diff options
| author | Anshuman Khandual <khandual@linux.vnet.ibm.com> | 2019-08-20 05:13:19 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-08-30 02:55:40 +0300 |
| commit | d5394c059da9786043934bed474562cde124e7d3 (patch) | |
| tree | e5507805d559e0fe4dae9659105fc5ac2e484bca /arch/powerpc/include | |
| parent | bd104e6db6f0ad124e507a9ecf1a468efe5697db (diff) | |
| download | linux-d5394c059da9786043934bed474562cde124e7d3.tar.xz | |
powerpc/pseries/svm: Use shared memory for Debug Trace Log (DTL)
Secure guests need to share the DTL buffers with the hypervisor. To that
end, use a kmem_cache constructor which converts the underlying buddy
allocated SLUB cache pages into shared memory.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190820021326.6884-10-bauerman@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/svm.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/svm.h b/arch/powerpc/include/asm/svm.h index 2689d8d841f8..85580b30aba4 100644 --- a/arch/powerpc/include/asm/svm.h +++ b/arch/powerpc/include/asm/svm.h @@ -15,6 +15,9 @@ static inline bool is_secure_guest(void) return mfmsr() & MSR_S; } +void dtl_cache_ctor(void *addr); +#define get_dtl_cache_ctor() (is_secure_guest() ? dtl_cache_ctor : NULL) + #else /* CONFIG_PPC_SVM */ static inline bool is_secure_guest(void) @@ -22,5 +25,7 @@ static inline bool is_secure_guest(void) return false; } +#define get_dtl_cache_ctor() NULL + #endif /* CONFIG_PPC_SVM */ #endif /* _ASM_POWERPC_SVM_H */ |