diff options
Diffstat (limited to 'arch/x86/kernel/entry_64.S')
| -rw-r--r-- | arch/x86/kernel/entry_64.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 3fe8239fd8fb..debd851de6ff 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -1532,6 +1532,13 @@ ENTRY(nmi) pushq_cfi %rdx /* + * If %cs was not the kernel segment, then the NMI triggered in user + * space, which means it is definitely not nested. + */ + cmp $__KERNEL_CS, 16(%rsp) + jne first_nmi + + /* * Check the special variable on the stack to see if NMIs are * executing. */ |