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Diffstat (limited to 'arch/arm64/kernel/entry-common.c')
-rw-r--r--arch/arm64/kernel/entry-common.c423
1 files changed, 145 insertions, 278 deletions
diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c
index 2b0c5925502e..f546a914f041 100644
--- a/arch/arm64/kernel/entry-common.c
+++ b/arch/arm64/kernel/entry-common.c
@@ -6,6 +6,7 @@
*/
#include <linux/context_tracking.h>
+#include <linux/irq-entry-common.h>
#include <linux/kasan.h>
#include <linux/linkage.h>
#include <linux/livepatch.h>
@@ -37,29 +38,20 @@
* This is intended to match the logic in irqentry_enter(), handling the kernel
* mode transitions only.
*/
-static __always_inline void __enter_from_kernel_mode(struct pt_regs *regs)
+static __always_inline irqentry_state_t __enter_from_kernel_mode(struct pt_regs *regs)
{
- regs->exit_rcu = false;
-
- if (!IS_ENABLED(CONFIG_TINY_RCU) && is_idle_task(current)) {
- lockdep_hardirqs_off(CALLER_ADDR0);
- ct_irq_enter();
- trace_hardirqs_off_finish();
-
- regs->exit_rcu = true;
- return;
- }
-
- lockdep_hardirqs_off(CALLER_ADDR0);
- rcu_irq_enter_check_tick();
- trace_hardirqs_off_finish();
+ return irqentry_enter(regs);
}
-static void noinstr enter_from_kernel_mode(struct pt_regs *regs)
+static noinstr irqentry_state_t enter_from_kernel_mode(struct pt_regs *regs)
{
- __enter_from_kernel_mode(regs);
+ irqentry_state_t state;
+
+ state = __enter_from_kernel_mode(regs);
mte_check_tfsr_entry();
mte_disable_tco_entry(current);
+
+ return state;
}
/*
@@ -70,30 +62,17 @@ static void noinstr enter_from_kernel_mode(struct pt_regs *regs)
* This is intended to match the logic in irqentry_exit(), handling the kernel
* mode transitions only, and with preemption handled elsewhere.
*/
-static __always_inline void __exit_to_kernel_mode(struct pt_regs *regs)
-{
- lockdep_assert_irqs_disabled();
-
- if (interrupts_enabled(regs)) {
- if (regs->exit_rcu) {
- trace_hardirqs_on_prepare();
- lockdep_hardirqs_on_prepare();
- ct_irq_exit();
- lockdep_hardirqs_on(CALLER_ADDR0);
- return;
- }
-
- trace_hardirqs_on();
- } else {
- if (regs->exit_rcu)
- ct_irq_exit();
- }
+static __always_inline void __exit_to_kernel_mode(struct pt_regs *regs,
+ irqentry_state_t state)
+{
+ irqentry_exit(regs, state);
}
-static void noinstr exit_to_kernel_mode(struct pt_regs *regs)
+static void noinstr exit_to_kernel_mode(struct pt_regs *regs,
+ irqentry_state_t state)
{
mte_check_tfsr_exit();
- __exit_to_kernel_mode(regs);
+ __exit_to_kernel_mode(regs, state);
}
/*
@@ -101,18 +80,15 @@ static void noinstr exit_to_kernel_mode(struct pt_regs *regs)
* Before this function is called it is not safe to call regular kernel code,
* instrumentable code, or any code which may trigger an exception.
*/
-static __always_inline void __enter_from_user_mode(void)
+static __always_inline void __enter_from_user_mode(struct pt_regs *regs)
{
- lockdep_hardirqs_off(CALLER_ADDR0);
- CT_WARN_ON(ct_state() != CT_STATE_USER);
- user_exit_irqoff();
- trace_hardirqs_off_finish();
+ enter_from_user_mode(regs);
mte_disable_tco_entry(current);
}
-static __always_inline void enter_from_user_mode(struct pt_regs *regs)
+static __always_inline void arm64_enter_from_user_mode(struct pt_regs *regs)
{
- __enter_from_user_mode();
+ __enter_from_user_mode(regs);
}
/*
@@ -120,113 +96,19 @@ static __always_inline void enter_from_user_mode(struct pt_regs *regs)
* After this function returns it is not safe to call regular kernel code,
* instrumentable code, or any code which may trigger an exception.
