traps.c (34069d12e239ae8f36dd96c378e4622fb1c42a76) traps.c (bd3c5798484aa9a08302a844d7a75a2ee3b53d05)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Author: Huacai Chen <chenhuacai@loongson.cn>
4 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
5 */
6#include <linux/bitfield.h>
7#include <linux/bitops.h>
8#include <linux/bug.h>

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31#include <linux/perf_event.h>
32
33#include <asm/addrspace.h>
34#include <asm/bootinfo.h>
35#include <asm/branch.h>
36#include <asm/break.h>
37#include <asm/cpu.h>
38#include <asm/fpu.h>
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Author: Huacai Chen <chenhuacai@loongson.cn>
4 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
5 */
6#include <linux/bitfield.h>
7#include <linux/bitops.h>
8#include <linux/bug.h>

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31#include <linux/perf_event.h>
32
33#include <asm/addrspace.h>
34#include <asm/bootinfo.h>
35#include <asm/branch.h>
36#include <asm/break.h>
37#include <asm/cpu.h>
38#include <asm/fpu.h>
39#include <asm/lbt.h>
39#include <asm/inst.h>
40#include <asm/loongarch.h>
41#include <asm/mmu_context.h>
42#include <asm/pgtable.h>
43#include <asm/ptrace.h>
44#include <asm/sections.h>
45#include <asm/siginfo.h>
46#include <asm/stacktrace.h>

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961 init_restore_lasx();
962 preempt_enable();
963
964out:
965 local_irq_disable();
966 irqentry_exit(regs, state);
967}
968
40#include <asm/inst.h>
41#include <asm/loongarch.h>
42#include <asm/mmu_context.h>
43#include <asm/pgtable.h>
44#include <asm/ptrace.h>
45#include <asm/sections.h>
46#include <asm/siginfo.h>
47#include <asm/stacktrace.h>

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962 init_restore_lasx();
963 preempt_enable();
964
965out:
966 local_irq_disable();
967 irqentry_exit(regs, state);
968}
969
970static void init_restore_lbt(void)
971{
972 if (!thread_lbt_context_live()) {
973 /* First time LBT context user */
974 init_lbt();
975 set_thread_flag(TIF_LBT_CTX_LIVE);
976 } else {
977 if (!is_lbt_owner())
978 own_lbt_inatomic(1);
979 }
980
981 BUG_ON(!is_lbt_enabled());
982}
983
969asmlinkage void noinstr do_lbt(struct pt_regs *regs)
970{
971 irqentry_state_t state = irqentry_enter(regs);
972
984asmlinkage void noinstr do_lbt(struct pt_regs *regs)
985{
986 irqentry_state_t state = irqentry_enter(regs);
987
973 local_irq_enable();
974 force_sig(SIGILL);
975 local_irq_disable();
988 /*
989 * BTD (Binary Translation Disable exception) can be triggered
990 * during FP save/restore if TM (Top Mode) is on, which may
991 * cause irq_enable during 'switch_to'. To avoid this situation
992 * (including the user using 'MOVGR2GCSR' to turn on TM, which
993 * will not trigger the BTE), we need to check PRMD first.
994 */
995 if (regs->csr_prmd & CSR_PRMD_PIE)
996 local_irq_enable();
976
997
998 if (!cpu_has_lbt) {
999 force_sig(SIGILL);
1000 goto out;
1001 }
1002 BUG_ON(is_lbt_enabled());
1003
1004 preempt_disable();
1005 init_restore_lbt();
1006 preempt_enable();
1007
1008out:
1009 if (regs->csr_prmd & CSR_PRMD_PIE)
1010 local_irq_disable();
1011
977 irqentry_exit(regs, state);
978}
979
980asmlinkage void noinstr do_reserved(struct pt_regs *regs)
981{
982 irqentry_state_t state = irqentry_enter(regs);
983
984 local_irq_enable();

--- 157 unchanged lines hidden --- 		1012 irqentry_exit(regs, state);
1013}
1014
1015asmlinkage void noinstr do_reserved(struct pt_regs *regs)
1016{
1017 irqentry_state_t state = irqentry_enter(regs);
1018
1019 local_irq_enable();

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