diff options
| author | Joerg Roedel <jroedel@suse.de> | 2020-09-07 16:15:23 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-09-07 20:45:25 +0300 |
| commit | c81d60029a1393183d2125fcb4b64831629b8864 (patch) | |
| tree | d43b1341d783e6aaf28b2d41f7c2503ca1e9e413 /arch/x86/boot/compressed/misc.h | |
| parent | 4b3fdca64a7e8ad90c87cad1fbc6991471f48dc7 (diff) | |
| download | linux-c81d60029a1393183d2125fcb4b64831629b8864.tar.xz | |
x86/boot/compressed/64: Add set_page_en/decrypted() helpers
The functions are needed to map the GHCB for SEV-ES guests. The GHCB
is used for communication with the hypervisor, so its content must not
be encrypted. After the GHCB is not needed anymore it must be mapped
encrypted again so that the running kernel image can safely re-use the
memory.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200907131613.12703-23-joro@8bytes.org
Diffstat (limited to 'arch/x86/boot/compressed/misc.h')
| -rw-r--r-- | arch/x86/boot/compressed/misc.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h index eaa8b45ebccb..01c0fb3417ca 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -98,6 +98,8 @@ static inline void choose_random_location(unsigned long input, #endif #ifdef CONFIG_X86_64 +extern int set_page_decrypted(unsigned long address); +extern int set_page_encrypted(unsigned long address); extern unsigned char _pgtable[]; #endif |