*/
-static __always_inline void __exit_to_user_mode(void)
-{
- trace_hardirqs_on_prepare();
- lockdep_hardirqs_on_prepare();
- user_enter_irqoff();
- lockdep_hardirqs_on(CALLER_ADDR0);
-}
-
-static void do_notify_resume(struct pt_regs *regs, unsigned long thread_flags)
-{
- do {
- local_irq_enable();
-
- if (thread_flags & (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY))
- schedule();
-
- if (thread_flags & _TIF_UPROBE)
- uprobe_notify_resume(regs);
-
- if (thread_flags & _TIF_MTE_ASYNC_FAULT) {
- clear_thread_flag(TIF_MTE_ASYNC_FAULT);
- send_sig_fault(SIGSEGV, SEGV_MTEAERR,
- (void __user *)NULL, current);
- }
-
- if (thread_flags & _TIF_PATCH_PENDING)
- klp_update_patch_state(current);
- if (thread_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
- do_signal(regs);
-
- if (thread_flags & _TIF_NOTIFY_RESUME)
- resume_user_mode_work(regs);
-
- if (thread_flags & _TIF_FOREIGN_FPSTATE)
- fpsimd_restore_current_state();
-
- local_irq_disable();
- thread_flags = read_thread_flags();
- } while (thread_flags & _TIF_WORK_MASK);
-}
-
-static __always_inline void exit_to_user_mode_prepare(struct pt_regs *regs)
+static __always_inline void arm64_exit_to_user_mode(struct pt_regs *regs)
{
- unsigned long flags;
-
local_irq_disable();
-
- flags = read_thread_flags();
- if (unlikely(flags & _TIF_WORK_MASK))
- do_notify_resume(regs, flags);
-
- local_daif_mask();
-
- lockdep_sys_exit();
-}
-
-static __always_inline void exit_to_user_mode(struct pt_regs *regs)
-{
exit_to_user_mode_prepare(regs);
+ local_daif_mask();
mte_check_tfsr_exit();
- __exit_to_user_mode();
+ exit_to_user_mode();
}
asmlinkage void noinstr asm_exit_to_user_mode(struct pt_regs *regs)
{
- exit_to_user_mode(regs);
-}
-
-/*
- * Handle IRQ/context state management when entering an NMI from user/kernel
- * mode. Before this function is called it is not safe to call regular kernel
- * code, instrumentable code, or any code which may trigger an exception.
- */
-static void noinstr arm64_enter_nmi(struct pt_regs *regs)
-{
- regs->lockdep_hardirqs = lockdep_hardirqs_enabled();
-
- __nmi_enter();
- lockdep_hardirqs_off(CALLER_ADDR0);
- lockdep_hardirq_enter();
- ct_nmi_enter();
-
- trace_hardirqs_off_finish();
- ftrace_nmi_enter();
-}
-
-/*
- * Handle IRQ/context state management when exiting an NMI from user/kernel
- * mode. After this function returns it is not safe to call regular kernel
- * code, instrumentable code, or any code which may trigger an exception.
- */
-static void noinstr arm64_exit_nmi(struct pt_regs *regs)
-{
- bool restore = regs->lockdep_hardirqs;
-
- ftrace_nmi_exit();
- if (restore) {
- trace_hardirqs_on_prepare();
- lockdep_hardirqs_on_prepare();
- }
-
- ct_nmi_exit();
- lockdep_hardirq_exit();
- if (restore)
- lockdep_hardirqs_on(CALLER_ADDR0);
- __nmi_exit();
+ arm64_exit_to_user_mode(regs);
}
/*
@@ -234,14 +116,18 @@ static void noinstr arm64_exit_nmi(struct pt_regs *regs)
* kernel mode. Before this function is called it is not safe to call regular
* kernel code, instrumentable code, or any code which may trigger an exception.
*/
-static void noinstr arm64_enter_el1_dbg(struct pt_regs *regs)
+static noinstr irqentry_state_t arm64_enter_el1_dbg(struct pt_regs *regs)
{
- regs->lockdep_hardirqs = lockdep_hardirqs_enabled();
+ irqentry_state_t state;
+
+ state.lockdep = lockdep_hardirqs_enabled();
lockdep_hardirqs_off(CALLER_ADDR0);
ct_nmi_enter();
trace_hardirqs_off_finish();
+
+ return state;
}
/*
@@ -249,62 +135,19 @@ static void noinstr arm64_enter_el1_dbg(struct pt_regs *regs)
* kernel mode. After this function returns it is not safe to call regular
* kernel code, instrumentable code, or any code which may trigger an exception.
