diff options
| author | Joerg Roedel <jroedel@suse.de> | 2020-09-07 15:16:06 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-09-09 11:33:20 +0200 |
| commit | bf5ff276448f64f1f9ef9ffc9e231026e3887d3d (patch) | |
| tree | 9ace2deb346c3d161a42923f4164948a27994651 /arch/x86/realmode/rm/header.S | |
| parent | 1a222de8dcfb903d039810b0823570ee0be4e6c6 (diff) | |
x86/realmode: Add SEV-ES specific trampoline entry point
The code at the trampoline entry point is executed in real-mode. In
real-mode, #VC exceptions can't be handled so anything that might cause
such an exception must be avoided.
In the standard trampoline entry code this is the WBINVD instruction and
the call to verify_cpu(), which are both not needed anyway when running
as an SEV-ES guest.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200907131613.12703-66-joro@8bytes.org
Diffstat (limited to 'arch/x86/realmode/rm/header.S')
| -rw-r--r-- | arch/x86/realmode/rm/header.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/realmode/rm/header.S b/arch/x86/realmode/rm/header.S index af04512c02d9..8c1db5bf5d78 100644 --- a/arch/x86/realmode/rm/header.S +++ b/arch/x86/realmode/rm/header.S @@ -20,6 +20,9 @@ SYM_DATA_START(real_mode_header) /* SMP trampoline */ .long pa_trampoline_start .long pa_trampoline_header +#ifdef CONFIG_AMD_MEM_ENCRYPT + .long pa_sev_es_trampoline_start +#endif #ifdef CONFIG_X86_64 .long pa_trampoline_pgd; #endif |