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| 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/include/asm/realmode.h | |
| parent | x86/vmware: Add VMware-specific handling for VMMCALL under SEV-ES (diff) | |
| download | linux-bf5ff276448f64f1f9ef9ffc9e231026e3887d3d.tar.xz linux-bf5ff276448f64f1f9ef9ffc9e231026e3887d3d.zip | |
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/include/asm/realmode.h')
| -rw-r--r-- | arch/x86/include/asm/realmode.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/realmode.h b/arch/x86/include/asm/realmode.h index 96118fb041b8..4d4d853f6841 100644 --- a/arch/x86/include/asm/realmode.h +++ b/arch/x86/include/asm/realmode.h @@ -21,6 +21,9 @@ struct real_mode_header { /* SMP trampoline */ u32 trampoline_start; u32 trampoline_header; +#ifdef CONFIG_AMD_MEM_ENCRYPT + u32 sev_es_trampoline_start; +#endif #ifdef CONFIG_X86_64 u32 trampoline_pgd; #endif |