*/
-static void noinstr arm64_exit_el1_dbg(struct pt_regs *regs)
+static void noinstr arm64_exit_el1_dbg(struct pt_regs *regs,
+ irqentry_state_t state)
{
- bool restore = regs->lockdep_hardirqs;
-
- if (restore) {
+ if (state.lockdep) {
trace_hardirqs_on_prepare();
lockdep_hardirqs_on_prepare();
}
ct_nmi_exit();
- if (restore)
+ if (state.lockdep)
lockdep_hardirqs_on(CALLER_ADDR0);
}
-#ifdef CONFIG_PREEMPT_DYNAMIC
-DEFINE_STATIC_KEY_TRUE(sk_dynamic_irqentry_exit_cond_resched);
-#define need_irq_preemption() \
- (static_branch_unlikely(&sk_dynamic_irqentry_exit_cond_resched))
-#else
-#define need_irq_preemption() (IS_ENABLED(CONFIG_PREEMPTION))
-#endif
-
-static void __sched arm64_preempt_schedule_irq(void)
-{
- if (!need_irq_preemption())
- return;
-
- /*
- * Note: thread_info::preempt_count includes both thread_info::count
- * and thread_info::need_resched, and is not equivalent to
- * preempt_count().
- */
- if (READ_ONCE(current_thread_info()->preempt_count) != 0)
- return;
-
- /*
- * DAIF.DA are cleared at the start of IRQ/FIQ handling, and when GIC
- * priority masking is used the GIC irqchip driver will clear DAIF.IF
- * using gic_arch_enable_irqs() for normal IRQs. If anything is set in
- * DAIF we must have handled an NMI, so skip preemption.
- */
- if (system_uses_irq_prio_masking() && read_sysreg(daif))
- return;
-
- /*
- * Preempting a task from an IRQ means we leave copies of PSTATE
- * on the stack. cpufeature's enable calls may modify PSTATE, but
- * resuming one of these preempted tasks would undo those changes.
- *
- * Only allow a task to be preempted once cpufeatures have been
- * enabled.
- */
- if (system_capabilities_finalized())
- preempt_schedule_irq();
-}
-
static void do_interrupt_handler(struct pt_regs *regs,
void (*handler)(struct pt_regs *))
{
@@ -324,7 +167,7 @@ extern void (*handle_arch_fiq)(struct pt_regs *);
static void noinstr __panic_unhandled(struct pt_regs *regs, const char *vector,
unsigned long esr)
{
- arm64_enter_nmi(regs);
+ irqentry_nmi_enter(regs);
console_verbose();
@@ -475,73 +318,87 @@ UNHANDLED(el1t, 64, error)
static void noinstr el1_abort(struct pt_regs *regs, unsigned long esr)
{
unsigned long far = read_sysreg(far_el1);
+ irqentry_state_t state;
- enter_from_kernel_mode(regs);
+ state = enter_from_kernel_mode(regs);
local_daif_inherit(regs);
do_mem_abort(far, esr, regs);
local_daif_mask();
- exit_to_kernel_mode(regs);
+ exit_to_kernel_mode(regs, state);
}
static void noinstr el1_pc(struct pt_regs *regs, unsigned long esr)
{
unsigned long far = read_sysreg(far_el1);
+ irqentry_state_t state;
- enter_from_kernel_mode(regs);
+ state = enter_from_kernel_mode(regs);
local_daif_inherit(regs);
do_sp_pc_abort(far, esr, regs);
local_daif_mask();
- exit_to_kernel_mode(regs);
+ exit_to_kernel_mode(regs, state);
}
static void noinstr el1_undef(struct pt_regs *regs, unsigned long esr)
{
- enter_from_kernel_mode(regs);
+ irqentry_state_t state;
+
+ state = enter_from_kernel_mode(regs);
local_daif_inherit(regs);
do_el1_undef(regs, esr);
local_daif_mask();
- exit_to_kernel_mode(regs);
+ exit_to_kernel_mode(regs, state);
}
static void noinstr el1_bti(struct pt_regs *regs, unsigned long esr)
{
- enter_from_kernel_mode(regs);
+ irqentry_state_t state;
+
+ state = enter_from_kernel_mode(regs);
local_daif_inherit(regs);
do_el1_bti(regs, esr);
local_daif_mask();
- exit_to_kernel_mode(regs);
+ exit_to_kernel_mode(regs, state);
}
static void noinstr el1_gcs(struct pt_regs *regs, unsigned long esr)
{
- enter_from_kernel_mode(regs);
