diff options
Diffstat (limited to 'arch/arm64/kernel/traps.c')
| -rw-r--r-- | arch/arm64/kernel/traps.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 4731133286b3..5b830be79c01 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -440,9 +440,10 @@ int cpu_enable_cache_maint_trap(void *__unused) } #define __user_cache_maint(insn, address, res) \ - if (untagged_addr(address) >= user_addr_max()) \ + if (untagged_addr(address) >= user_addr_max()) { \ res = -EFAULT; \ - else \ + } else { \ + uaccess_ttbr0_enable(); \ asm volatile ( \ "1: " insn ", %1\n" \ " mov %w0, #0\n" \ @@ -454,7 +455,9 @@ int cpu_enable_cache_maint_trap(void *__unused) " .popsection\n" \ _ASM_EXTABLE(1b, 3b) \ : "=r" (res) \ - : "r" (address), "i" (-EFAULT) ) + : "r" (address), "i" (-EFAULT)); \ + uaccess_ttbr0_disable(); \ + } static void user_cache_maint_handler(unsigned int esr, struct pt_regs *regs) { |