%0+0xb8]\n\t"
-			      "fldi $fd22, [%0+0xb0]\n\t"
-			      "fldi $fd21, [%0+0xa8]\n\t"
-			      "fldi $fd20, [%0+0xa0]\n\t"
-			      "fldi $fd19, [%0+0x98]\n\t"
-			      "fldi $fd18, [%0+0x90]\n\t"
-			      "fldi $fd17, [%0+0x88]\n\t"
-			      "fldi $fd16, [%0+0x80]\n\t"
-			      :	/* no output */
-			      : "r" (fpregs));
-		fallthrough;
-	case SP32_DP16_reg:
-		asm volatile ("fldi $fd15, [%0+0x78]\n\t"
-			      "fldi $fd14, [%0+0x70]\n\t"
-			      "fldi $fd13, [%0+0x68]\n\t"
-			      "fldi $fd12, [%0+0x60]\n\t"
-			      "fldi $fd11, [%0+0x58]\n\t"
-			      "fldi $fd10, [%0+0x50]\n\t"
-			      "fldi $fd9,  [%0+0x48]\n\t"
-			      "fldi $fd8,  [%0+0x40]\n\t"
-			      :	/* no output */
-			      : "r" (fpregs));
-		fallthrough;
-	case SP16_DP8_reg:
-		asm volatile ("fldi $fd7,  [%0+0x38]\n\t"
-			      "fldi $fd6,  [%0+0x30]\n\t"
-			      "fldi $fd5,  [%0+0x28]\n\t"
-			      "fldi $fd4,  [%0+0x20]\n\t"
-			      :	/* no output */
-			      : "r" (fpregs));
-		fallthrough;
-	case SP8_DP4_reg:
-		asm volatile ("fldi $fd3,  [%1+0x18]\n\t"
-			      "fldi $fd2,  [%1+0x10]\n\t"
-			      "fldi $fd1,  [%1+0x8]\n\t"
-			      "fldi $fd0,  [%1+0x0]\n\t"
-			      "lwi  %0, [%1+0x100]\n\t"
-			      "fmtcsr	%0\n\t":"=&r" (fpcsr)
-			      : "r"(fpregs));
-	}
-	disable_fpu();
-}
-void store_fpu_for_suspend(void)
-{
-#ifdef CONFIG_LAZY_FPU
-	if (last_task_used_math != NULL)
-		save_fpu(last_task_used_math);
-	last_task_used_math = NULL;
-#else
-	if (!used_math())
-		return;
-	unlazy_fpu(current);
-#endif
-	clear_fpu(task_pt_regs(current));
-}
-inline void do_fpu_context_switch(struct pt_regs *regs)
-{
-	/* Enable to use FPU. */
-
-	if (!user_mode(regs)) {
-		pr_err("BUG: FPU is used in kernel mode.\n");
-		BUG();
-		return;
-	}
-
-	enable_ptreg_fpu(regs);
-#ifdef CONFIG_LAZY_FPU	//Lazy FPU is used
-	if (last_task_used_math == current)
-		return;
-	if (last_task_used_math != NULL)
-		/* Other processes fpu state, save away */
-		save_fpu(last_task_used_math);
-	last_task_used_math = current;
-#endif
-	if (used_math()) {
-		load_fpu(&current->thread.fpu);
-	} else {
-		/* First time FPU user.  */
-		load_fpu(&init_fpuregs);
-#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
-		current->thread.fpu.UDF_IEX_trap = init_fpuregs.UDF_IEX_trap;
-#endif
-		set_used_math();
-	}
-
-}
-
-inline void fill_sigfpe_signo(unsigned int fpcsr, int *signo)
-{
-	if (fpcsr & FPCSR_mskOVFT)
-		*signo = FPE_FLTOVF;
-#ifndef CONFIG_SUPPORT_DENORMAL_ARITHMETIC
-	else if (fpcsr & FPCSR_mskUDFT)
-		*signo = FPE_FLTUND;
-#endif
-	else if (fpcsr & FPCSR_mskIVOT)
-		*signo = FPE_FLTINV;
-	else if (fpcsr & FPCSR_mskDBZT)
-		*signo = FPE_FLTDIV;
-	else if (fpcsr & FPCSR_mskIEXT)
-		*signo = FPE_FLTRES;
-}
-
-inline void handle_fpu_exception(struct pt_regs *regs)
-{
-	unsigned int fpcsr;
-	int si_code = 0, si_signo = SIGFPE;
-#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
-	unsigned long redo_except = FPCSR_mskDNIT|FPCSR_mskUDFT|FPCSR_mskIEXT;
-#else
-	unsigned long redo_except = FPCSR_mskDNIT;
-#endif
-
-	lose_fpu();
-	fpcsr = current->thread.fpu.fpcsr;
-
-	if (fpcsr & redo_except) {
-		si_signo = do_fpuemu(regs, &current->thread.fpu);
-		fpcsr = current->thread.fpu.fpcsr;
-		if (!si_signo) {
-			current->thread.fpu.fpcsr &= ~(redo_except);
-			goto done;
-		}
-	} else if (fpcsr & FPCSR_mskRIT) {
-		if (!user_mode(regs))
-			make_task_dead(SIGILL);
-		si_signo = SIGILL;
-	}
-
-	switch (si_signo) {
-	case SIGFPE:
-		fill_sigfpe_signo(fpcsr, &si_code);
-		break;
-	case SIGILL:
-		show_regs(regs);
-		si_code = ILL_COPROC;
-		break;
-	case SIGBUS:
-		si_code = BUS_ADRERR;
-		break;
-	default:
-		break;
-	}
-
-	force_sig_fault(si_signo, si_code,
-			(void __user *)instruction_pointer(regs));
-done:
-	own_fpu();
-}
-
-bool do_fpu_exception(unsigned int subtype, struct pt_regs *regs)
-{
-	int done = true;
-	/* Coprocessor disabled exception */
-	if (subtype == FPU_DISABLE_EXCEPTION) {
-		preempt_disable();
-		do_fpu_context_switch(regs);
-		preempt_enable();
-	}
-	/* Coprocessor exception such as underflow and overflow */
-	else if (subtype == FPU_EXCEPTION)
-		handle_fpu_exception(regs);
-	else
-		done = false;
-	return done;
-}