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| author | Anshuman Khandual <khandual@linux.vnet.ibm.com> | 2019-08-19 23:13:19 -0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-08-30 09:55:40 +1000 |
| commit | d5394c059da9786043934bed474562cde124e7d3 (patch) | |
| tree | e5507805d559e0fe4dae9659105fc5ac2e484bca /arch/powerpc/platforms/pseries/setup.c | |
| parent | bd104e6db6f0ad124e507a9ecf1a468efe5697db (diff) | |
| download | linux-stable-d5394c059da9786043934bed474562cde124e7d3.tar.gz linux-stable-d5394c059da9786043934bed474562cde124e7d3.tar.bz2 linux-stable-d5394c059da9786043934bed474562cde124e7d3.zip | |
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/platforms/pseries/setup.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index f5940cc71c37..d8930c3a8a11 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -69,6 +69,7 @@ #include <asm/security_features.h> #include <asm/asm-const.h> #include <asm/swiotlb.h> +#include <asm/svm.h> #include "pseries.h" #include "../../../../drivers/pci/pci.h" @@ -297,8 +298,10 @@ static inline int alloc_dispatch_logs(void) static int alloc_dispatch_log_kmem_cache(void) { + void (*ctor)(void *) = get_dtl_cache_ctor(); + dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES, - DISPATCH_LOG_BYTES, 0, NULL); + DISPATCH_LOG_BYTES, 0, ctor); if (!dtl_cache) { pr_warn("Failed to create dispatch trace log buffer cache\n"); pr_warn("Stolen time statistics will be unreliable\n"); |