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| author | Martin Radev <martin.b.radev@gmail.com> | 2020-09-07 15:16:13 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-09-10 21:49:25 +0200 |
| commit | f5ed777586e08e09c4b6f1e87161a145ee1431cf (patch) | |
| tree | 91064c42050caa1d751b7f3ee76b8bf3f909b4aa /arch/x86/boot/compressed/misc.h | |
| parent | 39336f4ffb2478ad384075cf4ba7ef2e5db2bbd7 (diff) | |
| download | linux-f5ed777586e08e09c4b6f1e87161a145ee1431cf.tar.bz2 | |
x86/sev-es: Check required CPU features for SEV-ES
Make sure the machine supports RDRAND, otherwise there is no trusted
source of randomness in the system.
To also check this in the pre-decompression stage, make has_cpuflag()
not depend on CONFIG_RANDOMIZE_BASE anymore.
Signed-off-by: Martin Radev <martin.b.radev@gmail.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20200907131613.12703-73-joro@8bytes.org
Diffstat (limited to 'arch/x86/boot/compressed/misc.h')
| -rw-r--r-- | arch/x86/boot/compressed/misc.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h index c0e0ffeee50a..6d31f1b4c4d1 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -85,8 +85,6 @@ void choose_random_location(unsigned long input, unsigned long *output, unsigned long output_size, unsigned long *virt_addr); -/* cpuflags.c */ -bool has_cpuflag(int flag); #else static inline void choose_random_location(unsigned long input, unsigned long input_size, @@ -97,6 +95,9 @@ static inline void choose_random_location(unsigned long input, } #endif +/* cpuflags.c */ +bool has_cpuflag(int flag); + #ifdef CONFIG_X86_64 extern int set_page_decrypted(unsigned long address); extern int set_page_encrypted(unsigned long address); |