diff options
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/traps.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 3602b900ff1c..58134a97928f 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -625,7 +625,20 @@ static void arm64_compat_skip_faulting_instruction(struct pt_regs *regs, arm64_skip_faulting_instruction(regs, sz); } +static void compat_cntfrq_read_handler(unsigned int esr, struct pt_regs *regs) +{ + int reg = (esr & ESR_ELx_CP15_32_ISS_RT_MASK) >> ESR_ELx_CP15_32_ISS_RT_SHIFT; + + pt_regs_write_reg(regs, reg, arch_timer_get_rate()); + arm64_compat_skip_faulting_instruction(regs, 4); +} + static struct sys64_hook cp15_32_hooks[] = { + { + .esr_mask = ESR_ELx_CP15_32_ISS_SYS_MASK, + .esr_val = ESR_ELx_CP15_32_ISS_SYS_CNTFRQ, + .handler = compat_cntfrq_read_handler, + }, {}, }; |