diff options
| author | Joerg Roedel <jroedel@suse.de> | 2020-09-07 16:15:25 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-09-07 20:45:26 +0300 |
| commit | 69add17a7c1992593a7cf775a66e0256ad4b3ef8 (patch) | |
| tree | 74d7dd41c4f9fc80d5bfd12498b6ac6029d3bfd7 /arch/x86/boot/compressed/misc.h | |
| parent | 597cfe48212a3f110ab0f918bf59791f453e65b7 (diff) | |
| download | linux-69add17a7c1992593a7cf775a66e0256ad4b3ef8.tar.xz | |
x86/boot/compressed/64: Unmap GHCB page before booting the kernel
Force a page-fault on any further accesses to the GHCB page when they
shouldn't happen anymore. This will catch any bugs where a #VC exception
is raised even though none is expected anymore.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200907131613.12703-25-joro@8bytes.org
Diffstat (limited to 'arch/x86/boot/compressed/misc.h')
| -rw-r--r-- | arch/x86/boot/compressed/misc.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h index 9995c70ca813..c0e0ffeee50a 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -100,6 +100,7 @@ static inline void choose_random_location(unsigned long input, #ifdef CONFIG_X86_64 extern int set_page_decrypted(unsigned long address); extern int set_page_encrypted(unsigned long address); +extern int set_page_non_present(unsigned long address); extern unsigned char _pgtable[]; #endif @@ -117,8 +118,13 @@ void set_sev_encryption_mask(void); #ifdef CONFIG_AMD_MEM_ENCRYPT void sev_es_shutdown_ghcb(void); +extern bool sev_es_check_ghcb_fault(unsigned long address); #else static inline void sev_es_shutdown_ghcb(void) { } +static inline bool sev_es_check_ghcb_fault(unsigned long address) +{ + return false; +} #endif /* acpi.c */ |