diff options
| author | Michael Roth <michael.roth@amd.com> | 2022-02-24 10:56:17 -0600 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-04-07 16:47:11 +0200 |
| commit | 76f61e1e89b32f3e5d639f1b57413a919066da06 (patch) | |
| tree | ca4df99849282409d8e689445d2b83f6f371c330 /arch/x86/boot/compressed/misc.h | |
| parent | a9ee679b1f8c3803490ed2eeffb688aaee56583f (diff) | |
x86/compressed/64: Add identity mapping for Confidential Computing blob
The run-time kernel will need to access the Confidential Computing blob
very early during boot to access the CPUID table it points to. At that
stage, it will be relying on the identity-mapped page table set up by
the boot/compressed kernel, so make sure the blob and the CPUID table it
points to are mapped in advance.
[ bp: Massage. ]
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220307213356.2797205-38-brijesh.singh@amd.com
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 aae2722c6e9a..75d284ec763f 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -127,6 +127,7 @@ void sev_es_shutdown_ghcb(void); extern bool sev_es_check_ghcb_fault(unsigned long address); void snp_set_page_private(unsigned long paddr); void snp_set_page_shared(unsigned long paddr); +void sev_prep_identity_maps(unsigned long top_level_pgt); #else static inline void sev_enable(struct boot_params *bp) { } static inline void sev_es_shutdown_ghcb(void) { } @@ -136,6 +137,7 @@ static inline bool sev_es_check_ghcb_fault(unsigned long address) } static inline void snp_set_page_private(unsigned long paddr) { } static inline void snp_set_page_shared(unsigned long paddr) { } +static inline void sev_prep_identity_maps(unsigned long top_level_pgt) { } #endif /* acpi.c */ |