diff options
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/Kconfig | 1 | ||||
| -rw-r--r-- | arch/riscv/kernel/entry.S | 16 |
2 files changed, 16 insertions, 1 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 543335df7376..b7efe87329dd 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -53,6 +53,7 @@ config RISCV select HAVE_ARCH_SECCOMP_FILTER select HAVE_ARCH_TRACEHOOK select HAVE_ASM_MODVERSIONS + select HAVE_CONTEXT_TRACKING select HAVE_COPY_THREAD_TLS select HAVE_DMA_CONTIGUOUS if MMU select HAVE_EBPF_JIT if MMU diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S index 45c81e49462d..124506ef4c5d 100644 --- a/arch/riscv/kernel/entry.S +++ b/arch/riscv/kernel/entry.S @@ -100,6 +100,16 @@ _save_context: #ifdef CONFIG_TRACE_IRQFLAGS call trace_hardirqs_off #endif + +#ifdef CONFIG_CONTEXT_TRACKING + /* If previous state is in user mode, call context_tracking_user_exit. */ + li a0, SR_PP + and a0, s1, a0 + bnez a0, skip_context_tracking + call context_tracking_user_exit +skip_context_tracking: +#endif + /* * MSB of cause differentiates between * interrupts and exceptions @@ -145,7 +155,7 @@ _save_context: tail do_trap_unknown handle_syscall: -#ifdef CONFIG_TRACE_IRQFLAGS +#if defined(CONFIG_TRACE_IRQFLAGS) || defined(CONFIG_CONTEXT_TRACKING) /* Recover a0 - a7 for system calls */ REG_L a0, PT_A0(sp) REG_L a1, PT_A1(sp) @@ -227,6 +237,10 @@ resume_userspace: andi s1, s0, _TIF_WORK_MASK bnez s1, work_pending +#ifdef CONFIG_CONTEXT_TRACKING + call context_tracking_user_enter +#endif + /* Save unwound kernel stack pointer in thread_info */ addi s0, sp, PT_SIZE_ON_STACK REG_S s0, TASK_TI_KERNEL_SP(tp) |