diff options
| author | Joerg Roedel <jroedel@suse.de> | 2021-03-03 15:17:12 +0100 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-03-08 14:22:17 +0100 |
| commit | 78a81d88f60ba773cbe890205e1ee67f00502948 (patch) | |
| tree | d1f24b0b047de5c66ca0fe361c3fd6492e3952df /arch/x86/entry/entry_64_compat.S | |
| parent | 5d5675df792ff67e74a500c4c94db0f99e6a10ef (diff) | |
| download | linux-78a81d88f60ba773cbe890205e1ee67f00502948.tar.bz2 | |
x86/sev-es: Introduce ip_within_syscall_gap() helper
Introduce a helper to check whether an exception came from the syscall
gap and use it in the SEV-ES code. Extend the check to also cover the
compatibility SYSCALL entry path.
Fixes: 315562c9af3d5 ("x86/sev-es: Adjust #VC IST Stack on entering NMI handler")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: stable@vger.kernel.org # 5.10+
Link: https://lkml.kernel.org/r/20210303141716.29223-2-joro@8bytes.org
Diffstat (limited to 'arch/x86/entry/entry_64_compat.S')
| -rw-r--r-- | arch/x86/entry/entry_64_compat.S | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/entry/entry_64_compat.S b/arch/x86/entry/entry_64_compat.S index 541fdaf64045..0051cf5c792d 100644 --- a/arch/x86/entry/entry_64_compat.S +++ b/arch/x86/entry/entry_64_compat.S @@ -210,6 +210,8 @@ SYM_CODE_START(entry_SYSCALL_compat) /* Switch to the kernel stack */ movq PER_CPU_VAR(cpu_current_top_of_stack), %rsp +SYM_INNER_LABEL(entry_SYSCALL_compat_safe_stack, SYM_L_GLOBAL) + /* Construct struct pt_regs on stack */ pushq $__USER32_DS /* pt_regs->ss */ pushq %r8 /* pt_regs->sp */ |