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| author | Brijesh Singh <brijesh.singh@amd.com> | 2022-02-24 10:56:01 -0600 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-04-06 13:24:53 +0200 |
| commit | dc3f3d2474b80eaee8be89f4c5eb344f10648f42 (patch) | |
| tree | 2c72a1701916d2288f5703f123a0f83c2761bc8f /arch/x86/include/asm/sev.h | |
| parent | 9704c07bf9f7682a83aec4e66f2d9154dbd8577f (diff) | |
| download | lwn-dc3f3d2474b80eaee8be89f4c5eb344f10648f42.tar.gz lwn-dc3f3d2474b80eaee8be89f4c5eb344f10648f42.zip | |
x86/mm: Validate memory when changing the C-bit
Add the needed functionality to change pages state from shared
to private and vice-versa using the Page State Change VMGEXIT as
documented in the GHCB spec.
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220307213356.2797205-22-brijesh.singh@amd.com
Diffstat (limited to 'arch/x86/include/asm/sev.h')
| -rw-r--r-- | arch/x86/include/asm/sev.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h index f65d257e3d4a..feeb93e6ec97 100644 --- a/arch/x86/include/asm/sev.h +++ b/arch/x86/include/asm/sev.h @@ -128,6 +128,8 @@ void __init early_snp_set_memory_private(unsigned long vaddr, unsigned long padd void __init early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr, unsigned int npages); void __init snp_prep_memory(unsigned long paddr, unsigned int sz, enum psc_op op); +void snp_set_memory_shared(unsigned long vaddr, unsigned int npages); +void snp_set_memory_private(unsigned long vaddr, unsigned int npages); #else static inline void sev_es_ist_enter(struct pt_regs *regs) { } static inline void sev_es_ist_exit(void) { } @@ -142,6 +144,8 @@ early_snp_set_memory_private(unsigned long vaddr, unsigned long paddr, unsigned static inline void __init early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr, unsigned int npages) { } static inline void __init snp_prep_memory(unsigned long paddr, unsigned int sz, enum psc_op op) { } +static inline void snp_set_memory_shared(unsigned long vaddr, unsigned int npages) { } +static inline void snp_set_memory_private(unsigned long vaddr, unsigned int npages) { } #endif #endif |