+ irqentry_state_t state;
+
+ state = enter_from_kernel_mode(regs);
local_daif_inherit(regs);
do_el1_gcs(regs, esr);
local_daif_mask();
- exit_to_kernel_mode(regs);
+ exit_to_kernel_mode(regs, state);
}
static void noinstr el1_mops(struct pt_regs *regs, unsigned long esr)
{
- enter_from_kernel_mode(regs);
+ irqentry_state_t state;
+
+ state = enter_from_kernel_mode(regs);
local_daif_inherit(regs);
do_el1_mops(regs, esr);
local_daif_mask();
- exit_to_kernel_mode(regs);
+ exit_to_kernel_mode(regs, state);
}
static void noinstr el1_breakpt(struct pt_regs *regs, unsigned long esr)
{
- arm64_enter_el1_dbg(regs);
+ irqentry_state_t state;
+
+ state = arm64_enter_el1_dbg(regs);
debug_exception_enter(regs);
do_breakpoint(esr, regs);
debug_exception_exit(regs);
- arm64_exit_el1_dbg(regs);
+ arm64_exit_el1_dbg(regs, state);
}
static void noinstr el1_softstp(struct pt_regs *regs, unsigned long esr)
{
- arm64_enter_el1_dbg(regs);
+ irqentry_state_t state;
+
+ state = arm64_enter_el1_dbg(regs);
if (!cortex_a76_erratum_1463225_debug_handler(regs)) {
debug_exception_enter(regs);
/*
@@ -554,37 +411,42 @@ static void noinstr el1_softstp(struct pt_regs *regs, unsigned long esr)
do_el1_softstep(esr, regs);
debug_exception_exit(regs);
}
- arm64_exit_el1_dbg(regs);
+ arm64_exit_el1_dbg(regs, state);
}
static void noinstr el1_watchpt(struct pt_regs *regs, unsigned long esr)
{
/* Watchpoints are the only debug exception to write FAR_EL1 */
unsigned long far = read_sysreg(far_el1);
+ irqentry_state_t state;
- arm64_enter_el1_dbg(regs);
+ state = arm64_enter_el1_dbg(regs);
debug_exception_enter(regs);
do_watchpoint(far, esr, regs);
debug_exception_exit(regs);
- arm64_exit_el1_dbg(regs);
+ arm64_exit_el1_dbg(regs, state);
}
static void noinstr el1_brk64(struct pt_regs *regs, unsigned long esr)
{
- arm64_enter_el1_dbg(regs);
+ irqentry_state_t state;
+
+ state = arm64_enter_el1_dbg(regs);
debug_exception_enter(regs);
do_el1_brk64(esr, regs);
debug_exception_exit(regs);
- arm64_exit_el1_dbg(regs);
+ arm64_exit_el1_dbg(regs, state);
}
static void noinstr el1_fpac(struct pt_regs *regs, unsigned long esr)
{
- enter_from_kernel_mode(regs);
+ irqentry_state_t state;
+
+ state = enter_from_kernel_mode(regs);
local_daif_inherit(regs);
do_el1_fpac(regs, esr);
local_daif_mask();
- exit_to_kernel_mode(regs);
+ exit_to_kernel_mode(regs, state);
}
asmlinkage void noinstr el1h_64_sync_handler(struct pt_regs *regs)
@@ -639,30 +501,32 @@ asmlinkage void noinstr el1h_64_sync_handler(struct pt_regs *regs)
static __always_inline void __el1_pnmi(struct pt_regs *regs,
void (*handler)(struct pt_regs *))
{
- arm64_enter_nmi(regs);
+ irqentry_state_t state;
+
+ state = irqentry_nmi_enter(regs);
do_interrupt_handler(regs, handler);
- arm64_exit_nmi(regs);
+ irqentry_nmi_exit(regs, state);
}
static __always_inline void __el1_irq(struct pt_regs *regs,
void (*handler)(struct pt_regs *))
{
- enter_from_kernel_mode(regs);
+ irqentry_state_t state;
+
+ state = enter_from_kernel_mode(regs);
irq_enter_rcu();
do_interrupt_handler(regs, handler);
irq_exit_rcu();
- arm64_preempt_schedule_irq();
-
- exit_to_kernel_mode(regs);
+ exit_to_kernel_mode(regs, state);
}
static void noinstr el1_interrupt(struct pt_regs *regs,
void (*handler)(struct pt_regs *))
{
write_sysreg(DAIF_PROCCTX_NOIRQ, daif);
- if (IS_ENABLED(CONFIG_ARM64_PSEUDO_NMI) && !interrupts_enabled(regs))
+ if (IS_ENABLED(CONFIG_ARM64_PSEUDO_NMI) && regs_irqs_disabled(regs))
__el1_pnmi(regs, handler);
else
__el1_irq(regs, handler);
@@ -681,21 +545,22 @@ asmlinkage void noinstr el1h_64_fiq_handler(struct pt_regs *regs)
