diff options
| author | Joerg Roedel <jroedel@suse.de> | 2020-09-07 15:16:09 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-09-09 11:33:20 +0200 |
| commit | 3ecacdbd23956a549d93023f86adc87b4a9d6520 (patch) | |
| tree | b8b381ffd9cadf91cd0d4875cb53ec81c94a61ea /arch/x86/realmode | |
| parent | 520d030852b4c9babfce9a79d8b5320b6b5545e6 (diff) | |
x86/head/64: Don't call verify_cpu() on starting APs
The APs are not ready to handle exceptions when verify_cpu() is called
in secondary_startup_64().
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20200907131613.12703-69-joro@8bytes.org
Diffstat (limited to 'arch/x86/realmode')
| -rw-r--r-- | arch/x86/realmode/init.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/realmode/init.c b/arch/x86/realmode/init.c index 3fb9b60be07a..22fda7d99159 100644 --- a/arch/x86/realmode/init.c +++ b/arch/x86/realmode/init.c @@ -46,6 +46,12 @@ static void sme_sev_setup_real_mode(struct trampoline_header *th) th->flags |= TH_FLAGS_SME_ACTIVE; if (sev_es_active()) { + /* + * Skip the call to verify_cpu() in secondary_startup_64 as it + * will cause #VC exceptions when the AP can't handle them yet. + */ + th->start = (u64) secondary_startup_64_no_verify; + if (sev_es_setup_ap_jump_table(real_mode_header)) panic("Failed to get/update SEV-ES AP Jump Table"); } |