asmlinkage void noinstr el1h_64_error_handler(struct pt_regs *regs)
{
unsigned long esr = read_sysreg(esr_el1);
+ irqentry_state_t state;
local_daif_restore(DAIF_ERRCTX);
- arm64_enter_nmi(regs);
+ state = irqentry_nmi_enter(regs);
do_serror(regs, esr);
- arm64_exit_nmi(regs);
+ irqentry_nmi_exit(regs, state);
}
static void noinstr el0_da(struct pt_regs *regs, unsigned long esr)
{
unsigned long far = read_sysreg(far_el1);
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_mem_abort(far, esr, regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_ia(struct pt_regs *regs, unsigned long esr)
@@ -710,50 +575,50 @@ static void noinstr el0_ia(struct pt_regs *regs, unsigned long esr)
if (!is_ttbr0_addr(far))
arm64_apply_bp_hardening();
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_mem_abort(far, esr, regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_fpsimd_acc(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_fpsimd_acc(esr, regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_sve_acc(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_sve_acc(esr, regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_sme_acc(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_sme_acc(esr, regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_fpsimd_exc(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_fpsimd_exc(esr, regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_sys(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_el0_sys(esr, regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_pc(struct pt_regs *regs, unsigned long esr)
@@ -763,58 +628,58 @@ static void noinstr el0_pc(struct pt_regs *regs, unsigned long esr)
if (!is_ttbr0_addr(instruction_pointer(regs)))
arm64_apply_bp_hardening();
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_sp_pc_abort(far, esr, regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_sp(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_sp_pc_abort(regs->sp, esr, regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_undef(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_el0_undef(regs, esr);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_bti(struct pt_regs *regs)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_el0_bti(regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_mops(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_el0_mops(regs, esr);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_gcs(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_el0_gcs(regs, esr);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_inv(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
bad_el0_sync(regs, 0, esr);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_breakpt(struct pt_regs *regs, unsigned long esr)
@@ -822,12 +687,12 @@ static void noinstr el0_breakpt(struct pt_regs *regs, unsigned long esr)
if (!is_ttbr0_addr(regs->pc))
arm64_apply_bp_hardening();
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
debug_exception_enter(regs);
do_breakpoint(esr, regs);
debug_exception_exit(regs);
local_daif_restore(DAIF_PROCCTX);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_softstp(struct pt_regs *regs, unsigned long esr)
@@ -835,7 +700,7 @@ static void noinstr el0_softstp(struct pt_regs *regs, unsigned long esr)
if (!is_ttbr0_addr(regs->pc))
arm64_apply_bp_hardening();
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
/*
* After handling a breakpoint, we suspend the breakpoint
* and use single-step to move to the next instruction.
@@ -846,7 +711,7 @@ static void noinstr el0_softstp(struct pt_regs *regs, unsigned long esr)
local_daif_restore(DAIF_PROCCTX);
do_el0_softstep(esr, regs);
}
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_watchpt(struct pt_regs *regs, unsigned long esr)
@@ -854,39 +719,39 @@ static void noinstr el0_watchpt(struct pt_regs *regs, unsigned long esr)
/* Watchpoints are the only debug exception to write FAR_EL1 */
unsigned long far = read_sysreg(far_el1);
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
debug_exception_enter(regs);
do_watchpoint(far, esr, regs);
debug_exception_exit(regs);
local_daif_restore(DAIF_PROCCTX);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_brk64(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_el0_brk64(esr, regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_svc(struct pt_regs *regs)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
cortex_a76_erratum_1463225_svc_handler();
fpsimd_syscall_enter();
local_daif_restore(DAIF_PROCCTX);
do_el0_svc(regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
fpsimd_syscall_exit();
}
static void noinstr el0_fpac(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_el0_fpac(regs, esr);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
asmlinkage void noinstr el0t_64_sync_handler(struct pt_regs *regs)
@@ -960,7 +825,7 @@ asmlinkage void noinstr el0t_64_sync_handler(struct pt_regs *regs)
static void noinstr el0_interrupt(struct pt_regs *regs,
void (*handler)(struct pt_regs *))
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
write_sysreg(DAIF_PROCCTX_NOIRQ, daif);
@@ -971,7 +836,7 @@ static void noinstr el0_interrupt(struct pt_regs *regs,
do_interrupt_handler(regs, handler);
irq_exit_rcu();
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr __el0_irq_handler_common(struct pt_regs *regs)
@@ -997,14 +862,15 @@ asmlinkage void noinstr el0t_64_fiq_handler(struct pt_regs *regs)
static void noinstr __el0_error_handler_common(struct pt_regs *regs)
{
unsigned long esr = read_sysreg(esr_el1);
+ irqentry_state_t state;
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_ERRCTX);
- arm64_enter_nmi(regs);
+ state = irqentry_nmi_enter(regs);
do_serror(regs, esr);
- arm64_exit_nmi(regs);
+ irqentry_nmi_exit(regs, state);
local_daif_restore(DAIF_PROCCTX);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
asmlinkage void noinstr el0t_64_error_handler(struct pt_regs *regs)
@@ -1015,27 +881,27 @@ asmlinkage void noinstr el0t_64_error_handler(struct pt_regs *regs)
#ifdef CONFIG_COMPAT
static void noinstr el0_cp15(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_el0_cp15(esr, regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_svc_compat(struct pt_regs *regs)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
cortex_a76_erratum_1463225_svc_handler();
local_daif_restore(DAIF_PROCCTX);
do_el0_svc_compat(regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
static void noinstr el0_bkpt32(struct pt_regs *regs, unsigned long esr)
{
- enter_from_user_mode(regs);
+ arm64_enter_from_user_mode(regs);
local_daif_restore(DAIF_PROCCTX);
do_bkpt32(esr, regs);
- exit_to_user_mode(regs);
+ arm64_exit_to_user_mode(regs);
}
asmlinkage void noinstr el0t_32_sync_handler(struct pt_regs *regs)
@@ -1114,7 +980,7 @@ asmlinkage void noinstr __noreturn handle_bad_stack(struct pt_regs *regs)
unsigned long esr = read_sysreg(esr_el1);
unsigned long far = read_sysreg(far_el1);
- arm64_enter_nmi(regs);
+ irqentry_nmi_enter(regs);
panic_bad_stack(regs, esr, far);
}
@@ -1122,6 +988,7 @@ asmlinkage void noinstr __noreturn handle_bad_stack(struct pt_regs *regs)
asmlinkage noinstr unsigned long
__sdei_handler(struct pt_regs *regs, struct sdei_registered_event *arg)
{
+ irqentry_state_t state;
unsigned long ret;
/*
@@ -1146,9 +1013,9 @@ __sdei_handler(struct pt_regs *regs, struct sdei_registered_event *arg)
else if (cpu_has_pan())
set_pstate_pan(0);
- arm64_enter_nmi(regs);
+ state = irqentry_nmi_enter(regs);
ret = do_sdei_event(regs, arg);
- arm64_exit_nmi(regs);
+ irqentry_nmi_exit(regs, state);
return ret;
}
generated by cgit v1.2.3 (git 2.46.0) at 2025-09-30 14:13:14 +0000